UPS with multiple independent static switches

• US 9,806,560 B2
• Filed: 10/04/2012
• Issued: 10/31/2017
• Est. Priority Date: 10/04/2012
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: Navarro, George Arthur
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): WILLOUGHBY, TERRENCE RONIQUE
• Application Number:
  US13/644,936
• Publication Number:
  US 20140097680A1
• Time in Patent Office: 1,853 Days
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

An uninterruptible power supply (UPS) includes a frame, at least one AC input supported by the frame and configured to be coupled to at least one external power source and at least one AC output supported by the frame and configured to be coupled to at least one external load. The UPS also includes a power conversion circuit supported by the frame and having an output coupled to the at least one AC output, the power conversion circuit configured to selectively provide power from first and second power sources. The UPS further includes first and second static switches supported by the frame and configured to couple and decouple the at least one AC input to and from the at least one AC output and a control circuit supported by the frame and configured to cooperatively control the power conversion circuit and the first and second static switches.

Claims

1. An uninterruptible power supply (UPS) comprising:

a frame;

first, second and third AC inputs supported by the frame and separately and independently coupleable to different power sources;

first, second and third AC outputs supported by the frame and separately coupleable to different loads;

a power conversion circuit supported by the frame and having an output coupled to the first AC output, the power conversion circuit coupled to the first AC input and configured to provide power to the first AC output;

a first static switch supported by the frame and configured to selectively couple the second AC input to the second AC output;

a second static switch supported by the frame and configured to selectively couple the third AC input to the third AC output; and

a control circuit supported by the frame and configured to cooperatively control the power conversion circuit and the first and second static switches.

2. The UPS of claim 1, wherein the power conversion circuit comprises:

a rectifier having an input coupled to the first AC input;

a DC link coupled to an output of the rectifier; and

an inverter having an input coupled to the DC link and an output coupled to the first AC output.

3. The UPS of claim 2, wherein the control circuit is configured to concurrently close the first static switch and open the second static switch to support an increased efficiency mode of operation in which the power conversion circuit is bypassed.

4. The UPS of claim 1, wherein the frame comprises an enclosure containing the power conversion circuit and the first and second static switches.

5. A system comprising:

a plurality of UPSs, each of the UPSs comprising;

a frame;

first, second and third AC inputs supported by the frame and separately and independently coupleable to different power sources;

first, second and third AC outputs supported by the frame and separately coupleable to different loads;

a power conversion circuit supported by the frame and having an output coupled to the first AC output;

a first static switch supported by the frame and configured to selectively couple the second AC input to the second AC output;

a second static switch supported by the frame and configured to selectively couple the third AC input to the third AC output; and

a control circuit supported by the frame and configured to cooperatively control the power conversion circuit and the first and second static switches; and

first and second AC power sources coupled to respective ones of the first and second static switches of the plurality of UPSs.

6. The system of claim 5, wherein the plurality of UPSs comprises a plurality of first UPSs and wherein the second AC power source comprises at least one second UPS.

7. The system of claim 5, wherein respective ones of the plurality of UPSs are coupled to respective loads.

8. The system of claim 5, wherein the power conversion circuit comprises:

a rectifier having an input coupled to the first AC input;

a DC link coupled to an output of the rectifier; and

an inverter having an input coupled to the DC link and an output coupled to the first AC output.

9. The system of claim 8, wherein the control circuit is configured to concurrently close the first static switch and open the second static switch to support an increased efficiency mode of operation in which the inverter and the rectifier are bypassed.

10. The system of claim 5, wherein the frame comprises an enclosure containing the power conversion circuit and the first and second static switches.

11. A system comprising:

a UPS comprising;

a frame;

first, second and third AC inputs supported by the frame and separately and independently coupleable to different power sources;

first, second and third AC outputs supported by the frame and separately coupleable to different loads;

a power conversion circuit supported by the frame and having an output coupled to the first AC output;

a first static switch supported by the frame and configured to selectively couple the second AC input to the second AC output;

a second static switch supported by the frame and configured to selectively couple the third AC input to the third AC output; and

a control circuit supported by the frame and configured to cooperatively control the power conversion circuit and the first and second static switches; and

first and second loads coupled to respective ones of the first and second static switches.

12. The system of claim 11:

wherein the first static switch is coupled between an AC power source and the first load; and

wherein the second static switch is coupled between the first static switch and the second load.

13. The system of claim 11:

wherein the first static switch is coupled between an AC power source and the first load; and

wherein the second static switch is coupled between the AC power source and the second load.

14. The system of claim 11, wherein the power conversion circuit comprises:

a rectifier having an input coupled to the first AC input;

a DC link coupled to an output of the rectifier; and

an inverter having an input coupled to the DC link and an output coupled to the first AC output.

15. The system of claim 11, wherein the frame comprises an enclosure containing the power conversion circuit and the first and second static switches.