CHARGE CONTROL DEVICE AND VEHICLE USING THE SAME

• US 20090146612A1
• Filed: 06/12/2007
• Published: 06/11/2009
• Est. Priority Date: 06/16/2006
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Oyobe, Hichirosai, Ishikawa, Tetsuhiro, Nakamura, Makoto, Minezawa, Yukihiro
• Granted Patent: US 8,143,861 B2
• Time in Patent Office: Days
• US Class Current: 320/138
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 15/007 Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2220/54 Windings for different functions
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/24 Using the vehicle's propulsion converter for charging
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y10S 903/906 : Motor or generator

Abstract

At the time of charging a power storage device from a commercial power supply, electric power from the commercial power supply is applied to a neutral point of each of first and second motor generators. A rotation preventing control unit (222) determines one phase to be subjected to switching control in the first inverter, based on a rotation angle (θ1) of the first motor generator. Further, rotation preventing control unit (222) calculates torque generated in the first motor generator, generates a torque control value for canceling out the torque, and outputs the value to a phase voltage operating unit (214) for motor control.

Claims

1. A charge control device for charging a power storage device mounted on a vehicle from a power supply outside the vehicle, comprising:

an AC rotating electric machine including a star-connected first poly-phase winding as a stator winding;

an inverter connected to said poly-phase winding and performing power conversion between said AC rotating electric machine and said power storage device;

a connecting device configured to allow connection of said power supply to a neutral point of said poly-phase winding;

an inverter control unit controlling any one phase of said inverter such that electric power from said power supply applied to said neutral point by said connecting device is converted to charge said power storage device; and

a rotation preventing unit configured to prevent rotation of said AC rotating electric machine at the time of charging said power storage device from said power supply.

2. The charge control device according to claim 1, wherein

said rotation preventing unit includes a braking device fixing a rotor of said AC rotating electric machine to be in a non-rotating state.

11. A vehicle provided with a charge control device according to claim 1.

3. A charge control device for charging a power storage device mounted on a vehicle from a power supply outside the vehicle, comprising:

a first AC rotating electric machine including a star-connected first poly-phase winding as a stator winding;

a first inverter connected to said first poly-phase winding and performing power conversion between said first AC rotating electric machine and said power storage device;

a connecting device configured to allow connection of said power supply to a first neutral point of said first poly-phase winding;

an inverter control unit controlling any one phase of said first inverter such that electric power from said power supply applied to said first neutral point by said connecting device is converted to charge said power storage device;

an internal combustion engine;

a gear mechanism connected to an output shaft of said internal combustion engine, a rotation shaft of said first AC rotating electric machine and a driving shaft of the vehicle, and transmitting power among said output shaft, said rotation shaft and said driving shaft; and

a rotation preventing unit configured to prevent rotation of said driving shaft by torque generated by said first AC rotating electric machine, when said power storage device is charged from said power supply.

4. The charge control device according to claim 3, further comprising:

a second AC rotating electric machine having a rotation shaft mechanically coupled to said driving shaft of the vehicle;

a second inverter driving said second AC rotating electric machine;

a rotation angle detecting device detecting a rotation angle of said first AC rotating electric machine; and

a current detecting device detecting a current flowing through said first AC rotating electric machine;

wherein

said rotation preventing unit calculates an output torque of said first AC rotating electric machine based on values detected by each of said rotation angle detecting device and said current detecting device, and controls said second inverter such that said second AC rotating electric machine outputs a torque canceling out the calculated output torque.

5. The charge control device according to claim 4, wherein

said second AC rotating electric machine includes a star-connected second poly-phase winding as a stator winding;

said connecting device is configured to allow connection of said power supply to said first neutral point and to a second neutral point of said second poly-phase winding; and

said inverter control unit further controls zero-phase voltage of said second inverter such that electric power from said power supply applied to said first and second neutral points by said connecting device is converted to charge said power storage device.

6. The charge control device according to claim 3, wherein

said rotation preventing unit reduces rotation resistance of the output shaft of said internal combustion engine.

7. The charge control device according to claim 6, wherein

said rotation preventing unit sets at least one of an intake valve and an exhaust valve of said internal combustion engine to an open state.

8. The charge control device according to claim 6, further comprising:

an engaging element provided between the output shaft of said internal combustion engine and said gear mechanism;

wherein

said rotation preventing unit sets said engaging element to a disengaged state.

9. A charge control device for charging a power storage device mounted on a vehicle from a power supply outside the vehicle, comprising:

a first AC rotating electric machine including a star-connected first poly-phase winding as a stator winding;

a first inverter connected to said first poly-phase winding and performing power conversion between said first AC rotating electric machine and said power storage device;

a connecting device configured to allow connection of said power supply to a first neutral point of said first poly-phase winding;

a rotation angle detecting device detecting a rotation angle of said first AC rotating electric machine; and

an inverter control unit controlling said first inverter such that electric power from said power supply applied to said first neutral point by said connecting device is converted to charge said power storage device, while current component in q-axis direction of said first AC rotating electric machine is prevented.

10. The charge control device according to claim 9, further comprising:

a second AC rotating electric machine including a star-connected second poly-phase winding as a stator winding; and

a second inverter connected to said second poly-phase winding and performing power conversion between said second AC rotating electric machine and said power storage device;

wherein

said connecting device is configured to allow connection of said power supply to said first neutral point and to a second neutral point of said second poly-phase winding; and

said inverter control unit further controls zero-phase voltage of said second inverter such that electric power from said power supply applied to said first and second neutral points by said connecting device is converted to charge said power storage device.