Abstract: 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.

Abstract: A generator system is disclosed. The generator system includes an input gear, a gear train coupled to the input gear, and a clutch associated with the input gear, wherein the clutch is exposed to the gear train.

Abstract: 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.

Abstract: 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.

Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.

Abstract: 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.

Abstract: 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.

Abstract: A method of coupling a mechanical power source through an electrical power generator to an electrical load is disclosed. A characteristic of an electrical output is measured from the electrical power generator produced during a power generation cycle during which there is a coupling of the mechanical power source through the electrical power generator to the electrical load. The coupling of the mechanical power source is adjusted through the electrical power generator to the electrical load during a subsequent power generation cycle based at least in part on the measured characteristic of the electrical output.

Abstract: The invention concerns a method for the operation of an underwater power plant with a water turbine to take up kinetic energy from a surrounding flow; and an electrical generator coupled directly to the water turbine; characterized in that the power regulation in the generator mode is done by a control or regulation of the load moment produced by the electrical generator for a freely adjusting rpm speed of the water turbine, wherein the setpoint value of the load moment in a first, power-optimized operating range is established by a state controller and/or a search mechanism for the power maximum; and in a second, power-limited operating range the assigned load moment is chosen so that an operating point distant from the power optimum results for the water turbine.

Abstract: A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.

Abstract: An aircraft starting and generating system includes a first starter/main machine assembly that includes a first exciter and a first main machine, and second starter/main machine assembly that includes a second exciter and a second main machine. The system also includes a permanent magnet generator (PMG) that is connected to the first and second starter/main machine assemblies. The system further includes a first inverter/converter/controller (ICC) that is connected to the first starter/main machine assembly and to the PMG, and a second ICC that is connected to the second starter/main machine assembly and to the PMG.

Abstract: A hybrid engine installation (200) includes drive element (204) suitable for driving a mechanical element (BTP, BTA) in rotation. In addition, the hybrid engine installation is remarkable in that it includes at least one gas turbine (253, 254) and at least one electric motor (201) mechanically linked to the drive element (204) to drive it in rotation.

Abstract: 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.

Abstract: A vehicle alternator for generating electric power is driven by an engine mounted on a vehicle driven through a driving belt. The alternator has a pulley part joined to and directly receiving a driving force from the engine through the driving belt, a field magnet part located in separation from the pulley part, a rotation speed changing part placed between the pulley part and the field magnet part. The rotation speed changing part converts the number of revolutions between the pulley part and the field magnet part. The rotation speed changing part decreases a speed changing ratio “S” according to increasing of the number of revolutions of the engine, where the speed changing ratio “S” is obtained by dividing the number of revolutions of the field magnet part by the number of revolutions of the pulley part.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The stator of the vehicle-mounted alternator includes a stator core formed with a plurality of slots located along a circumferential direction thereof, and first and second multi-phase windings wound in the slots, the first and second multi-phase windings being spaced from each other by a predetermined electrical angle. An output of the first multi-phase winding is rectified by a first rectifier device, and an output of the second multi-phase winding is rectified by a second rectifier device. The second rectifier device is constituted by a plurality of switching devices. The vehicle-mounted alternator includes a control device to perform on/off control on the switching devices such that a phase angle difference between an output of the first rectifier device and an output of the second rectifier device is varied depending on a rotation speed of the stator.

Abstract: 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.

Abstract: 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.

Abstract: An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the starter/generator. The exciter includes a stator and a rotor, and wherein the exciter rotor includes a three-phase AC winding.

Abstract: A voltage controller has an integrated control circuit having a plurality of lead wires, a plurality of connecting terminals, and a terminal holding body holding the terminals such that a portion of each terminal is protruded from a surface of the body so as to be connected with one lead wire. The control circuit controls an output voltage of an alternator by receiving or outputting signals transmitted through the lead wires and the connecting terminals. The protruded terminals are disposed so as to be aligned along a plurality of lines on the surface of the body. Therefore, an on-surface distance between terminals adjacent to each other is sufficiently set at a large value, and the arrangement of the terminals prevents the terminals from being short-circuited.

Abstract: A propulsion system for a watercraft is described, having a diesel engine (4), a propeller (2), at least one auxiliary generator set (12), a generator (6) and a drive unit for at least one machine, in which case the diesel engine (4) can be connected on the one hand to the propeller (2) and on the other hand by means of the generator (6) to a power supply system (10) in the watercraft, and with the drive unit for machines having at least one converter (34, 36, 38, 62) which can be connected on the one hand to the power supply system (10) and on the other hand to the machines. At least one converter (34, 36, 38, 62) for the drive unit for machines can be connected on the load side to the generator (6).

Abstract: 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.

Abstract: An engine start method of a vehicle having starter and ISG considers the temperature of an engine coolant and the voltage of a battery. The objective start rpm of the starter is raised and the objective start rpm of the ISG is lowered as the engine temperature is lowered.

Abstract: An improved regulator system is disclosed for controlling a field winding of an alternator to regulate the charging of a battery. The improved regulator system comprises an internal regulator mounted onto the alternator. The internal regulator has an internal regulator control circuit for monitoring the battery and for controlling the field winding. An electrical connector actuates the internal regulator to regulate the output of the alternator in accordance with the internal regulator. The electrical connector enables an external regulator to be connected to the alternator thereby bypassing the internal regulator to regulate the output of the alternator in accordance with the external regulator. The improved regulator system facilitates the connection of an upgrade external regulator with the internal regulator functioning as a reserve regulator in the remote event of a malfunction of the external regulator.

Abstract: The method of controlling a reversible, polyphase rotary electrical machine called an alternator-starter, for a motor vehicle with a heat engine, the machine being adapted to work either as an electric generator—in an alternator mode—or as an electric motor, in particular for starting the engine, the machine comprising a rotor with at least one excitation winding, a target and sensors, is characterised in that, starting from sensors of the linear type delivering signals of a sinusoidal type after reading of the target, a summation of the signals delivered by the sensors is performed in a processing unit, by applying a coefficient to the sensors to create signals which are out of phase with each other, and the number of which is equal to the number of sensors, and in that, for each out of phase signal, the sum of the coefficients is zero.

Abstract: A starter-generator system is configured to supply power to an aircraft electrical bus having a rated AC voltage magnitude, or receive power from a start converter, and includes a rotor and a stator. The stator is disposed at least partially around at least a portion of the rotor and has at least one multi-phase stator winding set wound thereon that has an increased number of turns per phase that is greater than a least number of turns per phase needed to supply power to an aircraft electrical bus at the rated AC voltage magnitude. The increased number of stator turns results in reduced current drawn by the starter-generator during the motor mode, which improves the efficiency and introduces other benefits to the overall starting system.

Abstract: A vehicle includes a starter-generator. According to some embodiments, one of at least two operator activated input mechanisms may be selected for starting the starter-generator. According to some methods of operation, the starter-generator can be used to pre-set pistons of the engine.

Abstract: A vehicle powertrain control system including an electric motor drive system, a first battery coupled to the electric motor drive system, an electronically controlled switched coupled to the first battery, a second battery coupled to the electronically controlled switch, and where the electronically controlled switch applies power from the second battery to supplement the first battery.

Abstract: A starter-generator system is configured to be operable at multiple variable frequencies. The starter-generator includes a rotor and a stator. The rotor is configured to rotate and has a single main field winding wound thereon. The stator has at least a first stator winding set and second stator winding set independently wound thereon. Upon electrical excitation and rotation of the rotor the starter-generator supplies electrical power from each of the stator winding sets at different frequencies. Also, upon electrically exciting one or both of the stator winding sets with appropriate AC power, the rotor will rotate and generate a starting torque.

Abstract: A wind turbine is provided, the wind turbine comprising, a synchronous generator having a stator and a rotor, an AC-DC-AC link for coupling said synchronous generator to a grid, wherein the DC link is connected to the rotor of said synchronous generator for supplying an excitation voltage to a rotor winding of said rotor. Furthermore, a method of starting a wind turbine with an electrically excited synchronous generator is provided, the method comprising the steps of (a) opening a grid contactor; (b) closing a bypass contactor to bypass a grid-side DC-AC inverter of said wind turbine; (c) charging a DC link of said wind turbine; (d) supplying an excitation voltage to rotor windings of said synchronous generator, wherein said excitation voltage is supplied from the DC link; and (e) opening said bypass connector and closing said grid connector.

Abstract: A method and apparatuses are used for power conversion. The apparatus according to one embodiment comprises a plurality of power conversion modules (130—1, . . . 130—n), the plurality of power conversion modules (130—1, . . . , 130—n) being optionally controllable to function independently of each other to supply a plurality of systems (200—1, . . . , 200—n), function in an inter-relational mode in which at least one power conversion module from the plurality of power conversion modules (130—1, . . . , 130—n) drives a system and, upon a failure of the at least one power conversion module, at least another power conversion module from the plurality of power conversion modules (130—1, . . . , 130—n) will drive the system, and function in a scalable mode in which at least two power conversion modules of the plurality of power conversion modules (130—1, . . . , 130—n) are connected to provide an additive output.

Abstract: A method and apparatus is disclosed for starting and stopping a generator set that supplies power to a refrigeration system. An ambient temperature sensor is used rather than an in-box sensor in addition to a programmed microprocessor to regulate the operation of the generator. Unnecessary use of the generator is, thereby, limited which contributes to cost, energy and equipment savings and a cleaner environment while ensuring the required in-box temperature is maintained and the quality of perishable goods are not compromised.

Abstract: A generator-motor includes a control circuit. The control circuit is provided on an end surface of a motor. The control circuit includes a Zener diode, a capacitor, a U-phase arm, a V-phase arm, and a W-phase arm. The Zener diode, the capacitor, the U-phase arm, the V-phase arm, and the W-phase arm are connected in parallel between a positive bus and a negative bus. The Zener diode absorbs a surge voltage applied to the capacitor, the U-phase arm, the V-phase arm, and the W-phase arm.

Abstract: An automotive staffer generator apparatus that is inexpensive and compact, enabling engine starting functions and generating functions to be made compatible by improving maximum torque without having to increase the number of turns in an armature winding. An automotive starter generator machine includes: an armature core onto which an armature winding is wound; and a rotor having: a claw-pole rotor core disposed on an inner peripheral side of the armature core; and a field winding installed on an inner peripheral side of claw-shaped magnetic poles of the claw-pole rotor core, and has a starting function for starting an engine and a generating function. Permanent magnets are disposed between adjacent claw-shaped magnetic poles.

Abstract: A starter-generator system is configured to supply power to an aircraft electrical bus having a rated AC voltage magnitude, or receive power from a start converter, and includes a rotor and a stator. The stator is disposed at least partially around at least a portion of the rotor and has at least one multi-phase stator winding set wound thereon that has an increased number of turns per phase that is greater than a least number of turns per phase needed to supply power to an aircraft electrical bus at the rated AC voltage magnitude. The increased number of stator turns results in reduced current drawn by the starter-generator during the motor mode, which improves the efficiency and introduces other benefits to the overall starting system.

Abstract: A starter-generator system is configured to be operable at multiple variable frequencies. The starter-generator includes a rotor and a stator. The rotor is configured to rotate and has a single main field winding wound thereon. The stator has at least a first stator winding set and second stator winding set independently wound thereon. Upon electrical excitation and rotation of the rotor the starter-generator supplies electrical power from each of the stator winding sets at different frequencies. Also, upon electrically exciting one or both of the stator winding sets with appropriate AC power, the rotor will rotate and generate a starting torque.

Abstract: This invention discloses a vehicle electrical system voltage regulator with improved electrical protection and warning means that discerns and responds to regulator, generator, or vehicle electrical system operation and malfunctions. The regulator includes monitoring, control, and protection circuits with a phase signal monitor, a field switching circuit that operates the field coil in response to electrical power demands, and a field enable switch in series with the field regulating switch. The phase monitor and protection circuit ascertains and transmits generator rotational motion for use by the monitoring and control circuit in discerning the various operating conditions. The monitoring and control circuit operates on the field switching circuit to meet the electrical power demands and provide multi level fault protection to include field switching circuit reconfiguration to continue operating under various fault conditions.

Abstract: A wound field synchronous (WFS) dynamoelectric machine comprises: a rotor assembly; an exciter generator section comprising a stationary multiphase exciter stator winding for receiving excitation power from a multiphase alternating current (AC) source to generate an exciter stator magnetic field, a multiphase exciter rotor winding in the rotor assembly for generating multiphase AC excitation power as it cuts through the exciter stator magnetic field and a rotating rectifier assembly in the rotor assembly for converting the multiphase AC excitation power to direct current (DC) excitation power; a synchronous machine section comprising a DC main rotor winding in the rotor assembly for generating a main rotor magnetic field and a stationary multiphase main stator winding for receiving a multiphase AC control signal to generate a rotating main stator magnetic field that interacts with the main rotor magnetic field to rotate the rotor assembly; and an impedance that selectively connects one phase of the exciter st

Abstract: In the control device for motor generator in which an engine is started and power generation is performed while a vehicle is running, a field current limit value Ifm in electric driving to start the engine is larger than a field current limit value Ifg in power generation. In the power generation, an inverter mode in a low rotation speed zone for boosting and an alternator mode in a high rotation speed zone for rectifying and outputting a generated voltage without boosting are provided. A field current limit value Ifgi in the inverter-mode power generation and a field current limit value Ifga in the alternator-mode power generation are set differently from each other, and the larger value is set as the value Ifg.

Abstract: At a time of stopping an internal combustion engine, inertia energy of the engine is kept constant, for example, by controlling a number of engine revolution constant, while controlling combustion of the engine. By utilizing the controlled inertia energy, the engine is stopped at a predetermined crank angle position. Since the engine is stopped at the predetermined crank angle position by utilizing the controlled inertia energy, a large amount of energy for controlling the stop position of the energy is not needed, and the energy needed for the stop control can be reduced. Since the inertia energy utilized for the stop control is always controlled in a predetermined state, the engine can be stopped at a proper position reliably each time.

Abstract: A method of detecting an angular position of a rotor of an electrical machine includes determining a rotor position for the electrical machine using data obtained from a first data source, determining a rotor position for the electrical machine using data obtained from a second data source, and switching between determining a rotor position using data obtained from the first data source and using data obtained from the second data source. A point at which switching occurs is different when a speed of rotation is increasing than when the speed of rotation is decreasing.

Abstract: A starter/generator system for a gas turbine engine used in aeronautical applications that couples a single dynamoelectric machine to the gas turbine engine through a torque converter in a starting mode, and engages the engine to the dynamoelectric machine through a mechanical differential in a generating mode after the engine reaches self-sustaining speed and combines the output of the engine and the torque converter to regulate the frequency of AC generated by the dynamoelectric machine within a range of frequencies suitable for on-board electrical equipment by dynamically regulating the flow of hydraulic fluid to the torque converter.

Abstract: A permanent magnet starter/generator subsystem configured in a fault tolerant architecture is described herein for small engine applications. The system allows for lighter system weight, improved system reliability, higher performance capability and reduced maintenance.

Abstract: A vehicle includes a starter-generator assembly; portions of the assembly may be disposed within a stator cover, which is mounted to a crank case of an engine of the vehicle. According to some embodiments, one of at least two operator activated input mechanisms may be selected for starting the starter-generator. According to some methods of operation, the starter-generator assembly can be used to pre-set pistons of the engine.

Abstract: An apparatus (80) controls a synchronous machine (20) used to start an engine (300) during an engine start operation. The apparatus comprises: an exciter current control unit (84) for controlling exciter current output to the synchronous machine (20) during the engine start operation; and a main current control unit (82) for controlling main current output to the synchronous machine (20) during the engine start operation as a function of machine speed. In one implementation, the main current control unit (82) controls main current output to the synchronous machine (20) so that the synchronous machine (20) exhibits a reduced output torque during an initial torque application stage. The reduced viscous drag effects and reduced impact torque are beneficial to the engine system (100).

Abstract: In a vehicle electric rotating machine having a power section formed of a pair of inverter modules of switching elements and diodes connected in parallel thereto, and a control circuit section that controls mentioned power section, there are separately located the control circuit section on the upstream side, and the power section on the downstream side; as well as a through hole is formed in mentioned control circuit section so that mentioned cooling air flows linearly through mentioned power section.

Abstract: The present invention provides an improved control method and apparatus allowing units arranged at different spaced apart locations to be controlled without the need for a high bandwidth link between the units and the controller. This allows a single controller to control a number of remotely located units.

Abstract: System, especially for a motor vehicle, able, on the one hand, to start up an internal-combustion engine and, on the other hand, to charge an electrical circuit, including a main electrical machine able to operate, on the one hand, as a generator and, on the other hand, as an electric motor, the said electrical machine driving the internal-combustion engine by means of a belt when it is operating in motor mode, the system further including management means which drive the main electrical machine, characterised in that it includes a supplementary starter, as well as means for detecting at least one condition for triggering the activation of the said supplementary starter, and the management means drive the main electrical machine and the starter, according to a particular sequence, when the said condition is detected by the said detection means.