Controller for motor to be mounted on vehicle and electric power steering device and electric brake device using thereof

• US 20060066270A1
• Filed: 09/22/2005
• Published: 03/30/2006
• Est. Priority Date: 09/22/2004
• Status: Abandoned Application

• Current Assignee: NSK Limited
• Original Assignee: NSK Limited
• Inventors: Endo, Shigeru, Kumagai, Shin, Horikoshi, Atsushi, Nagai, Kazunobu, Kuroda, Masahiro
• Application Number:
  US11/231,904
• Publication Number:
  US 20060066270A1
• Time in Patent Office: Days
• US Class Current: 318/139
• CPC Class Codes: B60T 13/741 acting on an ultimate actuator
• CPC Class Codes: B62D 5/046 Controlling the motor

Abstract

A controller for a motor to be mounted on a vehicle includes a boosting circuit 2 for raising the voltage of a battery that is disposed near the battery 1, a motor driving circuit 4 disposed near the motor 3 to be mounted on the vehicle for controlling the motor 3 to be mounted on the vehicle to be driven in accordance with boosted voltage outputted from the boosting circuit and a communication unit 5 disposed between the boosting circuit 2 and the motor driving circuit 4.

Claims

1. A controller for a motor to be mounted on a vehicle comprising:

a boosting unit for raising the voltage of a battery that is disposed near the battery;

a motor driving unit disposed near the motor to be mounted on the vehicle for controlling the motor to be mounted on the vehicle to be driven in accordance with the boosted voltage outputted from the boosting unit; and

a communication unit disposed between the boosting unit and the motor driving unit.

2. The controller for a motor to be mounted on a vehicle according to claim 1, wherein

the motor driving unit includes:

a motor rotating state detecting unit for detecting the rotating state of the motor to be mounted on a vehicle;

a boosted voltage control command determining unit for determining a boosted voltage control command to the boosting unit on the basis of the rotating state of the motor detected by the motor rotating state detecting unit, and

a data transmitting unit for transmitting the boosted voltage control command determined by the boosted voltage control command determining unit to the boosting unit through the communication unit.

3. The controller for a motor to be mounted on a vehicle according to claim 2, wherein

the motor rotating state detecting unit includes:

a rotating speed detecting unit for detecting the rotating speed of the motor to be mounted on a vehicle.

4. The controller for a motor to be mounted on a vehicle according to claim 2, wherein

the motor rotating state detecting unit includes:

a rotating acceleration detecting unit for detecting the rotating acceleration of the motor to be mounted on a vehicle.

5. The controller for a motor to be mounted on a vehicle according to claim 2, wherein

the boosting unit includes:

a boosted voltage control unit for controlling a boosted output voltage in accordance with the boosted voltage control command transmitted from the data transmitting unit of the motor driving unit.

6. The controller for a motor to be mounted on a vehicle according to claim 1, wherein

the boosting unit include:

a boosted output voltage detecting unit for detecting the boosted output voltage, and

a data transmitting unit for transmitting the boosted output voltage detected by the boosted output voltage detecting unit to the motor driving unit through the communication unit.

7. The controller for a motor to be mounted on a vehicle according to claim 6, wherein

the motor driving unit includes:

an applied voltage detecting unit for detecting applied voltage inputted from the boosting unit, and

a current abnormality detecting unit for detecting the abnormality of the current of the motor driving unit on the basis of the boosted output voltage transmitted from the boosting unit and the applied voltage detected by the applied voltage detecting unit.

8. The controller for a motor to be mounted on a vehicle according to claim 6, wherein

the motor driving unit includes:

an estimated voltage calculating unit for calculating an estimated boosted output voltage of the boosting unit in accordance with the boosted voltage control command determined by the boosted voltage control command determining unit, and

a boosted voltage abnormality detecting unit for detecting the abnormality of the boosting unit on the basis of the estimated boosted output voltage calculated by the estimated voltage calculating unit and the boosted output voltage transmitted from the boosting unit.

9. The controller for a motor to be mounted on a vehicle according to claim 1, wherein

the communication unit performs a serial data communication.

10. The controller for a motor to be mounted on a vehicle according to claim 1, wherein

the communication unit performs an optical data communication.

11. The electric power steering device on which the controller for a motor to be mounted on a vehicle according to claim 1 is mounted.

12. The electric brake device on which the controller for a motor to be mounted on a vehicle according to claim 1 is mounted.

13. A controller for a motor to be mounted on a vehicle comprising:

a boosting circuit part disposed in the vicinity of a battery mounted on the vehicle to raise the output voltage of the battery; and

a driving control part disposed in the vicinity of a motor to which a driving power is supplied by the battery to PWM control the drive of the motor in accordance with the voltage boosted by the boosting circuit part.

14. The controller for a motor to be mounted on a vehicle according to claim 13, further comprising:

a communication unit for performing a communication between the boosting circuit part and the driving control part.

15. The controller for a motor to be mounted on a vehicle according to claim 14, wherein

the driving control part transmits a boosted voltage command to the boosting circuit part through the communication unit.

16. The controller for a motor to be mounted on a vehicle according to claim 14, wherein

the boosting circuit part transmits the detected result of a battery voltage to the driving control part through the communication unit.

17. The controller for a motor to be mounted on a vehicle according to claim 14, wherein

the boosting circuit part transmits the detected result of a battery current to the driving control part through the communication unit.

18. The controller for a motor to be mounted on a vehicle according to claim 14, wherein

the driving control part includes a deciding unit for deciding an abnormality of the boosting circuit part in accordance with the compared result of the boost voltage command with the detected boosted voltage.

19. The controller for a motor to be mounted on a vehicle according to claim 17, wherein

the driving control part controls a quantity of current supplied to the winding of the motor in accordance with the detected result of the battery current transmitted from the boosting circuit part.

20. The controller for a motor to be mounted on a vehicle according to claim 13, wherein

the driving control part controls a three-phase motor to be driven.

21. The controller for a motor to be mounted on a vehicle according to claim 20, wherein

the three-phase motor is a brush-less motor.

22. The controller for a motor to be mounted on a vehicle according to claim 20, wherein

the driving control part detects the rotating position of a rotor in the three-phase motor by using a resolver disposed in the three-phase motor and performs a PWM control in accordance with the rotating position.

23. The controller for a motor to be mounted on a vehicle according to claim 13, wherein

the driving control part includes:

power circuit for generating a controlling power source from the battery voltage.

24. The power steering device including the controller for a motor to be mounted on a vehicle according to claim 13, wherein

a steering drive is assisted by the output torque of the motor.