Motor control center with power and data distribution bus

• US 20080137266A1
• Filed: 09/29/2006
• Published: 06/12/2008
• Est. Priority Date: 09/29/2006
• Status: Abandoned Application

• Current Assignee: Rockwell Automation Technologies Incorporated (Rockwell Automation, Inc.)
• Original Assignee: Rockwell Automation Technologies Incorporated (Rockwell Automation, Inc.)
• Inventors: Brandt, David D., Jensen, David L.
• Application Number:
  US11/540,380
• Publication Number:
  US 20080137266A1
• Time in Patent Office: Days
• US Class Current: 361/602
• CPC Class Codes: H02B 1/21 Bus-bar arrangements for rack-mounted devices with withdrawable units

Abstract

A motor control center (MCC) is provided. The MCC includes a power and data distribution bus comprising a plurality of conductive bars for distributing power and data signals within the MCC. In one embodiment, the plurality of conductive bars is configured to receive and distribute three-phase power from an external power source. The MCC may also include a device configured to receive power and data from the plurality of conductive bars. Devices and methods for distributing power and data to such devices within an MCC are also disclosed.

Claims

1. A motor control center (MCC) comprising:

an enclosure defining an interior volume;

a power and data distribution bus disposed within the enclosure, the power data and distribution bus comprising a plurality of conductive bus bars including first, second, and third conductive bus bars that are each configured to receive one respective phase of three-phase power from an external power source and distribute the respective phases within the MCC, the plurality of conductive bus bars configured to receive data signals and to transmit the data signals within the MCC; and

a device disposed within the interior volume, wherein the device is configured to receive at least one phase of three-phase power distributed by the first, second, and third conductive bus bars, and is configured to receive data signals from at least one conductive bus bar of the plurality of conductive bus bars.

2. The MCC of claim 1, comprising a fourth conductive bus bar of the plurality of conductive bus bars, wherein the fourth conductive bus bar is a neutral bus bar and the device is configured to receive the data signals from at least one of the first, second, or third conductive bus bars in cooperation with the fourth conductive bus bar.

3. The MCC of claim 2, wherein the device is configured to receive redundant data signals from more than one of the first, second, or third conductive bus bars in cooperation with the fourth conductive bus bar.

4. The MCC of claim 2, comprising a fifth conductive bus bar of the plurality of conductive bus bars, wherein the fifth conductive bus bar is an auxiliary power bus bar configured to distribute auxiliary power within the MCC and to the device.

5. The MCC of claim 4, wherein the device is configured to receive the data signals from the fifth conductive bus bar in cooperation with the fourth conductive bus bar.

6. The MCC of claim 5, wherein the device is configured to receive redundant data signals from the at least one of the first, second, or third conductive bus bars and the fifth conductive bus bar in cooperation with the fourth conductive bus bar.

7. The MCC of claim 1, wherein the device is configured to receive data signals in accordance with a common industrial protocol.

8. The MCC of claim 7, wherein the device is configured to receive data signals in accordance with a safety protocol in addition to the common industrial protocol.

9. The MCC of claim 8, wherein the device is configured to control output power delivery to a load in conformance with the safety protocol.

10. The MCC of claim 8, wherein the safety protocol includes a lockout/tagout protocol.

11. The MCC of claim 1, wherein the device is configured to detect voltage present on one or more of the conductive bus bars and/or a load power bus, and to indicate whether such voltage is present.

12. The MCC of claim 1, wherein the MCC does not include a discrete communication network configured to operately independently from power distribution to components within the MCC.

13. The MCC of claim 1, wherein the device is configured to receive single-ended data signals from one of the first, second, or third conductive bus bars.

14. The MCC of claim 13, wherein the device is configured to receive the single-ended data signals from only one of the first, second, or third conductive bus bars.

15. The MCC of claim 1, comprising an auxiliary control power conductive bar, wherein the device is configured to receive data signals from the auxiliary control power conductive bus bar.

16. A device configured for installation in a motor control center (MCC), the device comprising:

a plurality of electronic components configured to receive at least one phase of three-phase power from a common source power bus comprising a plurality of conductive power bus bars; and

a communication module coupled to the plurality of electronic components, wherein the communication module is configured to receive data signals from a first conductive power bus bar of the plurality of conductive power bus bars.

17. The device of claim 16, wherein the communication module is configured to receive data signals from the first conductive power bus bar in cooperation with a neutral bus bar.

18. The device of claim 16, wherein the communication module is configured to receive the data signals and one phase of the three-phase power from the first conductive power bus bar.

19. The device of claim 16, wherein the communication module is configured to receive the data signals and derive an auxiliary power signal from the first conductive power bus bar, the auxiliary power signal being independent of the three-phase power.

20. The device of claim 16, wherein the communication module is configured to receive redundant data signals over the first conductive power bus bar and a second conductive power bus bar.

21. The device of claim 16, wherein the device comprises a motor controller.

22. The device of claim 21, wherein the communication module is configured to receive data signals in accordance with a safety protocol and to control power to a motor in conformance with the safety protocol.

23. The device of claim 22, wherein the plurality of components include override circuitry configured to enable the communication module to control the power to the motor.

24. A method for distributing power and data to a device within a motor control center (MCC) having a plurality of power bus bars, the method comprising:

applying three-phase power to a common source power bus of the MCC, the common source power bus comprising first, second, and third power bus bars of the plurality of power bus bars such that each of the first, second, and third power bus bars conducts one phase of the three-phase power;

coupling the device to and receiving power from at least one of the first, second, and third power bus bars; and

transmitting data signals to and/or receiving data signals from the device via at least one power bus bar of the plurality of power bus bars.

25. The method of claim 24, wherein the at least one power bus bar comprises at least one of the first, second, or third power bus bars.

26. The method of claim 24, wherein the at least one power bus bar comprises a fourth power bus bar that conducts auxiliary power to the device.

27. The method of claim 26, comprising coupling the device to each of the first, second, and third power bus bars.

28. The method of claim 27, comprising interrupting power to the device from the first, second, and third power bus bars while maintaining electrical communication between the fourth power bus bar and a neutral bus bar to facilitate concurrent servicing of and communication with the device.

29. The method of claim 26, comprising transmitting redundant data signals over multiple power bus bars of the plurality of power bus bars.

30. The method of claim 26, wherein transmitting data signals is performed in accordance with a safety protocol.