Apparatus, system, and method for providing power redundancy to a device designed to draw power from a single external power adapter

• US 9,812,897 B2
• Filed: 07/05/2013
• Issued: 11/07/2017
• Est. Priority Date: 05/05/2013
• Status: Active Grant

• Current Assignee: Juniper Networks Incorporated
• Original Assignee: Juniper Networks Incorporated
• Inventors: Rodrigues, Paulo
• Primary Examiner(s): Fleming, Fritz M
• Assistant Examiner(s): DHILLON, JAGDEEP S
• Application Number:
  US13/936,056
• Publication Number:
  US 20140328094A1
• Time in Patent Office: 1,586 Days
• Field of Search: 307 64, 307107, 307128, 307 39, 307 43, 307 82, 363 39, 363 43
• CPC Class Codes: H02J 1/10 Parallel operation of dc sources
• CPC Class Codes: H02J 4/00 Circuit arrangements for mains or distribution networks not specified as ac or dc
• CPC Class Codes: H02J 9/06 with automatic change-over , e.g. UPS systems
• CPC Class Codes: H02M 1/10 Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc

Abstract

An apparatus may include a plurality of power inputs configured to receive direct current from a plurality of external power adapters that convert alternating current to direct current. The plurality of external power adapters may include a primary external power adapter and at least one backup external power adapter. The apparatus may also include a power output configured to provide direct current to a device. In addition, the apparatus may include a switching mechanism that, when the primary external power adapter is operational, supplies direct current from the primary external power adapter to the power output and, when the primary external power adapter fails, supplies direct current from the backup external power adapter to the power output. Various additional apparatuses, systems, and methods are also disclosed.

Claims

1. An apparatus comprising:

a single physical enclosure that houses;

a plurality of power inputs configured to receive direct current from a plurality of external power adapters, which are external to the single physical enclosure, that convert alternating current to direct current, the plurality of external power adapters comprising a primary external power adapter and at least one backup external power adapter;

a single power output configured to provide direct current to a device that is external to the single physical enclosure and configured to draw direct current from a single external power adapter;

a switching mechanism comprising a portion of memory and a communication infrastructure that both monitor power provided via the plurality of external power adapters and continuously supply power to the device by;

detecting when the primary external power adapter is operational by detecting when direct current is received at a power input connected to the primary external power adapter;

detecting when the primary external power adapter fails by detecting when no direct current is received at the power input connected to the primary external power adapter;

supplying direct current from the primary external power adapter to the power output when the primary external power adapter is operational and supplying direct current from the backup external power adapter to the power output when the primary external power adapter fails.

2. The apparatus of claim 1, wherein detecting when the primary external power adapter fails further comprises detecting at least one of:

a malfunction of the primary external power adapter;

a malfunction of a power source from which the primary external power adapter draws alternating current.

3. The apparatus of claim 1, wherein the primary external power adapter is housed in a physical enclosure that is external to, and separate from, a physical enclosure that houses the backup external power adapter.

4. The apparatus of claim 1, wherein the primary external power adapter and the backup external power adapter draw alternating current from independent power sources.

5. The apparatus of claim 1, wherein both the primary external power adapter and the backup external power adapter draw alternating current from a single power source.

6. The apparatus of claim 1, wherein the switching mechanism uses a feedback loop to monitor the power provided via the plurality of external power adapters.

7. The apparatus of claim 1, wherein the switching mechanism prevents the backup external power adapter from supplying direct current to the power output when the primary external power adapter is operational.

8. The apparatus of claim 1, wherein:

the backup external power adapter comprises a plurality of backup external power adapters;

when the primary external power adapter fails, the switching mechanism supplies direct current from at least one of the plurality of backup external power adapters to the power output.

9. The apparatus of claim 8, wherein, when the primary external power adapter fails, the switching mechanism supplies direct current from a single backup external power adapter within the plurality of backup external power adapters to the power output.

10. A system comprising:

a plurality of external power adapters that convert alternating current to direct current, the plurality of external power adapters comprising a primary external power adapter and at least one backup external power adapter;

an apparatus comprising;

a single physical enclosure, which is external to the plurality of external power adapters, that houses;

a plurality of power inputs that are electrically coupled to, and draw direct current from, the plurality of external power adapters;

a single power output electrically coupled to a device that is external to the single physical enclosure and configured to draw direct current from a single external power adapter;

a switching mechanism comprising a portion of memory and a communication infrastructure that both monitor power provided via the plurality of external power adapters and continuously supply power to the device by;

detecting when the primary external power adapter is operational by detecting when direct current is received at a power input electrically coupled to the primary external power adapter;

detecting when the primary external power adapter fails by detecting when no direct current is received at the power input electrically coupled to the primary external power adapter;

supplying direct current from the primary external power adapter to the power output when the primary external power adapter is operational and supplying direct current from the backup external power adapter to the power output when the primary external power adapter fails.

11. The system of claim 10, wherein detecting when the primary external power adapter fails further comprises detecting at least one of:

a malfunction of the primary external power adapter;

a malfunction of a power source from which the primary external power adapter draws alternating current.

12. The system of claim 10, wherein the primary external power adapter is housed in a physical enclosure that is external to, and separate from, a physical enclosure that houses the backup external power adapter.

13. The system of claim 10, wherein the primary external power adapter and the backup external power adapter draw alternating current from independent power sources.

14. The system of claim 10, wherein both the primary external power adapter and the backup external power adapter draw alternating current from a single power source.

15. The system of claim 10, wherein the switching mechanism uses a feedback loop to monitor the power provided via the plurality of external power adapters.

16. The system of claim 10, wherein the switching mechanism prevents the backup external power adapter from supplying direct current to the power output when the primary external power adapter is operational.

17. The system of claim 10, wherein:

the backup external power adapter comprises a plurality of backup external power adapters;

when the primary external power adapter fails, the switching mechanism supplies direct current from at least one of the plurality of backup external power adapters to the power output.

18. The system of claim 17, wherein, when the primary external power adapter fails, the switching mechanism supplies direct current from a single backup external power adapter within the plurality of backup external power adapters to the power output.

19. A method comprising:

monitoring, at a plurality of power inputs housed within a single physical enclosure, direct current provided to the plurality of inputs via a plurality of power adapters that are external to the single physical enclosure and that convert alternating current to direct current, the plurality of external power adapters comprising a primary external power adapter and at least one backup external power adapter;

continuously providing power to a device that is external to the single physical enclosure and that draws direct current from a single external power adapter by;

detecting when the primary external power adapter is operational by detecting when direct current is provided by the primary external power adapter;

detecting when the primary external power adapter fails by detecting when no direct current is provided by the primary external power adapter;

supplying direct current from the primary external power adapter to a power output that is housed within the single physical enclosure and that is electrically coupled to the external device when the primary external power adapter is operational and supplying direct current from the backup external power adapter to the power output when the primary external power adapter fails.

20. The method of claim 19, further comprising preventing the backup external power adapter from supplying direct current to the power output when the primary external power adapter is operational.