| HAMILTON SUNDSTRAND CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20120134800 | PROPELLER PITCHLOCK UN-LOCKING DEVICE - A propeller system includes a plurality of propeller blades and a pitch lock mechanism operably connected to the plurality of propeller blades. The pitch lock mechanism includes a pitch lock chamber and a pitch lock piston located in the pitch lock chamber biased toward a locked position when there is insufficient pressure in the pitch lock chamber thereby locking the pitch of the plurality of propeller blades. The propeller system includes a pitch unlock mechanism including a pitch unlock housing and a pitch unlock piston disposed in the pitch unlock housing. A fitting extends through the propeller system to the pitch unlock housing and introduction of fluid flow into the pitch unlock housing through the fitting urges the pitch unlock piston into contact with the pitch lock piston to overcome the bias of the pitch lock piston thereby unlocking the pitch of the plurality of propeller blades. | 05-31-2012 |
| 20120130587 | METHOD OF MONITORING AN ELECTRONIC ENGINE CONTROL (EEC) TO DETECT A LOSS OF FUEL SCREEN OPEN AREA - A method of sensing a reduction in fuel screen area in a fuel system. The method includes detecting an engine shutdown, initiating an electronic engine control (EEC) built in test, shifting a metering valve from a first position to a second position, determining a travel time of the metering valve, and sensing a reduction in fuel screen area based on the travel time of the metering valve. | 05-24-2012 |
| 20120126758 | HIGH VOLTAGE DC POWER GENERATION - A DC power system includes a permanent magnet generator (PMG), and an active rectifier in electrical communication with the PMG. The active rectifier is adapted to actively rectify power output from the PMG if the PMG is operating at low speed, and the active rectifier is further adapted to passively rectify power output from the PMG if the PMG is operating at high speed. | 05-24-2012 |
| 20120125594 | Heat Exchanger System - A heat exchanger system is provided having a heat exchanger with a first inlet. A first outlet is fluidly coupled to the first inlet by a plurality of first channels. A second outlet is fluidly coupled to the first inlet by a second channel, the second channel having a first portion arranged transverse to the plurality of first channels. A bypass valve having a second inlet fluidly coupled to the first outlet and a third inlet fluidly coupled to the second outlet, and a third outlet selectively fluidly coupled to the second inlet and the third inlet, the third outlet being fluidly coupled to the first inlet. When in a bypass mode of operation, the thermal transfer medium flows through a channel in the heat exchanger to de-congeal the oil within the plurality of first channels. | 05-24-2012 |
| 20120121495 | HIGH TEMPERATURE STABLE NANOCRYSTALLINE SiGe THERMOELECTRIC MATERIAL - A method of forming a nanocomposite thermoelectric material having microstructural stability at temperatures greater than 1,000° C. The method includes creating nanocrystalline powder by cryomilling. The method is particularly useful in forming SiGe alloy powder. | 05-17-2012 |
| 20120121373 | Cranking Pad Interlock - A cranking pad assembly for a gearbox of a turbomachine including a cranking pad shaft rotatably secured in a gearbox housing and engageable with a gearbox drivetrain when urged inwardly into the gearbox housing. The cranking pad shaft includes an interface for a cranking tool. An interlock pin retains the cranking tool at the cranking pad shaft and a disconnect spring is operably connected to the gearbox housing to bias the cranking pad shaft outwardly from the gearbox housing. | 05-17-2012 |
| 20120120689 | FAULT TOLERANT DC POWER SYSTEMS - A fault tolerant DC power system includes a permanent magnet generator (PMG), a first contactor in electrical communication with the PMG, an active rectifier in electrical communication with the first contactor, a second contactor in electrical communication with the first contactor, and a motor drive in electrical communication with the second contactor. The first contactor is configured to sever electrical communication between the PMG and the active rectifier and the second contactor is configured to establish electrical communication between the PMG and the motor drive. | 05-17-2012 |
| 20120119711 | HIGH VOLTAGE DC POWER GENERATION - A DC power generating system includes a permanent magnet generator (PMG), an active rectifier in electrical communication with the PMG, and a controller in electrical communication with the active rectifier, wherein the controller is configured to regulate d-q components of a stator current of the PMG in a synchronous reference frame. | 05-17-2012 |
| 20120119602 | Cooling of Permanent Magnet Electric Machine - A permanent magnet electric machine includes a rotor having a plurality of permanent magnets and a stator in magnetic communication with the rotor and positioned defining a radial air gap between the rotor and the stator. A housing is configured to seal the rotor and the stator from an outside environment. A pumping element is configured to urge a closed loop airflow across the plurality of permanent magnets to remove thermal energy therefrom, and a plurality of cooling channels are located in the housing and are configured to transfer thermal energy from the stator to a flow of fluid coolant through the plurality of cooling channels. A heat exchanger is located in thermal communication with the plurality of cooling channels to transfer thermal energy from the airflow to the fluid coolant. | 05-17-2012 |
| 20120118103 | INTEGRATED ACCESSORY GEARBOX AND ENGINE STARTER - An air turbine starter and accessory gearbox assembly, the accessory gearbox includes a gear shaft and the air turbine starter includes an output shaft and a clutch assembly. The output shaft extends from the accessory gearbox and is coupled to and supported by the gear shaft. The accessory gearbox is adapted to receive the air turbine starter such that the clutch assembly and the output shaft are disposed within a casing of the accessory gearbox when the air turbine starter is mounted to the accessory gearbox. | 05-17-2012 |
| 20120117974 | AIR FLOW DELIVERY AND FUEL CONSUMPTION CONTROL FOR AIRCRAFT AIR MANAGEMENT AND AUXILIARY POWER SYSTEMS - A turbine controller controls the operation of a gas turbine generator used to drive an electric generator of an aircraft. The turbine controller controls the gas turbine generator according to air flow demand signals indicative of air flow required by an air management system that regulates cabin pressure and temperature of the aircraft. | 05-17-2012 |
| 20120114504 | VERTICAL SHAFT PUMPING SYSTEM - A vertical shaft pumping system includes a hollow shaft with an inner bore, an inlet end and an outlet end, the outlet end with at least one liquid distribution hole. It further includes an impeller positioned at the lower inlet end of the shaft, with a cylindrical base portion with a lower end, a central hole for drawing fluid into the shaft, and a plurality of teeth extending upwards from the cylindrical base portion and extending radially from the central hole to the outer cylindrical circumference for increasing tractive force of liquid in the shaft when the impeller and shaft are rotating; and a motor for rotating the shaft with the impeller to centrifugally pump a liquid vertically in the shaft from the lower inlet end to the upper outlet end. | 05-10-2012 |
| 20120114485 | RAM AIR TURBINE STARTUP - A ram air turbine (RAT) in which a cam follower is operably coupled to turbine blades such that a cam follower position determines turbine blade pitch. | 05-10-2012 |
| 20120114475 | AIR TURBINE STARTER ONE-PIECE AIR EXIT PORT BAFFLE - A one-piece air exit port baffle for containment for an air start turbine includes a circular arc section with a circumferentially corrugated circular arc section and a flange section. The circumferentially corrugated circular arc section has a plurality of openings. The flange section is axially adjacent to the circumferentially corrugated circular arc section and configured for attachment adjacent to an air exit port of an air turbine starter. | 05-10-2012 |
| 20120114463 | MOTOR DRIVEN CABIN AIR COMPRESSOR WITH VARIABLE DIFFUSER - An air cycle machine is provided and includes a compressor section having a variable area diffuser, a turbine section having an inlet nozzle with a variable size, a motor to drive the compressor and a common rotating shaft on which the compressor section, the turbine section and the motor are mounted, the turbine section driving rotation of the shaft to drive the compressor section with the motor. | 05-10-2012 |
| 20120112578 | HEAT TRANSFER ASSEMBLY FOR ELECTRIC MOTOR ROTOR - A motor driven assembly comprises a motor shaft, a rotor, a passage, and a corrugated fin heat transfer structure. The motor shaft is mounted for rotation about a rotational axis. The rotor is located radially about the shaft. The passage extends through the rotor alongside the motor shaft. The corrugated fin heat transfer structure is disposed within the passage radially aligned with the rotor. | 05-10-2012 |
| 20120112575 | INTEGRATED PERMANENT MAGNET ALTERNATOR AND COOLING FAN - A permanent magnet alternator includes a permanent magnet alternator stator attached to a housing. A shaft is rotatable with respect to the housing with a permanent magnet alternator rotor attached to the shaft. The permanent magnet alternator rotor is positioned with respect to the permanent magnet alternator stator so as to generate electricity when the shaft rotates. A cooling fan is also attached to the shaft and is positioned in a gas flow path for flowing air through the gas flow path. | 05-10-2012 |
| 20120112103 | SEAL ASSEMBLY FOR METERING VALVE - A seal assembly for an electric component includes a generally cylindrical plug, a first O-ring seal and a second O-ring seal. The plug includes a sidewall extending between first and second end walls. An annular groove circumscribes the sidewall. A first O-ring seal is disposed in the annular groove. A first through-bore extends between the first end wall and the second end wall. A first counter-bore circumscribes the first through-bore in the first end wall. A second O-ring seal is disposed within the first counter-bore. | 05-10-2012 |
| 20120111536 | AQUEOUS BASED COOLING OF COMPONENTS HAVING HIGH SURFACE AREA LEVELS OF ALUMINUM OR NICKEL - An aqueous-based coolant for cooling and reducing corrosion potential in applications having high aluminum or nickel surface area to coolant volume ratios has a pH between 8 and 9 and includes about 35 weight % to about 65 weight % propylene glycol, about 1.0 weight % to about 4.0 weight % 2-ethylhexanoic acid, about 0.25 weight % to about 1.0 weight % sebacic acid, about 0.25 weight % to about 1.0 weight % benzoic acid and about 0.03 weight % to about 0.1 weight % molybdate oxyanion. A cooling system includes an aluminum or nickel surface and the aqueous-based coolant. A method of cooling a component surface containing aluminum or nickel includes delivering the aqueous-based coolant to the component surface and cooling the component surface with the aqueous-based coolant. | 05-10-2012 |
| 20120111046 | THERMAL MANAGEMENT SYSTEM WITH STAGED COOLING - A thermal management system comprises a first heat exchanger having an inlet and an outlet, a second heat exchanger having an inlet and an outlet, a fluid loop, a first heat pump, and a second heat pump. The fluid loop circulates a fluid, and forms a continuous path between the first and second heat exchangers. The first heat pump is connected to the fluid loop and is disposed between the outlet of the second heat exchanger and the inlet of the first heat exchanger. The second heat pump is connected to the fluid loop and is disposed between the outlet of the first heat exchanger and the inlet of the second heat exchanger. | 05-10-2012 |
| 20120111022 | COMBINED AIR TURBINE STARTER, AIR-OIL COOLER, AND FAN - An air turbine starter assembly includes a starter turbine housing having a turbine gas flow path and a fan gas flow path, and a shaft rotatable with respect to the starter turbine housing. A plurality of turbine blades are connected to the shaft. A plurality of fan blades are also connected to the shaft. | 05-10-2012 |
| 20120107131 | CENTRIFUGAL COMPRESSOR IMPELLER - A compressor impeller includes a hub, main blades and splitter blades. The main blades are equally spaced around the circumference of the hub. Each splitter blade is equally spaced between two adjacent main blades. Each main blade and splitter blade has suction and pressure surfaces formed in substantial compliance with normalized Cartesian coordinate values of X, Y, and Z set forth in Tables 1-4. When connected by smooth, continuing arcs, the normalized Cartesian coordinates form complete main blade and splitter blade shapes that are substantially matched by the main blade and splitter blade shapes of the compressor impeller. | 05-03-2012 |
| 20120107119 | PARTIAL COARSE PITCH START RAM AIR TURBINE WITH ENHANCED SPRING SUPPORT - A Ram Air Turbine (RAT) is provided and includes a turbine hub having an end plate and a nose cone attached thereto at trailing and leading ends, respectively, a governor shaft, to which turbine blades are connected, which is coupled to the end plate and supported within the nose cone to be rotatable with the turbine blades about a central axis thereof and axially movable from a first position relative to the turbine hub to a second position relative to the turbine hub and a hub assembly operably coupled to the turbine hub, the governor shaft and the turbine blades whereby the hub assembly biases the governor shaft toward the first position at low rotational speeds such that the turbine blades assume a partial coarse pitch angle, and the second position at high rotational speeds such that the turbine blades assume a fine pitch angle. | 05-03-2012 |
| 20120107094 | SHAFT SPEED AND VIBRATION SENSOR APPARATUS - A rotary apparatus comprises a shaft having a rotational axis, a rotation indicator formed on the shaft, a target feature proximate the rotation indicator, and a sensor proximate the target feature. The target feature extends circumferentially about the shaft, with a radial face transverse to the rotational axis and a circumferential face along the rotational axis. The sensor is oriented toward the rotation indicator to sense a rotational speed of the shaft, and oriented toward the target feature to sense transverse vibrations based on a radial distance to the target feature and longitudinal vibrations based on an axial distance to the target feature. | 05-03-2012 |
| 20120107086 | MOTOR ASSISTED FINE PITCH STARTUP RAM AIR TURBINE - A startup assistance apparatus for a fine pitch Ram Air Turbine (RAT) is provided and includes a generator to provide motive power to the RAT when operating in a first mode and to generate electricity from RAT operation when operating in a second mode and a control unit, including a speed sensing unit configured to sense an operating condition of the generator and a controller operably coupled to the generator and configured to control the generator to operate in the first or the second mode based on the sensed operating condition. | 05-03-2012 |
| 20120106009 | Shunt Regulator at Excitation Output of Generator Control Unit for Overvoltage Protection - An electrical system includes a generator; a generator control unit connected to the generator; and a shunt regulator connected to an excitation output of the generator control unit, wherein the shunt regulator is configured to overload the excitation output of the generator control unit in the event of an overvoltage condition in the electrical system, such that an output voltage of the generator does not exceed a predetermined ceiling voltage during the overvoltage condition. | 05-03-2012 |
| 20120106007 | Shunt Regulator for Overvoltage Protection at Transformer Rectifier Unit of Electrical Generating System - An electrical system includes an alternating current (AC) source; a transformer rectifier unit (TRU) connected to the AC source, the TRU configured to receive AC power from the AC source, convert the AC power to direct current (DC) power, and output DC power; a DC bus configured to receive the DC power output by the TRU; at least one DC load powered by the DC bus; and a shunt regulator connected to the output of the TRU, the shunt regulator configured to overload the output of the TRU in the event of an overvoltage condition at the output of the TRU, such that a voltage available to the DC bus during the overvoltage condition does not exceed a reference voltage. | 05-03-2012 |
| 20120105253 | FAILSAFE LED CONTROL SYSTEM - A display system comprises first and second LED panels for displaying first and second priority aviation data, a power supply, a modulator, a processor and a logic gate. The modulator generates a modulated voltage for the second LED panel, where the second priority data are displayed at a modulated brightness. The processor controls the modulator, and generates a status signal indicating a failure condition of the modulated voltage. The logic gate switches the first LED panel from the modulated voltage to the unmodulated voltage based on the status signal, where the first priority data default from the modulated brightness level to full brightness based on the failure condition. | 05-03-2012 |
| 20120104651 | METHOD OF MAKING A REINFORCED RESIN STRUCTURE - A method of making a reinforced resin structure is disclosed. A volume of uncured resin compound is placed on a first outer surface of a carrier structure comprising a plurality of fibers. The uncured resin compound and the carrier structure are pressed between two cooperating plates to disperse the resin compound into and through a plurality of passages between the plurality of fibers. The dispersed resin compound is cured to fix the resin within the plurality of passages and around the plurality of fibers. | 05-03-2012 |
| 20120103108 | ANTI-ROTATION MECHANISM FOR PITOT TUBE - A valve assembly is provided and includes a pitot tube having an angled tip to extract from a duct formed by a housing a sample of a fluid to be communicated to an actuator configured to operate the duct, the pitot tube being disposed within the housing whereby the pitot tube is fixed longitudinally between the actuator and the housing and laterally within the housing and an anti-rotation mechanism coupled with the pitot tube to rotationally secure the pitot tube such that the angled tip is fixed to face rearwardly. | 05-03-2012 |
| 20120102910 | High Flow Eductor - An exhaust eductor for a gas turbine engine comprises: an engine exhaust chamber with an exhaust chamber inlet that receives engine exhaust from the gas turbine engine and an exhaust chamber outlet that discharges the engine exhaust to establish an exhaust gas flow through the engine exhaust chamber; an air chamber with an air inlet that receives ambient air external to the gas turbine engine; and a mixing baffle that couples the air chamber to the engine exhaust chamber, comprising a first side adjacent the air chamber, a second side adjacent the exhaust chamber, multiple apertures through the mixing baffle that extend from the first side to the second side of the mixing baffle, each aperture having a corresponding canopy that extends from an upstream end of the aperture along the second side of the mixing baffle into the exhaust gas flow for at least a portion of the length of the aperture, to establish an air flow from the air inlet of the air chamber into the exhaust gas flow. | 05-03-2012 |
| 20120099349 | THREE-LEVEL ACTIVE RECTIFICATION PULSE WIDTH MODULATION CONTROL - An active rectification system includes a three-level active rectifier and a pulse with modulation (PWM) control portion. The three-level active rectifier includes at least three switches, the at least three switches are selectively switchable between an upper state, a center state, and a lower state. The PWM control portion is in communication with the at least three switches, the PWM control portion is configured and disposed to create an upper carrier signal and a lower carrier signal, and the PWM control portion is configured and disposed to selectively switch the at least three switches between the upper state, the center state, and the lower state in response to a phase disposition of the upper carrier signal and the lower carrier signal. | 04-26-2012 |
| 20120098472 | ENGAGEMENT OF A SPINNING AC INDUCTION MOTOR - A mechanism for a motor controller for engaging a spinning motor is provided. A power section is configured to provide power to the motor. A control is configured to control the power section. The control is configured to search for a motor frequency of the motor by applying a small excitation voltage to the motor, and the excitation voltage is initially applied at a voltage frequency which is a maximum frequency. The control is configured to track the motor frequency until the motor frequency is below an equivalent speed command and engage the motor by applying a higher voltage to the motor. | 04-26-2012 |
| 20120098261 | Systems and Methods Involving Electrical Start and Power Generation - A power generation system includes a prime mover, a generator mechanically connected to the prime mover, the generator including a field winding portion and an armature winding portion, a direct current bus node, a first variable frequency drive having an input electrically connected to the bus node and an output electrically connected to the armature winding portion, and an inverter having an input electrically connected to the bus node and an output electrically connected to the field winding portion. | 04-26-2012 |
| 20120097029 | WATER RECOVERY USING THERMALLY LINKED SORBENT BEDS - A water recovery system includes a sorbing bed, a desorbing bed, a heat pump and a controller. The sorbing bed receives a first fluid stream and absorbs and/or adsorbs water from the first fluid stream. The desorbing bed is aligned with and thermally connected to the sorbing bed, and receives a second fluid stream and desorbs water to the second fluid stream. The heat pump is positioned between the sorbing bed and the desorbing bed and transfers heat from the sorbing bed to the desorbing bed. The controller distributes power to the heat pump to maintain an area near the outlet of the desorbing bed at a temperature greater than an area of the sorbing bed aligned with the area near the outlet of the desorbing bed. A method for recovering water from a fluid stream includes directing fluid streams through the described water recovery system. | 04-26-2012 |
| 20120096772 | Door System - A door system for an inlet comprises: a first door hinged to face a first direction that covers a portion of the inlet; a second door, adjacent to the first door, hinged to face a second direction opposite the first direction that covers the remainder of the inlet; and an actuator system that operates the doors in selectable door system states comprising: first door closed and second door closed; first door opened and second door closed; first door opened and second door opened; and first door closed and second door opened. | 04-26-2012 |
| 20120095663 | FMU MOUNTED EEC FOR SMALL AIRCRAFT ENGINE APPLICATIONS - A fuel metering unit (FMU) for an aircraft engine includes an effector and an electronic engine controller (EEC). The effector is electrically connected to the EEC to adjust a rate of fuel flowing into the engine. The adjustment is in response to a control signal sent from the EEC. The control signal sent from the EEC is responsive to an engine sensor signal and to airframe sensor information. | 04-19-2012 |
| 20120095662 | ELECTRONIC ENGINE CONTROL SOFTWARE RECONFIGURATION FOR DISTRIBUTED EEC OPERATION - A system for configuring a full authority digital engine controller (FADEC) for use with an engine and an airframe combination. The system includes the FADEC and a data entry plug. The FADEC includes an electronic engine controller (EEC) attached to the engine, an airframe data concentrator (ADC) attached to the airframe, and a digital bus electrically connecting the ADC to the EEC. The ADC includes a data storage device and a data entry plug socket. The data entry plug includes electrical components configured for the engine and the airframe combination. The data entry plug is inserted into the data entry plug socket to direct the ADC to recall configuration data from the data storage device for the engine and the airframe combination and send the configuration data over the digital bus to the EEC. | 04-19-2012 |
| 20120095661 | DISTRIBUTED SMALL ENGINE FADEC - A full authority digital engine controller (FADEC) controls an engine attached to an airframe. The FADEC includes an electronic engine controller (EEC) attached to the engine, an airframe data concentrator (ADC) attached to the airframe, and a digital data bus electrically connecting the ADC to the EEC. The ADC is electrically connected to a plurality of airframe sensors to convert the airframe sensor signals to airframe sensor digital data. The digital bus conducts the airframe sensor digital data to the EEC. | 04-19-2012 |
| 20120093669 | RIM DRIVEN THRUSTER HAVING TRANSVERSE FLUX MOTOR - A rim driven thruster comprises an annular housing, a propulsor assembly, a magnetic rotor assembly and a transverse flux stator assembly. The annular housing defines a flow path extending along an axis. The propulsor assembly is supported within the housing and comprises propeller blades extending radially from the axis of the flow path. The propeller blades are configured to rotate about the axis. The magnetic rotor assembly is mounted to radially outer ends of the propeller blades. The transverse flux stator assembly is mounted to the annular housing and is configured to provide electromagnetic torque to the magnetic rotor assembly. | 04-19-2012 |
| 20120093668 | RIM DRIVEN THRUSTER HAVING PROPELLER DRIVE MODULES - A rim driven thruster comprises an annular housing, a propulsor assembly, a magnetic rotor assembly and a stator assembly. The annular housing defines a flow path extending along an axis. The propulsor assembly is supported within the housing and comprises propeller blades extending radially from the axis of the flow path. The propeller blades are configured to rotate about the axis. The magnetic rotor assembly is mounted to radially outer ends of the propeller blades. The stator assembly comprises spaced propeller drive modules mounted to an inner circumferential surface of the annular housing. The propeller drive modules are configured to provide electromagnetic torque to the magnetic rotor assembly. | 04-19-2012 |
| 20120093653 | TURBINE YOKEPLATE FLYWEIGHTS TO IMPROVE RAT STARTUP - A turbine having a cam follower operable to control turbine blade pitch in association with a position thereof is provided and includes an axially movable plate, a rotational and axially movable flyweight and a system operably coupled to the plate and the flyweight whereby, at low RPMs, the system prevents flyweight rotation such that the plate and the flyweight position the cam follower at a first position, at medium RPMs, the system permits flyweight rotation such that the plate and the flyweight position the cam follower at a second position, and, at high RPMs, the system prevents further flyweight rotation and permits initial axial movement of the plate and the flyweight such that the plate and the flyweight position the cam follower at a third position. | 04-19-2012 |
| 20120091939 | HIGH VOLTAGE DC ELECTRIC POWER GENERATING SYSTEM WITH PERMANENT MAGNET GENERATOR PROTECTION - A permanent magnet generator system provides protection from fault conditions. The system includes a permanent magnet generator having a first, second, and third winding wherein each winding has a first end and a second end. During the normal mode of operation, the first ends of the windings are shorted to a first neutral point and alternating current (AC) voltage developed in the first, second and third windings is provided to a primary output associated with the second ends of the windings. In response to a fault condition on the primary output side of the system, the second ends of the windings are shorted together to a second neutral point and the first ends of the windings are disconnected from the first neutral point. During the backup mode, AC voltage developed in the windings is provided to a secondary output associated with the first ends of the windings. | 04-19-2012 |
| 20120090815 | THERMAL VALVE - A valve includes a housing and a valve seat and a structure fixedly disposed remote from the valve seat, a valve head to open and close the valve seat, fluid being permitted to flow when the valve seat is open and an elastic system anchored on the structure and coupled to the valve head, the elastic system including a biasing element and an elastic element formed of memory metal alloy disposed to contact fluid permitted to flow, the biasing element and the elastic element being configured to cooperatively move the valve head toward a valve seat open position when a fluid temperature is below a lower limit, and the biasing element and the elastic element being further configured to cooperatively move the valve head toward a valve seat closed position in opposition to the biasing element when the fluid temperature is above an upper limit. | 04-19-2012 |
| 20120090330 | METHOD OF OPERATING AN ELECTRONIC ENGINE CONTROL (EEC) TO COMPENSATE FOR SPEED CHANGES - A method of operating an electronic engine control to compensate for speed changes. The method includes receiving a fuel flow request, sensing actual engine rotor speed, calculating a fuel flow correction factor, establishing a final fuel flow request based on the fuel flow correction factor, and adjusting the actual set point of the MV to compensate for the actual engine rotor speed. | 04-19-2012 |
| 20120084628 | RAM SINGLE EVENT UPSET (SEU) METHOD TO CORRECT ERRORS - An error detection and correction (EDAC) circuit mitigates the effect of single event upsets (SEU) events in a redundant memory system. The EDAC circuit includes a first input for receiving first data and parity information stored by a first memory device and a second input for receiving second data and parity information stored by a second memory device. First parity check logic calculates parity for the received first data and parity information. Second parity check logic calculates parity for the received second data and parity information. Bit comparison logic detects differences between the first data and the second data, and between the first parity information and the second parity information. Based on the parity check calculated for the first and second data, and the bit comparison, data select logic selects either the first data or the second data for provision to a data bus. | 04-05-2012 |
| 20120080165 | HEAT EXCHANGER FOR MOTOR CONTROLLER - A heat exchanger apparatus is provided and includes a motor controller housing, supportively disposed with a turbofan within an aircraft engine nacelle, in which motor controller components are mounted, a fuel cooled cold plate, forming a surface of the housing, which forms a heat transfer path by which motor controller component generated heat is dissipated during first conditions and an air cooled cold plate, disposed in thermal communication with the fuel cooled cold plate, which extends into a flow path of nacelle air generated by the turbofan to form an extended heat transfer path by which the motor controller component generated heat is dissipated during second conditions. | 04-05-2012 |
| 20120073301 | CRITICAL FLOW NOZZLE FOR CONTROLLING FUEL DISTRIBUTION AND BURNER STABILITY - A fuel delivery system for delivering fuel to a gas turbine engine includes a fixed critical flow nozzle, a first fuel nozzle and a second fuel nozzle. The fixed critical flow nozzle and the variable critical flow nozzle are connected to a fuel source in parallel. The fixed critical flow nozzle has an orifice throat with a fixed effective cross-sectional area. The variable critical flow nozzle has an orifice throat with a variable effective cross-sectional area. The first fuel nozzle is connected to the fixed critical flow nozzle for delivering fuel to the gas turbine engine, and the second fuel nozzle is connected to the variable critical flow nozzle for delivering fuel to the gas turbine engine. | 03-29-2012 |
| 20120067062 | TURBINE STARTER VALVE - A turbine starter including a valve to modulate an amount of air permitted to flow to a turbine section, a sensor to detect a characteristic of the air at locations defined between the valve and the turbine section and downstream from the turbine section and an electrically powered motor coupled to the valve and the sensor to control the valve to modulate the amount of the air permitted to flow to the turbine section in accordance with the detected characteristic. | 03-22-2012 |
| 20120061601 | GATE VALVE - A high temperature gate valve including a valve body formed to define first and second ports and an exit, each of which has a length-wise dimension greater than a height-wise dimension, and a door, having a length-wise dimension greater than a height-wise dimension, coupled to the valve body to occupy and move between positions at which the door prevents fluid communication between one of the first or the second port and the exit and intermediate positions at which fluid communication between the first and the second port and the exit is permitted. | 03-15-2012 |
| 20120060886 | HIGH TEMPERATURE FLEXIBLE ELECTRODE - An electrode including a first portion to be electrically coupled to a first thermoelectric leg and mechanically coupled to a first heat collector part, a second portion to be electrically coupled to a second thermoelectric leg and mechanically coupled to a second heat collector part and a flexible portion connected between the first and second portions whereby current is transmittable between the first and second thermoelectric legs. | 03-15-2012 |
| 20120056601 | ROTOR BASED AIR GAP HEATING FOR AIR DRIVEN TURBINE - A generator apparatus comprises a deicing circuit. The deicing circuit is operable during a time when a main generator rotor is not being rotated by a generator shaft. The deicing circuit includes a first power source for energizing a plurality of exciter field windings with alternating input current to induce an exciter output current in a plurality of exciter armature windings. The exciter output current is provided to main generator rotor windings for producing resistance heating around an air gap separating the main generator rotor from a main generator stator. | 03-08-2012 |
| 20120045948 | THERMAL EXPANSION COMPENSATOR HAVING AN ELASTIC CONDUCTIVE ELEMENT BONDED TO TWO FACING SURFACES - A thermal expansion compensator is provided and includes a first electrode structure having a first surface, a second electrode structure having a second surface facing the first surface and an elastic element bonded to the first and second surfaces and including a conductive element by which the first and second electrode structures electrically and/or thermally communicate, the conductive element having a length that is not substantially longer than a distance between the first and second surfaces. | 02-23-2012 |
| 20120044969 | ENGINE TURBINE TEMPERATURE MEASUREMENT - An assembly for sensing temperature in a gas turbine engine includes a first array of RTDs connected in parallel, a second array of RTDs connected in parallel, and a circuit electrically connected to the first and second arrays. The circuit determines an approximate temperature of a medium as a function of resistance of the first and second arrays. | 02-23-2012 |
| 20120043921 | CONTROL OF POLE-CHANGE INDUCTION MOTORS - A ram air fan control system includes a ram air fan motor, the ram air fan motor being a pole-change induction motor with at least two pole-count configurations, a ram air fan contactor in operative communication with a first pole-count configuration of the ram air fan motor over a ram air fan conductor bus, a ram air fan power controller in operative communication with the ram air fan contactor, a common contactor in operative communication a second pole-count configuration of the ram air fan motor over a common conductor bus, the common conductor bus being separate and electrically isolated from the ram air fan conductor bus, and a common power controller in operative communication with the common contactor. | 02-23-2012 |
| 20120037624 | ELECTRONIC ENCLOSURE INCLUDING A FLAME ARRESTOR HAVING A MECHANICAL CHECK VALVE - An electronic enclosure includes a housing having a plurality of walls that define an interior portion. A flame arrestor is mounted to one of the plurality of walls of the housing. The flame arrestor includes a mechanical check valve. The mechanical check valve is configured and disposed to allow a fluid to exit the interior portion of the housing and prevent fluid from entering the interior portion of the housing. | 02-16-2012 |
| 20120036866 | AUXILIARY POWER UNIT WITH MULTIPLE FUEL SOURCES - A system and method are disclosed for supplying fuel to an auxiliary power unit of an aircraft. The system includes a primary fuel source, a secondary fuel source, and a secondary valve. The primary fuel source is in fluid communication with the auxiliary power unit to provide a primary fuel thereto. Similarly, the secondary fuel source is in fluid communication with the auxiliary power unit to provide a secondary fuel thereto. The secondary valve regulates flow of the secondary fuel from the secondary fuel source to the auxiliary power unit. The method provides a secondary fuel from a secondary fuel source to the auxiliary power unit if an emergency operating condition experienced by the aircraft results from either exhaustion or contamination of a primary fuel. | 02-16-2012 |
| 20120027509 | RETENTION SYSTEM - A system to retain a sleeve within a housing includes a sleeve, a spring loaded retaining pin which can be moved to be fully within the sleeve, a locking pin to hold the retaining pin within the sleeve when the sleeve is being set into or withdrawn from the housing, and an annular recess in the housing to receive the retaining pin when the sleeve is set in the housing, the locking pin is removed and the retaining pin is pushed outward by the spring. The sleeve is retained within the housing when the spring pushes the retaining pin outward so that the retaining pin engages the annular recess in the housing. | 02-02-2012 |
| 20120026636 | ACTIVE AC INRUSH CURRENT CONTROL - Active inrush current control includes activating a load, the activating causing inrush current to flow, switching a semiconductor switching device to a current limiting state in response to the inrush current flow, the current limiting state being one of at least three states of the semiconductor switching device and the current limiting state dissipating the inrush current, and switching the semiconductor device to a full current flow state in response to the dissipating, the full current flow state not inhibiting current flow. | 02-02-2012 |
| 20120024403 | INORGANIC COKE RESISTANT COATINGS TO PREVENT AIRCRAFT FUEL SYSTEM FOULING - A fuel system for delivering fuel to an engine includes a fuel tank, a hot section in fluid communication with the fuel tank for delivering fuel for combustion by the engine, and a ceramic coating applied to at least a portion of the hot section for reducing fuel coking. The ceramic coating is selected from carbides, nitrides, carbonitrides, silicides and mixtures thereof. | 02-02-2012 |
| 20120023897 | AUXILIARY POWER UNIT FIRE ENCLOSURE DRAIN SEAL - A drain assembly for an auxiliary power unit having a hot zone formed by a combustor case comprises a fire enclosure, a drain fitting, a discharge port and a piston seal. The fire enclosure encapsulates the hot zone of the combustor case. The drain fitting connects to the fire enclosure. The discharge port extends from the combustor case into the drain fitting. The piston seal is positioned between the drain fitting and the discharge port. | 02-02-2012 |
| 20120023896 | AUXILIARY POWER UNIT FIRE ENCLOSURE DRAIN - A drain assembly for an auxiliary power unit having a hot zone formed by a combustor case comprises a fire enclosure, a drain fitting and an orifice. The fire enclosure encapsulates the hot zone. The drain fitting connects to the fire enclosure. The orifice extends from the combustor case into the drain fitting to form an expansion joint. | 02-02-2012 |
| 20120023889 | AUXILIARY POWER UNIT FIRE ENCLOSURE - A fire enclosure for an auxiliary power unit having a hot zone formed by a gas turbine comprises an annular fire enclosure body, an axial expansion joint and a radial expansion joint. The annular fire enclosure body is configured to encapsulate the hot zone. The fire enclosure includes a first end and a second end. The axial expansion joint is connected to the first end. The radial expansion joint is connected to the second end. | 02-02-2012 |
| 20120023747 | METHODS FOR CLUSTER GEAR TIMING AND MANUFACTURING - A method of manufacturing a gear cluster from a first gear body and a second gear body comprises producing a first set of gear teeth on the first gear body such that each tooth on the first set of gear teeth has a first pitch point. The second gear body is axially aligned with the first gear body. A timing position for a second set of gear teeth on the second gear body is determined by dimensioning from the first set of gear teeth. A second set of gear teeth on the second gear body is produced based on the timing position and each tooth on the second set of gear teeth has a second pitch point. The gear cluster is inspected for timing position by measuring a reference dimension between the first pitch point and the second pitch point. | 02-02-2012 |
| 20120020779 | LOW MASS DIFFUSER VANE - A wedge-type diffuser includes a diffuser floor and a plurality of wedge-shaped vanes. The wedge-shaped vanes extend from the diffuser floor and have a top surface, a leading edge and a trailing edge. Each of the wedge-shaped vanes has a slot extending from the trailing edge toward the leading edge. | 01-26-2012 |
| 20120020771 | ONE-PIECE COMPRESSOR AND TURBINE CONTAINMENT SYSTEM - A compressor shroud for containing fragments of a compressor impeller and a turbine wheel within a gas turbine engine. The compressor shroud includes a compressor containment section, a turbine containment section, and a containment continuity section. The containment continuity section connects the compressor containment section and the turbine containment section to form a one-piece part. | 01-26-2012 |
| 20120014784 | RAM AIR FAN MOTOR COOLING - A ram air fan assembly includes a ram air fan disposed at a fan inlet and a ram air fan motor operably connected to the ram air fan. A blower is operably connected to the ram air fan and is configured to redirect a cooling flow across the ram air fan motor from a substantially axially directed flow to a substantially radially directed flow thereby increasing the cooling flow across the ram air fan motor. A method of cooling a ram air fan assembly includes urging a cooling flow toward the ram air fan motor and is directed across the ram air fan motor thus removing thermal energy from the ram air fan motor. The cooling flow proceeds across a blower operably connected to the ram air fan motor, thus directing the cooling flow substantially radially outwardly toward the fan inlet. | 01-19-2012 |
| 20120014064 | NON-CIRCULAR RADIAL HEAT SINK - A heat sink includes a blower located in the heat sink and a plurality of fins extending from a periphery of the blower toward a perimeter of the heat sink. The plurality of fins define a plurality of channels each having a channel inlet located at the blower and a channel exit located at the perimeter of the heat sink. The plurality of channels vary in length around the perimeter of the heat sink A velocity of an air flow from the blower at each channel inlet is substantially equal for each channel of the plurality of channels, and a total pressure drop from the channel inlet to the channel exit is substantially equal for each channel of the plurality of channels. | 01-19-2012 |
| 20120013176 | Enhanced EDU Energy Redistribution - An enhanced electrical distribution unit (EDU) of an aircraft includes power control circuitry disposed to communicate with a power source, a regenerative load control circuit in communication with the power control circuitry and disposed to communicate with a regenerative load, and a passive load control circuit in communication with the power control circuitry and the regenerative load control circuit, the passive load control circuit disposed to communicate with a passive load. The regenerative load control circuit and the passive load control circuit are disposed to arrange a conductive path between the regenerative load and the passive load in response to operation of the regenerative load. | 01-19-2012 |
| 20120011878 | CABIN AIR COMPRESSOR MOTOR COOLING - A cabin air compressor assembly includes a cabin air compressor disposed at a compressor inlet and a cabin air compressor motor operably connected to the cabin air compressor. At least one cooling flow inlet is located at a first end of the cabin air compressor motor substantially opposite a second end whereat the cabin air compressor is located. The cooling flow inlet is configured to direct a cooling flow across the cabin air compressor motor. A blower is operably connected to the cabin air compressor and is configured to urge a cooling flow from across the cabin air compressor motor toward a cooling flow outlet, thereby increasing the cooling flow across the cabin air compressor motor. | 01-19-2012 |
| 20120007428 | Electric Power Generating System with Boost Converter/Synchronous Active Filter - A method of startup of an electric start electrical power generating system (EPGS) is provided. The EPGS includes a generator configured to power a direct current (DC) load via a DC bus. The method includes: disconnecting the DC load from the DC bus; connecting a battery to a boost converter, the boost converter being connected to the generator; powering the generator using the battery via the boost converter; when the generator reaches a minimum speed: disconnecting the battery from the boost converter; deactivating the boost converter; and activating a synchronous active filter, the synchronous active filter being connected to the DC bus; bringing up a voltage on the DC bus by the generator; and when the voltage on the DC bus reaches a predetermined level, connecting the DC load to the DC bus. | 01-12-2012 |
| 20120007425 | Electric Power Generating and Distribution System Comprising a Decoupling Filter and a Solid State Power Controller - An electric power generating system (EPGS) includes a generator configured to power a direct current (DC) load via a power distribution module. The power distribution module includes a solid state power converter (SSPC). A decoupling filter is connected between the generator and the power distribution module. The decoupling filter includes an inductor connected in parallel with a resistor and a solid state switch, the resistor and solid state switch being connected in series. During current limiting conditions in the SSPC, the solid state switch of the decoupling filter is configured to be open, and during the absence of current limiting conditions in the SSPC, the solid state switch of the decoupling filter is configured to be closed. | 01-12-2012 |
| 20120006511 | ACTIVE STRUCTURES FOR HEAT EXCHANGER - A heat exchanger includes a plurality of channels and one or more active flow disruption members disposed at an entrance to the plurality of channels. The active flow disruption members are configured to induce unsteadiness in a flow through the plurality of channels to increase thermal energy transfer in the plurality of channels. A method for transferring thermal energy from a heat exchanger includes locating one or more active flow disruption members at an entrance to a plurality of channels of the heat exchanger. A flow is directed across the one or more active flow disruption members into the plurality of channels and an unsteadiness is produced in the flow via the one or more active flow disruption members. The unsteadiness in the flow increases the transfer of thermal energy between the heat exchanger and the flow. | 01-12-2012 |
| 20120006405 | PANEL-MOUNTED PHOTOVOLTAIC SYSTEM WITH FRESNEL REFLECTOR - A system comprises first and second Fresnel reflectors. Each of the Fresnel reflectors comprises a Fresnel surface with a focus, a radiating surface opposite the Fresnel surface, and a photovoltaic element mounted to the Fresnel surface, in thermally conducting contact with the radiating surface. The first and second Fresnel reflectors form a vertex having a dihedral angle, such that the focus of the first Fresnel reflector is directed toward the photovoltaic element on the second Fresnel reflector, and such that the focus of the second Fresnel reflector is directed toward the photovoltaic element on the first Fresnel reflector. | 01-12-2012 |
| 20120006137 | GEAR DRIVEN ACCESSORY FOR GEARBOX - An accessory gearbox assembly for an aircraft includes one or more intermeshed gears disposed in a gearbox housing and configured to transfer rotational energy from an engine core. An accessory component has a spur gear located at least partially in an accessory housing. The spur gear is meshed with a gear of the one or more gears thereby transferring rotational energy from the gearbox to the accessory component. A method for providing rotational energy to an accessory component at an accessory gearbox includes providing rotational energy to one or more intermeshed gears of an accessory gearbox and locating an accessory component at the accessory gearbox. The accessory component includes a spur gear disposed at least partially in an accessory housing. The spur gear is meshed with a gear of the one or more gears and rotational energy is transferred to the accessory component via the spur gear. | 01-12-2012 |
| 20120006035 | TURBINE RIM CUTTER FOR AIR TURBINE STARTER - An air turbine starter includes an air turbine starter rotor rotatably located at a central axis. The rotor includes a plurality of aerodynamic surfaces extending from a platform. At least one cutting element is located in the air turbine starter such that travel of the rotor along the central axis during operation of the air turbine starter results in removal of the platform and aerodynamic surfaces from the rotor via contact between the at least one cutting element and the rotor. | 01-12-2012 |
| 20120001061 | ION IMPLANTED BEAM DUMP - An optical device is provided and includes a beam splitter disposed to direct a first portion of a light beam propagating along a first light path along a second light path transverse to the first light path and to permit a second portion of the light beam to propagate along a third light path oriented in line with the first light path and a beam dump disposed on the third light path and including a surface upon which the second light beam portion is incident, the beam dump surface having ion implantation defects formed thereon to absorb a substantial entirety of the second light beam portion. | 01-05-2012 |
| 20110318175 | MULTI-STAGE CENTRIFUGAL FAN - A multi-stage centrifugal fan is provided and includes first and second stages of a rotor having substantially axially aligned rotor vanes formed to impart energy to a fluid moving in an outward radial direction when the first and second stages of the rotor rotate about a centerline and a stator having stator vanes radially interposed between and substantially axially aligned with the first and second stage rotor vanes. | 12-29-2011 |
| 20110315273 | SINGLE POINT LUBE SERVICE PORT COMPONENT - A single point lube service port component is provided and includes an elongate annular body, which is formed to define a hollow through which fluid is gravitationally drainable from a first to a second passage and first and second apertures, a seal biased to move from a non-seal position toward a seal position at which fluid communication between the first and second apertures is prevented and a chip collector body removably insertable into the hollow to prevent the gravitational fluid drainage and to urge the seal into the non-seal position. | 12-29-2011 |
| 20110314963 | CONTROLLABLE CONSTANT SPEED GEARBOX - An engine mountable gearbox is provided and includes a body formed to define a plurality of connection points at which a main engine generator and one or more accessories are mounted, a first transmission disposed within the body at the connection point of the main engine generator to run the main engine generator at a controlled constant speed at varying speeds of the engine rotation and a second transmission disposed within the body at least at one of the connection points of the one or more accessories to run the one of the one or more of the accessories at a controlled constant speed at varying speeds of the engine rotation. | 12-29-2011 |
| 20110311358 | Blade Retainment System - A blade retention system for retaining a foot of a turbine blade in a shoe of a turbine disc of a turbine wheel includes: a hook on a heel end of the blade foot that protrudes from a bottom of the blade foot to engage a heel end of the turbine disc shoe; and a compound fillet that engages the hook with the bottom of the blade foot. | 12-22-2011 |
| 20110309784 | COUNTER ELECTRO-MOTORIC FORCE BASED FUNCTIONAL STATUS DETECTION OF AN ELECTRO-MOTOR - The present invention relates to a circuit for detecting a functional status of an electro-motor. Typical electro-motors need additional components to identify the functional status of the motor. This means additional weight for such motors determining the functional status. According to the present invention a circuit is provided using a part of a motor as a sensor for detecting the functional status of the electro-motor. | 12-22-2011 |
| 20110309190 | LAYSHAFT GENERATOR - An apparatus is provided and includes a rotatable shaft on which a first bevel gearbox is disposed, a layshaft on which a second bevel gearbox is disposed, the first and second bevel gearboxes being coupled to transmit shaft rotation to the layshaft, an accessory gearbox to which the layshaft and one or more accessories are coupled and a generator operably disposed on the layshaft between the second bevel gearbox and the accessory gearbox. | 12-22-2011 |
| 20110304942 | SSPC With Dual Fault Detectors - A solid state power controller (SSPC) for a direct current (DC) electrical system includes a high bandwidth fault detector, the high bandwidth fault detector configured to detect a possible fault and place a power switch of the SSPC in saturation at a predetermined current limit; and a low bandwidth fault detector, the low bandwidth fault detector configured to determine whether the possible fault is a confirmed fault, and in the event the possible fault is determined to be the confirmed fault, turning off the power switch, or in the event the possible fault is determined not to be the confirmed fault, turning on the power switch at a minimum on-resistance. | 12-15-2011 |
| 20110304158 | TIME DELAY CONTACTOR FOR AIRCRAFT APU STARTER - A starter for an auxiliary power unit includes a direct current motor operably connectable to an auxiliary power unit. A clutch is arranged in an electrically parallel relationship and configured to operably connect the motor to the auxiliary power unit when engaged, the motor and the clutch powered by a common input line. A time delay switching element is located and configured to delay power delivery to the direct current motor thus providing for full engagement of the clutch prior to initiation of rotation of the motor. | 12-15-2011 |
| 20110304157 | Time Delay Contactor For Aircraft APU Starter - A starter for an auxiliary power unit includes a direct current motor operably connectable to an auxiliary power unit. A clutch is arranged in an electrically parallel relationship and configured to operably connect the motor to the auxiliary power unit when engaged, the motor and the clutch powered by a common input line. A time delay switching element is located and configured to delay power delivery to the direct current motor thus providing for full engagement of the clutch prior to initiation of rotation of the motor. | 12-15-2011 |
| 20110303405 | THREE PHASE FIN SURFACE COOLER - A surface cooler is provided and includes an oil layer, through which oil flows, a separating plate disposed in heat transfer communication with the oil and fins extending into an air flow pathway and being disposed in heat transfer communication with the separating plate, the fins being arranged with varied configurations at each of two or more sections sequentially defined along a predominant direction of air flow along the air flow pathway. | 12-15-2011 |
| 20110303398 | SURFACE COOLER WITH NOISE REDUCTION - A surface cooler is provided and includes an oil layer through which oil flows, fins extending into an air flow pathway and being disposed at a first side of the oil layer in heat transfer communication with the oil, an acoustic lining to reduce noise present in or transmitted by the air flow pathway, which is disposed at a second side of the oil layer opposite the first side and noise transfer tubes extending through the oil layer to transfer the noise present in or transmitted by the air flow pathway to the acoustic lining. | 12-15-2011 |
| 20110299201 | SSPC For Parallel Arc Fault Detection in DC Power System - A solid state power controller (SSPC) for detecting a parallel arc fault in a direct current (DC) power distribution system includes an input, the input being connected to a DC power source; a power switch connected to the input; an output connected to the power switch, the output being connected to a DC motor controller and associated capacitive load; an output current sensor; an output voltage sensor; and an SSPC controller, the SSPC controller being configured to determine the presence of a parallel arc fault in the DC power distribution system and control the power switch via a gate drive based on inputs from the output current sensor and the output voltage sensor. | 12-08-2011 |
| 20110291737 | Multilevel Unidirectional Rectifier with N-2 Switches Per Phase Leg - An N-level rectifier, wherein N is a number of voltage levels of the rectifier, includes an input; a plurality of switching devices connected in parallel, wherein the plurality of switching devices are connected to the input, wherein a number of the plurality of switching devices is equal to N−2; and a plurality of capacitors connected in series, wherein the plurality of capacitors are connected to the plurality of switching devices, wherein a number of the plurality of capacitors is equal to N−1, and wherein the plurality of capacitors are connected to an output of the N-level rectifier; wherein N is greater than three. | 12-01-2011 |
| 20110286141 | SSPC for Soft Start of DC Link Capacitor - A solid state power controller (SSPC) for soft start of a direct current (DC) link capacitor of a DC power distribution system includes a power input connected to a DC power source of the DC power distribution system; a plurality of power switches arranged in parallel, the plurality of power switches being connected to a power output of the SSPC, the power output being connected to the DC link capacitor; and an SSPC controller configured to: pulse width modulate the plurality of power switches with a phase-shifted sequence in a current limiting mode; determine whether soft start is complete; and in response to determining that the soft start is complete, turn on the plurality of switches at a maximum gate-source voltage. | 11-24-2011 |
| 20110285202 | Bus-Tie SSPCS for DC Power Distribution System - A direct current (DC) power distribution system includes a first electrical distribution and power management (EDPM) unit including a first DC power source connected to a first high voltage DC bus connected to a first DC load, and a first bus-tie solid state power controller (SSPC) connected to the first HVDC bus; a second EDPM unit including a second DC power source connected to a second high voltage DC bus connected to a second DC load, and a second bus-tie SSPC being connected to the second HVDC bus; and a bus-tie connected between the first bus-tie SSPC and the second bus-tie SSPC, wherein in the event a power source failure occurs in the first EDPM unit, power flows from the second DC power source to the first HVDC bus via the second bus-tie SSPC, the bus-tie, and the first bus-tie SSPC. | 11-24-2011 |
| 20110280731 | Blade Retainer Clip - A blade retainer clip for retaining a foot of a turbine blade in a shoe of a turbine disc of a turbine wheel includes: a clip shank that fits into a mating slot in the blade foot; a protuberance along a central portion of the clip shank that fits into a mating recess along the mating slot in the blade foot; a clip heel on one end of the clip shank that engages a heel of the blade foot and a heel of the disc shoe that expands radially from at least opposite sides of the clip shank; and a clip toe that extends beyond a toe of the disc shoe that is deformable to contact at least the toe of the disc shoe. | 11-17-2011 |
| 20110277573 | Method of Compensating Gear Carrier Bearing Misalignment under Load - A method of compensating for load-induced twisting of a gear assembly under load that includes a gear on a gear shaft, bearings on each side of the gear that support the gear shaft and a carrier fastened to a stationary support surface that mounts a proximal one of the bearings near the stationary support surface and mounts a distal one of the bearings away from the stationary support surface. The method includes the steps of determining the twisting deflection of a distal bearing axis of rotation for the distal bearing relative to a proximal bearing axis of rotation for the proximal bearing and offsetting the position of the distal bearing axis of rotation relative to the proximal bearing axis of rotation in the carrier opposite the determined deflection under no gear loading. | 11-17-2011 |
| 20110276190 | LOAD SHARING ARCHITECTURE FOR REDUNDANT CHANNEL CONTROLLERS - A redundant, multi-source architecture provides output loads access to each of the plurality of power sources. The architecture includes at a least a first power bus and a second power bus. A plurality of loads are connected to the first power bus and the second power bus. Redundant first and second channel controllers are connected to receive power from the first power bus and the second power bus, respectively, wherein one of the first and second channel controllers is designated as the active channel controller. The active channel controller allocates power from both the first power bus and the second power bus to each of the plurality of loads. | 11-10-2011 |
| 20110263035 | DETERMINING OXYGEN CONCENTRATION IN ULLAGE USING CATALYTIC OXIDATION - A system for measuring the oxygen concentration of a gas includes a catalytic reactor, first and second temperature sensors and a control unit. The catalytic reactor includes a combustion catalyst that supports the catalytic combustion of hydrocarbon fuel vapor in a gas stream. The first temperature sensor is located upstream of the catalytic reactor for sensing an upstream temperature of the gas stream, and the second temperature sensor is located downstream of the catalytic reactor for sensing a downstream temperature of the gas stream. The control unit compares the upstream temperature and the downstream temperature to determine the oxygen concentration of the gas stream. | 10-27-2011 |
| 20110260534 | SSPC for AC Power Distribution - A method of operating an alternating current (AC) power distribution assembly (PDA), where the ACPDA includes a plurality of AC power distribution modules, each connected to a respective AC load includes turning a first switch off and turning a second switch on in each of the AC power distribution modules; starting up each of the respective AC loads; monitoring a load current in the ACPDA and obtaining an acceptable load current in the ACPDA; determining if a set of motor sensor parameters for the ACPDA are within predetermined limits, and, in the event the motor sensor parameters are within the predetermined limits, determining if a startup period has elapsed; and in the event the startup period has elapsed, turning the first switch on and turning the second switch off in each of the AC power distribution modules. | 10-27-2011 |
| 20110259546 | RAM FLOW MODULATION VALVE - A ram air system for an aircraft fluid system includes a ram duct, a diffuser, a fan and a modulating valve. The ram duct has an inlet for receiving ambient air and an outlet for discharging ambient air overboard. The diffuser is positioned within the ram duct to define a fan duct and a bypass duct. The fan is positioned within the fan duct. The modulating valve is positioned in the bypass duct. | 10-27-2011 |
| 20110253346 | AUXILLIARY RESERVOIR FOR A LIQUID SYSTEM - A liquid system for circulating a liquid through a circulation loop includes a liquid pump, a primary liquid reservoir and an auxiliary liquid reservoir. The liquid pump pressurizes liquid within the circulation loop. The primary liquid reservoir has a primary variable volume expandable to accommodate volumetric expansion of pressurized liquid up to a threshold volume. The auxiliary liquid reservoir has an auxiliary variable volume expandable only after the threshold volume is exceeded up to a maximum volume. | 10-20-2011 |
| 20110252823 | VARIABLE TURBINE NOZZLE AND VALVE - An air cycle machine includes a turbine wheel, a turbine inlet nozzle, a valve body, and a poppet member. The turbine wheel is mounted to rotate within the air cycle machine and the turbine inlet nozzle is positioned to direct airflow thereto. The poppet member selectively extends into the turbine inlet nozzle and the valve body controls a pressure on the poppet member to move the poppet member relative to the turbine inlet nozzle to vary the size of the turbine nozzle directing airflow to the turbine wheel. | 10-20-2011 |
| 20110235227 | Remote Power Controller with Parallel FETS - A remote power controller (RPC) includes a line connection; a load connection; a first field effect transistor (FET) and a second FET arranged in parallel between the line connection and the load connection, wherein the first FET has a lower safe operating area (SOA) than a SOA of the second FET, and wherein the first FET has a lower resistance at saturation (RDS(on)) than the second FET; and a voltage offset element connected between the first FET and the second FET, such that in the event that a current in the RPC is above a current limiting setpoint, the voltage offset element is configured to cause the first FET to turn off. | 09-29-2011 |
| 20110234358 | Laminated Inductive Device - An inductive electrical device comprises multiple laminations, each lamination comprising: a generally planar electrically nonconductive substrate that has a central axis normal to its plane, a first surface and a second surface; at least one electrically conductive layer pattern along the first surface in the form of a narrow strip that starts from a first point displaced from the central axis and extends along the first surface about the central axis through a first angle of rotation to a second point; a least one electrically conductive layer pattern along the second surface in the form of a narrow strip that starts from the second point and extends along the second surface about the central axis through a second angle of rotation to at least the first point; an electrically conductive coupling region passing through the substrate proximate the second point that couples the electrically conductive layer pattern along the first surface to the electrically conductive layer pattern along the second surface; wherein stacking the laminations upon each other form at least one winding with multiple turns for the inductive device. | 09-29-2011 |
| 20110232881 | Corrugated Graphite Sheet Heat Transfer Device - A heat transfer device includes at least one laminated structure. Each laminated structure includes: a graphite sheet core that has a pattern of corrugations over at least a portion thereof; a graphite sheet first outer layer with an inner surface that contacts a first surface of the core; and a graphite sheet second outer layer with an inner surface that contacts a second surface of the core. | 09-29-2011 |
| 20110231703 | BAYESIAN APPROACH TO IDENTIFYING SUB-MODULE FAILURE - A diagnostic device identifies failed sub-modules within a larger system based on error codes received from the system. The device stores a likelihood matrix that correlates each sub-module with each possible error code and maintains a likelihood value corresponding to the probability of a failed sub-module generating a corresponding error code and stores a prior probability of failure associated with each sub-module based on prior observational data. In response to received error codes, the device calculates a posterior probability of failure for each of the plurality of sub-modules based on a product of the likelihood values corresponding to the received error codes and the prior probability of failure associated with each sub-module. Based on the calculated posterior probability, the device identifies the sub-module with the highest posterior probability of failure as the failed sub-module. | 09-22-2011 |
| 20110214514 | LOAD MONITORING FOR ELECTROMECHANICAL SYSTEMS - A method for determining a load on a driven component of a rotating or stationary electromechanical system includes locating a rotationally flexible shaft portion in operable communication with a driving component having a drive rotor rotable about an axis and the driven component. The shaft portion is operably connected thereto. Angular positions of the drive rotor and the driven component are determined. A magnitude of a load on the driven component is calculated based on a difference in angular position of the drive rotor and the driven component and a known torsional rigidity of the shaft portion. | 09-08-2011 |
| 20110203363 | Air Monitoring Device - An air monitoring device ( | 08-25-2011 |
| 20110203249 | TURBINE STARTER LUBRICANT COOLING - A cooling system for turbine starter lubricant includes one or more outflow transfer passages ( | 08-25-2011 |
| 20110199094 | Gas Sensor Age Compensation and Failure Detection - A method, system ( | 08-18-2011 |
| 20110198232 | HIGH-DIFFERENTIAL-PRESSURE WATER ELECTROLYSIS CELL AND METHOD OF OPERATION - An electrolysis cell includes an anode, a cathode and a high-differential-pressure water electrolysis bilayer membrane disposed between the anode and the cathode. The high-differential-pressure bilayer membrane includes a platinum-impregnated ion-exchange membrane layer and an untreated ion-exchange membrane layer. The untreated ion-exchange membrane layer is disposed between the anode and the platinum-impregnated ion-exchange membrane layer. | 08-18-2011 |
| 20110188997 | BRAKE MECHANISM FOR AIR TURBINE STARTER - A brake assembly ( | 08-04-2011 |
| 20110187307 | MULTI-SPEED INDUCTION MOTOR - A multi-speed induction motor includes at least two stator windings (a low pole count winding and a high pole count winding) wound around a common stator core. A plurality of stator teeth extend radially inward from a stator yoke, thereby defining a plurality of slots open to its inner diameter. The high pole count winding is wound around the stator core first, such that the high pole count winding is located adjacent to the stator yoke. The low pole count winding is wound subsequently, such that it is radially interior to the high-pole count winding. | 08-04-2011 |
| 20110158808 | METHOD FOR PROPELLER BLADE ROOT FLOW CONTROL BY AIRFLOW THROUGH SPINNER - A propeller blade root airflow system comprises a spinner for shrouding a propeller hub and propeller roots. The spinner has root holes disposed about a spinner circumference for receiving propeller roots, and airflow ducts disposed about a spinner circumference for drawing air into the spinner and away from the root holes. A method for preventing choked flow conditions between adjacent propeller blades in the area of a spinner in a propulsion system comprises rotating the spinner and propeller blades to produce propulsive thrust by driving an air stream past the propeller blades and spinner, and drawing a portion of the air stream into a plurality of ducts disposed within the spinner to prevent choked flow conditions. | 06-30-2011 |
| 20110148505 | SOLID-STATE ALTERNATING CURRENT (AC) SWITCH - A solid-state alternating current (AC) switch provides for the sequential turn-on of the associated solid-state switches to reduce the generation of electromagnetic interference (EMI). The solid-state AC switch includes at least first and second solid-state switches connected in series between an AC input and an AC load. A zero-cross detector circuit monitors the AC input to determine zero-crossings associated with the monitored AC input. A controller turns on the first solid-state switch and the second solid-state switch according to a turn-on sequence in which the first transistor is turned ON during a detected zero-crossing window associated with the first transistor and the second transistor is subsequently turned ON during a detected zero-crossing associated with the second transistor. | 06-23-2011 |
| 20110146740 | THERMOELECTRIC DEVICE ARCHITECTURE - A thermoelectric device ( | 06-23-2011 |
| 20110146446 | Actuator with Differential and Brake - An actuator ( | 06-23-2011 |
| 20110142653 | TWO PIECE IMPELLER - A compressor impeller includes a hub and a plurality of blades. The hub is formed of first forged portion and a second forged portion that are bonded together. The first forged portion is comprised of a first alloy and the second forged portion is comprised of a second alloy that has lower fracture toughness than the first alloy. The blades are integral with and extend from the hub and are formed from the first forged portion. The hub is formed from both the first forged portion and the second forged portion. | 06-16-2011 |
| 20110142646 | PASSIVE CYCLIC PITCH CONTROL - A blade pitch control mechanism for a propeller assembly ( | 06-16-2011 |
| 20110140556 | ELECTRIC MOTOR WITH PASSIVE INTEGRAL BRAKE - An electric motor ( | 06-16-2011 |
| 20110139632 | LONG-TERM STORAGE OF POTABLE WATER IN METALLIC VESSELS - A method for controlling microbial growth in potable water stored in a vessel having a metallic surface includes heating the metallic surface to a temperature between about 480° C. (900° F.) and about 870° C. (1600° F.), exposing the metallic surface to oxygen during heating to oxidize potential reduction sites on the metallic surface and charging potable water containing silver ions to the vessel. A vessel having a metallic surface is prepared for long-term storage of potable water containing silver ions by heating the metallic surface to a temperature between about 480° C. (900° F.) and about 870° C. (1600° F.) and exposing the metallic surface to oxygen during heating to oxidize electropositive metals on the metallic surface or by treating the metallic surface with an aqueous solution containing on oxidizing agent to oxidize potential reduction sites on the metallic surface. | 06-16-2011 |
| 20110139254 | POPPET VALVE WITH DUAL FLOW AREA GAIN - Disclosed is a poppet valve ( | 06-16-2011 |
| 20110138949 | Linear Actuator with Ball Bearing Spline - A linear actuator includes a ball screw, the ball screw configured to rotate; a nut engaged with the ball screw, the nut configured to translate linearly in response to the rotation of the ball screw; and a ball bearing spline integrated into the nut, the ball bearing spline comprising a plurality of ball bearings, wherein the ball bearing spline is configured to react a torque from the rotation of the ball screw. A ball bearing spline is integrated into a translating nut of a linear actuator, the ball bearing spline comprising a plurality of ball bearings, wherein the ball bearing spline is configured to react a torque from a rotation of a ball screw engaged with the translating nut. | 06-16-2011 |
| 20110138941 | TORQUE REACTING BELLOWS SEAL FOR LINEAR ACTUATOR - Disclosed is a linear actuator ( | 06-16-2011 |
| 20110138107 | USB NON-VOLATILE MEMORY SYSTEM FOR AN ELECTRONIC ENGINE CONTROLLER - An electronic engine controller has a processor, a data controller, and a non-volatile memory. During an engine operation, power is supplied to the processor, data controller, and non-volatile memory from an engine power source. Sensor data is received at the processor which supplies the sensor data to the data controller. The data controller stores the sensor data in the non-volatile memory. During data retrieval, power is supplied to the data controller and the non-volatile memory from a USB communications channel. The data controller retrieves the saved sensor data from the non-volatile memory and provides it to the USB communications channel. | 06-09-2011 |
| 20110133703 | ARCHITECTURE FOR DUAL SOURCE ELECTRIC POWER GENERATING SYSTEM - A dual source electric power generating system (EPGS) provides both a regulated AC output and a regulated DC output. The EPGS includes a rotating portion and a stationary portion. The stationary portion includes a plurality of windings (permanent magnet generator (PMG) armature windings, an exciter field winding, and high-voltage main generator armature windings), a voltage regulator, a rectifier, an inverter, a point of regulation (POR) sensor. The high-voltage main generator armature windings generate a high-voltage AC that is converted to a regulated, high-voltage AC by the rectifier and the inverter. The stationary portion is further characterized by circuitry for producing the regulated DC output from AC voltage produced by a winding other than the high-voltage main generator armature windings. | 06-09-2011 |
| 20110131449 | PROCESSING SYSTEM HARDWARE DIAGNOSTICS - A method for diagnosing hardware failures in a data processing system includes a configuring a portion of a programmable logic device to create a state machine. The state machine tests a communication bus and a plurality of component devices connected by the communication bus and identifies the test failures. The state machine communicates the test information to external test equipment. The communication bus is used in the operation of the data processing system and the testing includes tests at full clock speed of the data processing system. | 06-02-2011 |
| 20110128707 | POWER SEMICONDUCTOR MODULE FOR WIDE TEMPERATURE APPLICATIONS - A power semiconductor module includes an insulating substrate with a conductive circuit layer attached to one side and a baseplate attached to the other side. A power semiconductor device is attached to the conductive circuit layer. The conductive circuit layer and the baseplate are formed of a material with a coefficient of thermal expansion less than about 8.0×10 | 06-02-2011 |
| 20110128048 | VOLTAGE CONTROLLED CURRENT DRIVER POWERED BY NEGATIVE VOLTAGE RAIL - A method and current drive circuit is provided that accepts a positive voltage input signal and supplies power to a load from a negative voltage rail. | 06-02-2011 |
| 20110123823 | METHOD OF JOINING GRAPHITE FIBERS TO A SUBSTRATE - Disclosed is a method of assembling a metallic-graphite structure ( | 05-26-2011 |
| 20110121769 | MULTI-TASKING POWER PROCESSOR FOR A VEHICLE ELECTRIC SYSTEM - A multi-tasking power processor ( | 05-26-2011 |
| 20110118076 | Single Planet Gear Rotary Actuator - A rotary actuator comprises a rotatable output ring with a generally denticulate inner surface region and an output ring axis of rotation; a pair of stationary rings, each with a generally denticulate inner surface region and a stationary ring axis, each located on a different end of the output ring with the stationary ring axes in general alignment with the output ring axis; a generally cylindrical planet comprising distal outer regions that each have outer surfaces for supporting the planet, a generally denticulate central outer surface region that engages the denticulate inner surface region of the output ring, and generally denticulate intermediate outer surface regions that each engage the denticulate inner surface region of a respective one of the stationary rings, and a planet axis of rotation that is generally parallel to the output ring axis; and a pair of generally cylindrical planet carriers, each having a carrier axis of rotation in general alignment with the output ring axis, each carrier supporting the outer surface of a respective one of the distal outer regions of the planet to allow rotation of the planet about the planet axis and movement of the planet axis about the output ring axis in a generally circular path as the planet carriers rotate about their carrier axes of rotation; wherein rotation of the planet carriers about their carrier axes cause the cylindrical planet to rotate about its planet axis as it moves through its circular path about the output ring axis, thereby causing the output ring to rotate. | 05-19-2011 |
| 20110114495 | LOW COST, ENVIRONMENTALLY FAVORABLE, CHROMIUM PLATE REPLACEMENT COATING FOR IMPROVED WEAR PERFORMANCE - A coating which improves the wear performance of a part is described. The coating is applied over an article such as a part or a workpiece using an electroplating process. The coating broadly includes a cobalt material matrix with a hardness of at least 550 HV and a plurality of carbide particles distributed throughout the cobalt material matrix. The cobalt material matrix may be a cobalt-phosphorous alloy. The particles interspersed throughout the matrix may be chrome carbide or silicon carbide particles. | 05-19-2011 |
| 20110094379 | FILM-BASED SYSTEM AND METHOD FOR CARBON DIOXIDE SEPARATION - A method for separating CO | 04-28-2011 |
| 20110079286 | Expansion Valve - A valve assembly ( | 04-07-2011 |
| 20110079028 | WATER-FROM-AIR SYSTEM USING A DESICCANT WHEEL - A water-from-air extraction system ( | 04-07-2011 |
| 20110067765 | SELF SEALING DRAIN FITTING - Disclosed is a drain assembly including a buoyant spherical ball ( | 03-24-2011 |
| 20110050184 | ACTIVE RECTIFICATION FOR A VARIABLE-FREQUENCY SYNCHRONOUS GENERATOR - An active rectifier controller decouples measurements of the phase and speed of a variable frequency synchronous generator from measurements of the AC output voltage. The active rectifier controller receives position information representative of the rotor position of the VFSG independent of a load connected to the VFSG that is used to determine the phase position and speed of the VFSG. Based on measurements of the generator speed and phase, the active rectifier controller controls the active rectifier to draw AC currents in-phase with the back-electromotive force (BEMF) voltage of the VFSG. | 03-03-2011 |
| 20110012592 | MAGNETIC FLUX OIL LEVEL SENSOR FOR USE IN AIRCRAFT LUBRICATION SYSTEMS - A magnetic flux position sensor includes a primary coil, a secondary coil, and a magnetic flux conductor. The primary coil generates a magnetic flux and the secondary coil senses magnetic flux. The primary and secondary coils are substantially concentric and spaced apart by an annular passage. The annular passage has first and second ends, and the magnetic flux conductor is slidable from the first end to the second end of the annular passage. The magnetic flux transferred from the primary coil to the secondary coil varies as a function of position of the magnetic flux conductor. | 01-20-2011 |
| 20110012447 | HYBRID CASCADING LUBRICATION AND COOLING SYSTEM - A hybrid cascading lubrication and cooling system ( | 01-20-2011 |
| 20110006713 | COMPACT FPGA-BASED DIGITAL MOTOR CONTROLLER - A compact field programmable gate array (FPGA)-based digital motor controller ( | 01-13-2011 |
| 20110006545 | NESTED EXCITER AND MAIN GENERATOR STAGES FOR A WOUND FIELD GENERATOR - A wound field generator ( | 01-13-2011 |
| 20110005600 | CONTROL SYSTEM FOR A VALVE ASSEMBLY - A valve assembly ( | 01-13-2011 |
| 20110005244 | TRANSCRITICAL FLUID COOLING FOR AEROSPACE APPLICATIONS - A cooling system includes a compressor for compressing a refrigerant from a subcritical state to a supercritical state, a cooler for transferring heat from the refrigerant, an expander for expanding the refrigerant in the supercritical state, an expansion valve for expanding the refrigerant from the supercritical state to the subcritical state and an evaporator for transferring heat from a cooling fluid to the refrigerant in the subcritical state. Work extracted by the expander provides power to the compressor. A method for cooling a vehicle includes compressing a refrigerant from a subcritical state to a supercritical state, cooling the refrigerant, expanding the refrigerant in the supercritical state where work produced by expanding the refrigerant is used to compress the refrigerant, expanding the refrigerant from the supercritical state to the subcritical state, cooling a cooling fluid with the refrigerant in the subcritical state and cooling vehicle components with the cooling fluid. | 01-13-2011 |
| 20110002786 | REMOTE PITCH CONTROLLER FOR A VARIABLE PITCH PROPELLER - A system for adjusting the pitch of a variable pitch propeller has a hub assembly, a valve assembly, and a fluid supply assembly. The hub assembly comprises a hub rotatably driven by a propeller shaft, an actuator connected to the hub, and a plurality of propeller blades connected to the actuator with at least one mechanical connection. The valve assembly is in fluid communication with the valve assembly and the actuator. The fluid supply assembly comprises a valve control mechanism that is isolated from the valve assembly and the hub assembly. The valve control mechanism provides a variable hydraulic pressure control signal to the valve assembly, which transfers fluid to the actuator as a function of the variable hydraulic pressure control signal. Based on the fluid pressure in the actuator, the pitch of the propeller blades is adjusted. | 01-06-2011 |
| 20110001402 | GENERATOR FLEXIBLE DRIVE COUPLING - A generator assembly ( | 01-06-2011 |
| 20110000202 | ACTIVE HYDRAULIC REGENERATION FOR MOTION CONTROL - A hydraulic system including a hydraulic power source ( | 01-06-2011 |
| 20100327820 | ACTIVE DAMPING FOR SYNCHRONOUS GENERATOR TORSIONAL OSCILLATIONS - A generator control unit (GCU) provides active damping of a synchronous generator by monitoring the speed of the synchronous generator and detecting oscillations in the monitored speed. The oscillations are indicative of torsional oscillations within the mechanical drivetrain including the synchronous generator or generators. In response to detected oscillations in the monitored speed, the GCU generates a varying set-point value that is used to control the excitation voltage provided to the synchronous generator. Varying the excitation voltage provided to the synchronous generator causes a variation in synchronous generator torque. By selectively varying the torque in the synchronous generator, the GCU provides active damping in the synchronous generator that decreases or dampens the torsional oscillations. | 12-30-2010 |
| 20100323804 | NESTED TORSIONAL DAMPER FOR AN ELECTRIC MACHINE - A damper for an electric machine ( | 12-23-2010 |
| 20100321968 | LOAD FAULT HANDLING FOR SWITCHED RELUCTANCE OR INDUCTION TYPE MACHINES - An electrical power generation system includes a power source ( | 12-23-2010 |
| 20100320859 | ROTOR FOR PERMANENT MAGNET ELECTRIC MACHINE | 12-23-2010 |
| 20100320033 | SELF CLEANING GREASE LUBRICATED SPLINE - A lubrication system for a spline interface ( | 12-23-2010 |
| 20100315030 | TORQUE HARMONIC REDUCTION CONTROL FOR SWITCHED RELUCTANCE MACHINES - A controller for a switched reluctance machine (SRM) generates current commands that reduce torque harmonics generated by the SRM. The controller monitors the phase currents and rotor position of the SRM to estimate torque generated by the SRM. The current command signal is modified based on the difference between the torque command and the estimated torque. A multiplier that varies with the monitored torque command is applied to the modified current command to provide a smooth phase-to-phase transition. | 12-16-2010 |
| 20100314877 | GAS TURBINE BLEED ENERGY RECOVERY VIA COUNTER ROTATING GENERATOR - A gas turbine engine includes a main compressor section for compressing air, a main combustor section positioned downstream of the main compressor section, a main turbine section positioned downstream of the main combustor section, and a spool extending from the main compressor section to the main turbine section. A second turbine is fluidically connected to the main compressor section by a bleed passage. An electrical generator is mechanically driven by both the spool and the second turbine. | 12-16-2010 |
| 20100313591 | ADAPTIVE HEAT SINK FOR AIRCRAFT ENVIRONMENTAL CONTROL SYSTEM - An avionics cooling system includes a first heat exchange system, a second heat exchange system and a vapor cycle system. The second heat exchange system has a heat sink capacity that is generally out of phase with a heat sink capacity of the first heat exchange system. The vapor cycle includes a fluid loop in communication with the first and second heat exchange systems and the fluid loop transfers heat to the first and second heat exchange systems. A method for cooling aircraft components includes selectively directing a fluid having an elevated temperature in a fluid loop of a vapor cycle system to a first heat exchanger to transfer heat from the fluid to a fuel based on a heat sink capacity of the fuel, selectively directing the fluid to a second heat exchanger to transfer heat from the fluid to air based on a heat sink capacity of the air, and cooling aircraft components with the fluid. | 12-16-2010 |
| 20100313573 | APU BLEED VALVE WITH INTEGRAL ANTI-SURGE PORT - A compressor bleed air valve in an auxiliary power unit (“APU”) modulates bleed air flow both for accessory pneumatic systems powered by the bleed air and for reducing or removing surge in the compressor. | 12-16-2010 |
| 20100310369 | PITCH CHANGE ACTUATION SYSTEM FOR A COUNTER-ROTATING PROPELLER - A system for adjusting the pitch of a counter-rotating propeller has a propeller shaft, a forward propeller driven by the propeller shaft, and an aft propeller connected with the forward propeller. The forward propeller has a hub, blades mounted within the hub, and an actuator connected with an end of the blades. The aft propeller has a hub, blades mounted within the hub, and a cam assembly connected with an end of the blades. The actuator of the forward propeller has a forward end and an aft end, wherein the aft end is connected with the cam assembly of the aft propeller. Thus, when the actuator moves in an axial direction, the cam assembly moves relative to the actuator and the pitch of the forward propeller blades and the pitch of the aft propeller blades are simultaneously adjusted. | 12-09-2010 |
| 20100310368 | ELECTRICAL SYSTEM FOR DRIVING A PROPELLER PITCH CHANGE MECHANISM - A system adjusts the pitch of a variable pitch propeller having a non-rotating side and a rotating side. The rotating side of the propeller has a hub, a propeller blade mounted to the hub, a propeller shaft that rotates the hub and propeller blade, and an actuation system. The actuation system has a screw and a piston. A motor has a non-rotating component in communication with the non-rotating side of the propeller and a rotating component in communication with the actuation system. When the motor increases speed, the screw rotates and the piston moves laterally in a first axial direction to decrease the pitch of the propeller and, when the motor decreases speed, the screw rotates and the piston moves laterally in a second axial direction to increase the pitch of the propeller. | 12-09-2010 |
| 20100308582 | STARTING/GENERATING SYSTEM WITH MULTI-FUNCTIONAL CIRCUIT BREAKER - A pre-charge circuit limits in-rush currents on a direct current (DC) link that includes a first DC link bus and a second DC link bus. The pre-charge circuit includes a switching device connected in series with the first DC link bus. The switching device has an ON state in which power flow is enabled on the DC link and an OFF state in which power is disabled on the DC link. A controller selectively modulates the state of the switching device to limit in-rush currents on the DC link. | 12-09-2010 |
| 20100293961 | GAS TURBINE STARTING WITH STEPPING SPEED CONTROL - The system and method of the present invention provides stepping speed control of a gas turbine engine to reliably light-off a gas turbine engine. During starting, the speed of the gas turbine engine is incremented by stepped amounts through the light-off window from a minimum speed value to a maximum speed value, with the speed of the gas turbine dwelling at each stepped value for a period of time before incrementing the speed of the engine to the next stepped level. If the gas turbine engine is stepped through the entire light-off window without success, the controller decreases the speed of the gas turbine engine to the minimum value and begins the process again. The process continues until successful light-off is initiated or until the light-off window is traversed a certain number of times, after which the start process is aborted. | 11-25-2010 |
| 20100293919 | DUAL-PUMP FUEL SYSTEM AND METHOD FOR STARTING A GAS TURBINE ENGINE - A dual-pump fuel system for use with a gas turbine engine comprises a fuel metering system, a mechanical fuel pump, an electric fuel pump and an engine controller. The fuel metering system is configured to dispense fuel flow to the engine based on operational needs of the gas turbine engine. The mechanical fuel pump is configured to deliver fuel to the metering system dependent on operational speeds of the engine. The electric fuel pump is configured to deliver fuel directly to the engine independent of operation of the engine. The engine controller is connected to the metering system and the electric fuel pump and is configured to cause the electric fuel pump to deliver fuel to the engine to start and operate the engine until the engine operates the mechanical fuel pump to deliver fuel to the metering system sufficient to sustain operation of the engine. | 11-25-2010 |
| 20100287958 | REFRIGERANT COMPRESSOR - Disclosed is a compressor ( | 11-18-2010 |
| 20100284114 | System and method to provide transient overvoltage suppression - Transient overvoltage suppression circuit prevents voltage surges from damaging an attached load. The suppression circuit includes a transistor connected in series with a low-side or return line of the load. A control circuit monitors the voltage on the input line (i.e., high-side) and in response to a detected voltage transient turns the transistor OFF to isolate the load from the transient voltage. | 11-11-2010 |
| 20100282340 | COMPLIANT CHECK VALVE STOP - A check valve ( | 11-11-2010 |
| 20100278633 | Radial compressor with blades decoupled and tuned at anti-nodes - A gas turbine engine includes a radial compressor with first and second blades. The first and second blades have tuned leading edges that prevent natural frequencies from exciting at speeds within an expected operating speed range. | 11-04-2010 |
| 20100278632 | Radial compressor of asymmetric cyclic sector with coupled blades tuned at anti-nodes - A gas turbine engine includes a radial compressor having first and second blades. The first blade has a tuned leading edge that prevents either blade from exciting at a natural frequency at speeds within an expected operating speed range. | 11-04-2010 |
| 20100270812 | Power Turbine Speed Control Using Electrical Load Following - A power turbine speed control system for a turbo-shaft type gas turbine engine that has a gas generator compressor spool and a power turbine spool and drives an electrical generator that powers at least one electrical load by way of at least one electrical bus, comprises a power turbine controller that senses the rotary speed of the power turbine spool and generates at least one signal that changes the torque of the electrical generator in response to the sensed change in the rotary speed of the power turbine spool. | 10-28-2010 |
| 20100270242 | COMBINED OIL FILTER AND DEBRIS MONITOR - A cyclone separator includes a wall, a first passage, a second passage, and an oil debris monitor. The wall defines a cyclone cavity. The first passage has a first passage inlet positioned in the cyclone cavity and a first passage outlet at an exterior of the cyclone separator. The second passage has a second passage inlet positioned in the cyclone cavity and a second passage outlet at the first passage. The oil debris monitor detects debris flowing through the second passage. | 10-28-2010 |
| 20100264724 | Integrated power until as energy storage device for electrical power system - A power unit connected to a power distribution bus operates in one of several modes to either store excess electrical energy from the power distribution or supply electrical energy to the power distribution bus to account for a detected demand/need. The power unit includes turbomachinery having components connected via a shaft, a generator connected to convert rotational energy associated with the turbomachinery to electrical energy for distribution on the bus, and a motor connected to convert electrical energy distributed by the bus to motive energy used to accelerate the turbomachinery components. A power controller monitors the voltage on the distribution bus. In response to excess voltage on the distribution bus, the power controller connects the motor to the bus to cause the excess electrical energy to be converted to motive energy that is used to accelerate the turbomachinery. In response to a voltage shortage on the distribution bus, the power controller connects the generator to the bus to convert rotational energy stored by the turbomachinery to electrical energy that is supplied to the bus. | 10-21-2010 |
| 20100263847 | MICROCHANNEL HEAT EXCHANGER - Disclosed is a microchannel heat exchanger ( | 10-21-2010 |
| 20100263348 | Additive injection system for improving thermal stability of jet fuel - A gas turbine engine fuel system includes a fuel tank for storing fuel, a heat exchanger through which the fuel from the fuel tank can pass, a fuel pump located downstream from the heat exchanger for pumping the fuel, a fuel metering unit for metering the fuel pumped by the fuel pump, an additive tank for storing a fuel additive, an additive delivery subsystem for mixing the fuel additive with the fuel at or before the heat exchanger to generate a fuel and fuel additive mixture, and a combustor located downstream of the fuel metering unit where the fuel and fuel additive mixture is delivered for combustion. The fuel additive comprises a fuel stabilizer for reducing fuel coking. | 10-21-2010 |
| 20100259099 | SYSTEMS AND METHODS INVOLVING MOTOR DRIVE GROUND FAULT INTERRUPTS - A method comprises determining whether a ground fault on a bus ( | 10-14-2010 |
| 20100230003 | Twin Lubrication Tank Filling System - A twin lubrication oil tank filling system with a single oil fill port that prevents overfilling of both a primary oil tank and a secondary oil with a gravity fill system by directing oil primarily into the secondary oil tank by means of a special oil diverter, a float valve for the secondary oil tank that closes when the oil level in the secondary tank reaches a full level to cause additional oil flow to pour into the primary oil tank and a float valve for the primary oil tank that closes when the oil level in the primary tank reaches a full level. | 09-16-2010 |
| 20100226776 | Sacrificial blade tip - A propeller blade device used in environments where a propeller system is subjected to blade erosion and wear and may also be subjected to an axial force from water. The propeller blade includes a blade tip mounted on its outer end using a mounting device such as nuts and bolts to form a junction there between. The tip may easily be replaced when worn or damaged without removing the blade. The tip is designed to fracture upon impact with an axial force before transmitting the force radially inward to the propeller blade. | 09-09-2010 |
| 20100216628 | ON-BOARD FUEL DESULFURIZATION UNIT - A method for regenerating at least one impurity-adsorbing sorbent bed includes passing impurity-containing fluid through the impurity-adsorbing bed. The impurity-adsorbing sorbent bed adsorbs an impurity in the impurity-containing fluid to produce a purified fluid. A portion of the purified fluid is sent back through the impurity-adsorbing sorbent bed that contains the adsorbed impurity. The impurity-adsorbing sorbent bed is exposed to microwave energy to desorb the impurity adsorbed on the impurity-adsorbing sorbent bed. | 08-26-2010 |
| 20100208393 | IDENTIFICATION AND PROTECTION OF AN AEROSPACE AC-DC POWER SYSTEM IN THE PRESENCE OF DC CONTENT DUE TO FAULTY LOADS - A fault protection system for an AC-DC distribution system detects the presence of DC content at individual loads, isolates the load responsible for the fault from the remainder of the distribution system, and blocks DC content from being propagated from the faulty load to the AC source. The fault protection system includes at least one circuit breaker connected to monitor the AC current provided to the individual electrical load and to detect the presence of DC content indicative of the load being faulty. In response to detected DC content, the circuit breaker trips open to disconnect the electrical load from the AC distribution system to prevent DC content from being propagated to adjacent loads. | 08-19-2010 |
| 20100206532 | Multi-chamber heat exchanger header and method of making - A multi-chamber heat exchanger header includes a header housing and an insert. The header housing has a first wall and a second wall generally opposite the first wall where the first and second walls define a track. The insert is positioned to engage with the track such that the insert separates the header into first and second manifold chambers. A method for forming a multi-chamber heat exchanger header includes extruding a header housing having first and second manifold chambers and a track, positioning an insert in the header housing to engage with the track, and welding or brazing the insert to the header housing. | 08-19-2010 |
| 20100202892 | Thermal protection of rotor blades - A spinner mounting at least one propeller hub and having a blade platform for each hub formed on the spinner body formed from a thermal insulating material capable of withstanding exhaust gasses. The platform is formed in a shape that presents an aerodynamic surface in the direction of travel of the system, preferably at a predetermined effective blade angle so as to act in concert with the blade and the gas path to minimize drag or to optimize thrust. The system may include two sets of propeller blades, and each includes a spinner and blade platform. | 08-12-2010 |
| 20100201127 | THERMALLY OPERATED ROTATABLE COMPONENT RESTRAINT SYSTEM - A turboalternator system includes a turboalternator having a rotatable member operatively engaged to a bearing set, a radial support element, and a contact structure engaged with the radial support element. The rotatable member defines a first end, a second end and an axis of rotation. The turboalternator system is configured to be thermally adjustable such that in a first thermal condition the contact structure is at a first radial position with respect to the axis of rotation and contacts the rotatable member to provide support, and in a second thermal condition the contact structure is at a second radial position with respect to the axis of rotation that is spaced further from the axis of rotation than the first radial position. The contact structure includes a ring having a groove formed in an outer diameter surface thereof, and the radial support element engages the groove in the contact structure. | 08-12-2010 |
| 20100195948 | Separator for bearing assemblies with cyclic loads - A bearing assembly includes first and second races, a plurality of ball bearings positioned between the first and second races, and a spacer positioned between each of the ball bearings. The spacers each include a body defining opposite first and second sides, a first substantially concave pocket located at the first side of the body, and a second substantially concave pocket located at the second side of the body. The first and second substantially concave pockets each define a central region having a first radius of curvature about a first center point and an outer region adjacent to the central region that has a second radius of curvature about a second center point. The first and second center points are spaced from one another, and the body includes a portion extending in between at least the respective central regions of the first and second substantially concave pockets. | 08-05-2010 |
| 20100175689 | Catalyzed hot gas heating system for pipes - A heating system for heating a fluid pipe in an industrial process system includes at least one gas tank fluidically connected to a first catalyst via a gas supply pipe. A first pipe heating zone is fluidically connected to the first catalyst via a first hot gas pipe. The first pipe heating zone has at least one passage extending along a first portion of the fluid pipe, in thermal contact with the fluid pipe. | 07-15-2010 |
| 20100175687 | Catalyzed hot gas heating system for concentrated solar power generation systems - A solar power generation system includes a fluid housing, a solar collector, and a heating system. The fluid housing contains a heat transfer medium. The solar collector concentrates solar energy onto the heat transfer medium. The heating system includes at least one gas tank containing a gas and fluidically connected to a first catalyst. The first catalyst is configured to catalyze gas from the gas tank to create hot gas. The heating system also includes a first hot gas pipe fluidically connected to the first catalyst and positioned with respect to the fluid housing such that hot gas flowing through the first hot gas pipe comes into thermal contact with the heat transfer medium within the fluid housing. | 07-15-2010 |
| 20100170500 | AIR DRYING SYSTEM FOR CONCENTRATED SOLAR POWER GENERATION SYSTEMS - An air drying system for use in a concentrated solar power generation system using a fluid heat transfer medium includes a first vent pipe and a first desiccant pack. The first vent pipe extends from the concentrated solar power generation system and includes a first inlet open to ambient air, and a first outlet open to an interior of the solar power generation system in fluid communication with the fluid heat transfer medium. The first desiccant pack is positioned within the first vent pipe between the first inlet and first outlet and is positioned to reduce moisture content of ambient air flowing into the first vent pipe. | 07-08-2010 |
| 20100170498 | AIR INSTRUMENTATION SYSTEM FOR CONCENTRATED SOLAR POWER GENERATION SYSTEMS - An air quality instrumentation system for a concentrated solar power generation system using a fluid heat transfer medium includes a pipe, a window and a spectroscope. The pipe extends from the concentrated solar power generation system and contains system air from within the concentrated solar power generation system. The window is positioned within the pipe to permit light to pass through the pipe and the system air. The spectroscope is positioned adjacent the window to assess concentration of a constituent within the system air, the concentration of the constituent providing an indication of an operating condition of the concentrated solar power generation system. | 07-08-2010 |
| 20100170188 | Lifting system for solar power tower components - A lifting assembly for a solar power tower includes a track, a cable, and a winch. The track extends longitudinally from the tower top to the tower base. The winch is located at the tower top and anchors the cable that extends toward the tower bottom adjacent the track. A component attached to the track and to the cable is guided along the track by the winch spooling or unspooling the cable. | 07-08-2010 |
| 20100167863 | Coupling for generator/starter - A coupling system includes a dynamoelectric device selectively operable as either a generator or an electric motor, a gas turbine engine, a main differential operably connected between the dynamoelectric device and the gas turbine engine, a rotationally powered accessory engaged with the main differential, an epicyclic start differential operatively connected to the main differential, and a brake mechanism. The brake mechanism is configured for selectively braking the epicyclic start differential when the dynamoelectric device operates as an electric motor to direct torque transmission to the gas turbine engine, and is further configured to cease braking the epicyclic start differential when the dynamoelectric device operates as a generator such that the main differential transmits torque to power the rotationally powered accessory and to the dynamoelectric device. | 07-01-2010 |
| 20100156360 | Eddy current torsional damper for generator - A generator rotor torsional damper system includes a prime mover for generating rotational force, a generator stator, a generator rotor rotatably supported relative to the generator stator and configured to receive a rotational force input from the prime mover, a flywheel rotationally supported relative to the generator rotor by bearings, and an eddy current coupling operably connected between the flywheel and the generator rotor such that rotation of the generator rotor induces rotation of the flywheel in a common rotational direction through engagement by the eddy current coupling. | 06-24-2010 |
| 20100156113 | Generator coupling for use with gas turbine engine - A generator coupling assembly includes an output housing, an output member rotationally supported by the output housing, a generator powered by the output member, and a clutch adapter. The generator includes a generator stator, a generator rotor rotatably supported within the generator stator, a shaft coupled to the generator rotor, and a clutch member arranged on the shaft. The clutch adapter is coupled to and radially retained by the output member, and includes a clutching structure configured for selective engagement with the clutch member to engage the clutch member and the clutch adapter for co-rotation. | 06-24-2010 |
| 20100151272 | COATING PROCESS FOR FATIGUE CRITICAL COMPONENTS - A coating process for fatigue critical components is provided. The coating process comprises the steps of providing a substrate having a first modulus of elasticity, depositing a layer of a material having a second modulus of elasticity less than the first modulus of elasticity onto the substrate, and depositing a coating over the material layer. | 06-17-2010 |
| 20100091422 | LIGHTNING STRIKE MIGITATION FOR AIRCRAFT - A lightning mitigation system for use on an aircraft employs parasitic capacitance associated with a motor/generator to dissipate voltage provided as a result of a lightning strike. The motor/generator includes a set of windings defined by an outer periphery and a case that surrounds the set of windings. A parasitic capacitance is defined by the airgap separating the windings of the motor/generator from the case. A motor controller is electrically connected to the set of windings and includes a filter circuit. The filter circuit includes an equivalent capacitance that is selected based on the parasitic capacitance associated with the motor/generator such that a lightning strike results in a large portion of the voltage being dissipated by the parasitic capacitance of the motor/generator. | 04-15-2010 |
| 20100078061 | Solid state heat pipe heat rejection system for space power systems - A heat rejection system includes a plurality of panel subassemblies and a solid state heat pipe flex joint. Each panel subassembly includes a fin, a solid state heat pipe manifold, a first solid state heat pipe tube operatively connected to the solid state heat pipe manifold and secured to the fin, a second solid state heat pipe tube operatively connected to the solid state heat pipe manifold adjacent to the first solid state heat pipe and secured to the fin. The solid state heat pipe flex joint operably connects the solid state heat pipe manifolds of two of the plurality of panel subassemblies in a hermetically sealed configuration, and is configured to permit repositioning of the two panel subassemblies relative to each other. | 04-01-2010 |
| 20100072930 | NEGATIVE SEQUENCE CARRIER SIGNAL CONTROLLER - A negative sequence feedback circuit is connected to monitor and minimize unbalances in a high-frequency ac carrier signal provided to a motor/load for the purpose of detecting rotor position. The negative sequence feedback circuit detects unbalances in the high-frequency ac carrier signal and generates negative sequence feedback. The feedback is combined with command signals used to generate the high-frequency ac carrier signal, and the combination of the command signals with the negative sequence feedback is provided to an inverter for generation of the high-frequency ac carrier signal, wherein the negative sequence feedback reduces unbalances in the resulting high-frequency ac carrier signal such that a balanced high-frequency carrier signal is provided to the motor/load. | 03-25-2010 |
| 20100065541 | PROPELLER DEICING SYSTEM - Systems and methods of deicing aircraft propellers include a deicing heater timing cycle, i.e. heater on/heater off schedule that is calculated as a function of ambient temperature and the airspeed of the aircraft. | 03-18-2010 |
| 20100054005 | RECTIFIER ASSEMBLY - A rotating rectifier includes diode subassemblies that each have an AC contact between two diodes, held in place by a spring clip or interference fit between an inner DC bus and an outer DC bus. The outer DC bus can also act as a housing and heat sink. Diodes and resistors are distributed around the rotating rectifier. Zener diodes can be included in series with the resistors to provide further protection to the diodes to ensure proper operation of the rectifier. | 03-04-2010 |
| 20100052467 | Transverse flux machine - A transverse flux machine (TFM) includes a stator assembly that provides a plurality of U-shaped magnetic circuits placed circumferentially around a rotor assembly. The plurality of U-shaped magnetic circuits being comprised of a first stator segment, a second stator segment, and a plurality of stator yokes. The first stator segment and the second stator segment each have a plurality of poles spaced around a first circumference and a plurality of slots spaced around a second circumference opposite each of the plurality of poles. The plurality of stator yokes each have a first end sized to fit within one of the slots associated with the first stator segment and a second end sized to fit in one of the slots associated with the second stator segment. Positioning of the first and second ends of the stator yokes within the slots of the first and second stator segments, respectively, results in the creation of the plurality of U-shaped magnetic circuits, each magnetic circuit defined by one of the plurality of poles associated with the first stator segment, one of the yokes, and one of the plurality of poles associated with the second stator segment. | 03-04-2010 |
| 20100045108 | Power conversion architecture with zero common mode voltage - A controller for a power conversion system reduces common-mode voltage generated by the power conversion system by imposing a constraint on the control signals applied to the power conversion system. The power conversion system includes a plurality of switching devices that are responsive to control signals provided by the controller to selectively connect each output of the power conversion system to one of a plurality of inputs. The controller generates control signals based on a desired output of the power conversion system. In addition, the controller imposes a constraint on the control signals to reduce the common-mode voltage. The constraint is defined by assigning an integer value to each input of the power conversion system, and requiring that the selective connection of outputs to inputs must result in a sum of integer values equal to zero. | 02-25-2010 |
| 20100040471 | Method of manufacturing a turbine rotor - A method for joining a cast metal material blade ring and a metal material hub structure into a turbine rotor. One of the blade ring and the hub structure is mounted in a holder and the other is mounted in a rotation holder for being rotated. At least one of these mountings is heated, and then they are pressed together with a selected force while rotating to weld the ring interior wall and the disk side to form the assembled structure. | 02-18-2010 |
| 20100039120 | Hardware in the loop motor simulation - A simulator system is connected to simulate the connection of a mechanically loaded motor to a motor controller/driver. The simulator system includes a current transformer circuit for monitoring AC output currents provided by the motor controller/driver. A simulation controller calculates, based on the monitored AC output currents, dynamic load voltages that simulate the response that would be generated by a mechanically loaded motor based on the AC output currents provided by the motor controller/driver. A number of power supplies amplify the dynamic loading calculated by the simulation controller to generate a dynamic loading that opposes the AC output currents provided by the motor controller/driver. | 02-18-2010 |
| 20100038493 | High gain asymmetry brake - An asymmetry brake includes a housing, a shaft, a pilot brake, a primary brake, and a ball ramp assembly. The shaft of the asymmetry brake is rotatable relative to the housing about an axis of rotation. The primary brake is movably connected with the shaft. The pilot brake is configured to selectively engage the housing to generate a triggering torque. The triggering torque is transferred through the ball ramp assembly to the primary brake, which in response engages the housing to generate a braking torque on the shaft. The disposition of the ball ramp assembly between the pilot brake and the primary brake allows the ball ramp assembly to return to an operative non-separated condition when the pilot brake is disengaged from the housing. The return of the ball ramp assembly to the operative non-separated condition allows the primary brake to disengage from the housing which releases the shaft to rotate. | 02-18-2010 |
| 20100034003 | Electric Power Generation and Conversion with Controlled Magnetics - A power conversion system comprises: a source of multiphase high frequency alternating current (AC) electrical input power; a high frequency controlled magnetics transformer for each phase of the multiphase high frequency AC input power, with each transformer having a primary winding coupled to its respective phase of the multiphase high frequency AC input power, at least one secondary winding that produces high frequency AC output power and at least one control winding responsive to a direct current (DC) control signal that changes the high frequency output power in proportion to the amplitude of the DC control signal; a power converter that receives the multiphase high frequency AC output power from each high frequency transformer secondary and converts it to system output power without the high frequency AC content; and a system controller responsive to the system output power that produces a DC control signal for each control winding that changes in amplitude in response to changes in a measured parameter of the system output power. | 02-11-2010 |
| 20100033893 | PRINTED WIRING BOARD FEED-THROUGH CAPACITOR - A feed-through capacitor is constructed in a printed wiring board using alternating layers of metal capacitive layers and plastic dielectric layers of the printed wiring board. The large number of layers, the avoidance of ceramic layers and the flexible geometry of this device allow it to be used in many applications, particularly in those involving high power high current. Also, because it utilizes a printed wiring board, the capacitor can be made in numerous sizes and shapes. | 02-11-2010 |
| 20100021304 | Blade pitch actuation mechanism - A blade pitch actuation mechanism for a plurality of propeller blades supported in a blade hub comprises a plurality of bearing assemblies, a bearing support plate and a yoke. The plurality of bearing assemblies receives a plurality of actuation trunnion pins from the plurality of propeller blades. The bearing support plate is connected to the plurality of bearing assemblies and unifies the plurality of bearing assemblies in a ring-like configuration. The yoke is connected to the bearing support plate and translates within the hub to adjust the pitch of the plurality of propeller blades. | 01-28-2010 |
