Multi-driving device and driving circuit thereof

• US 9,065,372 B2
• Filed: 05/31/2013
• Issued: 06/23/2015
• Est. Priority Date: 10/30/2012
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Tsai, Jian-Feng, Lin, Yong-Kai
• Primary Examiner(s): Ro, Bentsu
• Assistant Examiner(s): Mustafa, Iftekhar
• Application Number:
  US13/906,709
• Publication Number:
  US 20140117885A1
• Time in Patent Office: 753 Days
• Field of Search: 318/34, 318/51, 318/66, 318/632, 318/113, 318/400.27
• US Class Current: 1/1
• CPC Class Codes: H02M 1/008 Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
• CPC Class Codes: H02P 5/74 controlling two or more ac dynamo-electric motors H02P5/46, H02P5/60 take precedence

Abstract

A driving circuit comprises three switch groups, each comprising a first switch, a second switch, a third switch and a fourth switch. The first and the second switches are coupled in series. The third switch is serially coupled to the fourth switch and coupled between the first and the second switches. An i^th inductor of a first driving device is coupled between the third and the fourth switches, wherein i ranges between 1˜3. In high speed mode, the first and the third switches of one of the switch groups are turned on, the second and the fourth switches are turned off, the first and the third switches of another of the switch groups are turned off, the second switch is turned on, and the fourth switch is turned on or off to raise voltage of the a driving device.

Claims

1. A multi-driving device, comprising:

a first driving device comprising n inductors, wherein n is a positive integer equal to or larger than 3;

a second driving device; and

a driving circuit coupled to the first driving device and the second driving device and comprising n switch groups coupled in parallel, wherein each switch group comprises a first switch, a second switch, a third switch and a fourth switch, the first switch and the second switch are coupled in series, the third switch is serially coupled to the fourth switch and coupled between the first switch and the second switch, an i^th inductor of the first driving device is coupled between the third switch and the fourth switch, and i ranges between 1 and n;

wherein, in a low speed mode, each first switch and each second switch are turned on;

in a high speed mode, the first switch and the third switch of a first one of the n switch groups are turned on, the second switch and the fourth switch of the first one of the n switch groups are turned off, the first switch and the third switch of a second one of the n switch groups are turned off, the second switch of the second one of the n switch groups is turned on, and the fourth switch of the second one of the n switch groups is selectively turned on or off so as to raise the voltage of the second driving device.

2. The multi-driving device according to claim 1, wherein the fourth switch of the second one of the n switch groups is controlled by a pulse-width modulation (PWM) signal.

3. The multi-driving device according to claim 1, wherein the first switch, the second switch, the third switch and the fourth switch of each switch group are realized by relays, metal oxide semiconductor field effect transistors or insulated gate bipolar transistors.

4. The multi-driving device according to claim 1, wherein the first switches and the second switches which are turned off are realized by relays.

5. The multi-driving device according to claim 1, wherein the first driving device and the second driving device are realized by motors.

6. A driving circuit coupled to a first driving device and a second driving device, wherein the first driving device comprises n inductors, n is a positive integer equal to or larger than 3, and the driving circuit comprises:

n switch groups coupled in parallel, wherein each switch group comprises a first switch, a second switch, a third switch and a fourth switch, the first switch and the second switch are coupled in series, the third switch is serially coupled to the fourth switch and coupled between the first switch and the second switch, an i^th inductor of the first driving device is coupled between the third switch and the fourth switch, and, i ranges between 1 and n;

wherein, in a low speed mode, each first switch and each second switch are turned on;

in a high speed mode, the first switch and the third switch of a first one of the n switch groups are turned on, the second switch and the fourth switch of the first one of the n switch groups are turned off, the first switch and the third switch of a second one of the n switch groups are turned off, the second switch of the second one of the n switch groups is turned on, and the fourth switch of the second one of the n switch groups is selectively turned on or off so as to raise the voltage of the second driving device.

7. The driving circuit according to claim 6, wherein the fourth switch of the second one of the n switch groups is controlled by a PWM signal.

8. The driving circuit according to claim 6, wherein the first switch, the second switch, the third switch and the fourth switch of each switch group are realized by relays, metal oxide semiconductor field effect transistors or insulated gate bipolar transistors.

9. The driving circuit according to claim 6, wherein, the first switches and the second switches which are turned off are realized by relays.

10. The driving circuit according to claim 6, wherein, the first driving device and the second driving device are realized by motors.

11. A multi-driving device, comprising:

a first driving device comprising n inductors, wherein n is a positive integer equal to or larger than 3;

a second driving device; and

a driving circuit coupled to the first driving device and the second driving device and comprising n switch groups coupled in parallel, wherein each switch group comprises a first switch, a second switch, a third switch and a fourth switch, the first switch and the second switch are coupled in series, the third switch is serially coupled to the fourth switch and coupled between the first switch and the second switch, an i^th inductor of the first driving device is coupled between the third switch and the fourth switch, and i ranges between 1 and n;

wherein, in a low speed mode, the first switch and the second switch of a first one of the n switch groups are turned on, the first switch of a second one of the n switch groups is turned off, the second switch of the second one of the n switch groups is turned on, the first switch of a third one of the n switch groups is turned off, and the second switch of the third one of the n switch groups is turned on;

in a high speed mode, the first switch of the first one of the n switch groups is turned on, the second switch of the first one of the n switch groups is turned off, the third switch of the first one of the n switch groups is turned on, the fourth switch of the first one of the n switch groups is turned off, the first switch of the second one of the n switch groups is turned off, and the first switch of the third one of the n switch groups is turned off;

by controlling at least one of the fourth switch of the second one of the n switch groups and the fourth switch of the third one of the n switch groups to be turned on or off through a signal, so as to raise the voltage of the second driving device.

12. The multi-driving device according to claim 11, wherein a phase difference between a PWM signal for controlling the fourth switch of the second one of the n switch groups and a PWM signal for controlling the fourth switch of the third one of the n switch groups is 180 degrees.

13. The multi-driving device according to claim 11, wherein the fourth switch of the second one of the n switch groups is always turned off, at least one of the second switch and the third switch of the second one of the n switch groups is always turned off, the fourth switch of the third one of the n switch groups is controlled by a PWM, one of the second switch and the third switch of the third one of the n switch groups is turned off, and another of the second switch and the third switch of the third one of the n switch groups is turned on or off.

14. The multi-driving device according to claim 11, wherein the fourth switch of the third one of the n switch groups is always turned off, at least one of the second switch and the third switch of the third one of the n switch groups is always turned off, the fourth switch of the second one of the n switch groups is controlled by a PWM, one of the second switch and the third switch of the second one of the n switch groups is turned off, and another of the second switch and the third switch of the second one of the n switch groups is turned on or off.

15. The multi-driving device according to claim 11, wherein when the fourth switch of the second one of the n switch groups and the fourth switch of the third one of the n switch groups are controlled by PWMs, one of the second switch and the third switch of the second one of the n switch groups is turned off, another of the second switch and the third switch of the second one of the n switch groups is turned on or off, one of the second switch and the third switch of the third one of the n switch groups is turned off, and another of the second switch and the third switch of the third one of the n switch groups is turned on or off.

16. A driving circuit coupled to a first driving device and a second driving device, wherein the first driving device comprises n inductors, and n is a positive integer equal to or larger than 3 and the driving circuit comprises:

n switch groups coupled in parallel, wherein each switch group comprises a first switch, a second switch, a third switch and a fourth switch, the first switch and the second switch are coupled in series, the third switch is serially coupled to the fourth switch and coupled between the first switch and the second switch, an i^th inductor of the first driving device is coupled between the third switch and the fourth switch, and i ranges between 1 and n;

wherein, in a low speed mode, the first switch and the second switch of a first one of the n switch groups are turned on, the first switch of a second one of the n switch groups is turned off, the second switch of the second one of the n switch groups is turned on, the first switch of a third one of the n switch groups is turned off, and the second switch of the third one of the n switch groups is turned on;

in a high speed mode, the first switch of the first one of the n switch groups is turned on, the second switch of the first one of the n switch groups is turned off, the third switch of the first one of the n switch groups is turned on, the fourth switch of the first one of the n switch groups is turned off, the first switch of the second one of the n switch groups is turned off, and the first switch of the third one of the n switch groups is turned off;

by controlling at least one of the fourth switch of the second one of the n switch groups and the fourth switch of the third one of the n switch groups to be turned on or off through a signal, so as to raise the voltage of the second driving device.

17. The driving circuit according to claim 16, wherein a phase difference between a PWM signal for controlling the fourth switch of the second one of the n switch groups and a PWM signal for controlling the fourth switch of the third one of the n switch groups is 180 degrees.

18. The driving circuit according to claim 16, wherein the fourth switch of the second one of the n switch groups is always turned off, at least one of the second switch and the third switch of the second one of the n switch groups is always turned off, the fourth switch of the third one of the n switch groups is controlled by a PWM, one of the second switch and the third switch of the third one of the n switch groups is turned off, and another of the second switch and the third switch of the third one of the n switch groups is turned on or off.

19. The driving circuit according to claim 16, wherein the fourth switch of the third one of the n switch groups is always turned off, at least one of the second switch and the third switch of the third one of the n switch groups is always turned off, the fourth switch of the second one of the n switch groups is controlled by a PWM, one of the second switch and the third switch of the second one of the n switch groups is turned off, and another of the second switch and the third switch of the second one of the n switch groups is turned on or off.

20. The driving circuit according to claim 16, wherein when the fourth switch of the second one of the n switch groups and the fourth switch of the third one of the n switch groups are controlled by PWMs, one of the second switch and the third switch of the second one of the n switch groups is turned off, another of the second switch and the third switch of the second one of the n switch groups is turned on or off, one of the second switch and the third switch of the third one of the n switch groups is turned off, and another of the second switch and the third switch of the third one of the n switch groups is turned on or off.