Load control system and method

• US 6,927,546 B2
• Filed: 04/28/2003
• Issued: 08/09/2005
• Est. Priority Date: 04/28/2003
• Status: Expired due to Fees

• Current Assignee: Google Inc. (Alphabet Inc.)
• Original Assignee: Colorado vNet, LLC
• Inventors: Hesse, Scott, Nicolay, William, Adamson, Hugh P.
• Primary Examiner(s): Wong, Don
• Assistant Examiner(s): A, MINH D
• Application Number:
  US10/424,345
• Publication Number:
  US 20040212325A1
• Time in Patent Office: 834 Days
• Field of Search: 315/291, 315/307, 315/224, 315/312, 315/347, 315/349, 315/350
• US Class Current: 315/312
• CPC Class Codes: H05B 47/165 following a pre-assigned programmed sequence; Logic control [LC]

Abstract

A load control systems and methods. One embodiment of a load control system comprises at least two triac devices connected in parallel to a load, the at least two triac devices operable to deliver current to the load. At least one driver circuit is linked to the at least two triac devices. A controller is linked to the at least one driver circuit, the controller signaling the at least one driver circuit to actuate the at least two triac devices at about the same time.

Claims

1. A configurable system for controlling at least one load, comprising:

a circuit board;

a plurality of triac devices mounted on said circuit board;

a plurality of connectors operatively associated with said plurality of triac devices, said plurality of connectors selectively connecting at least one of said plurality of triac devices in parallel with at least one other of said plurality of triac devices to said at least one load;

plurality of driver circuits provided on said circuit board, each of said plurality of driver circuits connected to each of said plurality of triac devices, at least one of said plurality of driver circuits operable to actuate each of said plurality of triac devices connected in parallel at about the same time to balance the total current delivered to the at least one load substantially equally through each of said plurality of triac devices connected in parallel.

2. The configurable system of claim 1, further comprising a controller operatively associated with said plurality of driver circuits, said controller signaling at least one of said plurality of driver circuits to actuate each of said triac devices selectively connected in parallel.

3. The load control system of claim 2, wherein said controller logically connects the selected triac devices in parallel.

4. The configurable system of claim 1, wherein at least one of said plurality of driver circuits comprises an opto-coupler.

5. The configurable system of claim 1, wherein at least one of said plurality of driver circuits comprises a pulse transformer.

6. The configurable system of claim 1, further comprising a housing and a cover, said circuit board mounted to said cover and at least partially enclosed in said housing.

7. The configurable system of claim 1, further comprising a painted cover, said circuit board mounted to said painted cover.

8. The load control system of claim 1, further comprising at least one heat sink thermally coupled to said plurality of triac devices.

9. A load control system, comprising:

at least two triac devices connected in parallel to a load, said at least two triac devices operable to deliver current to the load;

at least one driver circuit linked to said at least two triac devices;

a controller linked to said at least one driver circuit, said controller signaling said at least one driver circuit to actuate said at least two triac devices at about the same time; and

program code operativey associated with said controller, said program code for signaling said at least one driver circuit up to about 255 times every half AC cycle to actuate each said at least two triac devices connected in parallel.

10. The load control system of claim 9, wherein said at least two triac devices are connected in parallel logically by said controller.

11. The load control system of claim 9, further comprising a sensor circuit operatively associated with at least said two triac devices and with said controller, said sensor circuit indicating an operating arrangement of the load control system to said controller.

12. The load control system of claim 9, further comprising program code operatively associated with said controller, said program code for defining an operating arrangement of the load control system.

13. The load control system of claim 9, wherein said controller is operatively associated with a CAN bus, said controller signaling said at least one driver circuit in response to a signal over said CAN bus.

14. The load control system of claim 9, wherein said controller repeatedly signals said at least one driver circuit to actuate said at least two triac devices.

15. The load control system of claim 9, further comprising a status system operatively associated with said controller, said status system indicating a status of the load control system.

16. The load control system of claim 15, wherein said status system further comprises at least one temperature sensor.

17. The load control system of claim 15, wherein said status system further comprises at least one current sensor.

18. The load control system of claim 9, further comprising at least one triac device connected individually to another load.

19. A load control system, comprising:

at least two triac devices connected in parallel to a load, said at least two triac devices operable to deliver current to the load;

at least one driver circuit linked to said at least two triac devices; and

a controller linked to said at least one driver circuit and operatively associated with a CAN bus, said controller signaling said at least one driver circuit to actuate said at least two triac devices at about the same time in response to receiving a signal over said CAN bus.

20. The load control system of claim 19, wherein said at least two triac devices are connected in parallel logically by said controller.

21. The load control system of claim 19, further comprising a sensor circuit operatively associated with at least said two triac devices and with said controller, said sensor circuit indicating an operating arrangement of the load control system to said controller.

22. The load control system of claim 19, further comprising program code operatively associated with said controller, said program code for defining an operating arrangement of the load control system.

23. The load control system of claim 19, further comprising program code operatively associated with said controller, said program code for signaling said at least one driver circuit to actuate each said at least two triac devices connected in parallel.

24. The load control system of claim 23, wherein said program code signals said at least one driver circuit up to about 255 times every half AC cycle.

25. The load control system of claim 19, wherein said controller repeatedly signals said at least one driver circuit to actuate said at least two triac devices.

26. The load control system of claim 19, further comprising a status system operatively associated with said controller, said status system indicating a status of the load control system.

27. The load control system of claim 26, wherein said status system further comprises at least one temperature sensor.

28. The load control system of claim 26, wherein said status system further comprises at least one current sensor.

29. The load control system of claim 19, further comprising at least one triac device connected individually to another load.

30. A system for controlling at least one load with a plurality of triac devices, comprising:

means for logically connecting the plurality of triac devices in parallel;

actuating means for actuating the plurality of semiconductor switching devices connected in parallel at about the same time to balance the total current delivered to the at least one load substantially equally through each of the plurality of triac devices connected in parallel; and

program code means for signaling said actuating means up to about 255 times every half AC cycle for actuating each of said plurality of triac devices.

31. A system for controlling at least one load with a plurality of triac devices, comprising:

means for logically connecting the plurality of triac devices in parallel; and

actuating means for actuating the plurality of semiconductor switching devices connected in parallel at about the same time to balance the total current delivered to the at least one load substantially equally through each of the plurality of triac devices connected in parallel; and

controller means operatively associated with a CAN bus for signaling said actuating means in response to receiving a signal over said CAN bus.

32. A method for controlling at least one load, comprising:

reconfigurably connecting at least one triac device in parallel with at least one other triac device for providing current to the at least one load;

actuating each of said plurality of triac devices connected in parallel at about the same time to balance the total current delivered to the at least one load substantially the same portions through each of said plurality of triac devices connected in parallel; and

repeatedly signaling each of said plurality of triac devices connected in parallel up to about 255 times during each half AC cycle.

33. The method of claim 32, wherein reconfigurably connecting at least one triac device in parallel with at least one other triac device at least logically connects the triac devices in parallel.