TRIAC/SCR-based energy savings device for reducing a predetermined amount of voltage using pulse width modulation

• US 8,085,010 B2
• Filed: 08/06/2008
• Issued: 12/27/2011
• Est. Priority Date: 08/24/2007
• Status: Active Grant

• Current Assignee: Powerwise Group, Inc.
• Original Assignee: Powerwise Group, Inc.
• Inventors: Lumsden, John L
• Primary Examiner(s): Berhane, Adolf
• Assistant Examiner(s): Jackson, Lakaisha
• Application Number:
  US12/187,136
• Publication Number:
  US 20090051344A1
• Time in Patent Office: 1,238 Days
• Field of Search: 323/237, 323/241, 323/244, 323/266, 323/274, 323/283, 323/300, 323/320, 323/322, 323/223, 323/224, 323/225, 323/239
• US Class Current: 323/239
• CPC Class Codes: H02M 5/2576 with digital control

Abstract

A TRIAC/SCR-based energy savings device, system and method (1) wherein a predetermined amount of voltage below a nominal line voltage and/or below a nominal appliance voltage is saved, thereby conserving energy. Phase input connections (2) are provided for inputting analog signals into the device and system (1). A magnetic flux concentrator (3) senses the incoming analog signal (20) and a volts zero crossing point detector (5) determines the zero volts crossing point (21) of the signal (20). The positive half cycle (22) and negative half cycle (23) of the signal (20) are identified and routed to a digital signal processor (10) for processing the signal (20). The signal (20) is reduced by pulse width modulation and the reduced amount of energy is outputted, thereby yielding an energy savings for an end user.

Claims

1. An TRIAC/SCR-based energy savings device comprising:

at least one phase input connection for inputting a predetermined amount of incoming energy having at least one analog signal into said energy savings device, wherein said at least one analog signal is an AC signal;

at least one sensing means connected to said at least one phase input connection for sensing said predetermined amount of incoming energy entered into said energy savings device;

at least one volts zero crossing point detector in electrical connection with said at least one phase input connection for determining at least one zero volts crossing point of said at least one analog signal;

at least one digital signal processor in electrical connection with said at least one volts zero crossing point detector for processing said at least one analog signal;

at least one voltage reducing means having at least one drive control wherein said at least one voltage reducing means is in electrical connection with said at least one digital signal processor for reducing said predetermined amount of incoming energy by providing pulse width modulation to the at least one analog signal to yield a reduced amount of energy; and

at least one phase output connection in electrical connection with said at least one voltage reducing means for outputting said reduced amount of energy out of said energy savings device;

wherein said digital signal processor is configured to determine a firing angle of said at least one analog signal that will provide a predetermined root-mean-square voltage; and

wherein said at least one drive control is configured to reduce said predetermined amount of incoming energy to said predetermined root-mean-square voltage using said firing angle.

2. The TRIAC/SCR-based energy savings device of claim 1 further comprising:

at least one analog signal conditioning device for conditioning said at least one analog signal of said energy exiting said at least one sensing means;

wherein said at least one drive control comprises a first SCR device and a second SCR device arranged as an inverse parallel pair.

3. The TRIAC/SCR-based energy savings device of claim 2 wherein:

said at least one analog signal conditioning device has a first filter for removing or reducing harmonics and transients or interfering signals of said energy exiting said at least one magnetic flux concentrator.

4. The TRIAC/SCR-based energy savings device of claim 3 wherein:

said at least one analog signal conditioning device has a second filter for permitting at least one phase change if necessary.

5. The TRIAC/SCR-based energy savings device of claim 2 further comprising:

at least one power supply unit in electrical connection with said energy savings device for powering said energy savings device;

wherein a transorb and a varistor are each connected across said first and second SCR devices.

6. The TRIAC/SCR-based energy savings device of claim 5 further comprising:

at least computing device in electrical connection with said energy savings device;

wherein a resistor and a capacitor are connected in series across said first and second SCR devices.

7. The TRIAC/SCR-based energy savings device of claim 6 further comprising:

at least one USB communications interface in electrical connection between said at least one digital signal processor and said at least one computing device;

wherein an optically isolated driver is configured to turn on said first and second SCR devices.

8. The TRIAC/SCR-based energy savings device of claim 7 wherein:

said at least one sensing means comprises a magnetic flux concentrator that is configured to measure said predetermined amount of incoming energy via galvanic isolation; and

wherein said sensing means further comprises two comparators configured as a window comparator to pass a signal to said digital signal processor in an over current condition.

9. The TRIAC/SCR-based energy savings device of claim 7 wherein:

said at least one USB communications interface permits a user to monitor said predetermined amount of energy inputted into said energy savings system and said reduced energy outputted from said energy savings system.

10. The TRIAC/SCR-based energy savings device of claim 1 wherein:

said at least one drive control comprises a TRIAC device.

11. The TRIAC/SCR-based energy savings device of claim 10 wherein:

a transorb and a varistor are each connected across said TRIAC device; and

a resistor and a capacitor in series are connected across said TRIAC device.

12. The TRIAC/SCR-based energy savings device of claim 1 wherein:

said at least one sensing means is a magnetic flux concentrator that measures said predetermined amount of energy via galvanic isolation.

13. The TRIAC/SCR-based energy savings device of claim 12 wherein:

said magnetic flux concentrator is located on at least one printed circuit board;

said at least one printed circuit board is located on at least one housing; and

said housing is removably securable to a conductor electrically connecting said at least one phase input connection to said at least one analog signal conditioning device.

14. The TRIAC/SCR-based energy savings device of claim 13 wherein:

said at least one housing includes a top half and a bottom half hingedly secured to one another.

15. The TRIAC/SCR-based energy savings device of claim 1 wherein:

said at least one volts zero crossing point detector for determining at least one volts zero crossing point of said at least one analog signal is at least one comparator and at least one Schmidt buffer.

16. The TRIAC/SCR-based energy savings device of claim 15 wherein:

said at least one comparator has a reference point of approximately half a supply voltage.

17. The TRIAC/SCR-based energy savings device of claim 1 further comprising:

at least one lost phase detection device in electrical connection with said at least one analog signal conditioning device.

18. The TRIAC/SCR-based energy savings device of claim 17 further comprising:

at least one phase rotation device in electrical connection with said at least one analog signal conditioning device.

19. The TRIAC/SCR-based energy savings device of claim 1 further comprising:

at least one floating power supply in electrical connection with said at least one voltage reducing means.

20. The TRIAC/SCR-based energy savings device of claim 1 wherein:

said at least one phase output connection is a single phase output system.

21. The TRIAC/SCR-based energy savings device of claim 1 wherein:

said at least one phase output connection is a bi-phase output system.

22. The TRIAC/SCR-based energy savings device of claim 1 wherein:

said at least one phase output connection is a three-phase output system.

23. The TRIAC/SCR-based energy savings device of claim 1 further comprising:

at least one reset switch in electrical connection with said at least one digital signal processor.

24. The TRIAC/SCR-based energy savings device of claim 23 further comprising:

at least one light emitting diode in electrical connection with said at least one reset switch.

25. The TRIAC/SCR-based energy savings device of claim 1 further comprising:

at least one phase rotation device in electrical connection with said at least one analog signal conditioning device.

26. An TRIAC/SCR-based energy savings device comprising:

at least one power supply unit in electrical connection with said energy savings device for powering said energy savings device;

at least one phase input connection for inputting a predetermined amount of incoming energy having at least one analog signal into said energy savings device;

at least one sensing means connected to said at least one phase input connection for sensing said predetermined amount of incoming energy entered into said energy savings device via galvanic isolation;

at least one analog signal conditioning device for conditioning said at least one analog signal of said energy exiting said at least one magnetic flux concentrator;

at least one volts zero crossing point detector in electrical connection with said at least one phase input connection for determining at least one zero volts crossing point of said at least one analog signal;

at least one digital signal processor in electrical connection with said at least one volts zero crossing point detector for processing said at least one analog signal;

at least one voltage reducing means having at least one drive control wherein said at least one voltage reducing means is in electrical connection with said at least one digital signal processor for reducing said predetermined amount of incoming energy to yield a reduced amount of energy by providing pulse width modulation to the at least one analog signal;

at least one phase output connection in electrical connection with said at least one voltage reducing means for outputting said reduced energy out of said energy savings device;

at least one reset switch in electrical connection with said at least one digital signal processor;

at least one USB communications interface in electrical connection with said at least one digital signal processor; and

at least computing device in electrical connection with said energy savings device;

wherein said digital signal processor is configured to determine a firing angle of said at least one analog signal that will provide a predetermined root-mean-square voltage; and

wherein said at least one drive control is configured to reduce said predetermined amount of incoming energy to said predetermined root-mean-square voltage using said firing angle.

27. The TRIAC/SCR-based energy savings device of claim 26 further comprising:

at least one phase rotation device in electrical connection with said at least one analog signal conditioning device;

wherein said at least one drive control comprises a first SCR device and a second SCR device arranged as an inverse parallel pair; and

wherein a transorb and a varistor are each connected across said first and second SCR devices.

28. An TRIAC/SCR-based energy savings system comprising:

a means for inputting a predetermined amount of incoming energy into said energy savings system;

a means for sensing said predetermined amount of incoming energy entered into said energy savings system;

a means for conditioning at least one analog signal of said energy;

a means for determining at least one volts zero crossing point of said at least one conditioned analog signal;

a means for processing said at least one conditioned analog signal;

a means for reducing said at least one conditioned analog signal of said predetermined amount of energy to yield a reduced amount of energy; and

a means for outputting said reduced energy out of said energy savings system;

wherein said means for processing is configured to determine a firing angle of said at least one analog signal that will provide a predetermined root-mean-square voltage; and

wherein said at least one drive control is configured to reduce said predetermined amount of incoming energy to said predetermined root-mean-square voltage using said firing angle.

29. The TRIAC/SCR-based energy savings system of claim 28 wherein:

said means for reducing comprises a first SCR device and a second SCR device arranged as an inverse parallel pair; and

said means for reducing said predetermined amount of energy is via pulse width modulation.

30. The TRIAC/SCR-based energy savings system of claim 29 further comprising:

a transorb and a varistor each connected across said first and second SCR devices; and

a means for communicating with at least one computing device.

31. The TRIAC/SCR-based energy savings system of claim 30 further comprising:

a resistor and a capacitor connected in series across said first and second SCR devices; and

a means for resetting said energy savings system.

32. The TRIAC/SCR-based energy savings system of claim 31 further comprising:

an optically isolated driver configured to turn on said first and second SCR devices; and

a means for communicating with at least one computing device.

33. The TRIAC/SCR-based energy savings system of claim 31 further comprising:

a means for detecting loss of said means for inputting a predetermined amount of energy into said energy savings system.

34. The TRIAC/SCR-based energy savings system of claim 33 wherein:

said means for detecting loss of said means for inputting a predetermined amount of energy into said energy savings system is at least one lost phase detection device in electrical connection with said means for conditioning said at least one analog signal of said energy.

35. The TRIAC/SCR-based energy savings system of claim 30 further comprising:

a means for communicating with at least one computing device.

36. The TRIAC/SCR-based energy savings system of claim 28 wherein:

said means for determining at least one volts zero crossing point of said at least one conditioned analog signal is at least one volts zero crossing point detector having at least one comparator and at least one Schmidt buffer.

37. The TRIAC/SCR-based energy savings system of claim 28 further comprising:

a means for calculating a location on said at least one conditioned analog signal where said at least one analog signal should be reduced to determine a root-mean-square value.

38. The TRIAC/SCR-based energy savings system of claim 37 wherein:

said means for calculating a location on said at least one conditioned analog signal where said at least one analog signal should be reduced to determine a root-mean-square value is by determining at least one firing angle of said at least one conditioned analog signal.

39. The TRIAC/SCR-based energy savings system of claim 38 further comprising:

a means for comparing said at least one conditioned analog signal to said at least one analog signal to determine a ratio wherein said ratio is equal to a predefined root-mean-square value.

40. The TRIAC/SCR-based energy savings system of claim 28 wherein:

said means for processing said at least one conditioned analog signal is at least one digital signal processor that performs a pulse width modulation function.

41. The TRIAC/SCR-based energy savings system of claim 28 wherein:

said means for reducing is configured to provide pulse width modulation via at least one TRIAC device.

42. The TRIAC/SCR-based energy savings system of claim 41 further comprising:

an isolated optically coupled driver configured to turn-on and turn-off said TRIAC device; and

a resistor and a capacitor connected in series across said TRIAC device.

43. The TRIAC/SCR-based energy savings system of claim 28 further comprising:

a means for powering said energy savings system.

44. The TRIAC/SCR-based energy savings system of claim 28 wherein:

said means for sensing said predetermined amount of energy entered into said energy savings system is at least one magnetic flux concentrator that measures current with galvanic isolation; and

wherein said means for sensing further comprises two comparators configured as a window comparator to pass a signal to said means for processing in an over current condition.

45. The TRIAC/SCR-based energy savings system of claim 28 wherein:

said means for conditioning at least one analog signal of said energy is at least one analog signal conditioning device that substantially reduces harmonics and any transients or interfering signals in said at least one analog signal; and

wherein said means for reducing utilizes pulse width modulation with a TRIAC device.

46. The TRIAC/SCR-based energy savings system of claim 28 further comprising:

a means for rotating said means for inputting a predetermined amount of energy into said energy savings system.

47. The TRIAC/SCR-based energy savings system of claim 46 wherein:

said means for rotating said means for inputting a predetermined amount of energy into said energy savings system is at least one phase rotation device in electrical connection with said means for conditioning said at least one analog signal of said energy.

48. A method for using an TRIAC/SCR-based energy savings device comprising at least one phase input connection for inputting a predetermined amount of incoming energy having at least one analog signal into said energy savings device;

at least one sensing means connected to said at least one phase input connection for sensing said predetermined amount of incoming energy entered into said energy savings device;

at least one volts zero crossing point detector in electrical connection with said at least one phase input connection for determining at least one zero volts crossing point of said at least one analog signal;

at least one digital signal processor in electrical connection with said at least one volts zero crossing point detector for processing said at least one analog signal;

at least one voltage reducing means having at least one drive control wherein said at least one voltage reducing means is in electrical connection with said at least one digital signal processor for reducing said predetermined amount of incoming energy by providing pulse width modulation to the at least one analog signal to yield a reduced amount of energy; and

at least one phase output connection in electrical connection with said at least one voltage reducing means for outputting said reduced energy out of said energy savings device, said method comprising steps of;

a. inputting a predetermined amount of energy having at least one analog signal into said energy savings device;

b. sensing said predetermined amount of energy entered into said energy savings device;

c. determining at least one volts zero crossing point of said at least one analog signal;

d. processing said at least one analog signal;

e. determining a firing angle of said at least one analog signal that provides a predetermined root-mean-square voltage;

f. reducing said predetermined amount of energy by providing pulse width modulation to said at least one analog signal using said firing angle; and

g. outputting said reduced amount of energy out of said energy savings device;

wherein said outputted energy is said predetermined root-mean-square voltage.

49. The method of claim 48 further comprising a step after step c of:

detecting at least one loss of said at least one phase input connection;

wherein said step of reducing is performed with said at least one drive control utilizing a first SCR device and a second SCR device arranged as an inverse parallel pair.

50. The method of claim 49 further comprising the steps of:

reporting said at least one loss to said at least one digital signal processor; and

clamping a first spike of energy during a first switching operation with a transorb device connected across said first and second SCR devices.

51. The method of claim 50 further comprising a step after reporting said at least one loss to said at least one logic device of:

rotating remaining phase input connections.

52. The method of claim 51 further comprising a step after processing said at least one analog signal of:

conditioning said at least one analog signal.

53. The method of claim 49 further comprising a step after detecting at least one loss of said at least one phase input connection of:

rotating remaining phase input connections.

54. The method of claim 48 further comprising a step after step d of:

conditioning said at least one analog signal.

55. The method of claim 48 further comprising a step prior to step a of:

powering said energy savings device;

wherein said step of reducing is performed with said at least one drive control utilizing a TRIAC device to provide pulse width modulation.

56. The method of claim 48 further comprising a step prior to step a of

programming an energy savings amount into said energy savings device.

57. The method of claim 48 further comprising a step after step f of:

programming an energy savings amount into said energy savings device.

58. The method of claim 57 further comprising a step after powering said energy savings device of:

programming an energy savings amount into said energy savings device.

59. The method of claim 48 prior to step e of:

pulse width modulating said at least one analog signal.

60. The method of claim 48 further comprising a step prior to step f of:

pulse width modulating said at least one analog signal.

61. The method of claim 48 further comprising a step after step e of:

sensing said reduced amount of energy.

62. The method of claim 48 wherein:

said pulse width modulation is accomplished via at least one TRIAC.

63. The method of claim 48 wherein:

said pulse width modulation is accomplished via at least one SCR.

64. The method of claim 48 further comprising a step after step d of:

calculating a location on said at least one conditioned analog signal where said at least one analog signal should be reduced to determine a root-mean-square value.

65. The method of claim 64 wherein:

said location on said at least one conditioned analog signal where said at least one analog signal should be reduced to determine a root-mean-square value is calculated by determining a firing angle of said at least one conditioned analog signal.

66. The method of claim 65 further comprising a step after calculating a location on said at least one conditioned analog signal where said at least one analog signal should be reduced to determine a root-mean-square value of:

comparing said at least one conditioned analog signal to said at least one analog signal to determine a ratio wherein said ratio is equal to a predetermined root-mean-square value.