Starting And Generating Dynamo Patents (Class 290/46)
  • Publication number: 20100133832
    Abstract: An open-rotor gas turbine engine comprising a starter/generator, a first spool and a second spool, the second spool is of a lower pressure than the first spool; wherein the starter/generator is connected to the first and second spools via first and second clutches respectively. The method of operating the open-rotor engine comprises the step of supplying power to the starter/generator to drive the first spool via the first clutch to start the engine and, once the engine is self-propelling, a step of driving the starter/generator from the second spool via the second clutch to generate electricity.
    Type: Application
    Filed: October 28, 2009
    Publication date: June 3, 2010
    Applicant: ROLLS-ROYCE PLC
    Inventor: David C. Butt
  • Publication number: 20100127496
    Abstract: An electrical machine is embedded into the compressor assembly of a gas turbine engine. An electrical system interface module distributes electrical current to and from the embedded electrical machine for starting the gas turbine engine and for operating accessory components. Accordingly, the gas turbine engine and accessory components can be started and operated without a power-takeoff shaftline and without an external accessory gearbox.
    Type: Application
    Filed: January 27, 2010
    Publication date: May 27, 2010
    Applicant: ROLLS-ROYCE CORPORATION
    Inventors: PHILIP BURKHOLDER, RIGOBERTO J. RODRIGUEZ, STEVEN GAGNE, KENNETH M. PESYNA
  • Patent number: 7713157
    Abstract: An alternator system includes an input shaft, a planetary gear assembly, a variable resistance generator, and a control unit. The alternator assembly is structured to produce an output current having a frequency. The planetary gear assembly disposed between, and operatively coupled to, the input shaft and the alternator assembly. The planetary gear assembly has a planet gear carrier body with an outer radial surface having teeth. The variable resistance generator has an external generator shaft with a generator gear. The generator gear is structured to engage the outer radial surface teeth. The control unit structured to detect the frequency of the alternator assembly output current and to alter the resistance of the generator. The control unit is structured to maintain the frequency of the alternator assembly output current within a selected range by increasing or decreasing the resistance of the generator.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: May 11, 2010
    Assignee: Eaton Corporation
    Inventors: Jerome Kenneth Hastings, Roger James Briggs, Vijay Bhavaraju
  • Publication number: 20100058731
    Abstract: A turbine engine, for example for a helicopter, including a gas generator and a free turbine driven in rotation by the gas flow generated by the gas generator. The turbine engine further includes a motor/generator coupled to a shaft of the gas generator, to provide a quantity of additional rotational kinetic energy to the shaft during a stage of turbine engine acceleration, or to draw a quantity of rotational kinetic energy from the shaft during a stage of turbine engine deceleration.
    Type: Application
    Filed: April 4, 2008
    Publication date: March 11, 2010
    Applicant: TURBOMECA
    Inventors: Edgar Haehner, Gerald Senger
  • Publication number: 20100038961
    Abstract: A starting system for aircraft engines employs power from multiple power sources. Each engine is started with a starter motor that is driven by the same multiple power sources which collectively provide starting power. As engine speed increases during each starting cycle a voltage boost is progressively provided by a boost converter. The starting system allows use of voltages higher than output voltage of the power sources while allowing the power sources to remain connected to a main aircraft power distribution bus.
    Type: Application
    Filed: November 14, 2007
    Publication date: February 18, 2010
    Inventors: Rocco Divito, Nicolae Morcov, Ray McGinley
  • Publication number: 20100024434
    Abstract: A gas turbine engine arrangement (1) comprises a first gas turbine engine (10), a second gas turbine engine (70), a differential gearbox (57) and an electrical generator (112). The differential gearbox (57) has a first input drive (54), a second input drive (78) and an output drive (110). The output drive (110) of the differential gearbox (57) is arranged to drive the electrical generator (112) via an external, accessory, gearbox (56). The external, accessory, gearbox (56) drives other accessories (116, 120). The first gas turbine (10) is arranged to drive the first input drive (54) of the differential gearbox (57) and the second gas turbine engine (70) is arranged to drive the second input drive (78) of the differential gearbox (57). The electrical generator (112) and accessories (116, 120) are driven at a constant frequency speed/frequency.
    Type: Application
    Filed: February 25, 2009
    Publication date: February 4, 2010
    Applicant: ROLLS-ROYCE PLC
    Inventors: Gareth E. Moore, David R. Trainer, David P. Scothern, David S. Knott, Paul Simms
  • Publication number: 20100013242
    Abstract: An engine combination for generating forces with a gas turbine engine generating force, and an internal combustion engine provided in the combination as an intermittent combustion engine generating force having an air intake, there being a plurality of air transfer ducts each extending from a different location in the gas turbine engine so as to be capable to provide air in each of those air transfer ducts at one end thereof at pressures differing from one another and connected at the other end of each to the air intake to transfer air thereto.
    Type: Application
    Filed: May 18, 2007
    Publication date: January 21, 2010
    Applicant: United Technologies Corporation
    Inventors: Frederick M. Schwarz, Brian M. Fentress
  • Publication number: 20100013223
    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.
    Type: Application
    Filed: July 15, 2009
    Publication date: January 21, 2010
    Applicant: EUROCOPTER
    Inventor: Bernard Certain
  • Publication number: 20090322088
    Abstract: The torque transmission system for an aircraft engine permits a starter-generator to drive the engine on starting at a speed reducing ratio. Once the engine is running, the engine then drives the starter-generator also at a speed reducing ratio.
    Type: Application
    Filed: January 30, 2008
    Publication date: December 31, 2009
    Inventor: Kevin Allan Dooley
  • Patent number: 7638893
    Abstract: Wind power installations were initially always erected in the form of individual units and it is only in recent years that, caused also by administrative and building regulations, wind power installations are frequently installed in wind parks. In that respect a wind park in its smallest unit is an arrangement of at least two wind power installations, but frequently markedly more. By way of example mention may be made of the wind park at Holtriem (East Frisia) where more than 50 wind power installations are set up in an array. It is to be expected that the number of units and also the installed power of the wind power installations will also increase greatly in the forthcoming years. In most cases the wind potential is at its greatest in regions of the power supply networks with a low level of short-circuit power and low population density.
    Type: Grant
    Filed: September 21, 2002
    Date of Patent: December 29, 2009
    Inventor: Aloys Wobben
  • Publication number: 20090289456
    Abstract: A gas turbine engine arrangement comprises a core engine, a power turbine and a propulsor. The core engine comprises at least one compressor and at least one turbine arranged to drive the at least one compressor and the core engine is arranged in a casing. The power turbine is positioned downstream of the at least one turbine and the power turbine is arranged to drive the propulsor. An electrical machine is arranged upstream of the at least one compressor. The electrical machine comprises a stator and a rotor and the electrical machine comprises a motor/generator. A first clutch selectively connects the rotor of the electrical machine to the power turbine and a second clutch selectively connects the rotor of the electrical machine to the at least one compressor of the core engine.
    Type: Application
    Filed: May 7, 2009
    Publication date: November 26, 2009
    Applicant: ROLLS-ROYCE PLC
    Inventors: Adam John McLoughlin, Stephen John Mountain
  • Patent number: 7592786
    Abstract: A rotor resistor and switch combination may cause a starter/generator device to function as an asynchronous device when in a start mode. Thus, starting torque may result. A starter/generator device may include an exciter rotor winding, a main rotor winding, and a resistor and switch combination positioned between the exciter rotor winding and the main rotor winding to control a flow of current in the main rotor winding during a start mode of the starter/generator device. A method of optimizing starting torque of a starter/generator device without a start controller unit during a start mode may include providing a main rotor winding of the starter/generator device, and providing a control to control a flow of current in the main rotor winding during the start mode.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: September 22, 2009
    Assignee: Honeywell International Inc.
    Inventors: Mingzhou Xu, Cristian E. Anghel, Wayne T. Pearson
  • Publication number: 20090174188
    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.
    Type: Application
    Filed: March 16, 2009
    Publication date: July 9, 2009
    Inventors: Hao Huang, David Karipides, Mohamed Abbas, David Tsui
  • Publication number: 20090058087
    Abstract: A rotary electric machine for a vehicle includes a rotor, a stator and a rectifying device for current AC/DC conversion. The machine operates as a motor and a generator. The machine comprises a multi-phase windings, switching elements forming a rectifying device, and a controller for controlling a current path of the multi-phase windings by switching the switching elements on and off to perform two modes of operation. The switching elements are switched such that one end of each windings is connected to either a high electrical potential end or a low electrical potential end of the rectifying device and the other ends of the windings connected together to be the same electrical potential are connected to either the high electrical potential end or the low electrical potential end in the rectifying device.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 5, 2009
    Applicant: DENSO CORPORATION
    Inventors: Atsushi Umeda, Takatoshi Inokuchi
  • Publication number: 20090039652
    Abstract: Embedding electrical machines in gas turbine engines has particular advantages by avoiding the need to provide mechanical connections. However, electrical machines such as switched reluctance electrical machines require relatively large electrical capacitors to accommodate and filter voltage variations in the phases of the electrical machine. Generally, the electrical machine will have a motoring period or generating period with a spacer period between. By injecting electrical current as electrical power in the spacer period, there is limited effect upon net torque within the electrical machine or electrical power generation. However, such stored electrical power in an inductive winding element of the electrical machine augments power pulses provided by a power source incorporating an electrical capacitor. In such circumstances, a smaller sized electrical capacitor can be used.
    Type: Application
    Filed: July 21, 2008
    Publication date: February 12, 2009
    Applicant: ROLLS-ROYCE PLC
    Inventors: David Reginald Trainer, John James Anthony Cullen, Stephen Andrew Long
  • Patent number: 7449795
    Abstract: An electric power generation system 10 with a combustion turbine 12 as a prime mover for a main generator 16 is provided. The power generation system includes a dynamoelectric machine 30 that may be used both as the starting motor and as a generator to provide a source of excitation power that is essentially independent of a local power system and thereby not susceptible to voltage fluctuations and/or power interruptions.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: November 11, 2008
    Assignee: Siemens Energy, Inc.
    Inventor: Robert J. Nelson
  • Patent number: 7400056
    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.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: July 15, 2008
    Assignee: Honeywell International Inc.
    Inventors: Ray M. McGinley, Cristian E. Anghel, Mingzhou Xu
  • Publication number: 20080054644
    Abstract: In order to provide a high electric power for an aircraft via a generator driven by the engine, an additional free turbine is included in the hot-gas flow of the engine, which—equipped with generator-starter magnets (9) and surrounded by annularly arranged generator-starter coils (12)—forms a generator-starter turbine (5) and is connected to the high-pressure shaft (1) via an overrunning clutch (15), and hence, is also used for starting the engine.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 6, 2008
    Inventor: Rudolf Lueck
  • Patent number: 7301310
    Abstract: The present invention provides an apparatus and methods for providing constant voltage from a permanent magnet generator at varying prime mover speeds or under varying loads. A constant voltage permanent magnet generator includes a housing, a magnetized rotor, a prime mover operationally coupled with the rotor, a stator, a main winding coupled to the stator, and an excitation winding also coupled to the stator. A controllable three-phase inverter may be coupled to the excitation winding and a control system operationally coupled to the main winding for measuring the voltage of the main winding. The control system is further operationally coupled between the power source and the controllable three phase inverter to provide a supplemental current to the excitation winding such that a combined current through the main winding and the excitation winding produces a constant voltage from the generator.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: November 27, 2007
    Assignee: Honeywell International, Inc.
    Inventors: Evgeni Ganev, William H. Warr, Carol A. Oximberg
  • Patent number: 7268522
    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
    Type: Grant
    Filed: May 20, 2006
    Date of Patent: September 11, 2007
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Donal E. Baker
  • Patent number: 7183750
    Abstract: The vehicle power-generation control unit has a first function enabled when a control signal received from outside designates a first mode to control an exciting current such that an output power of a vehicle generator is kept at a value specified by the control signal, a second function enabled when the control signal designates a second mode to control the exciting current such that a generation voltage of the vehicle generator is kept at a target voltage specified by the control signal, and a third function enabled when the control signal designates the first mode to monitor whether or not the generation voltage is in a predetermined voltage range and to disable the first function in order to control the exciting current such that the generation voltage is kept at a preset voltage upon detecting that the generation voltage is out of the predetermined voltage range.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: February 27, 2007
    Assignee: Denso Corporation
    Inventor: Tadatoshi Asada
  • Patent number: 7170263
    Abstract: An apparatus for controlling an on-vehicle generator is provided. The apparatus comprises a switching element, current detecting unit, setting unit and driving unit. The switching unit turns on/off an exciting current to an exciting winding of the generator, the switching element being driven responsively to a driving signal having an adjustable duty ratio. The setting unit sets the duty ratio based on (i) a difference between an output voltage of the generator and a target voltage value and (ii) a condition in which an electric load is disconnected from the generator, wherein the duty ratio is allowed to lower than a minimum value of the duty ratio depending on a generated state of the generator. The minimum value allows the exciting current to flow at a lower limit detectable by the current detecting unit, The driving unit drives the switching element based on the driving signal.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: January 30, 2007
    Assignee: Denso Corporation
    Inventors: Takaaki Yamamoto, Fuyuki Maehara
  • Patent number: 7129595
    Abstract: An improved hybrid electro-mechanical vehicular transmission includes motor/generator modules assembled from like components. This is accomplished by providing “punch-out” tabs on the motor/generator module housing enabling the housing to be used on either the first or second motor/generator module within a hybrid electro-mechanical vehicular transmission, thus enabling like components to be used within both the first and second motor/generator module.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: October 31, 2006
    Assignee: General Motors Corporation
    Inventors: William S. Reed, James A. Raszkowski, Edward L. Kaiser, Joel E. Mowatt
  • Patent number: 7128061
    Abstract: A centrifugal supercharger is provided. One embodiment of the supercharger comprises a two-piece housing wherein a parting area is substantially aligned with a rotational axis of a drive- or impeller shaft. Another embodiment comprises a sleeve, or intermediate member disposed substantially between the housing and a bearing assembly(s) located within the supercharger housing. Another embodiment comprises a disengagement device located between the supercharger impeller and the engine. The disengagement device allows selective disengagement of the impeller from the engine. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: October 31, 2006
    Assignee: Vortech Engineering, Inc.
    Inventors: James K. Middlebrook, Robert B. Anderson
  • Patent number: 7078826
    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.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: July 18, 2006
    Assignee: Honeywell International, Inc.
    Inventors: Mingzhou Xu, Michael W. Duddeck, Wayne T. Pearson, William M. Scherzinger, David E. Stout
  • Patent number: 7053497
    Abstract: A load monitoring apparatus for monitoring the load applied to a portable generator. The apparatus includes a sensor, and a humanly perceptible indicator that indicates at least one discontinuous load power frequency.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: May 30, 2006
    Assignee: Briggs & Stratton Power Products Group, LLC
    Inventors: Wesley C. Sodemann, Kenny J. Stair, Russell C. Nordman, Paul A. Tharman
  • Patent number: 7004134
    Abstract: A positioning pin is knocked onto a crankshaft of an engine and a key way is formed in a boss of a first flywheel. When an outer rotor type generator is connected with the engine, the boss of the first flywheel is fitted over the crankshaft so as to adjust the positioning pin to the key way. When an inner rotor type generator is connected with the engine, a rotor shaft on which a rotor of a generator is mounted is fitted to a second flywheel so as to adjust the positioning pin to a key way formed in the second flywheel. The ignition angle of the engine is determined by fitting the positioning pin to the key way.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: February 28, 2006
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Masaaki Higuchi
  • Patent number: 6995478
    Abstract: A rotating electrical machine, such as an aircraft starter-generator, that may be operated in either a motor mode or an generator mode. The machine includes a main rotor that is selectively configurable as an M-pole rotor or an N-pole rotor. The machine can also include DC brushes that are selectively moveable into, and out of, electrical contact the main rotor, to thereby electrically couple and decouple a DC power source to and from, respectively, the rotor windings.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: February 7, 2006
    Assignee: Honeywell International, Inc.
    Inventors: Mingzhou Xu, Wei Chen, Michael W. Duddeck, Wayne T. Pearson, William M. Scherzinger
  • Patent number: 6965172
    Abstract: A starter for cranking an internal combustion engine is mainly composed of an electric motor and a magnetic switch having a battery bolt connected to an on-board battery and a motor bolt connected to the electric motor. When the magnetic switch is closed, electric power is supplied to the electric motor to thereby generate a rotational torque for cranking the engine. One end of a motor terminal is electrically connected to the motor bolt, and the other end is led into a motor casing through a rubber insulator supported on the motor casing. The motor terminal includes one or more curved portions having resiliency, and they are positioned between the rubber insulator and the motor bolt. Water penetration into the motor casing is prevented by the rubber insulator, and the vibration of the motor terminal is alleviated by resiliency of the curved portions.
    Type: Grant
    Filed: September 13, 2004
    Date of Patent: November 15, 2005
    Assignee: Denso Corporation
    Inventors: Takeshi Shimoyama, Youichi Hasegawa, Sadayoshi Kajino
  • Patent number: 6940735
    Abstract: A power converter system advantageously employs a modular, bi-directionally symmetrical power converter assembly in a readily customizable configuration to interconnect a direct current power source to a three-phase alternating power grid. Connections external to the power converter assembly are selected to optimize the power converter system for a specific application, such as interconnecting a photovoltaic array to the three-phase electrical power grid. The electrical interconnections of various elements including isolation transformers, voltage sensors, and control switches are optimized to improve efficiency and reliability.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: September 6, 2005
    Assignee: Ballard Power Systems Corporation
    Inventors: Duo Deng, Vijay Bhavaraju
  • Patent number: 6936933
    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.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: August 30, 2005
    Assignee: Volvo Lastvagnar AB
    Inventor: Melvyn Wilmore
  • Patent number: 6919661
    Abstract: The reversible multiphase rotary machine includes a device (3) for supplying current to the windings (12-14) of the stator, which is produced in the form of a mechanical inverter (2) able to be coupled to the aforementioned shaft of the machine and connected to the windings (12-14) of the stator.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: July 19, 2005
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Jean-Marc Dubus, Pierre Mollon
  • Patent number: 6900618
    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.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: May 31, 2005
    Assignee: Denso Corporation
    Inventor: Fuyuki Maehara
  • Patent number: 6897574
    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.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: May 24, 2005
    Assignee: International Rectifier Corporation
    Inventor: Bertrand Vaysse
  • Patent number: 6888263
    Abstract: A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-current power generated by the generator into commercial alternating-current power, and a system-interconnection device (9) for interconnecting output of the inverter device to a commercial AC power supply system (10). The system-interconnection device controls the inverter device based on voltage of the commercial AC power supply system as a criterion such that output current of the inverter device is in phase with the voltage or out of phase with the voltage by a constant phase difference.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: May 3, 2005
    Assignees: Ebara Corporation, Ebara Densan Ltd.
    Inventors: Motoyasu Satoh, Seiichi Ishihara, Noboru Kinoshita, Takahide Ozawa, Shao-jun Zheng, Terence Mckelvey, Tadashi Kataoka
  • Patent number: 6888329
    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.
    Type: Grant
    Filed: June 11, 2003
    Date of Patent: May 3, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaya Inoue, Haruyuki Kometani, Toshiyuki Yoshizawa, Masahiko Fujita, Tsunenobu Yamamoto, Yoshihito Asao, Shinji Nishimura
  • Patent number: 6856032
    Abstract: An engine starting apparatus comprises a starter/alternator assembly operatively coupled to the engine and is 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 an electronic controller provided for controlling the starter/alternator assembly. The starting apparatus further comprises an engine speed sensor for monitoring a rotational speed of the engine that is electrically connected to the electronic controller. 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 engine directly sensed by the engine speed sensor.
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: February 15, 2005
    Assignee: Dana Corporation
    Inventors: Scott Evart Blackburn, Eric Keith Manning
  • Patent number: 6844707
    Abstract: A brushless AC/DC starter generator for use with aircraft engines, the starter generator capable of both providing motive force to start the engine, and generate AC and DC power for aircraft systems. The apparatus includes a main generator, an exciter generator, and a permanent magnet generator.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: January 18, 2005
    Assignee: Pacific Scientific/Electro Kinetics Division
    Inventor: Bernard A. Raad
  • Patent number: 6838778
    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.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: January 4, 2005
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Magdy A. Kandil, Laurence D. Vanek, James L. Abbot
  • Patent number: 6787959
    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.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: September 7, 2004
    Assignee: Mannesmann Sachs AG
    Inventor: Jürgen Weimer
  • Patent number: 6784634
    Abstract: Processor-based field oriented control for brushless doubly-fed induction machine having first and second polyphase stator windings is programmed to operate the machine in various modes, as a motor or a generator, with bumpless switching between operating modes. An electronic power converter controls a current supplied to the first stator winding to control the torque of the machine, with the second stator winding selectively connected to an AC line. Stationary coordinates for in-phase and quadrature current commands are coordinate transformed using a voltage vector for voltage induced on the first polyphase stator winding to control current in the first stator winding, with or without a position sensor. The electronic power converter controls the voltage supplied to the first stator for generating, with the second stator selectively connected to a load. The machine can also be controlled to operate as a singly-fed motor at lower speeds, with the second stator winding shorted.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: August 31, 2004
    Inventor: Edwin A. Sweo
  • Publication number: 20040163860
    Abstract: In a hybrid car, or an electric motor-driven four-wheel-drive vehicle, in which an electric motor is driven directly by an output from a generator, vehicle running performance is enhanced. The output from the generator is controlled so as to maintain a generator torque in a range, in which the vehicle does not stall. Specifically, a driving apparatus for the hybrid car includes a second generator 2 driven by an engine 1 for driving one pair of either front or rear wheels 14, 15, an electric motor 5 driven through directly receiving the output from the second generator 2 and driving the other pair of either the front or rear wheels 14, 15, and a four-wheel-drive control unit 6 controlling driving of the second generator 2 and the electric motor 5. When the engine 1 is in an overloaded condition, the four-wheel-drive control unit 6 limits the output of the second generator 2.
    Type: Application
    Filed: December 19, 2003
    Publication date: August 26, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Norikazu Matsuzaki, Masaru Ito, Tatsuyuki Yamamoto, Takehiko Kowatari
  • Patent number: 6768215
    Abstract: In an engine starter of the present invention, a driving shaft to output a rotating force and a crankshaft of an engine are linked continuously. The engine starter comprises a one-way clutch to prevent an overrun of an armature after the engine starts. In the one-way clutch, a connecting rotation number in which an inner ring and an outer ring change from a disconnected state to a connected state in a decreasing process of engine revolutions is set above a lower limit of the engine revolutions above which the engine under suspension of the fuel supply is able to get restarted by itself by resuming of fuel supply. Therefore, the engine is always able to get restarted quickly even in a low-rotation range.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: July 27, 2004
    Assignee: Denso Corporation
    Inventors: Takahiro Souki, Akira Kato, Masaru Kamiya, Keisuke Tani, Kazuo Masaki
  • Patent number: 6753621
    Abstract: A starter for an internal combustion engine is comprised of an armature, a motor case, a planetary gear speed reduction mechanism connected to an armature shaft, a frame and a partition plate disposed between the motor case and the frame. The partition plate has an armature-shaft hole and a chamber-connection passage between the armature shaft hole and the armature shaft for connecting the motor chamber and the speed reduction chamber. An undulating circumferential groove is formed between the partition plate and the frame to connect the speed reduction chamber and the outside. A long water drainpipe is removed from a starter for a recreational vehicle.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: June 22, 2004
    Assignees: Denso Corporation, Sawafuji Electric Co., Ltd.
    Inventors: Youichi Hasegawa, Yasuo Osawa
  • Patent number: 6664653
    Abstract: A command and control system and method for multiple turbogenerators in a grid parallel system includes a master controller to start, sequence, coordinate power commands, and provide fault handling to each of the individual turbogenerators and the specific control modes. A bidirectional power meter, that measures the load consumption (or production when a turbogenerator system is installed) in a building or application, may also be utilized. This power meter can provide a reference or setpoint to the master controller for controlling the individual turbogenerators.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: December 16, 2003
    Assignee: Capstone Turbine Corporation
    Inventor: Edward C. Edelman
  • Patent number: 6609992
    Abstract: An automotive alternator includes: a stator core 1 having a stator winding 2; front and rear brackets 3 and 4 holding the stator core 1; a rotor core 5 attached to a rotation shaft 7 rotatably mounted on the brackets; a one-way clutch 13 having a driving member 16 and a driven member 14, the driven member 14 fixed to the rotation shaft 7; an overdrive planetary gear mechanism 17 having a sun gear 22, a planet gear 21, and an outer ring gear 24, the sun gear 22 fixed to the rotation shaft, the planet gear 21 attached to the driving member 16, the outer ring gear 24 rotatably supported; an input shaft 19 to which an end of the support shaft 20 of the planet gear 21 is fixed; and an electromagnetic brake 26 blocking rotation of the outer ring gear 24 by energization.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: August 26, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuhiko Kusumoto, Tatsuhiko Mizutani, Yoshinobu Utsumi
  • Patent number: 6512305
    Abstract: An uninterruptible power supply (UPS) system supplies power to computers, medical apparatus or other critical loads when primary power supply falters. The UPS system includes an electrical machine connected to a turbine that can be rotated by a motive fluid from a fluid supply. The electrical machine can be a dual purpose electrical machine (a motor/generator) or a two unit machine (one motor and one generator in a single housing or in separate housings) connected to the turbine. When power is supplied from the primary power supply to the critical load, the electrical machine acts as a motor to rotate the turbine and energy is stored by the turbine rotor in the form of rotational momentum. When power from the primary power supply falters, the rotational momentum of the turbine rotor initially rotates the electrical machine which acts as a generator to provide power to the critical load.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: January 28, 2003
    Assignee: Active Power, Inc.
    Inventors: Joseph F. Pinkerton, David B. Clifton
  • Patent number: 6501190
    Abstract: An accessory device driving apparatus is disposed between an internal combustion engine and an accessory device of a vehicle. The driving apparatus is constructed as a coaxial dual rotor-type electric motor/generator that has two electromagnetically induction-coupled rotors to operate as a motor and a generator. One rotor is coupled with the engine to rotate at a speed higher than that of the engine, and the other rotor is coupled with the accessory device to rotate at a speed higher than that of the accessory device. The rotors are restricted from rotating in a reverse direction opposite a direction of forward rotation of the engine by one-way clutches, respectively.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: December 31, 2002
    Assignee: Denso Corporation
    Inventors: Masahiro Seguchi, Yasuaki Yukawa
  • Patent number: 6484596
    Abstract: The invention relates to a crankshaft starter-generator for an internal combustion engine wherein the starter-generator is drive-coupled to a crankshaft of the internal combustion engine and serves both as the starter and the generator. A stator of the starter-generator is coupled with torsional strength to a motor block of the internal combustion engine. A rotor of the starter-generator is drive-coupled with the crankshaft of the internal combustion engine. A carrier is arranged coaxially with respect to the crankshaft and drive-coupled thereto. The rotor is drive-coupled to the carrier. The rotor and the carrier are arranged coaxially with respect to each other and are coupled to one another with torsional strength. Furthermore, the stator is arranged on the inside, and the rotor is arranged on the outside of the starter-generator.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: November 26, 2002
    Assignee: Kontec GmbH
    Inventor: Christian Puchas
  • Publication number: 20020117860
    Abstract: A power train for a motor vehicle includes a combustion engine, a clutch or other torque-coupling device, a transmission, and an electro-mechanical energy converter that is operable at least as a motor and as a generator. The electro-mechanical energy converter is coupled to the output shaft of the combustion engine through a torque transfer device with at least two rpm ratios that automatically set themselves according to whether the vehicle is operating in a start-up mode or in a driving mode.
    Type: Application
    Filed: October 22, 2001
    Publication date: August 29, 2002
    Applicant: LuK Lamellen und Kupplungsbau Beteiligungs KG
    Inventors: Laszlo Man, Wolfgang Reik, Bruno Muller