Class / Patent application number | Description | Number of patent applications / Date published |
290031000 | Starting and generating dynamo | 75 |
20080303280 | ENGINE START SYSTEM WITH QUADRATURE AC EXCITATION - A starter-generator system may be used to supply sufficient starting torque to start an aircraft main engine. The main starter-generator stator winding may be connected to a constant frequency (CF) power source to create a rotating field in the main starter-generator air gap. This rotating field, in turn, may induce current on the main rotor winding, which may be a closed circuit formed by main rotor field winding and exciter armature winding. The interaction between the main rotor current and the air gap flux may give rise to the starting torque to start the main engine. Adjusting the voltage supplied to the exciter stator field winding can modify the induced voltage and current on the rotor circuit to control the rotor current and starting torque. The starter-generator system may also be used to start an aircraft main engine by directly connecting the main stator winding to a power source without powering the exciter stator. | 12-11-2008 |
20080315583 | Hybrid Propulsion System For a Watercraft - A propulsion system for a watercraft is described, having a diesel engine ( | 12-25-2008 |
20090091132 | STARTER/GENERATOR SYSTEM WITH CONTROL TO ADDRESS A VOLTAGE RISE - A control circuit for a generator has a control function that monitors the voltage across a bus capacitor. The circuit delivers excess voltage back to associated stator windings if an unduly high voltage is detected across the bus capacitor. | 04-09-2009 |
20090140521 | GENERATOR POWER-BASED COLD START STRATEGY - The method of the invention controls engine speed during engine starting for a hybrid electric vehicle that includes a battery, an engine and a generator, acting as a motor, whereby generator torque assists the engine to develop a stable running speed throughout an engine start event, particularly a cold engine start event, without violating battery power limits. | 06-04-2009 |
20100001523 | POWER SUPPLY CONTROL APPARATUS AND METHOD FOR HYBRID VEHICLE - When the temperature of an engine and a main battery is low at the time of activating a vehicle system, an ECU starts the engine in advance and outputs a running permission signal after completion of engine startup. At this stage, the ECU suspends a defect diagnosis operation on a subsidiary load and feedback-controls the DC/DC converter by setting the voltage control value to a level lower than the output voltage from the subsidiary battery and at least the lower limit of the operating voltage of the ECU. The ECU feedback-controls the DC/DC converter by setting the voltage control value to a level of at least the output voltage of the subsidiary battery in response to completion of engine start-up. Then, the suspension of the defect diagnosis operation on the subsidiary load is canceled and a running permission signal is output. | 01-07-2010 |
20100001524 | Electric rotary starter for an engine of a radio control model - An electric rotary starter for an engine of a radio control model includes a motor mounted therein. A drive shaft is electrified and longitudinally connected to the motor and rotated by the motor. A conduct tube is electrified and movably sleeved on the drive shaft, wherein the conduct tube is insulated from the drive shaft. When starting the engine, the drive shaft is longitudinally inserted into the engine for providing torsion. Simultaneously, the conduct tube is longitudinally moved relative to the drive shaft to make the front end of the conduct tube contract with the engine. The conduct tube and the drive shaft from a circuit and the power from the electric rotary starter is transmitted to the spark plug in the engine to make the spark plug sparkle for starting engine. | 01-07-2010 |
20100013222 | ELECTRIC ENGINE START WITH TWO MOTORS AND SINGLE MOTOR DRIVE - An electrical starter-generator system includes a first starter-generator and a second starter-generator. A single drive controls both the first starter-generator and the second starter-generator such that their electrical current and power inputs are minimized and balanced. | 01-21-2010 |
20100013223 | HYBRID ENGINE INSTALLATION AND A METHOD OF CONTROLLING SUCH AN ENGINE INSTALLATION - A hybrid engine installation ( | 01-21-2010 |
20100109325 | Method and device for power regulation of an underwater power plant - The invention concerns a method for the operation of an underwater power plant with | 05-06-2010 |
20100213709 | GENERATOR-STEAM TURBINE-TURBOCOMPRESSOR STRING AND METHOD FOR OPERATING THE SAME - A generator-steam turbine-turbocompressor-string is provided. The generator-stream turbine-turbocompressor-string includes a generator with variable frequency, a steam turbine and a turbocompressor which can be driven by the generator and/or the steam turbine. The generator and the steam turbine are coupled together to a shafting, wherein the generator may be electrically coupled to an electrical power supply system for power supply feeding and the steam turbine may be connected to a live steam feeding device for the feeding of live steam to the steam turbine, such that the generator-steam turbine-turbocompressor-string has a rotational speed which is controllable by varying the power supply feeding and/or by the live steam feeding. | 08-26-2010 |
20100283242 | High Voltage Start of an Engine from a Low Voltage Battery - Method and system are disclosed for starting a high voltage engine using a starter permanent magnet motor. The starter motor is powered using a DC power source remote from the starter motor. A bidirectional DC-to-DC converter local to the DC power source is used to produce a variable high voltage variable frequency power for driving the starter motor, and is remotely controlled to produce a controlled output current level. During generate mode the DC-DC converter may be used to charge the battery. | 11-11-2010 |
20100283243 | METHOD FOR CONTROLLING A SELF-PILOTED ALTERNATOR-STARTER, INCLUDING A SHORTENED PREFULX STEP - A method for controlling a self-piloted alternator-starter for starting or restarting the thermal engine of an automobile. The alternator-starter includes a rotor rotating in a stator, and a belt for transmitting the torque of the alternator-starter rotor to the crankshaft of the thermal engine. The method includes a first preflux step during which the rotor winding is excited by a preflux electric current, and a second starting step during which the stator windings are excited. The preflux step lasts from 10 to 100 ms so that the transmission belt is tensioned below a degradation tension at the start of the second starting step. | 11-11-2010 |
20100295300 | METHOD FOR CONTROLLING A REVERSIBLE ELECTRICAL MACHINE COUPLED TO A HEAT ENGINE, ENGINE SUITABLE FOR CARRYING OUT THE METHOD, AND USE THEREOF - The invention relates to a method for controlling a reversible electrical machine ( | 11-25-2010 |
20100295301 | AIRCRAFT ENGINE STARTING/GENERATING SYSTEM AND METHOD OF CONTROL - A starting and generating system for use with an aircraft engine includes a starter/generator and an inverter/converter/controller (ICC) coupled to the starter/generator. The starter/generator is configured to start the aircraft engine in a start mode and to generate AC power in a generate mode. The starter/generator includes an exciter and a rotational shaft. The ICC is configured to provide AC power at a first frequency the starter/generator in the start mode and to control the exciter during the generate mode such that the generate mode AC power has a second frequency, wherein the first frequency is based on a shaft speed of the shaft. | 11-25-2010 |
20100308581 | POSITION-CONTROLLED START FROM THE AC LINE USING A SYNCHRONOUS MACHINE - A synchronous electric machine operates as a starter-generator for an aircraft. When operating in a starting mode, a main stator of the machine is supplied with electrical power at a constant frequency. An exciter stator is supplied with variable frequency power. As rotational speed increases, the exciter variable frequency changes correspondingly to maintain synchronous operation of the machine and maximum torque. In a generator mode, variable frequency is applied to the exciter stator with the exciter frequency varying as a function of rotational speed of an engine driving the machine. This provides for a constant frequency output from the machine. | 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 |
20110049880 | IDLE-STOP RESTART CONTROL SYSTEM - The idle-stop restart control system includes: a sensorless synchronous motor-generator which operates as a generator and a starting motor; an induced-signal detecting circuit for detecting an induced signal output from an armature winding; a field drive circuit for controlling energization of a field winding; and a restart control circuit output, to the field drive circuit, a drive signal for controlling the energization of the field winding to amplify the induced signal while calculating the number of revolutions and an angular position of a rotor based on the detected induced signal when an engine stop command is input and a level of the detected induced signal is equal to or less than a predetermined value and output the drive signal for controlling the energization of the armature winding to restart the engine based on the calculated number of revolutions and angular position of the rotor when a restart command is input. | 03-03-2011 |
20110049881 | METHOD AND DEVICE FOR THE SECURED CONTROL OF AN ALTERNATOR-STARTER ASSEMBLY COUPLED TO THE THERMAL ENGINE OF A VEHICLE, AND CORRESPONDING ALTERNATOR-STARTER ASSEMBLY AND WIRE LINKS - An electric control unit is used to generate control signals for the alternator-starter assembly on the basis of first information signals representative of a state of the vehicle and a control unit is used to generate control signals for power circuits on the basis of diagnosis signals representative of the state of the alternator-starter assembly. The control signals are generated using the electronic control unit also on the basis of at least one first diagnosis signal, and control signals are generated using the control circuit also on the basis of second information signals from a data communication bus. | 03-03-2011 |
20110062709 | CIRCUIT AND METHOD FOR REDUCING A VOLTAGE BEING DEVELOPED ACROSS A FIELD WINDING OF A SYNCHRONOUS MACHINE - In an electrical power system of a diesel powered system having at least one diesel-fueled power generation unit, the electrical power system configurable in a starting mode for cranking the diesel fueled power unit, the electrical power system having a synchronous machine coupled to the diesel-fueled power generation unit, the synchronous machine having a field winding connected in a parallel relationship with a current conditioner, a method for reconfiguring a baseline circuit topology of the electrical power system for controlling a voltage being developed across the field winding including uncoupling the field winding from the parallel relationship with the current conditioner, and coupling the field winding in a series relationship with the current conditioner. | 03-17-2011 |
20110080000 | SYNCHRONOUS ELECTRICAL MACHINE - A synchronous electrical machine comprises a plurality of phases and detecting means arranged to detect an open-circuit fault in at least one of the phases of the synchronous electrical machine. Isolating means is arranged to isolate the at least one phase of the synchronous electrical machine with the fault. Phase shift means are arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine so as to adjust the phase angle of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero to eliminate torque ripple. The phase shift means is arranged to adjust the phase angle of all the remaining phases by the same predetermined angle to maximise the torque ripple-free power output of the synchronous electrical machine. | 04-07-2011 |
20110227340 | ELECTRICAL MACHINES WITH INTEGRATED POWER AND CONTROL AND INCLUDING A CURRENT SOURCE INVERTER - A machine has a housing that includes a plurality of stator coils to be positioned adjacent to a rotor. A switching network includes a plurality of transistors and diodes connected to the coils. A current source inverter is provided by a switching network, a pair of inductors positioned on power rails, and commutating capacitors. The current source inverter and the coils are all positioned within said housing. Power architecture for a vehicle has a source of DC power, which communicates with machines through integrated motor drives. The motor drives include at least three coils positioned adjacent to the rotors for a motor associated with the integrated motor drive. A storage switching network is positioned downstream of the coils, with the storage switching network to be closed to allow power from the coils to drive the rotor, or to be opened to allow power to pass to a local storage component. | 09-22-2011 |
20110227341 | METHOD AND DEVICE FOR MONITORING THE START TIME OF A HEAT ENGINE OF A VEHICLE - A method and device for controlling the starting time of a vehicle mounted thermal engine coupled mechanically to a polyphase rotary electrical machine with an inductor. The electrical machine includes phase windings and sensors for the position of a rotor, and is connected to an on-board electrical network. The method uses pre-fluxing by establishing an excitation current in the inductor for a predetermined pre-fluxing time, before establishment of phase currents. These phase currents are controlled by signals phase-shifted by an angle which varies according to a speed of rotation of the electrical machine, relative to synchronisation signals produced by the sensors. During the starting time, the angle of phase-shifting is additionally dependent on a voltage of the on-board electrical network, in a range contained between a first and second voltages, with the second voltage being higher than the first. In the method, the starting time is independent from the voltage of the on-board electrical network. | 09-22-2011 |
20110260452 | POWER SUPPLY SOURCE SWITCHING APPARATUS FOR HYBRID ENGINE GENERATOR - Usability is improved and noise and fuel consumption are lowered by preventing stopping of a generator output. A hybrid power generator | 10-27-2011 |
20120007360 | STARTING METHOD FOR BRUSHLESS WOUND FIELD STARTER-GENERATOR WITHOUT ROTATING DIODE RECTIFIER - A starting system may comprise a wound-field electric machine with a main generator and an exciter generator. The main generator and the exciter generator may each have stator windings and rotor windings. A shorting switch may be provided for interconnecting the stator windings of the exciter generator together when power is applied to stator windings of the main generator. This may result in starting torque being produced by the exciter generator, which starting torque may be additive to starting torque produced by the main generator. | 01-12-2012 |
20120032441 | CRANK-WEB MOUNTED LINEARLY SEGMENTED STARTER GENERATOR SYSTEM - Featured is a starter/generator to start a reciprocating engine or generate electrical energy using the engine. The starter/generator includes a plurality of magnetic elements that establish a magnetic flux, each magnetic element being attached to a surface of the crankshaft so the element moves in a prescribed path as the crankshaft rotates; a plurality of stator elements being arranged within the engine so as to be maintained in fixed relation to a corresponding magnetic element as it moves in the prescribed path, and control circuitry being configured and arranged to control the functionality of each stator element. In one mode a stator element is controlled so that movement of the magnetic element by the stator element cause electrical energy to be generated in the respective stator element and so in another mode each stator element/magnetic element combination operates the motor/generator as a motor. | 02-09-2012 |
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 |
20120169050 | SYSTEM AND METHOD FOR OFF-HIGHWAY VEHICLE ENGINE CRANKING - Methods and systems are provided for operating an engine, the engine coupled to a traction alternator for vehicle travelling. In one example, the method includes, in an off-highway vehicle running mode of operation, supplying current from the traction alternator to a traction motor via a traction inverter to propel the vehicle, and, in a starting mode of operation, supplying stored energy from a first energy source and a secondary energy source to the traction alternator to start the engine. | 07-05-2012 |
20120193913 | control device for an electric machine and method for the operation thereof - An electronic control device for a starter-generator or a starter for an internal combustion engine in a motor vehicle has a control and a circuit configuration that includes a pulse-controlled inverter. The control device includes the pulse-controlled inverter, the corresponding control, and a DC/DC converter in one structural unit. | 08-02-2012 |
20120211980 | SYSTEM AND METHOD FOR DETERMINING CONDUCTIVE STATE OF A SOLID STATE SEMICONDUCTOR DEVICE - A system, in one embodiment, may include a static starter subsystem having detection logic for indicating a conductive state of a solid state semiconductor device. The detection logic includes a first logic gate having a first input that receives a first input signal indicating a state of the static starter subsystem, a second input that receives a second input signal indicating a state of a gate firing command being applied to the solid state semiconductor device, and a third input that receives a third input signal indicating whether the solid state semiconductor device is conducting. The first logic gate may be configured to evaluate the first, second, and third input signals and provide a first output signal indicating conductivity of the solid state semiconductor device in response to the gate firing command. | 08-23-2012 |
20120211981 | TURBINE ENGINE STARTER/GENERATOR, AND METHOD FOR THE CONTROL THEREOF - A turbine engine starter-generator including a main electrical machine including a stator and rotor with a wound rotor inducer and damper bars forming a cage, and an exciter including a stator inducer and rotor with rotor windings connected to the rotor inducer of the main electrical machine via a rotary rectifier. During a first starting stage, the electrical machine operates in asynchronous motor mode by injecting AC into its stator windings, a starting torque being generated by the damper bars, without the rotor inducer of the main electrical machine contributing significantly to generating starting torque. Then in a second starting stage, the main electrical machine operates in synchronous motor mode by injecting AC into its stator windings, while feeding its rotor inducer with DC via the exciter, the change from the first stage to the second stage taking place when rotation speed of the shaft reaches a predetermined value. | 08-23-2012 |
20120261916 | POWER-GENERATION MOTOR CONTROL SYSTEM - A power-generation motor control system is a control system that controls a power-generation motor provided with an armature and a magnetic-field winding, and is characterized in that when the power-generation motor is operated as a motor, before a power source energizes the armature, a preliminary excitation current, with the value of which the induction voltage across the armature does not exceed the voltage of the power source, is applied to the magnetic-field winding in accordance with the rotation speed of the power-generation motor so that preliminary excitation of the power-generation motor is performed. | 10-18-2012 |
20120292902 | INVERTER GENERATOR - In an inverter generator having a winding wound around a generator unit driven by an engine, a converter connected to the winding and adapted to convert an alternating current outputted from the winding to a direct current, an inverter connected to the converter and adapted to invert the direct current outputted from the converter to an alternating current and output it, and a controller adapted to control operations of the converter and the inverter, a battery is connected to the engine, and the winding includes a first winding and a second winding, such that the controller supplies an output of the battery to one of the first winding and the second winding to rotate the generator unit to start the engine. | 11-22-2012 |
20130001944 | STARTING METHOD/APPARATUS FOR SERIES ELECTRIC DRIVE - An improved system and method for starting an engine of an electric drive machine is disclosed. The method includes supplying electric current from a first energy storage device to inductive windings of a propulsion motor. The method also includes accumulating energy in the inductive windings of the propulsion motor based on a magnetic field created when the supplied electric current flows through the inductive windings. Electrical energy is generated by regulating a first plurality of switches associated with a first inverter to cause a collapse of the accumulated energy in the inductive windings. Such electrical energy is stored in an energy storage device. A controller regulates a second plurality of switches associated with a second inverter to cause a release of the stored electrical energy. The released electrical energy is supplied to a generator to start the engine. | 01-03-2013 |
20130033038 | STARTING/GENERATING SYSTEM WITH MULTI-FUNCTIONAL CIRCUIT BREAKER - A starting/generating system includes a rotor portion and a stator portion. The stator portion is connected to a DC power source during starting operations and to a DC load during generating operations, and includes a DC link having a first and second DC link bus, a DC link capacitor connected between the DC link buses, and an inverter/rectifier that converts AC power to DC power and vice versa. A switching device is connected in series on the first DC link bus and is controlled by a controller that turns the switching device On and Off to provide various functionality to the starting/generating system. | 02-07-2013 |
20130038057 | GAS TURBINE ENGINE APPARATUS - A gas turbine engine arrangement comprises a core engine, a power turbine and a propulsor. The core engine comprises at least one compressor and at least one turbine arranged to drive the at least one compressor and the core engine is arranged in a casing. The power turbine is positioned downstream of the at least one turbine and the power turbine is arranged to drive the propulsor. An electrical machine is arranged upstream of the at least one compressor. The electrical machine comprises a stator and a rotor and the electrical machine comprises a motor/generator. A first clutch selectively connects the rotor of the electrical machine to the power turbine and a second clutch selectively connects the rotor of the electrical machine to the at least one compressor of the core engine. | 02-14-2013 |
20130099493 | CONTROL APPARATUS FOR MOTOR-GENERATOR - A control apparatus for a motor-generator includes a stator including multi-phase coils, a rotor, a multi-phase inverter one arm of which includes a switch element and a free-wheeling element, and a power supply connected between a neutral point of the coils and a negative electrode of the inverter. When the switch elements are driven by rectangular wave, the low-side switch element connected to the high-side switch element is subject to PWM switching control while the high-side switch element is off. When a time point, at which the high-side switch element is turned off, is defined as a base point, if α is defined as a time when switching of the low-side switch element starts, and β is defined as a time when the switching ends, β-α is 120 degrees in electrical degree or more, α is more than 0 degrees, and β is less than 180 degrees. | 04-25-2013 |
20130140816 | POWER SUPPLY SYSTEM FOR MOTOR VEHICLE - A power supply system for a motor vehicle is provided with: a generator that includes a rotor having a field coil and a stator having an armature coil; a rectifier that rectifies AC power generated in the armature coil; an excitation control circuit that takes control of a voltage applied to the field coil; a capacitor that is connected to the DC side of the rectifier, and receives and transfers the rectified power; a battery connected to an electric load of the motor vehicle; a DC-DC converter that is connected between the capacitor and the battery and capable of converting unidirectionally or bidirectionally an input DC voltage into any DC voltage; and a selection switch capable of selecting as a power supply source for the excitation control circuit either the capacitor or the battery. | 06-06-2013 |
20130249213 | GAS TURBINE START WITH FREQUENCY CONVERTOR - The invention relates to a method for the start of a power plant installation ( | 09-26-2013 |
20140103650 | DUAL-DC BUS STARTER/GENERATOR - A system includes a starter/generator that receives AC power in a start mode, and generates AC power in a generate mode; and an inverter/converter circuit that converts the generated AC power from the starter/generator to DC power for a dual-DC bus during the generate mode, and converts DC power to AC power for the starter/generator during the start mode, wherein the inverter/converter circuit denies power flow from the dual-DC bus to the starter/generator during the generate mode. | 04-17-2014 |
20140132002 | VEHICLE POWER SOURCE DEVICE - A vehicle power source device includes a battery, a charging circuit, a capacitor, a switch, a voltage detection circuit, a current detection circuit, a control circuit, and a recording unit. The charging circuit is connected to the battery and the capacitor. A first terminal of the switch is connected to the positive electrode of the capacitor, a second terminal is connected to the positive electrode of the battery, and a third terminal is connected to a starter. The voltage detection circuit is connected in parallel to the capacitor, and detects capacitor voltage Vc. The current detection circuit is connected between the charging circuit and the positive electrode of the capacitor, and detects the capacitor charge current Ic. The control circuit is connected to the charging circuit, the switch, the starter, the voltage detection circuit, the current detection circuit, and the recording unit. | 05-15-2014 |
20140239637 | AUTOMATIC VEHICLE STOP RESTART SYSTEM - An electrical system for vehicles that connects multiple batteries in parallel during normal operation but isolates the cranking battery and the starter system from the other batteries and their loads when the engine is started. A common charging system simultaneously maintains all of the batteries. Efficiency and EMC considerations are addressed in the design. | 08-28-2014 |
20140265327 | Systems and Methods for Variable Speed Operation of Combustion Engines - Certain embodiments of the disclosure may include systems and methods for variable speed operation of combustion engines. According to an example embodiment of the disclosure, a method is provided for controlling the operation of the combustion engine. The method can include providing power from a power source to a converter; providing frequency variable power to a generator from the converter; accelerating the generator and associated turbine to a predetermined speed by modulating the frequency variable power from the converter; after a predetermined turbine speed is achieved, disconnecting power supplied to the generator by the converter; and modulating subsequent operation of the generator using power from the converter. | 09-18-2014 |
20140361536 | CHARGING IN MULTIPLE VOLTAGE START/STOP BAS SYSTEM - An alternator-starter system and method is disclosed. A method of operating an alternator-starter having an inverter/rectifier for starting an engine and charging a plurality of batteries includes providing two switches for each battery, monitoring voltages of each of the plurality of batteries, and switching the switches to selectively charge individual ones of the plurality of batteries. A system includes a plurality of batteries connected in series, and includes first and second switches for each battery, the first switch being operable to switchably connect the upper rail of the inverter/rectifier with the respective (+) terminal, the second switch being operable to switchably connect the lower rail of the inverter/rectifier with the respective (−) terminal. A high voltage configuration may be utilized for motoring and generating modes. | 12-11-2014 |
20150097372 | THREE PHASE FLUX SWITCHING GENERATOR IN A THREE STAGE WOUND FIELD SYNCHRONOUS MACHINE - A brushless, three phase wound field synchronous machine (WFSM) provides an electromechanical power transfer system wherein it may serve as both a starter and a generator. Power for the excitation system of the WFSM is provided by a three phase flux switching generator (FSG). The three phase FSG also provides position sensor functionality for the WFSM when the WFSM operates in the starter/motor mode. | 04-09-2015 |
20150130186 | CONTROL AND POWER SUPPLY SYSTEM FOR HELICOPTER TURBINE ENGINES - An electrical control and power supply system for at least one helicopter motor/generator, the system including a first DC/AC converter selectively delivering AC electrical power to the at least one motor/generator, depending on respective positions of contactors of a connection matrix actuated from an electronic control circuit, the first DC/AC converter powered with DC by a DC power supply device that includes either a circuit for rectifying an AC voltage delivered via a contactor by a starter/generator of an APU, or a voltage booster DC/DC converter powered from a battery via a contactor. The connection matrix further includes a contactor connecting the first DC/AC converter in parallel with the second DC/AC converter to make it possible, once at least one of the motors/generators has started, to inject additional power from the starter/generator of the APU. | 05-14-2015 |
20150337737 | STARTER/GENERATOR COMBINATION WITH ALL VARIABLE FREQUENCY DRIVES - A gas turbine engine includes a compressor, a combustor adjacent the compressor, a turbine adjacent the combustor, a shaft, a motor, a primary variable frequency drive, an auxiliary variable frequency drive, and an auxiliary motor. The motor is coupled to the shaft. The primary variable frequency drive is electrically connected to the motor and an AC power source. The auxiliary variable frequency drive is electrically connected to the primary frequency drive. The auxiliary motor is electrically connected to the auxiliary variable frequency drive. | 11-26-2015 |
20150377203 | MULTIPLE VOLTAGE SYSTEM AND METHOD - An alternator-starter system is coupled with an engine and includes an electric machine, an inverter/rectifier, a plurality of batteries, a plurality of switches and at least one controller. The switches are operable to connect the plurality of batteries in series or in parallel. The batteries are connected in series to supply a torque to the engine to start the engine and, under at least some conditions, the batteries are connected in parallel to charge the batteries. The batteries may also be individually charged or charged in series. In some embodiments, when the rotational speed of the electric machine exceeds a first threshold, the system is operated in the generating mode with the batteries being connected in parallel until a larger second threshold is exceeded and the batteries are connected in series. A method of operating an alternator-starter system is also disclosed. | 12-31-2015 |
20160006377 | ELECTRIC DRIVE VEHICLES - An electric drive vehicle which is capable of performing a bidirectional voltage conversion between two DC power supplies and a rotary electric machine, and a connection switch between a series connection and a parallel connection of the two power supplies with respect to the rotary electric machine. The electric drive vehicle can supply electric power without a delay in response to a change in a load request. A controller sets the connection between the two power supplies to the parallel connection when an estimated value of an output electric current in accordance with a torque command to the rotary electric machine exceeds a tolerable electric current value of at least one of the two power supplies. | 01-07-2016 |
20160039371 | POWER CONVERTER, GENERATOR AND ARCHITECTURE FOR HIGH EFFICIENCY AUXILARY POWER UNIT - A high efficiency multifunction power system for an aircraft is provided. The system includes an AC generator and a multifunction power converter-controller module including at least one multifunction power converter-controller. The at least one multifunction power converter-controller is configured to function as a power converter and a controller to perform multiple operation modes. | 02-11-2016 |
20160040642 | POWER SUPPLY FOR VEHICLE - There is provided a power supply for a vehicle, including a generator, a lead battery, an electric storage device that is connected in parallel to the lead battery and to the generator, a starter circuit that has a capacitor and a starter and is connected in parallel to the lead battery and to the generator, and at least two switches of a first switch connected in series to the lead battery, a second switch connected in series to the power supply, and a third switch connected in series to the starter circuit. | 02-11-2016 |
20160061173 | SYSTEM AND METHOD FOR DETERMINING HEALTH OF AN ENGINE-GENERATOR SET - The present disclosure is directed to systems and methods for determining health of an engine-generator set of a hybrid power system having at least one battery power source. For example, in one embodiment, a battery management system sends a start-up command to the engine-generator set. After sending the command, at least one start-up condition (e.g. a start-up time lapse, a start-up voltage parameter of a starter battery of the engine-generator set, or a voltage of the battery power source before sending the start-up command) is determined for the hybrid power system. Next, a start-up condition trend is generated based on a plurality of the start-up conditions over multiple start-ups. Thus, the engine-generator set health can be determined based on a comparison of the start-up condition trend and a threshold start-up condition for the engine-generator set. | 03-03-2016 |
20160065106 | AIRCRAFT ENGINE AND METHOD FOR OPERATING AN AIRCRAFT ENGINE - An aircraft engine includes at least one electrical apparatus, which can be driven by a driveshaft in order to generate electrical energy. A hydrodynamic torque converter, with guide blades, which can be adjusted via a mechanism, is arranged between the driveshaft and the electrical apparatus. The guide blades are adjusted as a function of a rotational speed of the driveshaft, wherein the rotational speed of a shaft of the electrical apparatus operated as a generator can be adjusted, essentially within a predefined rotational speed range, via the adjustment of the guide blades. | 03-03-2016 |
20160065107 | METHOD FOR STARTING AN INTERNAL COMBUSTION ENGINE WITH THE AID OF A BELT-DRIVEN STARTER GENERATOR - A method for starting an internal combustion engine using a starter generator to which the engine is connected via a belt drive, the belt drive including a belt pulley of the starter generator, a belt pulley of the internal combustion engine, and a belt connecting the belt pulleys in a torque-transmitting manner, includes operating the starter generator such that its drive torque output to the belt pulley of the starter generator is according to a drive torque curve by which an output torque generated temporarily on the belt pulley of the internal combustion engine exceeds the drive torque of the starter generator, taking a gear ratio of the belt drive into consideration. | 03-03-2016 |
20160090959 | NINE PHASE INDUCTION MOTOR STARTER/ALTERNATOR - An electrical induction motor may include nine terminals configured to receive nine current inputs from nine output phases of a nine phase inverter. The motor may include nine windings connected to the nine terminals, and a plurality of contactors, wherein each of the plurality of contactors may be selectively opened or closed in a circuit including the nine windings to selectively connect the windings together in one of a mesh configuration or a star configuration. Each of the windings may be selectively connected between two of the nine current inputs, with a phase angle difference between the two current inputs of 40 degrees. Each of the contactors may be selectively opened or closed to establish a span value for the mesh configuration of two, with two being the number of inverter output phases between a terminal of one of the nine windings and a terminal of another of the nine windings connected to the one of the nine windings. The motor may selectively receive a first one of the harmonics of a drive waveform generated by the nine phase inverter and a second, different one of the harmonics of the drive waveform generated by the nine phase inverter. | 03-31-2016 |
20160090960 | MULTIPHASE INDUCTION MOTOR WITH CONFIGURABLE WINDINGS - An electrical induction motor includes a plurality of windings, and a plurality of contactors. Each of the plurality of contactors is configured to be selectively opened or closed in a circuit including the plurality of windings to selectively connect the windings together in a star configuration wherein current flowing through the windings results in the generation of 2N magnetic poles, with N equal to the number of phases of the motor. Each of the plurality of contactors is also configured to be selectively opened or closed in the circuit including the plurality of windings to selectively connect the windings together in a mesh configuration wherein current flowing through the windings results in the generation of two magnetic poles. | 03-31-2016 |
20160101699 | SYSTEM AND METHOD FOR REDUCING FUEL CONSUMPTION IN A VEHICLE - A drive system includes an engine, an alternator coupled to the engine, the alternator being configured to power at least one auxiliary load, a traction motor system operatively coupled to drive wheels of the vehicle, the traction motor system being configured for receiving primary electrical power from the alternator and for propelling the vehicle in response to the primary electrical power, and a motor electrically connected to the traction motor system and mechanically coupled to the engine. The motor is configured to receive electrical power from the traction motor system in a dynamic braking mode of operation of the traction motor system and to communicate power to the engine during the dynamic braking mode. | 04-14-2016 |
20160102644 | POWER GENERATION UNIT, AND MOTOR GENERATOR CONTROL METHOD - A power generation unit includes a motor generator having a rotor with magnet, and a stator with coils driven in a plurality of phases, the coils of the respective phases not being connected to each other; and a driving control part that performs control so that a coil of each phase of the stator is brought into any one of a first state in which torque is generated by the rotor, a second state in which both ends of the coil are electrically released, and a third state in which both ends of the coil are short-circuited. | 04-14-2016 |
20160169184 | VEHICLE HAVING A BELT PULLEY AND STANDSTILL AIR-CONDITIONING | 06-16-2016 |
20160186711 | METHOD AND DEVICE FOR CONTROLLING AN ALTERNATOR-STARTER OF A MOTOR VEHICLE, AND CORRESPONDING ALTERNATOR-STARTER - The method according to the invention is implemented in an alternator-starter ( | 06-30-2016 |
20170234234 | GAS TURBINE ENGINE MOTORING SYSTEM FOR BOWED ROTOR ENGINE STARTS | 08-17-2017 |
20170234235 | ELECTRO-PNEUMATIC GAS TURBINE ENGINE MOTORING SYSTEM FOR BOWED ROTOR ENGINE STARTS | 08-17-2017 |
20180026568 | AIRCRAFT STARTING AND GENERATING SYSTEM | 01-25-2018 |
20180026569 | CONTROL DEVICE FOR POWER CONVERSION DEVICE, POWER CONVERSION DEVICE, ELECTRIC MOTOR DRIVE SYSTEM USING SAID DEVICES, COMPRESSOR DRIVE SYSTEM, AND GAS TURBINE POWER GENERATION SYSTEM | 01-25-2018 |
20190145371 | Direct Current Power Plant | 05-16-2019 |
290032000 | With generator | 4 |
20090066084 | Enhanced Electrical Power Supply Systems with Induction Generators and Related Methods of Operation - This invention is directed to enhanced electrical power supply systems with induction generators and related methods of operations. The invention is an enhanced prime mover system capable of converting the exergies of the prime mover system into energy input for the prime mover system to increase the overall efficiency of the prime mover and the overall efficiency of a generator. The enhanced prime mover system may enable a more economic generator system with greater flexibility of implementation. | 03-12-2009 |
20100133813 | Systems and Methods for Providing AC Power from Multiple Turbine Engine Spools - Systems and methods for providing AC power from multiple turbine engine spools are disclosed. A system in a particular embodiment includes a turbofan engine having a compressor, a first turbine and a first shaft connected between the compressor and the first turbine, and a fan, a second turbine and a second shaft connected between the fan and the second turbine. The system can further include a state power bus and a first energy converter coupled between the first shaft and the power bus, with the first energy converter including a starter/generator, and being positioned to convert a first variable frequency energy transmitted by the first shaft to a first generally constant frequency energy. A second energy converter can be coupled between the second shaft and the power bus, with the second energy converter including a generator and being positioned to convert a second variable frequency energy transmitted by the second shaft to a second generally constant frequency energy, with the second generally constant frequency energy in phase with and at generally the same frequency as the first generally constant frequency energy. A controller can be operatively coupled to the starter/generator and the generator, e.g., to control the functions of these devices. | 06-03-2010 |
20160126740 | POWER PLANT - A power plant, in particular a genset, comprising an internal combustion engine and a main generator drivable by the internal combustion engine, wherein the main generator is electrically connected to a power grid, the power plant further comprising an auxiliary generator drivable by the internal combustion engine, wherein a voltage connector of the auxiliary generator is connected with a first alternating voltage connector of a voltage converter, wherein a direct voltage connector of the voltage converter is connected with an electrical energy storage, wherein a second alternating voltage connector of the voltage converter is connected to the power grid. | 05-05-2016 |
20160185205 | VEHICLE POWERTRAIN - A powertrain includes an engine and an electrical circuit having a motor-generator and a starter mechanism coupled to the engine. A first energy storage device is disposed in a parallel electrical relationship with the starter mechanism. A second energy storage device is disposed in a parallel electrical relationship with the motor-generator. A first auxiliary electric system is disposed in a parallel electrical relationship with both the first energy storage device and the second energy storage device. A first switch is disposed within the electrical circuit between the first energy storage device and the first auxiliary electric system. A second switch is disposed within the electrical circuit between the second energy storage device and the first auxiliary electric system. The first auxiliary electric system is disposed, within the electrical circuit, between the first switch and the second switch. | 06-30-2016 |
290034000 | Engine control | 7 |
20080315584 | Engine start system with a regulated permanent magnet machine - An electromechanical power transfer system that transfers power between a direct current (DC) electrical power system and a prime mover, comprises: a permanent magnet machine (PMM) comprising a permanent magnet (PM) rotor that rotates a drive shaft of the prime mover, a stator with a multiphase alternating current (AC) winding coupled to the AC bus for developing a rotating magnetic field with a magnetic flux path that causes rotation of the PM rotor and a control coil with a winding that has a configuration to generate a magnetic field with flux that varies the reactance of the stator winding upon the application of current through the control coil; a plurality of AC current sensors for sensing the current in each phase of the multi-phase AC bus and generating respective AC bus current signals that represent the current level of each phase; an average current detector that receives the AC bus current signals and generates a respective current load feedback signal; a back electromotive force (emf) detector coupled to the AC bus that detects back emf generated by the stator in response to the application of AC power to the stator and generates a back emf signal representative of the detected level of back emf; a rotor position/speed estimator that receives the back emf signal and generates an estimated rotor position signal that is representative of the position of the rotor, an estimated rotor speed signal that is representative of the speed of the rotor and a closed loop enable signal that indicates a speed for the electrical starting system to switch from an open loop mode of operation to a closed loop mode of operation; a control coil current sensor for generating a control coil current signal in a control coil current feedback loop that is representative of the level of electrical current in the control coil; a first speed switch that switches between an open loop position reference signal that represents a desired position of the rotor in an open loop mode and the estimated rotor position signal that represents the position of the rotor in a closed loop mode to provide a position reference signal; a second speed switch that switches between an open loop current reference signal that represents a desired control coil current level in the open loop mode and a closed loop current reference signal that represents a desired control coil current level in the closed loop mode to provide a control coil current reference signal; an inverter/rectifier system for converting DC power from the DC power system to multiphase alternating current (AC) power on an AC bus; a control coil current regulator system for regulating current through the control coil; wherein the inverter/rectifier system responds to the position reference signal, the current load feedback signal and a current load reference signal to regulate acceleration of the PMM; wherein the control coil current regulator system responds to the control coil current reference signal and the control coil current feedback signal to regulate current in the PMM; and wherein the power transfer system starts in the open loop mode, the rotor position/speed estimator generates the closed loop enable signal that indicates a speed for the electrical starting system to switch from the open loop mode of operation to the closed loop mode of operation at a predetermined rotor speed, and the first and second speed switches respond to the closed loop enable mode to switch from their open loop mode to their closed loop mode. | 12-25-2008 |
20090091133 | METHOD TO RE-ENGAGE START OF DYNAMOELECTRIC MACHINE - A method of starting a gas turbine engine with a synchronous multiphase alternating current (AC) dynamoelectric machine with a rotor and a stator that allows re-engagement of a starting operation at non-zero rotor speeds comprises the steps of: applying electrical excitation to the rotor; measuring electromotive force (EMF) generated in the stator; determining rotor speed, acceleration and position from the measured EMF by sensorless means; initiating closed-loop sensorless position controlled power to the stator if the determined rotor speed is at least a pre-determined minimum closed-loop sensorless re-engagement speed; initiating open-loop position controlled power to the stator if the determined rotor speed is less than the pre-determined minimum closed-loop sensorless re-engagement speed but at least a predetermined minimum open-loop re-engagement speed and the determined rotor acceleration is no more than a pre-determined maximum open-loop re-engagement acceleration; and initiating open-loop zero-speed start power to the stator if the determined rotor speed is less than the predetermined minimum open-loop re-engagement speed. | 04-09-2009 |
20110215575 | Electrical Generator - An electrical generator utilizing two internal combustion engine having an expanded range of power output is disclosed. A primary internal combustion engine is coupled to the magnet rotor assembly. The primary engine is operated solely in a lower power range. A secondary engine, coupled to a coil assembly is locked in place in such lower power range to make the coil assembly stationary. In a higher power range, that overlaps the lower power range, the secondary engine is unlocked and operated to rotate in a counter-rotating direction with respect to the first engine. The secondary engine can be started by operating the generator (consisting of the magnet rotor assembly and the coil assembly) as a motor by appropriate application of current. | 09-08-2011 |
20120313372 | METHOD AND SYSTEM FOR START AND OPERATION OF AN ELECTRICALLY DRIVEN LOAD - A method and system for starting and operating an electrically driven load, e.g. a compressor or pump, by power supply from a mechanical driver, e.g. a turbine or combustion engine, whereby the load is mechanically connected to a first electrical machine, and the mechanical driver is mechanically connected to a second electrical machine. The first electrical machine is electrically interconnected to the second electrical machine at a standstill or when the first and or second machine have low speed. In an acceleration phase, the first electrical machine is accelerated by accelerating the second electrical machine with the mechanical driver. When the first electrical machine has reached a predefined rotational speed, the first machine is synchronized with a local electrical power network and connected it to that network. | 12-13-2012 |
20130076035 | MOTOR-GENERATOR TURBOMACHINE STARTER - An exemplary turbomachine starter assembly includes a motor-generator that selectively operates in a motor mode or a generator mode. The motor-generator provides a rotational input to a turbomachine when operating in the motor mode. The motor-generator generates a supply of electrical power when operating in the generator mode. The supply of electrical power is used to power accessories of the turbomachine. | 03-28-2013 |
20130147192 | GAS TURBINE ENGINE TRANSIENT ASSIST USING A STARTER-GENERATOR - A method of supplying mechanical power to an operating gas turbine engine includes supplying mechanical power from the operating gas turbine engine to a starter-generator, to thereby generate electrical power using the starter-generator. One or more operational parameters of the operating gas turbine engine are sensed and, based on the one or more sensed operational parameters, electrical power is selectively supplied to the starter-generator to thereby generate and supply mechanical output power to the operating gas turbine engine. | 06-13-2013 |
20140291987 | ENGINE ARCHITECTURE USING ELECTRIC MACHINE - There is described a method for controlling an engine and a system architecture for an engine. The system architecture comprises a first electric machine having a single rotor dual stator configuration for operating as a starter-generator for the engine; a second electric machine having a single rotor dual stator configuration for operating as a motor; a dual channel motor drive unit coupled to the second electric machine; a dual channel power control unit coupled to the first electric machine and the motor drive unit; a dual channel full authority digital engine control (FADEC) coupled to the dual channel power control unit and the dual channel motor drive unit; and at least two accessories coupled to the second electric machine and driven by motive power from the single rotor of the second electric machine. | 10-02-2014 |