Hot standby for lamp driver

• US 9,912,143 B1
• Filed: 02/27/2017
• Issued: 03/06/2018
• Est. Priority Date: 02/27/2017
• Status: Active Grant

• Current Assignee: Siemens Mobility, Inc. (Siemens AG)
• Original Assignee: Siemens Industry Incorporated (Siemens AG)
• Inventors: Hogan, Brian Joseph, Schmidt, Holger
• Primary Examiner(s): Tran, Anh
• Application Number:
  US15/442,766
• Time in Patent Office: 372 Days
• Field of Search: None
• CPC Class Codes: H02H 3/05 with means for increasing reliability, e.g. redundancy arrangements for logic circuits H03K19/003
• CPC Class Codes: H05B 45/52 in a parallel array of LEDs

Abstract

A lamp control system may include a plurality of parallel lamp modules. Each parallel lamp module may include control electronics configured to selectively couple a DC power source with a load to selectively drive the load. The lamp control system may include at least one control circuit configured to send a same control command to the control electronics of each of the parallel lamp modules at the same time so that each of the control electronics is configured to selectively drive the load identically. The lamp control system may include at least one relay configured to selectively couple one of the parallel lamp modules with the load and decouple each of the remaining parallel lamp modules from the load so that the control electronics of the one parallel lamp module selectively drive the load according to the control command.

Claims

1. A lamp control system comprising:

a plurality of parallel lamp modules, each parallel lamp module comprising control electronics configured to selectively couple a DC power source with a load to selectively drive the load;

a separate control circuit for each parallel lamp module, each control circuit being configurable to send a same control command to the control electronics of each of the parallel lamp modules at the same time so that each of the control electronics is configured to selectively drive the load identically; and

at least one relay configured to selectively couple one of the parallel lamp modules with the load and decouple each of the remaining parallel lamp modules from the load so that the control electronics of the one parallel lamp module selectively drive the load according to the control command.

2. The lamp control system of claim 1, wherein each control circuit is further configured to control the at least one relay to selectively couple the one parallel lamp module with the load and decouple each of the remaining parallel lamp modules from the load.

3. The lamp control system of claim 1, wherein each control circuit is further configured to:

detect a malfunction associated with the one parallel lamp module coupled with the load; and

in response to detecting the malfunction, decouple the one parallel lamp module from the load and couple one of the remaining parallel lamp modules with the load.

4. The lamp control system of claim 1, wherein the at least one relay comprises a separate relay for each parallel lamp module.

5. The lamp control system of claim 4, wherein each separate relay is an internal relay within each respective parallel lamp module.

8. The lamp control system of claim 1, wherein the at least one relay comprises at least one external relay coupled to each parallel lamp module and configured to selectively couple a single one of the parallel lamp modules with the load at a given time.

9. A lamp system comprising:

the lamp control system of claim 1;

the DC power source; and

the load.

10. The lamp system of claim 9, wherein the load comprises at least one lamp.

6. A lamp control system comprising:

a plurality of parallel lamp modules, each parallel lamp module comprising control electronics configured to selectively couple a DC power source with a load to selectively drive the load;

at least one control circuit configured to send a same control command to the control electronics of each of the parallel lamp modules at the same time so that each of the control electronics is configured to selectively drive the load identically; and

at least one relay configured to selectively couple one of the parallel lamp modules with the load and decouple each of the remaining parallel lamp modules from the load so that the control electronics of the one parallel lamp module selectively drive the load according to the control command; and

at least one standby logic circuit configured to control the at least one relay to selectively couple the one parallel lamp module with the load and decouple each of the remaining parallel lamp modules from the load.

7. The lamp control system of claim 6, wherein the at least one standby logic circuit is further configured to:

detect a malfunction associated with the one parallel lamp module coupled with the load; and

in response to detecting the malfunction, decouple the one parallel lamp module from the load and couple one of the remaining parallel lamp modules with the load.

11. A method for controlling a lamp, the method comprising:

sending a same control command to control electronics of each of a plurality of parallel lamp modules at the same time, by a separate control circuit for each parallel lamp module, so that each of the control electronics is configured to selectively drive a load identically, wherein each of the control electronics is configured to selectively couple a DC power source with the load to selectively drive the load; and

selectively coupling, by at least one relay, one of the parallel lamp modules with the load and decoupling each of the remaining parallel lamp modules from the load so that the control electronics of the one parallel lamp module selectively drive the load according to the control command.

12. The method of claim 11, further comprising controlling, by the separate control circuit for each parallel lamp module, the at least one relay to selectively couple the one parallel lamp module with the load and decouple each of the remaining parallel lamp modules from the load.

13. The method of claim 11, further comprising:

detecting, by the separate control circuit for each parallel lamp module, a malfunction associated with the one parallel lamp module coupled with the load; and

in response to detecting the malfunction, decoupling, by the separate control circuit for each parallel lamp module, the one parallel lamp module from the load and couple one of the remaining parallel lamp modules with the load.

14. The method of claim 11, wherein the at least one relay comprises a separate relay for each parallel lamp module.

15. The method of claim 11, further comprising controlling, by at least one standby logic circuit, the at least one relay to selectively couple the one parallel lamp module with the load and decouple each of the remaining parallel lamp modules from the load.

16. The method of claim 15, wherein each separate relay is an internal relay within each respective parallel lamp module.

17. The method of claim 11, wherein the at least one relay comprises at least one external relay coupled to each parallel lamp module and configured to selectively couple a single one of the parallel lamp modules with the load at a given time.

18. The method of claim 17, further comprising:

detecting, by the at least one standby logic circuit, a malfunction associated with the one parallel lamp module coupled with the load; and

in response to detecting the malfunction, decoupling, by the at least one standby logic circuit, the one parallel lamp module from the load and couple one of the remaining parallel lamp modules with the load.