Reconfigurable converter

• US 9,917,530 B2
• Filed: 10/04/2016
• Issued: 03/13/2018
• Est. Priority Date: 10/06/2015
• Status: Active Grant

• Current Assignee: Cummins Power Generation IP, Inc. (Cummins Incorporated)
• Original Assignee: Cummins Power Generation IP, Inc. (Cummins Incorporated)
• Inventors: Dziuba, Robert, Stepancik, Filip, Leonarski, Jaroslaw, Pekar, Yefrem I.
• Primary Examiner(s): Ismail, Shawki S
• Assistant Examiner(s): IMTIAZ, ZOHEB S
• Application Number:
  US15/285,273
• Publication Number:
  US 20170099010A1
• Time in Patent Office: 525 Days
• CPC Class Codes: H02M 1/0009 Devices or circuits for detecting current in a converter
• CPC Class Codes: H02M 1/088 for the simultaneous control of series or parallel connected semiconductor devices
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02M 7/537 using semiconductor devices only, e.g. single switched pulse inverters
• CPC Class Codes: H02M 7/5387 in a bridge configuration
• CPC Class Codes: H02P 25/092 Converters specially adapted for controlling reluctance motors
• CPC Class Codes: H05K 7/1432 specially adapted for power drive units or power converters
• CPC Class Codes: H05K 7/14329 specially adapted for the configuration of power bus bars

Abstract

A reconfigurable converter includes a power circuit receives a direct current (DC) power signal and provides an alternating current (AC) output signal across at least three phases. The power circuit comprises a plurality of legs, each leg comprising an output node. A coupling device provides a first output configuration and a second output configuration for the plurality of legs. In the first output configuration, the coupling device comprises a coupling portion coupling at least two output nodes to provide a common output terminal. In the second output configuration, the coupling device comprises separate output terminals, each connected to one of the at least two output nodes.

Claims

1. A reconfigurable converter, comprising:

a first rail and a second rail that transmit a direct current (DC) power signal;

a plurality of legs connected in parallel between the first rail and the second rail, each of the plurality of legs including;

a first switch and a second switch connected in series between the first rail and the second rail; and

an output node between the first switch and the second switch; and

at least one coupling device providing a first output configuration and a second output configuration for at least two output nodes on the plurality of legs, wherein, in the first output configuration, the at least one coupling device comprises a coupling portion coupling the at least two output nodes to provide a common output terminal, and wherein, in the second output configuration, the at least one coupling device comprises separate output terminals, each connected to one of the at least two output nodes.

2. The reconfigurable converter of claim 1, wherein the plurality of legs comprise a first leg, a second leg, a third leg, a fourth leg, a fifth leg, a sixth leg, a seventh leg, and an eighth leg.

3. The reconfigurable converter of claim 2, wherein the at least one coupling device places the output nodes on the first leg, the second leg, the third leg, the fourth leg, the fifth leg, the sixth leg, the seventh leg, and the eighth leg in the second output configuration, and wherein the output terminals of each leg are configured for coupling to a four-phase switched reluctance machine.

4. The reconfigurable converter of claim 2, wherein the at least one coupling device places the output nodes on the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg in the second output configuration, and wherein the output terminals of the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg are each configured for coupling to a three-phase switched reluctance machine.

5. The reconfigurable converter of claim 2, wherein the at least one coupling device further places the output nodes on one or more legs in the second output configuration, and wherein the output terminals of each of the one or more legs are configured for coupling to a DC load.

6. The reconfigurable converter of claim 2, wherein the at least one coupling device places the output nodes on the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg in the second output configuration, and wherein the output terminals of the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg are each configured for coupling to one of a first three-phase output and a second three-phase output or a first two-phase output and a second two-phase output.

7. The reconfigurable converter of claim 6, wherein the first three-phase output and second three-phase output are each configured for coupling to one of a first three-phase motor and a second three-phase motor.

8. The reconfigurable converter of claim 2, wherein the at least one coupling device places the output nodes on the first leg and the second leg in the first output configuration, the output nodes on the third leg and the fourth leg in the first output configuration, and the output nodes on the fifth leg and the sixth leg in the first output configuration, and wherein the output terminals of the first leg and the second leg, the third leg and the fourth leg, and the fifth leg and the sixth leg are each configured for coupling to a three-phase motor.

9. The reconfigurable converter of claim 1, wherein the converter is coupled to one of a synchronous or variable speed genset.

10. A converter system, comprising:

a reconfigurable converter, including;

a first rail and a second rail that transmit a direct current (DC) power signal; and

a plurality of legs connected in parallel between the first rail and the second rail, each of the plurality of legs including;

a first switch and a second switch connected in series between the first rail and the second DC rail; and

an output node between the first switch and the second switch; and

bus bars providing a first output configuration and a second output configuration for at least two output nodes on the plurality of legs, wherein, in the first configuration, the bus bars comprise a first bus bar coupling the at least two output nodes to provide a common output terminal, and wherein, in the second output configuration, the bus bars comprise second bus bars, each connected to one of the at least two output nodes to provide separate output terminals.

11. The converter system of claim 10, further comprising a current sensor coupled to at least one of the bus bars.

12. The converter system of claim 10, wherein the first bus bar comprises a multi-tooth fork bar.

13. The converter system of claim 10, wherein the first bus bar comprises at least one of a T-shape bus bar or a U-shape bus bar, and wherein the second bus bars comprise straight bus bars.

14. The converter system of claim 10, where the multiple legs comprises a first leg, a second leg, a third leg, a fourth leg, a fifth leg, a sixth leg, a seventh leg, and an eighth leg.

15. The converter system of claim 14, wherein the second bus bars place the output nodes on the first leg, the second leg, the third leg, the fourth leg, the fifth leg, the sixth leg, the seventh leg, and the eighth leg in the second output configuration, and the output terminals of each leg are configured for coupling to a four-phase switched reluctance machine.

16. The converter system of claim 14, wherein the second bus bars place the output nodes the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg in the second output configuration, and wherein the output terminals of the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg are each configured for coupling to a three-phase switched reluctance machine.

17. The converter system of claim 14, wherein the second bus bar and the third bus bar place the output nodes on the seventh leg and the eighth leg in the second configuration, and wherein the output terminals of the seventh leg and the eighth leg are each configured for coupling to a DC load.

18. The converter system of claim 14, wherein the second bus bars place the output nodes on the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg in the second configuration, and wherein the output terminals of the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg are each configured for coupling to one of a first three-phase motor and a second three-phase motor.

19. The converter system of claim 14, wherein the first bus bars place the output nodes on the first leg and the second leg in the first output configuration, the output nodes on the third leg and the fourth leg in the first output configuration, and the output nodes on the fifth leg and the sixth leg in the first output configuration, and wherein the output terminals of the first leg and the second leg, the third leg and the fourth leg, and the fifth leg and the sixth leg are each configured for coupling to a three-phase motor.

20. A reconfigurable converter, comprising:

a power circuit receives a direct current (DC) power signal and provides an alternating current (AC) output signal across at least three phases, wherein the power circuit comprises a plurality of legs, and wherein each leg comprises an output node;

at least one coupling device providing a first output configuration and a second output configuration for at least two output nodes on the plurality of legs, wherein, in the first output configuration, the at least one coupling device comprises a coupling portion coupling the at least two output nodes to provide a common output terminal, and wherein, in the second output configuration, the at least one coupling device comprises separate output terminals, each connected to one of the at least two output nodes.

21. The reconfigurable converter of claim 20, wherein the plurality of legs comprise a first leg, a second leg, a third leg, a fourth leg, a fifth leg, a sixth leg, a seventh leg, and an eighth leg.

22. The reconfigurable converter of claim 21, wherein the at least one coupling device place the output nodes on the first leg, the second leg, the third leg, the fourth leg, the fifth leg, the sixth leg, the seventh leg, and the eighth leg in the second output configuration.

23. The reconfigurable converter of claim 20, wherein the at least one coupling device places the output nodes on the first leg and the second leg in the first output configuration, the output nodes on the third leg and the fourth leg in the first output configuration, the output nodes on the fifth leg and the sixth leg in the first output configuration, and the output nodes on the seventh leg and the eighth leg in the second configuration.