Abstract: A synchronous and bi-directional power conversion module (140) for use in a variable frequency power conversion system (100) comprises a first input/output side (142) for AC power input/output and DC power source input; a second input/output side (144) for DC link connection; and an active power switching arrangement (Q1–Q6), which is controlled by a gating pattern to perform multi-mode power conversion. The active power switching arrangement (Q1–Q6) is controlled to convert DC link voltage from the DC link connection (144) to an AC load supply voltage during a forward power mode; convert AC input power from the first input/output side (142) to a regulated DC link voltage during an AC source input, reverse power mode; and convert DC input power from the first input/output to a regulated DC link voltage during a DC source input, reverse power mode.

Abstract: A rotating electrical machine, such as an aircraft starter-generator, that may be operated in either a DC motor mode or an AC generator mode. The machine includes a conventionally wound main stator that is selectively configurable as a multi-pole AC stator and a multi-pole DC stator. The machine also includes rotor windings that are configured to be selectively coupled to either an exciter or a plurality of commutator segments, and DC brushes that are selectively moveable into, and out of, electrical contact with the commutator segments, to thereby electrically couple and decouple a DC power source to and from, respectively, the rotor windings.

Abstract: The present invention is directed to determining and controlling the appropriate moment at which a combined starter/alternator should transition from start-up mode to alternator/generator mode following an IC engine start-up sequence. The method relies on starter/alternator motor phase voltage or motor phase current monitoring to establish the timing of the transition.

Abstract: The system includes at least one transmission belt operable to couple the drive shafts of auxiliary devices with a pulley operatively connectable to the crankshaft of the internal combustion engine, and a servo controlled clutch operable selectively to control the coupling of the pulley with the crankshaft of the internal combustion engine. Between the pulley and the crankshaft of the engine is interposed an overrun clutch such that when the angular velocity of the crankshaft is greater than and, respectively, less than that of the pulley, the pulley is able to be driven in rotation by the crankshaft and, respectively, becomes freely rotatable with respect to this crankshaft. The servo controlled clutch is normally de energised and disengaged.

Abstract: A system and method is provided for starting a prime mover coupled to a synchronous starter/generator. The system includes an exciter converter that provides a non-fundamental only signal to a field winding of an exciter of the synchronous generator. The non-fundamental signal provides a first rotating field for the field winding of the exciter. Exciter armature windings induce an AC signal from the rotating field where at least one rectifier rectifies the induced AC signal. A field winding of a main machine provides a flux from the rectified signal of the at least one rectifier. Armature windings of the main machine receive an AC signal via a main machine converter.

Abstract: A multi-functional power source includes a generator and an engine arrangement to drive a crankshaft to rotate. The generator includes a generator housing, a rotor which couples with the crankshaft and includes a magnetic element coaxially and rotatably disposed within the generator housing and defining a magnetic cavity within the magnetic element, and a coil assembly coaxially disposed within the magnetic cavity such that when the magnetic element of the rotor is driven to rotate, the coil assembly is adapted for producing the induced electric power. An output axle, having an output end, is integrally extended from the crankshaft to a position out of the generator housing such that when the crankshaft drives the output axle to rotate, the output end of the output axle is adapted for producing an external mechanical power simultaneously when the generator produces the induced electric power.

Abstract: A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the power supply and are configured and controlled so that a capacitance may be selectively placed electrically in series with the exciter stator windings.

Abstract: An engine start system includes a starter starting an engine, a starter drive relay controlling the starter and an engine ECU connected to a starter switch for controlling on/off of the starter drive relay based on a predetermined start condition. The engine start system further includes a normally closed relay connected to the starter switch, the engine ECU and the starter for establishing a de-energized state between the starter switch and the starter upon energization from the engine ECU to an exciting coil and establishing an energized state between the starter switch and the starter upon de-energization of the exciting coil. The engine ECU includes a circuit energizing the exciting coil of the normally closed relay upon turn-on of the engine ECU.

Abstract: A starter/battery charger, which is coupled to an internal-combustion engine, operates as a starting motor for starting the engine and also operates as a charging generator for charging a battery after the engine has been started. Control unit controls the rotation speed of the engine by performing a driving control and a braking control on the starter/battery charger. The control unit carries out a judgement that a self-ignition state has been established in the engine depends on one of the rotation speed of the engine and a variation rate of the rotation speed has exceeded a prescribed value. The control unit switchs from the driving control to the braking control upon the judgement, thereby preventing the overshoot in the rotation speed of the engine.

Abstract: Arrangement for providing an integrated starter generator apparatus for producing electrical power and/or rotational torque. The apparatus includes a primary rotor (18) arranged for cooperation with a primary stator (16), and a secondary rotor (20) arranged for cooperation with a secondary stator (17). A one-way clutch (19) is disposed between the primary rotor (18) and the secondary rotor (20) that permits both rotors to be locked together in one direction of rotation, and that allows them to operate independently in the opposite direction of rotation.

Abstract: A drive system for an industrial truck, comprising an internal combustion engine, a three-shaft epicyclic gearing adapted to be connected to the shaft of the internal combustion engine, a first electric motor which is mechanically coupled to the second shaft of the epicyclic gearing and is connected to an onboard network of the industrial truck, a change-speed gearing coupled to the third shaft of the epicyclic gearing, a summing gearbox coupled to the change-speed gearing the other input shaft of which is connected to a second electric motor which is electrically connected to the onboard network and the output shaft of which is coupled to at least one driven wheel of the industrial truck, a clutch (A) between the first and second shafts of the epicyclic gearing, at least one consumption unit for an additional function of the industrial truck that is coupled to one of the shafts of the epicyclic gearing, a sensor device which measures the speeds of the internal combustion engine, the first and second electric

Abstract: A starting motor 5 of an internal combustion engine 1 drives an input/output pulley 10 through a belt 11. Auxiliary machinery 6, 7 and 8 is driven by the engine 1 though the belt 11 while the engine is in operation. The starting motor 5 drives the auxiliary machinery 6, 7 and 8 through the belt 11 while the engine is in standstill. A speed change mechanism 41 transmits rotation of the starting motor 5 at a high gear ratio to the engine to start the same, and transmits rotation of an engine output shaft 2 at a lower gear ratio to the motor 5 to make the motor 5 generate power while the engine is in operation. The speed change mechanism 41 overlaps the pulley 10 at least partially axially of the output shaft 2. The pulley 10 defines an oil chamber 39 for containing lubricate oil.

Abstract: A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the power supply and are configured and controlled so that a capacitance may be selectively placed electrically in series with the exciter stator windings.

Abstract: A vehicle power generation control apparatus that has a power supply circuit, a rotation detecting circuit, an exciting current detecting circuit, an exciting current control circuit, a torque detecting/maximum exciting current determining circuit and a power transistor. When a speed of rotation of a vehicle generator is detected by the rotation detecting circuit and an exciting current flowing through an exciting winding of the vehicle generator is detected by the exciting current detecting circuit, the torque detecting/maximum exciting current determining circuit calculates an upper limit value of the exciting current so that a rate of change of a generator torque does not exceed a predetermined value, and the exciting current control circuit controls the exciting current so that the exciting current becomes below the limit value. This can prevent the engine revolution from becoming unstable due to variation of load or variation of engine revolution.

Abstract: A gas turbomachinery electricity generation apparatus includes a gas turbomachinery arrangement having an associated rotary drive take-off, an electricity generating arrangement which includes a first generator stage including a first generator rotor and generator stator arrangement; a second generator stage including a second generator rotor and generator stator arrangement, at least of the first and second generator stage rotors is driven by the rotary drive take-off.

Abstract: A starter/alternator system for an engine and a battery of an automobile are provided. The system includes a starter/alternator machine; a three phase MOSgate control inverter/bridge electrically coupled to the starter/alternator machine, the three phase MOSgate control inverter/bridge including bridge connected MOSgated devices; a control ASIC electrically coupled to the bridge connected MOSgated devices of the three phase MOSgate control inverter/bridge, the control ASIC including all control circuitry required to control the starter/alternator machine; and a motor drive circuit electrically coupled to the control ASIC.

Abstract: A method of controlling an electric rotating machine for a vehicle includes an electric rotating machine (1) including a rotator having a field winding (5) and a stator having an armature winding (3), a field current controller (9) for controlling a field current supplied from a direct-current power supply to the field winding (5), and a power converter (6) for converting a direct-current power into an alternating-current power and applying the power to the armature winding (3). When the field current controller (9) starts to supply a current to the field winding (5) for starting an internal combustion engine, the power converter (6) supplies a power to the armature winding (3) so that magnetic flux in a direction opposite to that generated by the field winding (5) is generated simultaneously with or immediately before starting the power supply.

Abstract: The invention in the simplest form is an improved variable speed engine/generator set with an integrated power conditioning system and control method, used to generate high quality AC power with optimum fuel efficiency and reduced emissions. The variable speed generator control scheme allows for load adaptive speed control of engine and generator field. The transformerless power inverter topology and control method provides the necessary output frequency, voltage and/or current waveform regulation, harmonic distortion rejection, and provides for single phase, or unbalanced loading.

Abstract: A starter-generator for an aircraft engine comprises a dynamoelectric machine alternatively operable as a motor or as a generator, having a rotor. A support motor is coupled to the dynamoelectric machine to assist the machine. A torque converter selectively couples and decouples the rotor to the engine, coupling the rotor to the engine at some point when dynamoelectric machine is operated as a motor. A constant speed transmission has an input adapted to be connected to the engine and an output to be connected to the rotor. The unit provides a desired speed relation between input and output. The engine may be started by the dynamoelectric machine when operated as a motor through a first power train including the torque converter and may drive the dynamoelectric machine as a generator through a second power train including the constant speed transmission.

Abstract: A starter-generator for an aircraft engine comprises a variable dynamoelectric machine alternatively operable as a motor or as a generator, having a rotor. A support motor is coupled to the variable dynamoelectric machine to assist the machine. A torque converter selectively couples and decouples the rotor to the engine, coupling the rotor to the engine at some point when the dynamoelectric machine is operated as a motor. The engine may be started by the dynamoelectric machine when operated as a motor through a first power train including the torque converter and may drive the dynamoelectric machine as a generator through a second power train.

Abstract: A method of operating a generator in a vehicle is provided, which generator is driven by an internal-combustion engine and supplies energy to a vehicle wiring system. For improving vehicle emissions, particularly after a cold start of the internal-combustion engine, the generator is not operated immediately after the starting operation but is operated only after a defined time period such that it supplies energy to the vehicle wiring system.

Abstract: A ring type starter/generator comprises ring shaped stator, ring shaped rotor and a set of large current-conversion controller with low power consumption. Ring shaped stator is mounted on engine body or water pump housing, and ring shaped rotor is mounted on engine flywheel or pump impeller. With the help of new integrated electromechanical construction, constituted of shaft, bearings and housing of engine or pump machinery, starter/generator and engine or pump can operate coaxially and directly drive each other. Said ring type starter/generator changes and simplifies conventional construction of electric machinery and mechanical transmission mode of automobile, so that the association of electric machinery with engine is more reasonable and compact, realizing a highly efficient integrated mechanical and electrical construction, and improving to the utmost extent in reliability and working efficiency in transmission of electric machinery.

Abstract: An engine-driven generator G is concurrently used as a starter motor for an engine E that drives a working machine. A motor 25 for motive-power use is a driving source for the working machine to travel. The driving circuit 10 is commonly used between the starter motor G and the motor 25 for travel use. In a starting mode, with switches 35 and 36, the driving circuit 10 is connected to the starter motor G side to start the engine. After complete explosion of the engine, with the switches 35 and 36, the generator G is connected to a regulator 31, while the driving circuit 10 is connected to the motor 25 for travel use. As a result of this, while a battery 14 is electrically charged, the motor 25 for travel use is driven with the battery 14.

Abstract: A starting apparatus for an internal combustion engine comprises a starter/alternator assembly operatively coupled to the engine and capable of being operated in a starter mode for starting the engine and in a generator mode for generating electric power when driven by the engine. The starter/alternator assembly includes a starter/alternator machine drivingly connected to the engine, an inverter provided for controlling an output of the starter/alternator machine to selectively choose either the starting mode or the generation mode, and a starter/alternator speed sensor for monitoring a rotational speed of a rotor of the starter/alternator machine that is electrically connected to the starter/alternator inverter. A method of controlling the engine starting apparatus controls transition of the starter/alternator assembly from the starter mode to the generator mode in response to the rotational speed of the starter/alternator machine directly sensed by the starter/alternator speed sensor.

Abstract: An automotive internal combustion engine control system drives auxiliary machinery by a starting motor while an internal combustion engine is at a standstill and efficiently regenerates energy by operating the starting motor as a power generator while the internal combustion engine is in operation. The output of the starting motor 5 capable of operating as a power generator is transmitted to an input/output pulley 10 mounted on the output shaft of the internal combustion engine 1 by an endless transmission belt 11 to start the internal combustion engine 1. The output of the engine is transmitted to auxiliary machinery 6, 7 and 8 by the endless transmission belt 11 while the internal combustion engine 1 is in operation. The output of the starting motor 5 is transmitted to the auxiliary machinery 6, 7 and 8 by the endless transmission belt 11 while the engine is in an intentional standstill.

Abstract: A starter generator for an internal combustion engine including: a rotating electric machine having a magnet rotor mounted to a crankshaft of the internal combustion engine, and a stator with a three-phase first armature coil and a three-phase second armature coil; a first battery and a second battery connected in series or in parallel; a first driver circuit provided between the first armature coil and the first battery, and a second driver circuit provided between the second armature coil and the second battery; and an inverter that converts voltages of the first battery and the second battery into an AC voltage, wherein drive currents are supplied to the first armature coil and the second armature coil from the first battery and the second battery through switch circuits in the first driver and the second driver, when the engine is started, and induced voltages of the first armature coil and the second armature coil are supplied to the batteries through rectifier circuits in the first driver and the second

Abstract: An electrical machine with a stator component and a rotor component, wherein the stator component carries the winding of the electrical machine, which has a number of coils. An electronic power unit is provided to control the electrical machine. To obtain an electrical machine, which has a long service life but does not occupy much space, the stator component has two or more separate windings to form two or more electrical sub-machines. The electrical machine can be used to advantage as a starter-generator in commercial vehicles and busses. An improved electrical system is also described.

Abstract: A method for starting an internal combustion engine of a hybrid drive of a motor vehicle, the internal combustion engine and at least one electric motor being mechanically linkable to an output shaft of the hybrid drive via a gear system.

Abstract: A starter-generator (ISG) is mechanically connected to an internal combustion engine (BKM), comprises a bi-directional AC/DC converter (1), and can be connected to an accumulator (B1) by means of a first switch (S1), and connected to a double layer capacitor (DLC) by means of a second switch (S2). The accumulator (B1) is either connected to the double layer capacitor (DLC) by means of a control circuit (PWM), or the accumulator (B1) and the double layer capacitor (DLC) are connected to a bidirectional DC/DC converter (3) and to a second accumulator (B2) by means of a third switch (S3) and a fourth switch (S4).

Abstract: In order to achieve efficient utilization of components required for the generator operation, during the run-up of a turboset having a gas turbine, a generator and also a rectifier exciter, the latter is operated as an asynchronous generator, via which the rotor winding of the generator is supplied with direct current. As a result, neither slip rings nor a separate starting motor are required for the start-up of the turboset.

Abstract: The invention relates to a turbomachine of axis X including a compressor and an integrated starter/generator. The field magnetic circuit of the starter/generator is mounted in the bore of at least one disk of the compressor and surrounds the secondary magnetic circuit which is secured to a cylindrical shroud provided on the support structure for the bearing of the compressor. The invention applies in particular to single-shaft or multi-shaft turbomachines.

Abstract: Two low-voltage energy storage devices (B1 and B2) are provided in an arrangement that ensures, on the one hand, a high start power in the vehicle electrical system, resulting from being connected to a higher-level voltage, for a starter generator (SG) that is coupled to an internal combustion engine. The arrangement additionally ensures, on the other hand, full compatibility with low-voltage vehicle electrical system consumers (VB). The arrangement allows the two low-voltage energy storage devices (B1 and B2), either separately or when connected in parallel, to supply the vehicle electrical system consumers (VB) with a low voltage. In addition, the arrangement allows the two low-voltage energy storage devices (B1 and B2), when connected in series, to provide the high start power with increased voltage and correspondingly reduced current intensity at least for a cold start of the starter generator (SG).

Abstract: A starter generator for an internal combustion engine including: a rotating electric machine having a magnet rotor mounted to a crankshaft of the internal combustion engine, and a stator with a three-phase first armature coil and a three-phase second armature coil; a first battery and a second battery connected in series or in parallel; a first driver circuit provided between the first armature coil and the first battery, and a second driver circuit provided between the second armature coil and the second battery; and an inverter that converts voltages of the first battery and the second battery into an AC voltage, wherein drive currents are supplied to the first armature coil and the second armature coil from the first battery and the second battery through switch circuits in the first driver and the second driver, when the engine is started, and induced voltages of the first armature coil and the second armature coil are supplied to the batteries through rectifier circuits in the first driver and the second

Abstract: The invention relates to a generator system for a motor vehicle, which comprises an asynchronous generator and a converter. The converter serves for the production of converter output voltages from a direct current source, which form a three-phase system which, inside the machine, produce a rotating field suitable for the generator function for the formation of rotating fields suitable for the generator function. The converter output voltages thereby have a frequency—referred to in the following as a WRA frequency—which is changeable in dependence on the range of rotational speed of the generator. The voltage curve of the converter output voltages can be broken down into a primary component with a sinusoidal voltage curve of the WRA frequency and into at least one additional secondary component with a sinusoidal voltage curve with an odd-numbered multiple of the WRA frequency.

Abstract: In the case of an engine automatic stop and start system in which an engine is stopped while a vehicle is stopped and the engine is started when the vehicle is started, it is necessary to shorten an engine starting time when a driver desires to move the vehicle. Further, it is desirable to efficiently compensate the electric power consumed by the starter. The vehicle contains an existing low voltage power source and a high voltage power source with an excellent charging efficiency. When the engine switches from a running condition to a stopped condition while the vehicle is stopped, a change-over switch switches and applies the voltage of the high voltage power source to a starter motor. This causes the starter motor to rotate at high speeds, thereby starting the engine very quickly. Therefore, it is possible to reduce overall energy losses and improve vehicle fuel consumption.

Abstract: A method and apparatus are disclosed for controlling a genset having an engine and an alternator in order to prevent an excessive change in a speed of the engine because of a sudden change in a load on the alternator. The method includes obtaining a first measured value of an actual AC output power of the alternator at a genset controller during a first time period, and obtaining a second measured value of the actual AC output power of the alternator at the genset controller during a second time period. The method further includes determining at the genset controller a first output power based upon at least the first measured value, and a second output power based upon at least the second measured value.

Abstract: A starter device (1) for an internal combustion engine (2) is provided that comprises an electric starter motor (3), a power supply (16), and an activating unit (4) for the starter motor (3). The activating unit comprises circuit-breaker electronics (6) and a control unit (5) for the circuit-breaker electronics (6). Sensors are provided to register physical parameters relevant to the starting power of the starter motor (3) in order to adapt the start characteristic line of the starter motor (3) in optimal fashion within permissible limit values of the physical parameters.

Abstract: The invention is directed to a starter system for an internal combustion engine, comprising an electric starter; a starter battery for warming up or starting the combustion engine; a temperature measuring device for measuring the temperature of the starter battery; a power electronics module, which actively varies the magnitude of a discharge current drawn from the starter battery for the purpose of warming up or starting the engine; and a control device, feeding the power electronics module with the value of the discharge current to be varied, where, at low battery temperatures, the maximum discharge current is lower than at high temperatures. The invention is also directed to a method for starting an internal combustion engine.

Abstract: Two low-voltage energy storage devices (B1 and B2) are provided in an arrangement that ensures, on the one hand, a high start power in the vehicle electrical system, resulting from being connected to a higher-level voltage, for a starter generator (SG) that is coupled to an internal combustion engine. The arrangement additionally ensures, on the other hand, full compatibility with low-voltage vehicle electrical system consumers (VB). The arrangement allows the two low-voltage energy storage devices (B1 and B2), either separately or when connected in parallel, to supply the vehicle electrical system consumers (VB) with a low voltage. In addition, the arrangement allows the two low-voltage energy storage devices (B1 and B2), when connected in series, to provide the high start power with increased voltage and correspondingly reduced current intensity at least for a cold start of the starter generator (SG).

Abstract: A generator/starter system for starting an engine and for tapping power from the engine in order to generate electricity includes a squirrel cage rotor, a main stator winding, an auxiliary stator winding, and an excitation source. The main stator winding is magnetically coupled to the squirrel cage rotor so as to provide an AC output in response to rotation of the squirrel cage rotor and so as to rotate the squirrel cage rotor in response to an AC input. The auxiliary stator winding is magnetically coupled to the squirrel cage rotor so as to provide excitation current when the main stator winding is providing the AC output. The source of excitation current is coupled to the auxiliary stator winding.

Abstract: A method for optimizing the starting torque and for reducing the electrical power usage of a starter-generator of an internal combustion engine. The starter-generator is configured as an electrical machine, which is operated using an inverter or an indirect a.c. converter the electrical power Pel being made available by a vehicle battery. Before the imaginary turning point (31) on the torque curve (4) of the starter-generator is reached, the phase current of the electrical machine is limited. The electrical machine is controlled from the point at which a limiting point (32) is reached along the electrical limiting power curve (30) (P=const), such that the electrical power Pel corresponds to that at the stationary operating point (25) of the electrical machine.

Abstract: An electrical machine (10) suitable for use as a starter/alternator for an automotive vehicle, has an inverter circuit (12), a rectifier circuit (14), and a stator circuit (16) that couples the inverter circuit (12) to the rectifier circuit (14). In addition, a switch circuit (18) having a first switch, switch A, and a second switch, switch B, is used to couple inverter circuit (12) to rectifier circuit (14). By controlling the operation of switch circuit (18) so that in a start up mode the switches are closed and in a generating mode the switches are open, a high output torque may be obtained from the electrical machine while a wide operating speed range may be also achieved.

Abstract: A generator apparatus driven by an internal combustion engine and comprising a revolution controller to control a revolution of the internal combustion engine so as to maintain a desired value of a terminal voltage of a battery which is charged by an output of an AC generator driven by the internal combustion engine while controlling an actuator for operating a fuel supply adjuster, an engine start controller to give a start instruction from a timer circuit to start means when the battery is discharged until the terminal voltage is lowered to a set value and an engine stop controller to give a stop instruction from the timer circuit to stop means when the battery is perfectly charged by the operation of the engine until the revolution of the engine is lowered to a stop revolution thereof whereby the starting and stopping operations of the engine are controlled without undercharging and overcharging the battery.

Abstract: In the case of an engine automatic stop and start system in which an engine is stopped while a vehicle is stopped and the engine is started when the vehicle is started, it is necessary to shorten an engine starting time when a driver desires to move the vehicle. Further, it is desirable to efficiently compensate the electric power consumed by the starter. The vehicle contains an existing low voltage power source and a high voltage power source with an excellent charging efficiency. When the engine switches from a running condition to a stopped condition while the vehicle is stopped, a change-over switch switches and applies the voltage of the high voltage power source to a starter motor. This causes the starter motor to rotate at high speeds, thereby starting the engine very quickly. Therefore, it is possible to reduce overall energy losses and improve vehicle fuel consumption.

Abstract: A starter generator for an internal combustion engine serving as a starter motor when the internal combustion engine should start and as a generator after the internal combustion engine starts and comprising a magnet rotor and a stator having a plural of coils, a plural of switch circuits to switch a current flowing through the coils and a switch controller to control switch elements of the switch circuits whereby the current flows through all the coils by controlling the switch circuits in accordance with a position of the rotor when the engine should start to thereby produce a large torque and the current flows through one or some of the coils via a rectifying circuit of rectifying diodes provided in some switch circuits after the engine starts to thereby charge the battery.

Abstract: A torque control system for a lean burn engine utilizing a supplemental torque apparatus that is operable during the engine mode transition from a lean air/fuel ratio to a rich air/fuel ratio. The supplemental torque apparatus 34, STA, operates to maintain the basic engine torque equation: Te+Tsta=Td such that the device or a electrically connected battery 38 absorbs extra engine torque during a predetermined time period and generates engine torque at times other than the predetermined time period. During the predetermined time period, a Lean NOx Trap 26 in the exhaust system is purged.

Abstract: A fuel management control method for a hybrid electric vehicle drive having an internal combustion engine and an electric motor arranged in parallel such that both can propel the vehicle; the system including an electric motor driven fuel pump and a programmable microprocessor; and wherein the method further includes monitoring vehicle speed and sensing braking pressure and directing signals of both vehicle speed and braking to the microprocessor and processing such inputs in accordance with an aggressive fuel management program including shut-off of fuel flow to the gas engine in response to vehicle braking at vehicle speeds above a predetermined maximum hysteresis speed and maintaining the fuel shut off during vehicle coasting above a predetermined speed while controlling the electric motor to provide regenerative braking or vehicle start during such fuel shut off modes of operation.

Abstract: A starter/alternator system 40 for an automotive vehicle 10 with an internal combustion engine 12 has a crankshaft 50 coupled to pistons 16 and a flywheel 90 coupled to the crankshaft 50. The vehicle 10 also has a transmission 20 having an input shaft 22. A starter/alternator 42 has a rotor 48 and a stator 46. The rotor 42 is fixedly coupled to the input shaft 22. A clutch 52 selectively couples the input shaft 22 and the crankshaft 50. The rotor 48 has a rotor carrier 70 and a rotor coil 71. The rotor carrier 70 has a radially extending portion 72 and an annular portion 74 spaced from the input shaft 22. The annular portion 74 has an inner surface 80 and outer surface 82 wherein the rotor coil 71 is fixedly coupled to the outer surface 82.

Abstract: A device for starting a gas turbine in an aircraft includes an electrical power supply delivering a direct current and a drive electric motor connected to the power supply, independent of the turbine to be started and having an output shaft mechanically coupled to an input shaft of the turbine to rotate with it. The drive electric motor is a three-phase alternating current synchronous motor and is controlled by an inverter connected to the power supply. Applications include situations in which the turbine to be driven is a high-power turbine.

Abstract: A synchronous generator is disclosed having main power windings and auxiliary power windings, where the auxiliary power winding is coupled to a variable frequency drive system. The variable frequency drive causes the generator to function as a motor and turn a drive shaft to start a gas turbine. Switching circuits are used to connect and disconnect the auxiliary windings of the generator with the variable frequency power supply.