Power converter with selectively variable output and controller and display system therefor

• US 5,982,643 A
• Filed: 10/10/1996
• Issued: 11/09/1999
• Est. Priority Date: 10/10/1996
• Status: Expired due to Term

• Current Assignee: Progressive Dynamics, Inc.
• Original Assignee: Progressive Dynamics, Inc.
• Inventors: Phlipot, Thomas H.
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): Jardieu, Derek J.
• Application Number:
  US08/729,053
• Time in Patent Office: 1,125 Days
• Field of Search: 363/39-43, 363/26, 363/97-98, 363/25, 323/351, 323/322, 323/909, 320/149, 320/160, 320/162
• US Class Current: 363/25
• CPC Class Codes: H02J 7/0069 Charging or discharging for charge maintenance, battery initiation or rejuvenation
• CPC Class Codes: H02M 3/33515 with digital control
• CPC Class Codes: H02M 3/3372 of the parallel type
• CPC Class Codes: Y02B 40/00 Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors
• CPC Class Codes: Y10S 323/909 Remote sensing

Abstract

A system to control the output voltage of a power converter in response to a specific load battery condition. The system contains a power converter, a TCMS interface attached thereto and a controller for selectively and/or adaptably changing the magnitude of converter output voltage. A control module is incorporated in the system to automatically change converter output voltage up or down in response to the load (input) voltage. The module contains a microcontroller to sense the battery (input) voltage process said input voltage with an analog-to-digital converter. The microcontroller is programmed to execute a series of routines to determine the proper charging voltage for the system. Thereafter, the control module communicates this information through the interface of the power converter to cause the power converter to charge at the optimum voltage. In the alternative, a plug-in component containing passive circuitry may be used to manually signal the power converter to charge at a predetermined voltage.

Claims

1. A remotely controllable electric power supply, comprising in combination:

an input for receiving operating power from a source;

an output for supplying power to a load connected thereto at a desired voltage level different from that supplied to said input by said source;

circuitry between said input and output for modifying and conditioning said operating power to produce said output power, said circuitry including a voltage-variable portion for changing the voltage level of said output in response to an applied control voltage indicative of an actual voltage of said load;

an interface coupled to said voltage-variable circuitry portion to apply said control voltage thereto;

a command module coupled to said interface for providing said control voltage for application to said voltage-variable portion of said power supply circuitry to change said output level, said command module including a processor programmed to change said control voltage and thus said output voltage level as a function of at least certain predetermined parameters; and

sensing circuitry for monitoring said certain parameters, including said actual voltage of said load, and transmitting signals representative thereof to said command module for use in changing said control voltage.

2. A remotely controllable power supply according to claim 1, wherein said interface communicates outwardly of and beyond the immediate location of said power supply to a different location, and said command module is at least partially located at said different location.

3. A remotely controllable power supply according to claim 1 including an analog interface device having passive circuitry to provide a predetermined voltage signal for setting the output of said supply at a desired level.

4. A remotely controllable power supply according to claim 3, wherein said passive circuitry is incorporated within a self-contained plug-in module.

5. A remotely controllable power supply according to claim 1, wherein said control module includes at least one manually actuatable switch for selectively initiating at least one predetermined change in said output level by the action of an operator.

6. A remotely controllable power supply according to claim 5, wherein said interface communicates outwardly of and beyond the immediate location of said power supply to a different location, and said command module and manually actuatable switch are at least partially located at said different location.

7. A remotely controllable power supply according to claim 6, wherein said control module further includes a visual display for indicating an instantaneous value of at least said output level.

8. A remotely controllable power supply according to claim 7, including sensing circuitry coupled to said load and to said command module to provide signals representative of said certain parameters, wherein said load includes a storage battery and said sensing circuitry includes components to determine the charge state of said battery, and wherein said visual display indicates a value of said battery charge state.

9. A remotely controllable power supply according to claim 5, wherein said processor is programmed to override said manually actuatable switch as a function of predetermined power supply output conditions.

10. A remotely controllable power supply accordingly to claim 9, wherein said predetermined output conditions include passage of a predetermined time interval at a predetermined output level.

11. A remotely controllable power supply according to claim 9, wherein said control module further includes a visual display for indicating an instantaneous value of at least said output level.

12. A remotely controllable power supply according to claim 11, including sensing circuitry coupled to said load and to said command module to provide signals representative of said certain parameters, wherein said load includes a storage battery and said sensing circuitry includes components to determine the charge state of said battery, and wherein said visual display indicates a value of said battery charge state.

13. A remotely controllable power supply according to claim 12, wherein said interface communicates outwardly of and beyond the immediate location of said power supply to a different location, and said command module is at least partially located at said different location.

14. A remotely controllable power supply according to claim 1, including sensing circuitry coupled to said load and to said command module to provide signals representative of said certain parameters, wherein said load includes a storage battery and said at least one detector includes circuitry and components to determine the charge state of said battery, and wherein said control module includes a visual display and said visual display indicates a value of said battery charge state.

15. A remotely controllable power supply according to claim 14, wherein said control module includes at least one manually actuatable switch for selectively initiating at least one predetermined change in said output level by the action of an operator.

16. A remotely controllable power supply according to claim 15, wherein said control module further includes a visual display for indicating an instantaneous value of at least said output level.

17. A remotely controllable power supply according to claim 16, wherein said processor is programmed to override said manually actuatable switch as a function of predetermined output level conditions.

18. A remotely controllable power supply according to claim 1, wherein said certain predetermined parameters include the magnitude of electrical current flow from said source providing operating power to said power supply and said sensing circuitry includes apparatus for monitoring said current flow magnitude.

19. A remotely controllable power supply according to claim 18, wherein said command module changes said control voltage to reduce said power supply output in response to said monitored current flow magnitude.

20. A remotely controllable power supply according to claim 18, wherein said command module changes said control voltage to vary said power supply output as a function of said monitored current flow magnitude.

21. A remotely controllable power supply according to claim 18, wherein said command module changes said control voltage to substantially interrupt said power supply output as a function of said monitored current flow magnitude at predetermined level.

22. A remotely controllable power supply according to claim 21, wherein said command module changes said control voltage to effectively turn said power supply output on and off as a function of said monitored current flow magnitude at a predetermined maximum level.

23. A remotely controllable power supply according to claim 1, wherein said sensing circuitry is coupled to said load and to said command module to provide signals representative of load excitation level.

24. A remotely controllable power supply according to claim 23 is furthered programmed to activate an LED when said power supply is on.

25. A remotely controllable power supply according to claim 23, wherein said load includes a storage battery and said sensing circuitry includes components to determine the charge state of said battery.

26. A remotely controllable power supply according to claim 25, wherein said command module processor is programmed to provide a plurality of differing output levels from said power supply to effect correspondingly different charge states for said storage battery as a function of predetermined operating criteria including said charge state determined by said sensing circuitry.

27. A remotely controllable power supply according to claim 26, wherein said differing output levels said processor is programmed to provide include a normal charge level, a trickle charge level of lower magnitude than said normal level, and a boost charge level which is of greater magnitude than said normal level.

28. A remotely controllable power supply according to claim 27, wherein said processor is programmed to automatically change said Normal, Boost and Trickle output levels from one to another thereof as a function of at least said charge state determined by said sensing circuitry.

29. A remotely controllable power supply according to claim 28, wherein said battery is connected to and provides operating power for a user system and said processor is programmed to produce said boost output level in response to detection of a predetermined low level of said user system operating voltage.

30. A remotely controllable power supply according to claim 29, wherein said processor is programmed to discontinue said boost output level upon detection of user system operating voltage levels exceeding said predetermined low level and at least equal to said normal level.

31. A remotely controllable power supply according to claim 29, wherein said processor is programmed to discontinue said Boost output level upon detection of user system operating voltage levels exceeding said Normal level but less than said Boost level.

32. A remotely controllable power supply according to claim 29, wherein said processor is programmed to discontinue said boost output level upon passage of a predetermined length of time.

33. A remotely controllable power supply according to claim 29, wherein said processor is programmed to discontinue said boost output level upon either detection of user system operating voltage levels exceeding said predetermined low level and at least equal to said normal level or upon passage of a predetermined length of time, whichever occurs first.

34. A remotely controllable power supply according to claim 26, wherein said processor is also programmed to include time as a determinant used in automatically changing said differing output levels from one to another.

35. A remotely controllable power supply according to claim 34, wherein said processor is programmed to automatically initiate a Storage Mode by a reduced output level when said charge state determined by said sensing circuitry has not varied from a predetermined value during a predetermined interval of elapsed time.

36. A remotely controllable power supply according to claim 35, wherein said processor is further programmed to automatically discontinue said Storage Mode by increasing said output level upon sensed change in the existing charge state of said storage battery.

37. A remotely controllable power supply according to claim 36, wherein said processor is further programmed to discontinue said Storage Mode by initially changing said reduced output level to an elevated output level which exceeds the charge levels used during normal operation.

38. A remotely controllable power supply according to claim 37, wherein said processor is further programmed to automatically discontinue said elevated output level after a predetermined interval of elapsed time.

39. A remotely controllable power supply according to claim 38, wherein said processor is further programmed to automatically initiate said normal charge output level upon discontinuation of said elevated level following said predetermined time interval.

40. A control system for use with an electric power converter having an output voltage whose magnitude is a function of internal converter circuitry which includes a signal-responsive circuit portion operative to selectively change the output voltage of said electric power converter from a first value to any of a plurality of different second values comprising:

an interface electrically connected to said signal-responsive circuit portion and physically communicating externally of said power converter, for receiving a control signal from an external source and applying such signal to said signal-responsive circuit portion;

a control module located externally of said converter and adapted to be coupled to said interface to apply a control signal indicative of an actual voltage of a load to said interface corresponding to a selected particular different such second value output voltage, said control signal applied by said interface to said signal-responsive circuit portion to thereby change the output of said converter from said first value to said selected different second value from said location external to said converter.

41. A control system for a power converter according to claim 40 wherein said control module includes an analog device having passive circuitry to provide a predetermined output as said control signal for setting the output of said converter at a predetermined desired level.

42. A control system for a power converter according to claim 41, wherein said control module comprises at least in part a self-contained plug-in module and said interface includes a port into which said module may be plugged, whereby said passive circuitry is made interconnectable with said power converter circuit.

43. The control system of claim 40 wherein said control module comprises:

a first analog circuit for conditioning a signal input;

a second analog circuit for providing said control signal at a preselected level;

a connecting means for transmitting said control signal from said module to said power converter by said interface;

a processor for executing a control program stored in memory and supplying a signal representative of a predetermined mode of operation;

a clock for providing timing signals to said processor;

a switch connected to said processor for manually controlling the output voltage of said power converter; and

a display for signaling converter output.

44. The control system of claim 43 wherein said processor further comprises:

a Boost subroutine to execute a control program stored in memory which increases charging voltage of said power converter;

a Storage subroutine to execute a control program stored in memory which controls sleep mode operation of said power converter;

a timer subroutine to execute a control program stored in memory which returns said power to Normal Mode operation.

a status subroutine to execute a control program stored in memory which operates an LED to indicate the on/off status of said converter.

45. The control system of claim 43 wherein said control module includes:

a series of switches for manually controlling the converter output voltage;

a series of LED'"'"'s coupled to said switches for identifying and displaying information regarding converter mode of operation.

46. The control system of claim 45 wherein the processor further comprises:

a switch check subroutine to execute a control program stored in memory which cycles through Sleep, Normal, and Boost Modes of operation;

a storage subroutine to execute a control program stored in memory which controls sleep mode operation of the power converter;

A LED test subroutine to execute a control program stored in memory which identifies problems;

a long time-out subroutine to execute a control program stored in memory which deactivates the system if it has been inactive for a predetermined time; and

a display subroutine to execute a control program stored in memory which controls the LEDs used to signal mode of operation.

47. A control system for a power converter according to claim 41, wherein said control module comprises a selectively variable device for selectively changing said control signal and thereby selecting another and different output level for said converter.

48. A control system for a power converter according to claim 42, wherein said control module comprises one of a plurality of selectively interchangeable such plug-in modules, each such module having circuitry to provide a different such control signal for correspondingly varying said converter output.

49. A remotely controllable electric power supply, comprising in combination:

an input for receiving operating power from a source;

an output for supplying power to a load connected thereto at a desired voltage level different from that supplied to said input by said source;

circuitry between said input and output for modifying and conditioning said operating power to produce said output power, said circuitry including a voltage-variable portion for changing the voltage level of said output in response to an applied control voltage indicative of an actual voltage of said load;

an interface coupled to said voltage-variable circuitry portion to apply said control voltage thereto;

a command module coupled to said interface for providing said control voltage for application to said voltage-variable portion of said power supply circuitry to change said output level, said command module including circuitry to change said control voltage and thus said output voltage level as a function of at least certain predetermined parameters; and

sensing circuitry for monitoring said certain parameters, including said actual voltage of said load, and transmitting signals representative thereof to said command module for use in changing said control voltage.