Controller system for a DC power supply

• US 5,986,434 A
• Filed: 09/25/1997
• Issued: 11/16/1999
• Est. Priority Date: 09/25/1997
• Status: Expired due to Term

• Current Assignee: Astec International Limited (Emerson Electric Company)
• Original Assignee: Astec International Limited (Emerson Electric Company)
• Inventors: Duguay, Louis, Roy, Steve
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US08/936,729
• Time in Patent Office: 782 Days
• Field of Search: 320/116, 320/118, 320/128, 320/138, 320/140, 320/144, 320/150, 320/163, 320/FOR 104, 320/FOR 105, 320/FOR 129, 320/FOR 134, 320/FOR 148 , 320/FOR 154, 320/FOR 155
• US Class Current: 320/128
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• CPC Class Codes: H02J 9/061 for DC powered loads

Abstract

The DC power supply system has a separate controller connected to the AC power rectifiers via a control bus. Improved control features and modularity are achieved.

Claims

1. A controller system for use with a DC power supply system for telecommunications equipment, said system including at least one power rectifier having a controllable DC output current and voltage and at least one battery being charged by said rectifier and providing DC power during absence of AC power to said rectifier, said controller system comprising:

a controller unit provided separate from said rectifier;

voltage sense leads connected across said battery to measure the DC voltage thereof and connected to said unit;

a control signal bus connecting said unit to said rectifier; and

control means associated with said unit for monitoring at least the voltage of said battery and generating variable control signals on said bus for controlling said controllable DC output current and voltage of said rectifier, whereby said bus signals facilitate interconnection between said rectifier and the separate controller unit.

2. The system as claimed in claim 1, wherein said control signal bus is connected to a plurality of said rectifiers.

3. The system as claimed in claim 1, wherein said control means comprises a communications interface means for communicating operational status information from said system to a remote network.

4. The system as claimed in claim 1, further comprising a temperature probe for measuring the temperature of said battery, wherein said control means comprise means for adjusting said rectifier voltage in accordance with said battery temperature.

5. The system as claimed in claim 4, wherein said adjusting means comprise means for setting a temperature compensation factor.

6. The system as claimed in claim 1, wherein said control means comprise means for adjusting a float value of said rectifier.

7. The system as claimed in claim 1, wherein said control means comprise means for setting said rectifier output current.

8. The system as claimed in claim 1, wherein said control bus comprises a rectifier fail alarm signal, and said control means comprises a communications interface means for communicating operational status information from said system to a remote network, said status information including an operational status of said rectifier.

9. The system as claimed in claim 1, wherein said control bus comprises an AC mains fail alarm signal indicative of presence of AC mains power to said rectifier, and said control means comprises a communications interface means for communicating operational status information from said system to a remote network, said status information including an operational status of said AC mains.

10. The system as claimed in claim 1, wherein said control means comprises a non-volatile memory for storing an operational status history of said system.

11. The system as claimed in claim 3, wherein said control means comprises a non-volatile memory for storing operational status history data of said system, said communication means communicating said data to said remote network.

12. A DC power supply system for telecommunications equipment comprising:

a plurality of power rectifiers having a controllable DC output current and voltage;

means interconnecting said power rectifiers to operate synchronously at a same voltage;

at least one battery being charged by said rectifiers and providing DC power for said telecommunications equipement during absence of AC power to said rectifier;

a controller unit provided separate from said rectifiers;

voltage sense leads connected across said battery to measure the DC voltage thereof and connected to said controller unit;

a control signal bus connecting said controller unit to said rectifiers; and

control means associated with said controller unit for monitoring the voltage of said at least one battery and generating variable control signals on said bus for controlling said controllable DC output current and voltage of said rectifiers, whereby said bus signals facilitate interconnection between said rectifiers and the separate controller unit.

13. The system as claimed in claim 12, wherein said control means comprises a communications interface means for communicating operational status information from said system to a remote network.

14. The system as claimed in claim 12, further comprising the temperature probe for measuring a temperature of said battery, wherein said control means comprise means for adjusting said rectifier voltage in accordance with said battery temperature.

15. The system as claimed in claim 14, wherein said adjusting means comprise means for setting a temperature compensation factor.

16. The system as claimed in claim 12, wherein said control means comprise means for adjusting a float value of said rectifier voltage.

17. The system as claimed in claim 12, wherein control means comprise means for setting said rectifier output current.

18. The system as claimed in claim 12, wherein said control bus comprises a rectifier fail alarm signal, and said control means comprises a communications interface means for communicating operational status information from said system to a remote network, said status information including an operational status of said rectifier.

19. The system as claimed in claim 12, wherein said control bus comprises an AC mains fail alarm signal indicative of the presence of AC mains power to said rectifier, and said control means comprises a communications interface means for communicating operational status information from said system to a remote network, said status information including an operational status of said AC mains.

20. The system as claimed in claim 12, wherein said control means comprises a non-volatile memory for storing an operational status history of said system.

21. The system as claimed in claim 13, wherein said control means comprises a non-volatile memory for storing operational status history data of said system, said communication means communicating said data to said remote network.