Parallel power supply system for low voltage devices

• US 20050280964A1
• Filed: 06/18/2004
• Published: 12/22/2005
• Est. Priority Date: 06/18/2004
• Status: Abandoned Application

• Current Assignee: Hallmark Cards Incorporated
• Original Assignee: Hallmark Cards Incorporated
• Inventors: Butterfield, Freeman E., Carlson, Ronald L., Richmond, Rebecca M.
• Application Number:
  US10/871,866
• Publication Number:
  US 20050280964A1
• Time in Patent Office: Days
• US Class Current: 361/62
• CPC Class Codes: H02J 2310/52 The controlling of the operation of the load not being the total disconnection of the load, i.e. entering a degraded mode or in current limitation
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

A load management controller (LMC) can include a power distribution circuit to supply and regulate current to a plurality of low voltage devices. In certain embodiments, the LMC may receive power from an AC power source and may further include an AC-AC transformer, a microcontroller to regulate voltage and current to user programmable levels, one or supplementary current limiters, and a plurality of receptacles to removably and electrically couple the LMC to the plurality of low voltage devices. In various embodiments, the low voltage devices comprise lights, motors, actuators, and/or audio devices.

Claims

1-16. -16. (canceled)

17. A method for supplying alternating current (AC) to a plurality of ornaments, the method comprising:

providing a transformer having a primary winding and a secondary winding, the primary winding to couple to an AC power source, the secondary winding coupled to the primary winding and sized to provide a stepped-down AC signal;

providing a load management controller (LMC) comprising;

a first input electrically coupled to the stepped-down AC signal;

a plurality of AC output ports to couple AC loads to the LMC; and

at least one current limiter to substantially prevent the current at said first input from exceeding a predetermined threshold; and

indicating power or fault status of the LMC.

18. The method of claim 17, wherein the LMC further comprises a controllable voltage regulator to selectively adjust at least one voltage supplied to the one or more AC output ports.

19. The method of claim 17, wherein the LMC further comprises a controller to selectively control the voltage or current supplied to each ornament according to a predetermined sequence.

20. The method of claim 17, wherein the LMC further comprises:

a direct current (DC) output port for coupling DC loads to the LMC; and

a voltage converter that converts the stepped-down AC signal to provide a regulated DC signal to the DC output port.

21. The method of claim 17, wherein the voltage supplied to one or more of the AC output ports is approximately 6 volts AC.

22. The method of claim 17, wherein the current limiter is resettable.

23. The method of claim 17, wherein the LMC further comprises at least one additional current limiter arranged to substantially prevent electrical current passing through at least one of AC output ports from exceeding a predetermined threshold.

24. The method of claim 17, wherein at least one of the AC output ports comprises a receptacle for a plug to make electrical connection to a load.

25. A method for supplying direct current (DC) to a plurality of ornaments, the method comprising:

providing a transformer having a primary winding and a secondary winding, the primary winding coupled to an alternating current (AC) power source, and the secondary winding coupled to the primary winding to provide a stepped-down AC signal;

providing a load management controller (LMC) comprising;

a first input electrically coupled to the stepped-down AC signal;

a DC module that converts the stepped-down AC signal to one or more regulated DC signals;

a plurality of DC output ports to couple the regulated DC signals to DC loads; and

a current limiter to substantially prevent the current at the first input from exceeding a predetermined threshold, and

indicating power or fault status of the LMC.

26. The method of claim 25, wherein the DC module further comprises one or more voltage regulators that provide one or more of the regulated DC signals.

27. The method of claim 26, wherein at least two of the voltage regulators provide regulated DC signals at voltages that are substantially different.

28. The method of claim 26, wherein the voltage supplied to at least one DC load coupled to the DC output ports is adjusted in response to a control signal.

29. The method of claim 28, wherein the control signal is generated in response to a user input.

30. The method of claim 28, wherein the LMC further comprises a processor that executes program instructions that, when executed by the processor cause the processor to generate the control signal.

31. The method of claim 30, wherein the program instructions, when executed by the processor, further cause the processor to generate a predetermined sequence of control signals that cause voltage supplied to at least one of the DC loads to be adjusted in a predetermined pattern.

32. The method of claim 28, wherein adjusting the voltage comprises alternately supplying and discontinuing power supplied to at least one DC load.

33. The method of claim 28, wherein adjusting the voltage comprises modulating the voltage or current supplied to at least one DC load.

34. The method of claim 25, wherein the LMC is configured to supply to at least one of the DC output ports at least about 0.5 Amp on a continuous basis.

35. The method of claim 25, wherein the LMC is configured to supply to at least one of the DC output ports at least about 0.5 Amp on a continuous basis at a voltage of approximately 6 volts DC.

36. The method of claim 25, wherein the LMC comprises a plurality of DC output ports, and the LMC is configured to supply to each DC output port at least about 0.5 Amp on a continuous basis at a voltage of approximately 6 volts DC.

37. The method of claim 36, wherein the LMC is further configured to supply to each DC output port at least about 0.5 Amp on a continuous basis at a voltage of approximately 6 volts DC.

38. The method of claim 25, wherein the LMC further comprises an AC output port for coupling AC loads to the LMC.

39. The method of claim 25, wherein the LMC further comprises at least one additional current limiter, wherein each additional current limiter is arranged to substantially prevent electrical current that conducts through any of the DC output ports from exceeding a predetermined threshold.

40. The method of claim 25, further comprising coupling to one of the DC output ports at least one electrically-operated ornament that articulates when operated.

41. The method of claim 25, further comprising coupling at least one electrically-operated ornament to any of the DC output ports, wherein the at least one ornament is selected from the group consisting of:

a string comprising a plurality of incandescent lamps;

a string comprising a plurality of light emitting diodes (LEDs);

an ornamental object that articulates in response one of the regulated DC signals; and

an electrically-operated device that outputs a predetermined audio message when operated.

42. The method of claim 25, wherein the LMC further comprises:

a memory containing program instructions; and

a processor configured to execute the program instructions to perform operations.

43. The method of claim 42, wherein the operations comprise controlling the illumination of at least one light emitting diode (LED) or incandescent lamp coupled to an ornament.

44. The method of claim 42, wherein the operations comprise controlling an audio output device to produce an audible output signal.

45. The method of claim 44, wherein the operations further comprise controlling illumination of an ornament in coordination with the audible output signal.

46. The method of claim 25, further comprising supplying an aggregate current of up to about 4 Amps on a continuous basis to loads coupled to any of the DC output ports.

47. The method of claim 25, wherein the current limiter comprises a fuse.

48. The method of claim 25, wherein indicating power or fault status is indicated in response to a current in the LMC exceeding a predetermined threshold.

49. The method of claim 25, wherein the DC load comprises an electrical connector configured to be removably coupled to one of the output port, and further comprises an insulative extension portion that blocks one or more adjacent output ports when the electrical connector is coupled to one of the output ports.