Electric Traction Motor Patents (Class 290/9)
  • Patent number: 8299638
    Abstract: Propulsion system for ships and other mobile marine structures, with a driving machine for running an electrical generator, which is further connected to an electrical propulsion motor with connection to a propeller or similar propulsion device. The system can be simplified in that the generator and the propulsion motor are permanently magnetized synchronous machines. The two synchronous machines have substantially the same basic construction, with approximately identical voltage characteristics with regard to frequency, and they are directly connected together with a rigid electrical connection.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: October 30, 2012
    Assignee: Inpower AS
    Inventors: Normann Sandöy, Reidar Vaardal
  • Publication number: 20080202831
    Abstract: A system and for generating power associated with a hybrid vehicle or electrically propelled vehicle comprises a mode selector for selecting at least one of an operational mode and a power generation mode. A controller activates one or more switches to disconnect an inverter output from a drive electrical path to a drive motor and to connect the inverter output to a power generation path if the vehicle is in the power generation mode. An inverter inverts a direct voltage signal to an alternating current signal with a desired frequency in the power generation path. A transformer increases a voltage level of the alternating current signal to a desired voltage level.
    Type: Application
    Filed: February 28, 2008
    Publication date: August 28, 2008
  • Publication number: 20080169140
    Abstract: A machine for addition of motive force to a vehicle, with rotor plate, rotor arms, rotor permanent magnets, stator plate, stator columns, stator electro magnets, and battery, cell, or other energy storage device.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 17, 2008
    Inventor: Charles Hampton Perry
  • Patent number: 7224132
    Abstract: A portable range extender is provided for an electric vehicle having a vehicle controller, and an electric traction motor powered by a battery. The portable range extender has an engine, a dynamoelectric machine coupled to the engine by a shaft and electrically connectable to the vehicle, and a range extender controller for controlling operations of the range extender independently of the vehicle controller. The range extender controller monitors voltage of the battery to automatically activate the range extender when the battery voltage is less than a first threshold value and automatically deactivate the range extender when the battery voltage reaches a second threshold value. The dynamoelectric machine operates as a motor for starting the engine when the battery voltage is less than the first threshold value. In response to prescribed engine conditions, the range extender controller operates the dynamoelectric machine as a generator driven by the engine to generate electric power supplied to the vehicle.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: May 29, 2007
    Assignee: Wavecrest Laboratories, LLC.
    Inventors: Chahee Peter Cho, Eun S. Kim
  • Patent number: 7205731
    Abstract: A motor control device for controlling an electric motor (1,6) installed in a vehicle, is disclosed. The motor has a field winding (101,601). The motor control device has a battery (4) charged by power at a first voltage (Vb), an voltage increase/decrease inverter (3) capable of increasing the first voltage from the battery, an excitation control circuit (102, 106) which allows or disallows supply of the exciting current to the field winding (101,601), a sensor (35,41–48) which detects a state of the vehicle, and a controller (8). The controller (8) determines whether or not to start the motor (1,6) based on a signal from the sensor (41–48). When the motor is to be started, the controller (8) allows supply of exciting current by the excitation control circuit (102, 106) and controls the voltage increasing circuit so that the first voltage is increased to a second voltage higher than the first voltage (Vb).
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: April 17, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Kazutoshi Nagayama
  • Patent number: 6989644
    Abstract: The regenerative braking method and system for an electric vehicle in which regeneration current is calculated and controlled using control of an air conditioning system to consume a portion or all of the surplus regeneration power, thereby enhancing braking performance and feel. Control includes calculation of a regeneration current and comparison of the regeneration current to battery current to calculate the surplus regeneration power.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: January 24, 2006
    Assignee: Hyundai Motor Company
    Inventor: Tae Woo Kim
  • Patent number: 6943460
    Abstract: A control device for a hybrid vehicle, the hybrid vehicle comprising an engine and a motor as power sources, the control device including: a battery device sending energy to and receiving energy from the motor, a temperature sensor for measuring the temperature of the battery device; a control section which is adapted to execute a warming control operation for the battery device when the temperature of the battery device is low; and a determination section for determining whether a cylinder deactivation operation is permitted for the engine depending on the running state of the engine. The control section executes a vibration control operation for the engine by operating the motor so as to reduce vibration of the engine when it is determined by the determination section that the partial cylinder deactivation operation is permitted for the engine, and to perform the warming control operation for the battery device by executing a vibration control operation for the engine.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: September 13, 2005
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Teruo Wakashiro, Kohei Hanada, Takahiro Yonekura, Makoto Kishida, Tomohiro Nishi, Kazuhiro Hara
  • Patent number: 6933622
    Abstract: A diesel-electric locomotive includes an assembly including a diesel engine and a generator, a drive unit and a control device, connectable to control devices of other locomotives. Further, a traction grouping includes at least two such diesel-electric locomotives, the locomotives being connected to one another by a control connection. There is provision for a power line to be present with terminals for power lines of other locomotives. In the traction grouping, the locomotives are connected to one another by a power line.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: August 23, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ulrich Foesel, Christian Gritsch, Heinz Hofmann, Gyoergy Papp
  • Patent number: 6921984
    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
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: July 26, 2005
    Assignee: Jungheinrich Aktiengesellschaft
    Inventor: Andreas Rogg
  • Patent number: 6914341
    Abstract: The inertially aided electric generator may efficiently produce electrical energy. An electric generator may have a rotatable generator shaft with a first pulley attached. There may be a rotatable shaft having a shaft pulley attached and a shaft belt disposed on the first pulley and the shaft pulley. A second pulley may be attached to the generator shaft. A motor may have a rotatable motor shaft with a motor pulley attached and a motor belt may be disposed on the second pulley and the motor pulley. A power source may be in electrical communication with the motor.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: July 5, 2005
    Inventor: Stephen McIntyre
  • Patent number: 6831445
    Abstract: An automotive alternator is provided which includes a rectifier, a circulating circuit, and a controller. The circulating circuit is connected in parallel to a field winding to circulate the field current in the event that supply of the field current to a field winding is cut. The circulating circuit consists of a first circuit formed by a diode and a second circuit working to enhance attenuation of the field current. The controller works to select the second circuit when a voltage of the output of the rectifier exceeds a reference value and select the first circuit when the voltage of the output of the rectifier is less than the reference value.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: December 14, 2004
    Assignee: Denso Corporation
    Inventor: Makoto Taniguchi
  • Patent number: 6490511
    Abstract: A torque based monitor method, apparatus, and system, for a torque splitting hybrid electric vehicle (HEV) powertrain and regenerative brake 54 system. The preferred powertrain configuration includes an internal combustion engine 20, generator 32, and electric traction motor 36 combined to produce the vehicle's output shaft torque. The invention has a set of vehicle state sensors and communication interfaces connected independently to a main controller 200 and an independent plausibility check (IPC) 202. The IPC monitors and mitigates the powertrain output shaft torque (OST) by reducing powertrain torque when the detected OST is greater than the desired OST. The IPC has a second mode of operation to shut down the powertrain OST of the HEV powertrain when a fault or failure is detected. Additional features include a quizzer 204 function to continuously verify the functionality of the IPC.
    Type: Grant
    Filed: November 10, 2000
    Date of Patent: December 3, 2002
    Assignee: Ford Motor Company
    Inventors: Abbas Raftari, Deepa Ramaswamy, Jerry D. Robichaux
  • Publication number: 20020057074
    Abstract: When a transistor is turned ON, a predetermined voltage VCL is applied to a minus terminal of a voltage comparator through a C terminal. A predetermined voltage Vd (Vd>VCL) is applied to a plus terminal of the voltage comparator, and an output of the voltage comparator changes from a low level to a high level. Such change is detected by a trigger detection circuit so as to activate a timer circuit, and an output of the timer circuit transitions to the high level during a predetermined time. Thereby, a transistor is changed to an on-state, a reference voltage Vb of an adjustment voltage applied to a plus terminal of a voltage comparator is set generally to 0V, and a transistor is turned OFF, so as to temporarily suspend a power generation state of a vehicular generator.
    Type: Application
    Filed: November 7, 2001
    Publication date: May 16, 2002
    Inventors: Tooru Aoyama, Koji Tanaka
  • Patent number: 6124645
    Abstract: A hill-holding arrangement for an electrically driven vehicle includes a vehicle with a "gas pedal" which generates a torque command signal T.sub.CMD. A switch (314) couples T.sub.CMD to a motor controller (316, 14) which drives the motor (40) and therefore the vehicle. When the "gas pedal" calls for zero torque, and the vehicle speed is zero, the switch responds to logic (FIG. 5), and substitutes a position-holding torque command signal T.sub..theta. for the operator-controlled torque command signal T.sub.CMD. Position controlling torque command T.sub..theta. is generated by a controller (312) which receives a position signal representative of the angular position .theta. of the rotor. The position-holding torque control loop then produces such torque as may be required to prevent the rotor of the motor from moving from its commanded position.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: September 26, 2000
    Assignee: Lockheed Martin Corporation
    Inventors: Christopher Charles Jones, Timothy Michael Grewe
  • Patent number: 5977648
    Abstract: An electric power generating system comprises a low reactance, large airgap permanent magnet generator driven by a hydraulic motor to generate a poly-phase AC output voltage. Because the permanent magnet generator is a low reluctance, large airgap machine, the output voltage regulation is low over the desired loading range of the system. The output voltage is controlled within acceptable limits by trimming the output speed of the hydraulic motor through the use of a servovalve. The control for the servovalve senses a parameter of output power and generates a speed control signal to compensate for deviations in the generator output. The system includes protection circuitry which monitors at least one parameter of the output power. This protection circuitry generates an output protection signal in response to a deviation in the monitored parameter which exceeds predetermined limits.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: November 2, 1999
    Assignee: Sundstrand Corporation
    Inventors: George H. Seffernick, Mahesh J. Shah, Barry L. Maltby
  • Patent number: 5923093
    Abstract: A hybrid drive system for a motor vehicle, including an engine, a motor/motor, an automatic transmission disposed between the engine and a vehicle drive wheel, a regenerative braking device for applying to the vehicle a regenerative braking force corresponding to an amount of electric energy generated by the motor/generator during an operation of the motor/generator by a kinetic energy of the running vehicle, and at least one of (a) a shift inhibiting device for inhibiting a shifting action of the automatic transmission during an operation of the regenerative braking device so as to prevent a change of an engine braking force applied to the vehicle, (b) a braking shift control device which is operated when the regenerative braking device is inoperable to provide the required regenerative braking force, for changing the speed ratio of the automatic transmission to increase the engine braking force, or operated prior to the operation of the regenerative braking device, for controlling the speed ratio of the tra
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: July 13, 1999
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga, Ryuji Ibaraki, Hiroshi Hata, Tsuyoshi Mikami
  • Patent number: 5847469
    Abstract: A hybrid vehicle drive system including an engine, an electric motor operated by an electric energy stored in a storage device, a power transmission having a rear-drive position, a shift lever for selecting the rear-drive position, a rear-drive shifting device for placing the power transmission in the rear-drive position when the shift lever is operated to a reverse position for selecting the rear-drive position, and a rear-drive mode control device which is operated when the shift lever is operated to the reverse position, for operating the electric motor to drive the vehicle in the rearward direction when the amount of the electric energy stored in the storage device is not smaller than a predetermined lower limit, and for operating the engine to drive the vehicle in the rearward direction when the stored electric energy amount is smaller than the lower limit.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: December 8, 1998
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Yutaka Taga
  • Patent number: 5659204
    Abstract: A locomotive throttle controller having a central processor unit which generates an analog signal for control of dynamic braking and includes an analog output driver which supplies the dynamic brake reference voltage. Such analog output driver includes a device for receiving an analog signal from the central processor unit and for converting such analog signal into an analog voltage signal. The analog output driver provides an arrangement for using such analog voltage signal to provide a regulated voltage output to a trainline which controls the dynamic braking. Incorporated into the output driver is a protection arrangement to protect it from reverse voltages on such trainline and an arrangement for protecting such output driver from excess current demand of the trainline.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: August 19, 1997
    Assignee: Westinghouse Air Brake Company
    Inventors: Craig A. Miller, Paul J. Kettle, Jr., Vincent Ferri
  • Patent number: 5629567
    Abstract: A speed control system for an AC electric locomotive of the type having a plurality of wheel-axle sets with each wheel-axle set being coupled to an independently controllable AC electric traction motor and each motor having a corresponding speed sensor, each speed sensor providing a pair of signals which are resolvable to determine the speed and direction of rotation of the associated motor rotor, wherein the control system is arranged for maintaining torque control during failure of one of the signals from an associated speed sensor. The system detects the presence of each of the pair of signals from each speed sensor and responds to detection of only one of the pair of signals from one of the speed sensors for setting motor speed in response to the detected one of the signals. Direction is then determined by using signals from another of the speed sensors.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: May 13, 1997
    Assignee: General Electric Company
    Inventor: Ajith K. Kumar
  • Patent number: 5005659
    Abstract: An electrically propelled vehicle with hydraulic power steering supplied from an electricaly driven pump includes a sensor for sensing any voltage generated in the traction motor of the vehicle, for example, when it is coasting, and after comparing this generated voltage with a reference voltage a sensor for signalling the actuation of the power steering pump when the generated voltage exceeds the reference voltage.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: April 9, 1991
    Assignee: Yale Materials Handling Limited
    Inventors: John Jones, Rinaldo G. Uccellini
  • Patent number: 4143280
    Abstract: A control system for a self-excited alternator which includes an auxiliary winding adapted to supply excitation to the alternator field winding incorporates a circuit for supplementing field excitation when the available energy from the auxiliary winding is less than the desired magnitude of field excitation. The self-exciting a-c current from the auxiliary winding is coupled through a phase-controlled rectifier circuit to the alternator field winding. A secondary excitation source such as a battery is coupled to the alternator field winding through a chopper circuit. A regulating circuit is responsive to a field current reference signal for controlling the conduction of the phase controlled rectifier circuit and the chopper circuit in a manner to regulate the alternator field excitation to the desired value.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: March 6, 1979
    Assignee: General Electric Company
    Inventors: Frederick J. Kuehn, Jr., Joseph A. Laukaitis, Stuart W. McElhenny