Open Delta Motor Drive With Integrated Recharge

• US 20110316461A1
• Filed: 06/29/2010
• Published: 12/29/2011
• Est. Priority Date: 06/29/2010
• Status: Active Grant

• Current Assignee: AC Propulsion, Inc.
• Original Assignee: AC Propulsion, Inc.
• Inventors: Rippel, Wally E.
• Granted Patent: US 8,415,904 B2
• Time in Patent Office: Days
• US Class Current: 318/400.29
• CPC Class Codes: H02P 6/14 Electronic commutators

Abstract

An integrated motor drive and battery recharge apparatus includes a battery, an electric motor having N separate motor windings each having a first and a second leg, a contactor having a plurality M of poles, each pole having a first side and a second side, the inverter having 2N switching poles and a capacitor each coupled in parallel with the battery, and PWM control circuitry configured to control the state of each switching pole. Each leg of each motor winding is coupled to a phase node of a corresponding inverter switching pole, at least two of the motor winding legs (or taps thereof) are coupled to the corresponding first sides of the contactor poles, a power source/sink is coupled to the corresponding second sides of the contactor poles, and in one aspect a capacitor is coupled between each pair of contactor poles.

Claims

1. An integrated motor drive and battery recharge apparatus, comprising:

a battery;

an electric motor having N separate motor windings each having a first and a second leg;

a contactor having a plurality M of poles, each pole having a first side and a second side;

a 2N pole bridge inverter, the inverter having 2N switching poles and a capacitor each coupled in parallel with the battery;

PWM control circuitry configured to control the state of each switching pole,

wherein each leg of each motor winding is coupled to a phase node of a corresponding inverter switching pole, at least two of the motor winding legs are coupled to the corresponding first sides of the contactor poles, a power source/sink is coupled to the corresponding second sides of the contactor poles, and a capacitor is coupled between each pair of contactor poles.

2. The apparatus of claim 1, further comprising:

an EMI filter/recharge port coupled to the second sides of the contactor poles.

3. The apparatus of claim 1, wherein M=N.

4. The apparatus of claim 1, wherein M<

N.

5. The apparatus of claim 2, wherein the EMI filter/recharge port is configured to be coupled to a DC power source/sink.

6. The apparatus of claim 2, wherein the EMI filter/recharge port is configured to be coupled to an AC power source/sink.

7. The apparatus of claim 1, wherein an inductor is coupled between each second side of a contactor pole and the power source/sink.

8. The apparatus of claim 7, further comprising:

an EMI filter/recharge port coupled to the second sides of the contactor poles.

9. The apparatus of claim 7, wherein M=N.

10. The apparatus of claim 7, wherein M<

N.

11. The apparatus of claim 8, wherein the EMI filter/recharge port is configured to be coupled to a DC power source/sink.

12. The apparatus of claim 8, wherein the EMI filter/recharge port is configured to be coupled to an AC power source/sink.

13. An integrated motor drive and battery recharge apparatus, comprising:

a battery;

an electric motor having N separate motor windings each having a first and a second leg;

a contactor having a plurality M of poles, each pole having a first side and a second side;

a 2N pole bridge inverter, the inverter having 2N switching poles and a capacitor each coupled in parallel with the battery;

PWM control circuitry configured to control the state of each switching pole,

wherein each leg of each motor winding is coupled to a phase node of a corresponding inverter switching pole, at least two of the motor windings have taps which are coupled to the corresponding first sides of the contactor poles, and a power source/sink is coupled to the corresponding second sides of the contactor poles.

14. The apparatus of claim 13, further comprising:

capacitors coupled between each pair of contactor poles.

15. The apparatus of claim 13, further comprising:

an EMI filter/recharge port coupled to the second sides of the contactor poles.

16. The apparatus of claim 13, wherein M=N.

17. The apparatus of claim 13, wherein M<

N.

18. The apparatus of claim 15, wherein the EMI filter/recharge port is configured to be coupled to a DC power source/sink.

19. The apparatus of claim 15, wherein the EMI filter/recharge port is configured to be coupled to an AC power source/sink.

20. The apparatus of claim 14, wherein an inductor is coupled between each second side of a contactor pole and the power source/sink.

21. The apparatus of claim 20, further comprising:

an EMI filter/recharge port coupled to the second sides of the contactor poles.

22. The apparatus of claim 20, wherein M=N.

23. The apparatus of claim 20, wherein M<

N.

24. The apparatus of claim 21, wherein the EMI filter/recharge port is configured to be coupled to a DC power source/sink.

25. The apparatus of claim 21 wherein the EMI filter/recharge port is configured to be coupled to an AC power source/sink.

26. The apparatus of claim 13 wherein the taps are center taps.