Drive control

• US 6,885,160 B2
• Filed: 04/22/2002
• Issued: 04/26/2005
• Est. Priority Date: 04/20/2001
• Status: Active Grant

• Current Assignee: Parkside IP LLC (IP Edge LLC)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Takeuchi, Kesatoshi
• Primary Examiner(s): Ro, Bentsu
• Application Number:
  US10/126,960
• Publication Number:
  US 20030020342A1
• Time in Patent Office: 1,100 Days
• Field of Search: 318/268, 318/269, 318/270, 318/271, 318/293, 318/375, 318/376, 318/139, 388/911
• US Class Current: 318/139
• CPC Class Codes: B60L 15/2036 Electric differentials, e.g. for supporting steering vehicles
• CPC Class Codes: B60L 2200/22 Microcars, e.g. golf cars
• CPC Class Codes: B60L 50/52 characterised by DC-motors
• CPC Class Codes: B62D 11/04 by means of separate power sources
• CPC Class Codes: B62D 11/183 Control systems therefor
• 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 10/72 Electric energy management in electromobility
• CPC Class Codes: Y10S 388/911 Phase locked loop

Abstract

The present invention is a drive control device for controlling an electric rotational actuator which moves the driver, including: a reference comparison signal generation circuit; a detection circuit for detecting the speed of the actuator and outputting this as a detection signal; a speed designation circuit of the actuator; a rotation control circuit of the actuator; and a phase comparison circuit for comparing the phase of the reference comparison signal and the phase of the detection signal and outputting the comparison result to the rotation control circuit; wherein the rotation control circuit controls the speed of the actuator to conform with the speed designation based on the phase comparison result.

Claims

1. A drive control device for controlling an electric rotational actuator which moves a driver, comprising:

a reference comparison signal generation circuit for generating a reference comparison signal;

a detection circuit for detecting the speed of said actuator and outputting this as a speed detection signal;

a speed designation circuit of said actuator for generating a designated speed value;

a speed comparison circuit for comparing the speed detection signal with the designated speed value and generating a designated speed signal;

a rotation control circuit of said actuator; and

a phase comparison circuit for comparing the phase of said reference comparison signal and the phase of said designated speed signal and outputting the comparison result to said rotation control circuit as a phase difference signal;

wherein said rotation control circuit controls the speed of said actuator to conform with said designated speed value based on said phase difference signal, and

wherein said reference comparison signal generation circuit divides the fundamental frequency and outputs a division ratio as the reference comparison signal, and the output of said rotation control circuit is altered in accordance with the phase comparison result.

2. A drive control device according to claim 1, wherein said reference comparison signal generation circuit, said detection circuit and said phase comparison circuit structure a PLL control block.

3. A drive control device according to claim 2, wherein said detection circuit divides the detected value from a rotation sensor of said actuator and outputs the divided value as said designated speed signal.

4. A drive control device according to claim 1 or claim 2, wherein said rotation control circuit, outputs the phase difference signal to said actuator.

5. A drive control device according to claim 1 or claim 2, wherein said rotation control circuit distinguishes whether said actuator is in an acceleration drive state or a braking drive state from said phase difference signal, and controls the operation of said actuator based on the result thereof.

6. A drive control device according to claim 5, wherein said rotation control circuit is structured of a drive control circuit for accelerating said actuator, and a braking control circuit for braking said actuator.

7. A drive control device according to claim 6, wherein a storage unit is provided which is capable of storing the braking power of said actuator as a load of said braking control circuit.

8. A drive control device according to claim 7, wherein said braking control circuit intermittently controls said storage unit and said actuator based on said phase difference signal.

9. A drive control device according to claim 6, wherein said drive control circuit intermittently controls the drive voltage supplied to said actuator based on the duty of said phase difference signal.

10. A drive control device according to claim 1, wherein said rotation control circuit comprises characteristic alteration means for altering the power characteristics of said actuator.

11. A drive control device according to claim 10, wherein said characteristic alteration means alters the duty of said actuator power.

12. A drive control device according to claim 11, wherein said characteristic alteration means alters the duty of said actuator power in accordance with the duty of said phase difference signal.

13. A drive control device according to claim 12, wherein said characteristic alteration means sets the threshold alteration ratio of said duty.

14. A drive control device according to claim 11, wherein said characteristic alteration means alters the duty of the power supply of said actuator.

15. A drive control device according to claim 10, wherein said characteristic alteration means alters the threshold value of said actuator power.

16. A drive control device according to claim 15, wherein said characteristic alteration means alters the threshold value of the power supply of said actuator.

17. A drive control device according to claim 10, wherein said characteristic alteration means alters the duty of the load power of said actuator.

18. A drive control device according to claim 10, wherein said characteristic alteration means alters the power threshold value of the load power of said actuator.

19. A drive control device according to claim 10, wherein said characteristic alteration means alters the duty of said actuator power and the threshold value thereof.

20. A drive control device according to claim 10, wherein said characteristic alteration means alters said power characteristics in accordance with the operational status of said actuator.

21. A drive control device according to claim 20, wherein said characteristic alteration means alters said power characteristics when said actuator is in the transition area of acceleration or braking.

22. A drive control device according to claim 10, wherein said characteristic alteration means alters said power characteristics in accordance with the operational status of said driver.

23. A driver comprising the drive control device according to claim 1, and an electric drive unit drive-controlled with this drive control device.

24. An electric traveling vehicle comprising:

the drive control device according to claim 1; and

an electric drive unit drive-controlled with this drive control device.

25. A drive control method for controlling an electric rotational actuator which moves a driver, comprising:

a reference comparison signal generation step generating a reference comparison signal;

a detection step for detecting the speed of said actuator and outputting this as a speed detection signal;

a speed designation step of said actuator setting a designated speed value;

a speed comparison step of said actuator comparing the speed detection signal with the designated speed value and generating a speed detection signal

a rotation control step of said actuator for controlling the speed of the actuator; and

a phase comparison step for comparing the phase of said reference comparison signal and the phase of said detection signal and outputting the phase comparison result to a rotation control circuit;

wherein said rotation control step, utilizing the rotation control circuit, controls the speed of said actuator to conform with said designated speed value based on said phase comparison result, and

wherein a reference comparison signal generation circuit divides the fundamental frequency and outputs a division ratio as the reference comparison signal, and the output of said rotation control circuit is altered in accordance with the phase comparison result.

26. A drive control device of a driver which includes a PLL control block and which supplies a designated speed signal and a reference comparison signal of the driver to a phase comparison unit and employs a phase difference signal from the phase comparison unit as a control signal of said driver;

wherein said designated speed signal is supplied to the PLL control block by a speed comparison circuit for comparing a speed detection signal with a designated speed value and generating the designated speed signal,

wherein a reference comparison signal generation circuit divides the fundamental frequency and outputs a division ratio as the reference comparison signal, and

wherein a rotation control circuit, altered in accordance with the phase difference signal, provides the control signal to said driver.

27. A drive control device for an electric powered vehicle including an electric motor controlled by a driver comprising:

a rotation control circuit for rotationally controlling the driver;

a speed detection circuit of said driver; and

a speed designation circuit of said driver;

wherein said rotation control circuit comprises;

a drive control circuit for outputting to said driver an acceleration control signal for accelerating said driver; and

a braking control circuit for outputting a braking control signal for brake-controlling said driver; and

wherein the acceleration of said driver to a designated speed and the deceleration of said driver to the designated speed are respectively performed by switching the output of said acceleration control signal and the output of said braking control signal.

28. A drive control device for an electric powered vehicle including an electric motor controlled by a driver comprising:

a rotation control circuit for rotationally controlling the driver;

a speed detection circuit of said driver; and

a speed designation circuit of said driver;

wherein said rotation control circuit comprises;

a drive control circuit for outputting to said driver an acceleration control signal for accelerating said driver; and

a braking control circuit for outputting a braking control signal for brake-controlling said driver; and

wherein the acceleration of said driver to the designated speed and stabilization at the designated speed and the deceleration of said driver to the designated speed and stabilization at the designated speed are respectively performed by switching the output of said acceleration control signal and the output of said braking control signal.