Class / Patent application number | Description | Number of patent applications / Date published |
322028000 | Voltage of generator or circuit supplied | 76 |
20080231240 | HIGH VOLTAGE PROTECTION FOR A THIN OXIDE CMOS DEVICE - A circuit includes a voltage regulator ( | 09-25-2008 |
20080238373 | FAST FIELD DISCHARGE FOR GENERATOR OVER-VOLTAGE CONTROL - A voltage regulator for controlling over-voltage conditions in an electrical generator by rapidly discharging the generator field winding current into a discharge resistor upon the detection of the over-voltage. A field discharge transistor is switched by a soft switching circuit to direct the generator field winding current to the discharge resistor. A hysteresis circuit detects when a point of regulation voltage exceeds a first threshold triggering the discharge of the generator field winding current. The hysteresis circuit also detects when the point of regulation voltage goes below a second lower threshold and triggers the field discharge transistor to bypass the discharge resistor and return to a normal mode. | 10-02-2008 |
20080258692 | Zero crossing detection for an electric power generation system - One system of the present application includes an electric power generation device structured to provide an AC electric power output at a target frequency. This device includes: an electric power generator; a sensing arrangement structured to provide samples corresponding to magnitude of the AC electric power output; and a controller including operational logic responsive to the sensing arrangement to calculate a peak amplitude as a function of a waveform period corresponding to the target frequency and two of the samples separated in time by a target duration of 20 to 30 percent of the waveform period and determine a zero crossing of the output from the peak amplitude and the target frequency. The operating logic is further structured to control operation of the device in accordance with the zero crossing. | 10-23-2008 |
20080265845 | Specially improved automotive replacement voltage regulator - This device is A Specially Improved Automotive Replacement Voltage Regulator for use in the automotive components remanufacturing and original equipment alternator product. Particularly this device has additional transient suppression means for the loads; “high side drive” of the rotor field to eliminate corrosion from the low side short condition; full passivation around the monolithic chip; and a monolithic chip that contains both the power and control devices which permits a simplified heat sink for thermal dissipation. | 10-30-2008 |
20080278120 | GENERATOR CONTROL SYSTEM AND METHOD AND VEHICLE INCLUDING SAME - An internal combustion engine, battery and charging system therefore including a generator particularly adapted for use in straddle ridden vehicles and wherein the charging system for the battery and operating electrical accessories of the engine wherein the charging is regulated in response to sensed conditions of the engine operation and the electrical devices therefor. | 11-13-2008 |
20080284386 | Control Device for Vehicle Ac Generator - A highly reliable control device for an AC generator without using a transistor and diode having high withstand voltage is provided. | 11-20-2008 |
20080290843 | WIDE SPEED RANGE ELECTRIC POWER GENERATION SYSTEM USING HIGH REACTANCE PERMANENT MAGNET MACHINE - A device and method for controlling the output of a wide speed range high reactance permanent magnet machine based PGS is provided. The windings of a permanent magnet machine are coupled to a three-phase diode bridge. A transistor is used for temporarily short-circuiting said diode bridge. A capacitor smoothes the voltage at a voltage detection point. A control unit generates a signal that switches the transistor in response to a voltage detected at the voltage detection point. The control unit signal modifies the duty cycle of the switching of the transistor in response to variations in the speed of the power generator to maintain a desired voltage at the voltage detection point. | 11-27-2008 |
20090021224 | VOLTAGE REGULATOR FOR MAGNETOGENERATORS WITH CONFIGURABLE CONNECTION OF THE PHASE WINDINGS - The voltage regulator receives power in A.C. from a permanent magnet voltage generator, having phase windings with a configurable connection, to supply power in D.C. to a battery. The voltage regulator comprises a plurality of semi-bridge rectifiers connected between the terminals of the phase windings of the voltage generator, and a battery power supply terminal; it also comprises a control circuit designed to change over the connection of the phase windings between two different configurations, for example star and delta, in relation to the charging voltage of the battery upon exceeding a threshold value of the phase frequency of the voltage generator. | 01-22-2009 |
20090058374 | HIGH EFFICIENCY ALTERNATOR - A high efficiency alternator capable of supplying extreme high power output with maximum dissipation of heat. Preferably, the alternator includes dual field coils mounted stationary around a common shaft and dual brushless rotors. The alternator may also include three or more phases, and uniquely wound stator assemblies. The alternator may also include dual, three-phase bridge-type rectifiers and dual voltage regulators. All electrical components are preferably redundant. Air cooling through the interior perimeter of the alternator is preferably provided to cool the housing. | 03-05-2009 |
20090134845 | Device for Controlling an Electricity Generator Set - The present invention relates to a control device ( | 05-28-2009 |
20090134846 | ENERGY SUPPLY SYSTEM AND ENERGY SUPPLY METHOD FOR VEHICLE SUBSYSTEMS - An energy supply system for electrical actuator of a motor vehicle having a engine and battery includes a generator adapted to be driven by the vehicle engine to provide electrical energy to the electric actuator and vehicle battery. A control unit sets an input power provided to the generator by the vehicle engine and is configured to set the output voltage of the generator based on a power request associated with the electric actuator. A method for supplying electrical energy to a vehicle subsystem may be performed using an energy supply system as disclosed. | 05-28-2009 |
20090153105 | Alternator - The present invention relates to an alternator comprising: | 06-18-2009 |
20090167257 | SHORTED ROTATING DIODE DETECTION AND PROTECTION - An electric generator with a rotating diode fault detection device built in that operates by comparing a voltage buildup across the exciter DC supply with a preset threshold value and determining if a fault condition is present based on the comparison. | 07-02-2009 |
20090195224 | Digital Excitation Control System Utilizing Self-Tuning PID Gains and an Associated Method of Use - A system and method for self-tuning a PID controller utilized with an exciter and generator, which includes a power source, an exciter electrically connected to the power source, a generator that is electrically energized by the exciter, and a processor that provides a PID controller that calculates system gain an estimated exciter time constant and an estimated generator time constant with a recursive least square with forgetting factor algorithm, wherein the estimated exciter time constant and the estimated generator time constant are utilized to calculate PID gains by the processor, wherein the processor includes a random input generator that is summed with the output of the PID controller as input to determine the PID gains using the estimated exciter time constant and the estimated generator time constant and the processor compares a digital value of rms generator voltage against a reference voltage as input into the PID controller. | 08-06-2009 |
20090206801 | CONTROL APPARATUS FOR IN-VEHICLE AC GENERATOR - Power-generation control operation for an in-vehicle electric generator is further stabilized in such a way that, in the case where a signal at an external-control-signal input terminal changes, a function of on/off-controlling a magnetic-field current in a constant cycle is interrupted. In a control apparatus, for an in-vehicle electric generator, that has a function of adjusting a generation voltage to a predetermined voltage, by on/off-controlling a magnetic-field current in a constant cycle, and variably controlling an adjustment voltage, based on an input signal from an external control unit, in the case where a signal at an external-control-signal input terminal is fixed for a long time, the function of on/off-controlling the magnetic-field current in the constant cycle is activated, and in the case where the signal at the external-control-signal input terminal changes, the function of on/off-controlling the magnetic-field current in the constant cycle is interrupted. | 08-20-2009 |
20090218991 | METHOD AND APPARATUS FOR REGULATING EXCITATION OF AN ALTERNATOR - A hybrid voltage regulator controls the voltage of three phases of alternating electricity produced by an alternator. A digital voltage regulator produces an average of the RMS voltage for each phase and produces an error value based on a ratio of the voltage to the frequency of the alternating electricity. The RMS voltage average and the error value are used to modify a voltage command designating a desired voltage level. The modified voltage command is processed by an analog voltage regulator that rectifies the alternator output voltage which then is averaged over an period of time. The resultant average voltage value is utilized to modify the voltage command to produce a regulated voltage command that determines a level of current to apply to excite the alternator. | 09-03-2009 |
20090237038 | DOUBLE ALTERNATOR AND ELECTRICAL SYSTEM - A double alternator system includes a first brushless winding assembly to generate a first electrical voltage, a second winding assembly to generate a second electrical voltage, a rotatable shaft common to the first brushless winding assembly and second winding assembly to cause generation of a first electrical voltage and second electrical voltage upon rotation of the shaft, and a housing in which the winding assemblies are disposed and through which the first and second electrical voltages are carried to respective first and second electrical output contacts. | 09-24-2009 |
20090243560 | Pulse-position-modulated vehicular alternator voltage regulator with dual AC-feedback networks, controlled "OFF" period and low inserted electrical noise - A Frequency-On-Demand type voltage regulator firstly has its power output circuit configured as a resettable monostable multivibrator that provides (1) a stable time-base that serves as an internal “OFF”-period reference; preferably also with (2) short-circuit protection to the output power transistor; and (3) a pulse train with sharply defined “ON” and “OFF” transitions as the result of the interaction between the Output and Input Stages of the Power Output Circuit through a first AC Feedback Network. The “ON” and “OFF” transitions are preferably rounded-off. Secondly, yet another, second, AC feedback network is added between the Output Stage of the Power Output Circuit and the Error-Detector/Voltage Divider Stage of the Frequency-On-Demand type voltage regulator. This second feedback network provides (1) a controlled “OFF”-period synchronized with the Output Stage signal; (2) protection against loss of a reference voltage; (3) a dead band” associated with the “ON” and “OFF” periods that confers exceptional tolerance to system electrical noise; and (4) a voltage compensation feature with “flat”, “drooping” or “rising” system voltage output characteristic versus system loading. | 10-01-2009 |
20090322290 | REGULATED HYBRID PERMANENT MAGNET GENERATOR - A permanent magnet rotor for an electrical generator has pole pieces with permanent magnets. A control coil is associated with the pole pieces. A current flow through the coils is controlled to achieve a desired output voltage at an output for the generator. | 12-31-2009 |
20100013443 | REGULATION CONTROL FOR VARIABLE FREQUENCY GENERATORS - A variable frequency generator regulation control circuit and method for controlling open loop gain under changing generator speed conditions employing a high frequency pulse-width modulated signal with a duty cycle that is controlled such that variations in rectified PMG voltage and generator gain over the generator speed range can be compensated for. This signal is modulated by a low frequency pulse-width modulated signal provided by the generator regulator, using a logic gate to produce a combined signal representing an average voltage signal applied to a generator field winding as the generator speed fluctuates. | 01-21-2010 |
20100039074 | SMART ALTERNATOR - An alternator an electronic voltage pre-regulation circuit adapted for incorporation into a drill string is provided and includes: a plurality of n-phase generators for providing alternating current (AC), wherein the AC of each generator is rectified to a direct current (DC) voltage using a respective rectifier to provide a DC power supply, and each DC power supply is arranged in series for being one of connected and disconnected from an output of the alternator. A method and a drill string are provided. | 02-18-2010 |
20100079117 | Field transient suppression system and method - A vehicle electrical system comprises a generator, voltage regulator, electrical energy source, and control device. The generator provides electrical current to one or more electrical loads. Voltage transients from electrical load variations are suppressed by storing electrical energy of the field coil of the generator in the electrical energy source, and by proving electrical energy from the electrical energy source to the field coil. The control device comprises a controller and a charging module operative to maintain the voltage of the electrical energy source at a predetermined voltage that is above the regulation voltage so as to reduce the generator output voltage transients due to sudden variations in the one or more electrical loads. | 04-01-2010 |
20100117605 | METHOD OF AND APPARATUS FOR OPERATING A DOUBLE-FED ASYNCHRONOUS MACHINE IN THE EVENT OF TRANSIENT MAINS VOLTAGE CHANGES - The invention relates to a method and a device for operating an asynchronous motor ( | 05-13-2010 |
20100117606 | DISTRIBUTED GENERATION SYSTEM AND POWER SYSTEM STABILIZING METHOD - A distributed generation system that can suppress a voltage fluctuation caused by a distributed generation by an apparatus of a small power capacity in the distributed generation itself and stabilize the power system voltage without inserting interharmonic voltage or current into the power system and without interference among a plurality of distributed generations. Parameter α(t) varying with time is estimated based on fluctuating component ΔP of the active power P generated by the distributed generation and the voltage fluctuating component ΔV attributable to the distributed generation developed at the point of connection between the distributed generation and power system. The distributed generation produces reactive power Q=−αP or Q=−αΔP, to thereby suppresses only the voltage fluctuation of the power system attributable to the distributed generation. | 05-13-2010 |
20100201329 | SYSTEM AND METHOD FOR DIRECTLY AND INSTANTANEOUSLY CONTROLLING EXCITER OF GENERATOR - A system for directly and instantaneously controlling the exciter of a generator. A voltage error calculator calculates a voltage error of output voltage of the generator which is regulated by an instruction voltage and a time constant. A switching signal generator generates switching signals in response to the voltage error. An exciter controller controls the exciter in response to the switching signals. Thus, the system can induce the maximum response characteristic of a power converter only by setting the time constant of a controller without a complicated design for determining gains of the controller. Further, the system can considerably inhibit overshoot from occurring in a transient response state. | 08-12-2010 |
20100231180 | Alternator Regulator With Automatic Regulation Dependent on System Voltage - An alternator configured for use in a vehicle comprises a stator having a plurality of stator windings. A rotatable field coil is positioned adjacent to the stator within the alternator. A field driver circuit is configured to deliver an electric current to the field coil. A voltage sensor is configured to detect a battery voltage. A controller in the alternator is configured to execute either a first field current control program or a second field current control program depending at least in part upon the detected battery voltage. The first field current control program is configured to control the electric current delivered to the field coil in a 12 volt vehicle power system. The second field current control program is configured to control the electric current delivered to the field coil in a 24 volt vehicle power system. | 09-16-2010 |
20100244787 | Control Parameter Adaptation Dependent on Rotational Speed - Disclosed are a method and an arrangement for controlling the output voltage of a generator arrangement. | 09-30-2010 |
20100295516 | METHOD AND DEVICE FOR REGULATING A POLYPHASE ROTATING ELECTRICAL MACHINE OPERATING AS A GENERATOR, AND POLYPHASE ROTATING ELECTRICAL MACHINE USING THEM - The regulating method is employed in a polyphase rotating electrical machine operating as a generator and having an excitation coil ( | 11-25-2010 |
20110018504 | System and method for generator phase signal monitoring and control - A vehicle electrical system comprises a generator and a control device coupled with the generator and operable to protect the generator from catastrophic failure while providing the electrical load in the electrical system with sufficient electrical power. The control device determines a loss of symmetry between two alternating phase signals generated by a first and second phase windings of a single or multiple stator generator. In particular, the control device determines a first and second average values of two of the two or more alternating phase signals and either limits or ceases the total electrical output current of the generator, via a generator output power controller, when the first average value differs from the second average value by a predetermined value. The control device may alternatively be configured to generate an error signal without varying the generator's total electrical output current even in the event of a malfunction. | 01-27-2011 |
20110057630 | Vehicular Alternator, and Rectifier of Vehicular Alternator - A rectifier of vehicular alternator that rectifies AC electrical power into DC electrical power comprises: a rectifier that includes a plurality of MOS FETs that are used as rectifier elements; a control circuit that applies drive signals to the gates of the plurality of MOS FETs via gate drive signal lines, and that thereby commands continuity and discontinuity of the plurality of MOS FETs; and a plurality of load circuits, one connected between the gate and the source of each of the MOS FETs, for bleeding down electric charge accumulated by gate capacitance of the MOS FET if the gate drive signal line is interrupted. | 03-10-2011 |
20110068752 | OUTPUT CONTROL APPARATUS OF GENERATOR - A generator ( | 03-24-2011 |
20110074366 | PERMANENT MAGNET GENERATOR HAVING PASSIVE FLUX CONTROL - A permanent magnet generator assembly has a permanent magnet generator with magnetic flux control windings, a passive rectifier, and a passive control element. The passive control element electrically connects an output of the passive rectifier to the magnetic flux control windings. | 03-31-2011 |
20110089910 | OUTPUT VOLTAGE CONTROL APPARATUS OF GENERATOR - When a distortion of an output waveform of an alternating-current generator is improved, an output voltage control apparatus of a generator, which has versatility, is obtained. An output voltage control apparatus of a generator ( | 04-21-2011 |
20110101930 | POWER SUPPLY DEVICE - A power supply device comprising: a magneto generator including a rotor including a magnet forming a magnetic field; a rectifying unit rectifying an alternating current of the generator to a direct current and supplying to an electrical load; a voltage detection unit detecting a voltage of the electrical load; an opening unit interrupting electrical conduction of an output of the generator; short-circuiting units electrically short-circuiting the output; a torque supplying device supplying torque to the rotor; a voltage control unit selectively performing one of opening-control of controlling on/off switching of the opening unit and short-circuit-control of controlling on/off switching of the short-circuiting units to control the voltage of the electrical load to a predetermined value in accordance with the voltage detected by the voltage detection unit; a switching control unit switching and controlling between the above two controls in accordance with an operating state regarding rotation of the rotor. | 05-05-2011 |
20110148366 | VEHICLE AC GENERATOR - Provided is a vehicle AC generator for improving working efficiency in assembly, allowing a reduction in the number of components, and the like. The vehicle AC generator includes: a rectifier for rectifying an AC generated by a stator coil into a DC; and a regulator for regulating an AC voltage generated by the stator coil, in which: the regulator includes: a regulator holder; a regulator main body provided inside the regulator holder, the regulator main body being for regulating the AC voltage; a capacitor provided inside the regulator holder, the capacitor being for absorbing a noise generated when the AC is rectified into the DC by the rectifier; and an insulating resin material filling the regulator holder so as to fix the regulator main body and the capacitor. | 06-23-2011 |
20110148367 | POWER GENERATION AMOUNT CONTROL APPARATUS - The power generation amount control apparatus includes a battery state determination section, a generator performance determination section, a power-generation-amount increase determination section, an idle state determination section, and a power generation restriction control section. The power generation restriction control section is configured to perform power generation restriction control to restrict a power generation amount of a vehicle generator driven by a vehicle engine when the idle state determination section determines that the vehicle engine is in the idle state, the power-generation-amount increase determination section determines that the power-generation-amount increase demand is not present, and the battery state determination section determines that the battery charged by the vehicle generator is not deteriorated. | 06-23-2011 |
20110215773 | VEHICLE GENERATOR - The vehicle generator includes an armature winding, a switching section constituted as a bridge circuit including a plurality of pairs of an upper arm and a lower arm to rectify phase voltages of the armature winding, each of the upper and lower arms being constituted of a switching element parallel-connected with a diode, and a control section for controlling on/off timings of the switching elements. The control section is configured to perform switching operation to switch the switching section between a first operation state where each upper arm is turned off when the phase voltage is higher than a voltage of a vehicle battery, and a second operation state where each upper arm is turned off after the phase voltages becomes lower than the battery voltage, and configured to delay off timings of the switching elements stepwise when the switching section is in the second operation state. | 09-08-2011 |
20110234178 | METHOD AND DEVICE FOR REGULATION OF A ROTARY ELECTRICAL MACHINE FOR A MOTOR VEHICLE - A rotary electrical machine regulation device of the type which can control the electrical machine using a predetermined set value of a direct voltage (B+) of the on-board electrical network of the vehicle in which the machine is installed. An excitation current (EXC) is supplied to the alternator (machine), and has a duty cycle (RC) which is determined by a digital processing block ( | 09-29-2011 |
20110241631 | Device for detecting a change in a generator output signal of a vehicle generator - A device for detecting a change in a generator output signal of a vehicle generator includes a window comparator for comparing a signal amplitude of the generator output signal to at least one threshold value which limits a signal amplitude range, a detector for detecting a change in the generator output signal based on an output signal of the window comparator, a detection unit for detecting a signal amplitude difference between a maximum signal amplitude and a minimum signal amplitude of the generator output signal, and an adaptation unit for adapting the signal amplitude range of the window comparator, based on the signal amplitude difference, when there is the change in the generator output signal. | 10-06-2011 |
20110260696 | CONTROL DEVICE FOR VEHICLE AC GENERATOR - A control device for a vehicle AC generator which restricts an upper limit of a field current to the maximum field current at a set voltage even when a power generation voltage becomes large, is obtained. In the control device for the vehicle AC generator, in which a DC voltage obtained by rectifying an AC output voltage of an armature coil in the AC generator with a rectifier is applied to a field coil to obtain a field current and the field current is controlled by ON/OFF of a switching element connected in series to the field coil, an upper limit restriction unit in which an upper limit of on-duty of the switching element is set to a set voltage/the DC voltage, is included. | 10-27-2011 |
20110260697 | CONTROL DEVICE FOR VEHICLE AC GENERATOR - In order to receive a power generation command from the outside of a body, to transmit power generation control condition with respect to the power generation command to the outside, and to enable a vehicle to drive properly depending on the condition; a minimum value selector by which on-duty of a switching element by the power generation command inputted from the outside of the body of a control device is compared to on-duty of the switching element calculated inside the body of the control device and smaller on-duty of both on-duties is selected to perform ON/OFF control of the switching element is included, and the selected on-duty is transmitted to the outside. | 10-27-2011 |
20110273147 | Electric Tap in a Voltage Regulator Circuit - In one aspect of the present invention, a voltage regulator circuit comprises at least one coil disposed around a rotor coupled to a first rectifier. The coil comprises an electric tap connected to a second rectifier. The first rectifier and second rectifier are coupled to each other with at least one switch. The second rectifier is connected to a common load and the first rectifier is connected to the load via the at least one switch. | 11-10-2011 |
20110273148 | OUTPUT CONTROL DEVICE FOR HYBRID ENGINE-DRIVEN POWER GENERATOR - A power generator has a battery and an alternator driven by an engine. The battery assists a power energy of the alternator. An inverter circuit is connected to an output of a rectifying circuit. A DC/DC converter boosts a voltage of the battery and inputs the boosted voltage into a constant power regulator. The constant power regulator boosts an input voltage and secures a certain power. An output voltage of the rectifying circuit is monitored by a monitoring means and an output voltage of the battery is monitored by a monitoring means. When the output voltage of the rectifying circuit is equal to or less than a rated voltage, an auxiliary power value corresponding to the remaining amount of the battery is set as a power target value of the constant power regulator. | 11-10-2011 |
20110285361 | POWER SUPPLY DEVICE - A power supply device includes: a rectifier having a full-wave rectification circuit whose low side elements are made of MOSFETs; an electrical load supplied with DC power from the rectifier; and a control circuit having a load voltage detector and an AC voltage detector for detecting an input terminal voltage from a permanent-magnet generator; wherein when a terminal voltage across the electrical load is lower than a predetermined value, the control circuit operates the rectifier in full-wave rectification mode, whereas when the terminal voltage across the electrical load is higher than the predetermined value, the control circuit short-circuits input terminals of the permanent-magnet generator with each other, and when power for driving the control circuit is not secured, the control circuit retains the full-wave rectification mode even if the terminal voltage across the electrical load is higher than the predetermined value. | 11-24-2011 |
20120105020 | CONTROLLER FOR AC GENERATOR - A control system that can accommodate the wide variations in the output of a generator, such as a permanent magnet alternator, while providing an output with relatively uniform phase ripple. The control system includes a zero crossing detector and variable ramp generator for generating control signals to a switching rectifier to generate a regulated DC signal. | 05-03-2012 |
20120153904 | RESONANT COMMUTATION SYSTEM FOR EXCITING A THREE-PHASE ALTERNATOR - An alternator has a field coil that produces a magnetic field which induces electricity in an coil arrangement. A field coil excitation system includes a generator with an output coil assembly for producing alternating electricity. A rectifier converts the alternating electricity into voltage and direct current at two nodes. A capacitor, between the nodes, has capacitance that forms a resonant circuit with inductance of the output coil assembly. Due to that resonant circuit, the voltage and direct current oscillate in a predefined phase relationship. A switch and the field coil are connected in series between the nodes. A controller renders the switch conductive for a time period specified by a received control signal. The switch is rendered non-conductive at the first occurrence of a minimum current level after the time period ends. The predefined phase relationship enables the minimum current level to be detected by sensing the voltage. | 06-21-2012 |
20120161724 | VEHICLE POWER GENERATION VOLTAGE CONTROL APPARATUS - A vehicle power generation voltage control apparatus is obtained, which has improved reliability, when in a faulty condition, of controlling an exciting current flowing through a field winding even if a monitor and detection circuit becomes faulty. An output voltage of a vehicle power generator or a battery terminal voltage connected to the vehicle power generator is detected by plural monitor and detection circuits, and according to the output of the plural monitor and detection circuits, an exciting current flowing through a field winding of the vehicle power generator is switched on and off, to control the output voltage of the vehicle power generator or the battery terminal voltage connected to the vehicle power generator to be a target voltage. | 06-28-2012 |
20120217937 | DRIVE CIRCUIT FOR SWITCHING ELEMENT - A drive circuit is used for driving a switching element. The drive circuit includes a detection unit and an integrated circuit. The detection unit detects a state of a controlled switching element and outputs a voltage signal corresponding to a detection result of the state. The integrated circuit receives the voltage signal via an input terminal for the detection result and controls the switching element based on the received voltage signal. The input terminal includes at least two input terminals that are connected to each other so as to receive the same voltage signal from the detection unit. | 08-30-2012 |
20120262129 | DOUBLE FED INDUCTION GENERATOR CONVERTER AND METHOD FOR SUPPRESSING TRANSIENT IN DEACTIVATION OF CROWBAR CIRCUIT FOR GRID FAULT RIDETHROUGH - A double fed induction generator (DFIG) system and controller are presented in which the rotor side converter is preloaded with one or more initial values for resuming regulated operation to counteract transients upon deactivation of the crowbar protection circuit to provide grid fault ride through. | 10-18-2012 |
20120268081 | DIRECT POWER AND STATOR FLUX VECTOR CONTROL OF A GENERATOR FOR WIND ENERGY CONVERSION SYSTEM - A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude. | 10-25-2012 |
20120299558 | SUBMERGED RAM AIR TURBINE GENERATING SYSTEM - A submerged ram air turbine generating system adapted for use in a pod mounted to the wing of an aircraft comprises a submerged inlet extending substantially entirely around the outer surface of the pod housing, a stator in the form of adjustable or fixed inlet guide vanes which direct an air stream to a hybrid ram air turbine having alternating turbine blades and splitters, and, a number of adjustable exhaust panels which are movable with respect to one or more exhaust openings in the pod housing. | 11-29-2012 |
20120326677 | ROTARY ELECTRICAL MACHINE WITH EXCITATION PROVIDED WITH A DIGITAL REGULATOR DEVICE - The rotary electrical machine is capable of functioning as a generator and outputs a continuous output voltage (Ub+) that is adjustable by an excitation current. The digital regulator ( | 12-27-2012 |
20130015826 | Permanent magnet multipole alternator for electrical energy generation systemsAANM Imoli; DanteAACI MontebellunaAACO ITAAGP Imoli; Dante Montebelluna IT - A permanent magnet multipole alternator includes an external rotor mechanically connectable to a source of variable velocity and having permanent magnets, an internal stator having windings housed in slots defined by equidistant teeth terminating in projecting extension pieces, a circuit converting the alternating current generated by the alternator into substantially direct current, and a circuit controlling the rotational speed of the energy source based on load. The conversion circuit has a bridge rectifier circuit, the permanent magnets of the rotor are of approximately trapezoidal shape, the distance between the magnets and the extension pieces of the stator teeth is between 0.8 and 1.8 mm, the ratio between the lengths of the major and minor bases of each magnet is between 1.2 and 6, and the ratio between the length of each extension piece of the stator teeth and the distance between the magnets, is between 0.5 and 2. | 01-17-2013 |
20130057227 | METHOD AND APPARATUS FOR CONTROLLING A CONVERTER - An apparatus and method of controlling an electrical generating apparatus is provided. The apparatus includes an electrical generator configured to be connected to an electrical grid and a converter comprising an inverter connected to a rotor of the electrical generator. The apparatus also includes a shunt protection circuit connected to the inverter and the rotor of the electrical generator and a control unit configured to activate and deactivate the inverter and the shunt protection circuit. The control unit is configured to, in response to determining that an abnormal condition is occurring in the electrical generator or an electrical grid to which the electrical generator is connected, deactivate the inverter and activate the shunt protection circuit. Also, after it is determined that the abnormal condition has passed, the control unit is configured to activate the inverter before deactivating the shunt protection circuit. | 03-07-2013 |
20130088205 | VOLTAGE REGULATION SYSTEM AND METHOD - Embodiments of the invention provide an electric machine module including a housing. The module can include an electric machine positioned within the housing. The electric machine can include a field coil and a stator assembly. The module can include a rectifier assembly coupled to the housing and electrically connect to the stator assembly. The rectifier assembly can include at least one output post. A voltage regulator is coupled to the housing and includes at least one field post and a sense post. The voltage regulator is electrically connected to the rectifier assembly. The module can include a remote sense terminal coupled to the housing. A sense switch circuit is electrically coupled to at least the remote sense terminal, the sense post, and the at least one output post. | 04-11-2013 |
20130134950 | METHOD OF CONTROLLING THE REGULATION OF A MOTOR VEHICLE ALTERNATOR, AND CORRESPONDING DEVICES - A method comprises the transmission to a regulator ( | 05-30-2013 |
20130234678 | ALTERNATOR RIPPLE VOLTAGE REDUCTION USING OUTPUT FEEDBACK TO AN INDEPENDENT FIELD COIL - A generator comprises first and second field coils whose combined magnetic flux causes stator current within one or more stator windings which, when rectified via a rectifier circuit, produces rectified output current with reduced voltage fluctuations. A filter circuit extracts the AC component of the rectified output current and delivers it to the second field coil. The magnetic flux generated by the second field coil modifies the magnetic flux of the first field coil effectively cancelling the voltage ripples associated with the rectified output current of the generator. | 09-12-2013 |
20130241502 | Regulating Generators Using Battery Charge Information - According to one embodiment, an electrical system comprises a generator, a battery, and a regulator. The generator is operable to provide electrical energy at a plurality of voltage levels. The battery is in electrical communication with the generator. The regulator is operable to compare a charge level of the battery to a reference charge level, determine a voltage level for the generator based on the comparison, and provide a signal indicative of the determination toward the generator. | 09-19-2013 |
20130335039 | CONTROL DEVICE AND CONTROL METHOD FOR A VEHICLE AC GENERATOR - The control device including: a power transistor ( | 12-19-2013 |
20140042990 | ELECTRIC ROTARY MACHINE FOR MOTOR VEHICLE - An alternator has rectifying module groups. The rectifying module groups form a bridge circuit. The rectifying module groups have a load dump protection judgment section for monitoring an output voltage of rectifying module groups. When the monitored output voltage exceeds a first threshold voltage, the load dump protection judgment section provides to a control section an instruction to turn on MOS transistors in a lower arm of the bridge circuit at a time when a predetermined delay time has elapsed. When a second threshold voltage is lower than the first threshold voltage and the monitored output voltage becomes less than the second threshold voltage after the monitored output voltage exceeds the first threshold voltage, the load dump protection judgment section provides to the control circuit an instruction to turn on the MOS transistors in the lower arm after the MOS transistors are turned off during a predetermined time length. | 02-13-2014 |
20140097805 | ELECTRIC POWER SUPPLY SYSTEM - An electric power supply system includes: an AC generator having a drooping characteristic; a rectification section for converting AC output of the AC generator to DC; a load having an electric storage device supplied with power from the AC generator; and a control section provided between the rectification section and the load. The control section controls the AC generator so that the AC generator operates at predetermined voltage lower than output voltage corresponding to the maximum power operation point of the AC generator. | 04-10-2014 |
20140132227 | REGULATION METHOD - The invention relates to a method for automatic regulation of a system in which a plurality of parameters characteristic of the system are measured and in which at least one control parameter (u) is applied as a function of the measured parameters (y). The method includes choosing a nominal operating point of the system, and defining a nominal model (Mn) of the system at this nominal operating point. The method further includes determining a set of representative models ([Mk]) of the possible variations relative to the nominal model (Mn) and parameterizing the error of the nominal model (Mn) of the system by decomposition ([δ | 05-15-2014 |
20140139195 | VOLTAGE REGULATOR DEVICE - A voltage regulator device ( | 05-22-2014 |
20140253054 | ALTERNATOR FOR A POWER GENERATION SYSTEM - An alternator for a power generation system. The alternator includes a stator. The stator includes a main output winding, a poly-phase auxiliary winding and an exciter field winding that is powered by the poly-phase auxiliary winding. The alternator further includes a rotor that includes an exciter secondary winding and a rotary field winding that is powered by the exciter secondary winding. The rotary field winding voltage is determined by the exciter secondary winding voltage. In some power generation systems, the rotary field winding current of the rotor may be directly rectified from the exciter secondary winding current by uncontrolled rectifiers. The alternator further includes a regulator that measures a current to the exciter field winding. The regulator controls the current to a set point in order to regulate an output voltage produced by the main output winding of the stator. | 09-11-2014 |
20140266079 | METHOD OF CONTROLLING ROTATING MAIN FIELD CONVERTER - A generator system includes a generator having a stationary portion and a rotating portion. An exciter field winding and a main armature winding are disposed on the stationary portion. An exciter armature winding and a main field winding are disposed on the rotating portion. A frequency demodulator is configured to extract a frequency modulated control signal from the exciter armature winding and to demodulate the frequency modulated control signal to generate a demodulated control signal. The generator includes a main field rotating power converter to selectively control current in the main field winding in response to the demodulated command signal. The generator system includes a generator control unit in electrical communication with the generator to monitor the output voltage at the main armature winding and to output an exciter current including the frequency modulated control signal to the exciter field winding based on the output voltage. | 09-18-2014 |
20140292285 | Increasing the Excitation Current of a Multiphase AC Generator Connected to an Electrical System of a Motor Vehicle Upon the Activation of the Generator - A process for increasing the excitation current, particularly when activating the alternator, whose rectified alternator voltage is regulated by way of a regulator, is provided. For regulating the alternator voltage, the regulator sets the excitation current of an excitation winding of the alternator. The regulator further receives a phase signal. A rapid increasing of the excitation current to a defined value takes place, during which the phase signal is analyzed simultaneously. This rapid increasing continues until the phase signal or a quantity derived therefrom meets a defined condition with respect to the alternator voltage. Therefore, a further increasing of the excitation current takes place, preferably at a rate of change reduced with respect to the previous rapid increase. | 10-02-2014 |
20150015215 | VOLTAGE REGULATOR, UNDER-VOLTAGE PROTECTION CIRCUIT THEREOF AND VOLTAGE REGULATION SYSTEM - A voltage regulator coupled between a batteryless alternator and a ground includes an under-voltage detection circuit and an exciting current regulating unit. The under-voltage protection circuit includes a voltage detection unit, a plurality of switching circuits, and a power switch. The voltage detection unit generates a first control signal according to an output voltage of the batteryless alternator. The switching circuits are connected in series and controlled by the first control signal. The power switch is coupled to one of the switching circuits and a rotor coil of the batteryless alternator. The exciting current regulating unit controls the operation of the power switch according to the output voltage of the batteryless alternator. The voltage detection unit detects whether the output voltage is lower than a threshold and selectively cuts off the power switch by sequentially controlling the operations of the switching circuits according to the detection result. | 01-15-2015 |
20150048805 | POWER CONVERSION APPARATUS AND CONTROL METHOD THEREOF - An AC/DC conversion circuit of a power conversion apparatus receives an AC signal and has a switching element. A voltage sensing circuit generates a voltage reference signal according to an AC voltage signal. A harmonic generation circuit generates a harmonic injection signal according to the voltage reference signal. A subtraction circuit of a maximum power tracking circuit outputs a first DC signal and a second DC signal according to the voltage reference signal. An arithmetic circuit outputs a reference signal. A current sensing circuit outputs a feedforward signal according to one phase of an AC current signal. A current control circuit outputs an error signal according to the reference signal and the feedforward signal. A pulse width modulation circuit outputs a control signal to control the switching element according to the error signal and the harmonic injection signal, so that an aerogenerator operates at the maximum power approximation line. | 02-19-2015 |
20150303853 | ALTERNATOR CONTROL APPARATUS - An alternator control apparatus is provided which includes a first controller and a second controller that periodically transmits an instruction signal related to electric power generation to the first controller, wherein the instruction signal selectively includes a power generation instruction signal and a non-power generation instruction signal, the first controller, if a detection value of power supply voltage is less than a threshold and receives the power generation instruction signal from the second controller, controls a power generation amount of the alternator to be greater than a predetermined reference, and, if the detection value is less than the threshold and receives the non-power generation instruction signal from the second controller, forms or maintains the non-power generated or the power generation suppressed state, the second controller periodically transmits the non-power generation instruction signal to the first controller until a predetermined condition is met after completion of engine start. | 10-22-2015 |
20160043675 | ALTERNATOR OVERVOLTAGE PROTECTION CIRCUIT - Disclosed is an alternator overvoltage protection circuit having a TRIAC and a MOSFET. The TRIAC is electrically connected to the MOSFET and the TRIAC is electrically connected to a magneto. The TRIAC is configured to ground the magneto when triggered by the MOSFET. The MOSFET is electrically connected to an alternator and configured to conduct when the alternator operates in an overvoltage condition. Also disclosed is a method of alternator overvoltage protection for a piece of outdoor power equipment, the method including providing a TRIAC and an alternator rotated by an engine having a magneto, wherein the alternator outputs a voltage when rotated by the engine. The method further includes configuring the TRIAC to ground the magneto when the alternator operates in an overvoltage condition, thereby disabling the magneto, which stops the rotation of the engine and stops the alternator from outputting voltage. | 02-11-2016 |
20160094171 | METHOD AND APPARATUS FOR REGULATING AN OUTPUT VOLTAGE OF AN ALTERNATOR - A method of regulating an output voltage of an alternator. The method comprises measuring first and second external contacts of the alternator regulator module operably coupled to first and second output contacts of the alternator respectively during an ON state of an excitation cycle for the alternator, measuring a second voltage across the first and second external contacts of the alternator regulator module during an OFF state of an excitation cycle for the alternator, deriving an average voltage value of the first and second voltage measurements, and deriving an offset value based at least partly on the derived average voltage value. | 03-31-2016 |
20160118920 | POWER GENERATOR WITH LOAD-DUMP PROTECTION - In a power generator, a determiner determines whether a phase voltage output from each of multiphase armature windings has exceeded a threshold voltage. A turn-on unit turns on at least one of the protective switches as a target protective switch to limit the output voltage of the rectifier circuit to be lower than the threshold voltage upon the phase voltage output from at least one of the multiphase armature windings corresponding to the at least one of the protective switches has exceeded the threshold voltage. | 04-28-2016 |
20160149529 | GENERATOR EXCITATION REGULATION USING PULSE WIDTH MODULATION - A system may be configured to provide a regulated generator field current to a generator to acquire a regulated output voltage of the generator. In one example, the system comprises a controller configured to provide an actuator control signal on the basis of an error signal, an actuator configured to provide on the basis of the actuator control signal a pulse-width modulated output voltage that is configured to drive the regulated generator field current into the generator, the pulse-width modulated output signal having a duty cycle controlled by the actuator control signal, and an error evaluator configured to provide the error signal based on a combination of a first deviation signal and a second deviation signal. | 05-26-2016 |
20160173016 | PROTECTION METHOD FOR A GENERATOR | 06-16-2016 |
20160204723 | BUSS POTENTIAL ISOLATION MODULE | 07-14-2016 |
20160380567 | Alternator Control with Temperature-Dependent Safety Feature - A method for controlling an alternator includes determining a temperature-dependent value associated with a battery coupled to an alternator and determining an excitation emergency threshold for the alternator based on the determined temperature-dependent value associated with the battery. The method further includes initiating, by a controller of an alternator, at least one safety measure upon a determination that a voltage associated with the battery exceeds the determined excitation emergency threshold. | 12-29-2016 |