Universal electric power controller

• US 5,886,422 A
• Filed: 07/30/1997
• Issued: 03/23/1999
• Est. Priority Date: 07/30/1997
• Status: Expired due to Fees

• Current Assignee: Spartec International Corporation
• Original Assignee: Spartec International Corporation
• Inventors: Mills, Andrew
• Primary Examiner(s): NGUYEN, MATTHEW VAN
• Application Number:
  US08/902,894
• Time in Patent Office: 601 Days
• Field of Search: 307/18, 307/25-29, 307/38, 307/40, 307/43, 307/69, 307/72-75, 307/82, 307/84
• US Class Current: 307/29
• CPC Class Codes: H02P 5/60 controlling combinations of dc and ac dynamo-electric motors H02P5/46 takes precedence

Abstract

An electrical power supply and controller for supplying electrical power from a common platform in a plurality of distinct electrical waveforms, including voltages, and frequency, and to a plurality of distinct loads including distinct motor loads, and controlling alternatively the speed and torque of these motor loads. The power supply and controller of this invention automatically accepts and adjusts to an electrical input across a wide range of electrical waveforms, including voltage and frequency, and includes an interface for accepting a plurality of distinct computer programs for controlling each load type. The electrical power supply and controller supplies electrical power to the plurality of distinct load modules, accepts the plurality of distinct electrical inputs, and accepts the plurality of distinct computer programs without any modification to the electrical power supply and controller itself.

Claims

1. In a power conversion and control apparatus for supplying operating voltage to a load which may be of any of a plurality of different types that require operating voltages having different respective waveforms and different respective magnitudes or frequencies, said power conversion and control apparatus being of the type having a plurality of power input terminals, a plurality of power output terminals for connection to said load, a switching network connected between said power input terminals and said power output terminals, and a programmable control circuit responsive to at least one feedback signal from said load and to a stored program for controlling said operating voltage, in combination:

a first program memory coupled to said programmable control circuit for storing a first portion of said stored program, said first portion including that portion of said stored program which is independent of the type of load that is connected to said power output terminals;

a memory interface connector coupled to said programmable control circuit for receiving any one of a plurality of different second program memories for storing a second portion of said stored program, each of said second portions corresponding to one of said plurality of types of load, and each being adapted to cooperate with said first program memory to control said one of said plurality of types of load, when said corresponding type of load is connected to said power output terminals;

whereby said power conversion and control apparatus may be configured for operation with any of said different types of load by connecting a corresponding second program memory to said memory interface connector.

2. A power conversion and control apparatus as set forth in claim 1 in which said power input terminals include a plurality of AC input terminals for connection to any one of a plurality of different types of AC sources and a plurality of DC input terminals for connection to at least one type of DC source.

3. A power conversion and control apparatus as set forth in claim 2 in which said power input terminals define an input interface assembly having a predetermined standardized format, whereby any one of a plurality of different types of AC and DC sources may be interchangeably connected to said switching network.

4. A power conversion and control apparatus as set forth in claim 1 in which said power input terminals include a plurality of AC power input terminals and DC power input terminals, further including a plurality of DC power busses, rectifying means for rectifying an AC input voltage appearing between said AC power input terminals and applying the rectified AC voltage to said DC power busses, and means for connecting said switching network between said DC power busses and said DC output terminals.

5. A power conversion and control apparatus as set forth in claim 1 further including a load interface assembly for detachably receiving any one of said plurality of different loads.

6. A power conversion and control apparatus as set forth in claim 5 in which said memory interface connector has a predetermined standardized format, whereby any of said plurality of different second program memories may be interchangeably received by said memory interface connector.

7. A power conversion and control apparatus as set forth in claim 5 in which said load interface assembly has a predetermined standardized format, whereby any of said loads may be interchangeably received by said load interface assembly.

8. A power conversion and control apparatus as set forth in claim 5 in which said load is a motor, in which said load interface assembly includes connectors for receiving feedback signals indicative of at least one of motor position, motor torque, and motor speed.

9. A power conversion and control apparatus as set forth in claim 1 in which said second portion of said stored program defines at least one of the waveform of the voltage to be applied to said the load, the magnitude of the voltage to be applied to said load and the frequency of the voltage to be applied to said load.

10. A power conversion and control apparatus as set forth in claim 9 in which said voltage is a pulse width modulated voltage.

11. A power conversion and control apparatus as set forth in claim 1 in which said switching network comprises a multi phase switching circuit which is adapted to controllably provide either a chopped DC output voltage or a pulse width modulated AC output voltage.

12. A power conversion and control apparatus as set forth in claim 1 further including a pair of DC power busses, rectifying means for full wave rectifying an AC input voltage appearing between said AC power input terminals and applying the full wave rectified AC voltage to said DC power busses, and a DC to DC converter having an input connected to said power busses and an output connected to said programmable control circuit, said DC to DC converter serving as means for maintaining an approximately constant operating voltage for said programmable control circuit as the magnitude of said AC input voltage varies.

13. A power conversion and control apparatus as set forth in claim 1 in which said different types of loads include a plurality of types of DC motors and a plurality of types of AC motors.

14. A power conversion and control apparatus as set forth in claim 1 in which said different types of loads include at least one of a DC motor, a DC brushless motor module, an AC induction motor, a switched reluctance AC motor, and a 3Φ

AC motor.

15. A power conversion and control apparatus as set forth in claim 1 in which said first program memory is a read write memory.

16. A power conversion and control apparatus as set forth in claim 15 in which said second program memory includes a non-volatile memory.

17. In a power conversion and control apparatus for supplying a controllable operating voltage from a selected one of an AC source and a DC source to a load, in combination:

a set of AC and DC power input terminals;

a set of power output terminals for connection to a load module of any one of a plurality of different types, said types having different respective operating voltage and control requirements;

a power buss;

rectifying means for connecting said AC and DC power terminals to said power buss;

switching means for controllably connecting said power buss to said power output terminals and thereby providing an operating voltage to said load module;

processing means responsive to a stored program for controlling the switching activity of said switching means;

a built in memory for storing a first segment of said stored program, said segment being independent of the type of load module connected to said output terminals;

a plug in memory for storing a second segment of said stored program, said second segment being specific to the type of load module connected to said output terminals; and

a memory interface for connecting said plug in memory to said processing means.

18. A power conversion and control apparatus as set forth in claim 17 wherein said AC source includes one of a plurality of different types of AC sources, and said DC source includes one of a plurality of different types of DC sources.

19. A power conversion and control apparatus as set forth in claim 17 wherein said AC and DC power input terminals define an input interface assembly wherein any of a plurality of different types of AC and DC sources may be interchangeably connected to said programmable conversion and control apparatus.

20. A power conversion and control apparatus as set forth in claim 17 wherein said power output terminals define a load interface assembly having a standardized format, wherein any of a plurality of different types of load modules may be interchangeably connected to said programmable conversion and control apparatus.

21. A power conversion and control apparatus as set forth in claim 17 wherein said types of load modules include at least one of a DC motor, a DC brushless motor, an AC motor, a flux vector AC motor, and a switched reluctance AC motor.

22. A power conversion and control apparatus as set forth in claim 17 wherein said load module is a motor module;

in which said power output terminals include terminals for receiving feedback signals indicative of at least one of motor position, motor torque, and motor speed.

23. A power conversion and control apparatus as set forth in claim 17 wherein said second program segment defines at least one of the waveform of the voltage to be applied to said load module, the magnitude of the voltage to be applied to said load module, and the frequency of the voltage to be applied to said load module.

24. A power conversion and control apparatus as set forth in claim 17 wherein said switching means is adapted to establish a pulse width modulated voltage at said power output terminals.

25. A power conversion and control apparatus as set forth in claim 17 in which said switching means comprises a multi phase switching circuit which is adapted to controllably provide either a dropped DC voltage or a pulse width modulated AC voltage at said power output terminals.

26. A power conversion and control apparatus as set forth in claim 17 further including an internal power supply for maintaining an approximately constant operating voltage for said processing means as the magnitude of said AC input voltage varies, said internal power supply having an input connected to said power buss.

27. A power conversion and control apparatus as set forth in claim 17 in which said different types of load modules include at least one of a plurality of types of DC motors, and at least one of a plurality of types of AC motors.

28. A power conversion and control apparatus as set forth in claim 17 in which said memory interface has a predetermined standardized format, whereby any of a plurality of different plug in modules may be interchangeably connected to said processing means.

29. A power conversion and control apparatus as set forth in claim 17 in which said built in memory is a read write memory.

30. A power conversion and control apparatus as set forth in claim 29 in which said plug in memory includes a flash memory.