Speed control system for repulsion motor

• US 6,108,488 A
• Filed: 02/10/1999
• Issued: 08/22/2000
• Est. Priority Date: 03/26/1993
• Status: Expired due to Fees

• Current Assignee: Lambert Haner
• Original Assignee: Lambert Haner
• Inventors: Haner, Lambert
• Primary Examiner(s): Masih, Karen
• Application Number:
  US09/248,498
• Time in Patent Office: 559 Days
• Field of Search: 318/725, 318/254, 318/138, 318/439, 318/724, 318/700, 318/720, 318/721, 318/726, 388/811
• US Class Current: 388/811
• CPC Class Codes: H02K 29/10 using light effect devices
• CPC Class Codes: H02K 37/00 Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
• CPC Class Codes: H02P 1/24 for starting an individual ac commutator motor starting of ac/dc commutator motors H02P1/18
• CPC Class Codes: H02P 25/102 Repulsion motors
• CPC Class Codes: H02P 6/00 Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor vector control H02P21/00

Abstract

A speed control system for a brushless repulsion motor of the type including a series of armature mounted switches for shorting circumferentially spaced armature coils, said system comprising: a digital counter on the armature for creating a repetitive succession of switch activating signals in a selected sequence at a given rate determined by the counting rate of the counter; means for activating the switches with the signals in the sequence and at the rate to control the speed of the armature; and, means for directing a reference pulse signal at a reference frequency to the counter to set the counting rate of the counter.

Claims

1. A speed control system for a brushless repulsion motor of the type including a series of armature mounted switches for shorting circumferentially spaced armature coils, said system comprising:

a digital counter on said armature for creating a repetitive succession of switch activating signals in a selected sequence at a given rate determined by the counting rate of said counter;

means for activating said switches with said signals in said sequence and at said rate to control the speed of said armature; and

, means for directing a reference pulse signal at a reference frequency to said counter to set said counting rate of said counter.

2. A speed control system as defined in claim 1 wherein said counting rate is at said reference frequency.

3. A speed control as defined in claim 1 including means for creating a rotational pulse signal with a rotational frequency proportional to-the-speed of said armature and subtracting means for creating said counting rate as the difference between said reference frequency and said rotational frequency.

4. A speed control as defined in claim 3 wherein subtracting means is said counter wherein said counter is an up/down counter with an up count input and a down count input and said reference pulse signal being connected to one of said inputs and said rotational pulse signal being connected to said other input.

5. A speed control system as defined in claim 4 wherein said one input is said up count input.

6. speed control system as defined in claim 4 wherein said one input is said down count input.

7. A speed control system as defined in claim 4 including means for reversing said pulse signals with respect to said inputs to reverse the direction of rotation of said repulsion motor.

8. A speed control system as defined in claim 7 including means for changing said reference frequency of said reference pulse signal to change the set speed of said repulsion motor.

9. A speed control system as defined in claim 3 including means for changing said reference frequency of said reference pulse signal to change the set speed of said repulsion motor.

10. A speed control system as defined in claim 2 including means for changing said reference frequency of said reference pulse signal to change the set speed of said repulsion motor.

11. A speed control system as defined in claim 1 including means for changing said reference frequency of said reference pulse signal to change the set speed of said repulsion motor.

12. A speed control system as defined in claim 11 including a fixed remote means for creating said reference pulse signal.

13. A speed control system as defined in claim 12 wherein said remote means includes an oscillator and a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

14. A speed control system as defined in claim 12 wherein said remote means includes means for directing a synchronizing frequency signal to a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

15. A speed control system as defined in claim 2 including a fixed remote means for creating said reference pulse signal.

16. A speed control system as defined in claim 15 wherein said remote means includes an oscillator and a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

17. A speed control system as defined in claim 15 wherein said remote means includes means for directing a synchronizing frequency signal to a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

18. A speed control system as defined in claim 3 including a fixed remote means for creating said reference pulse signal.

19. A speed control system as defined in claim 18 wherein said remote means includes an oscillator and a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

20. A speed control system as defined in claim 18 wherein said remote means includes means for directing a synchronizing frequency signal to a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

21. A speed control system as defined in claim 4 including a fixed remote means for creating said reference pulse signal.

22. A speed control system as defined in claim 21 wherein said remote means includes an oscillator and a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

23. A speed control system as defined in claim 21 wherein said remote means includes means for directing a synchronizing frequency signal to a signal transmitting device adjacent said armature for transmitting said reference pulse signal toward said armature and a detector on said armature for receiving said reference pulse signal.

24. A speed control system as defined in claim 12 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

25. speed control system as defined in claim 11 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

26. A speed control system as defined in claim 10 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

27. A speed control system as defined in claim 9 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

28. A speed control system as defined in claim 4 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

29. A speed control system as defined in claim 3 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

30. A speed control system as defined in claim 2 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

31. A speed control system as defined in claim 1 including a position signal emitting device fixed at a given position with respect to the rotation of said armature, a series of detectors with one of said detectors associated with each of said armature mounted coils, said detectors creating a coincidence signal when one of said detectors receives said position signal when its associate armature mounted coil is shorted;

and, means for inhibiting said reference pulse signal to said counter upon creation of coincidence signal.

32. A speed control system as defined in claim 31 including means for reversing the counting direction of said digital counter to reverse the direction of said repulsion motor.

33. A speed control system as defined in claim 9 including means for reversing the counting direction of said digital counter to reverse the direction of said repulsion motor.

34. A speed control system as defined in claim 10 including means for reversing the counting direction of said digital counter to reverse the direction of said repulsion motor.

35. A speed control system as defined in claim 11 including means for reversing the counting direction of said digital counter to reverse the direction of said repulsion motor.

36. A speed control system as defined in claim 2 including means for reversing the counting direction of said digital counter to reverse the direction of said repulsion motor.

37. A speed control system as defined in claim 1 including means for reversing the counting direction of said digital counter to reverse the direction of said repulsion motor.

38. A speed control method for a brushless repulsion motor of the type including a series of armature mounted switches for shorting circumferentially spaced armature coils, said method comprising:

(a) creating a repetitive succession of switch activating signals in a selected sequence at a given rate; and

(b) activating said switches with said signals in said sequence and at said rate to control the speed of said armature.

39. A speed control method as defined in claim 38 including the additional step of changing said given rate to change the set speed of said repulsion motor.

40. A speed control method as defined in claim 38 including the additional steps of

(c) creating a coincidence signal when one of said armature mounted coils is shorted at a given position;

and, inhibiting said switch activating signals upon creation of coincidence signal.

41. A speed control method as defined in claim 40 including the additional step of reversing direction of said sequence of said signals to reverse the direction of said repulsion motor.

42. A speed control method as defined in claim 39 including the additional step reversing direction of said sequence of said signals to reverse the direction of said repulsion motor.

43. A speed control method as defined in claim 38 including the additional step of reversing direction of said sequence of said signals to reverse the direction of said repulsion motor.

44. A speed control system for a brushless repulsion motor of the type including a series of armature mounted switches for shorting circumferentially spaced armature coils, said system comprising:

means for creating a repetitive succession of switch activating signals in a selected sequence at a given rate; and

, activating said switches with said signals in said sequence and at said rate to control the speed of said armature.

45. A speed control system as defined in claim 44 including means for sensing a decrease in said armature speed below said controlled speed and means for inhibiting said signals upon said sensed decrease.

46. A speed control system as defined in claim 44 including means for changing said given rate to change said armature speed.

47. A speed control system as defined in claim 46 wherein said signal creating means is a digital counter counting at the rate of the frequency of an input pulse signal and said rate changing means includes an oscillator for creating said input pulse signal at a frequency controlled by the voltage at the input of said oscillator.

48. A speed control system as defined in claim 44, including means for reversing the sequence of said signals to reverse the direction of said repulsion motor.

49. A speed control system for a brushless repulsion motor of the type including a series of armature mounted switches for shorting circumferentially spaced armature coils, said system comprising:

a digital up/down counter on said armature for creating a repetitive succession of switch activating signals in a selected sequence, said counter having an up count input and a down count input;

means for activating said switches with said signals in said sequence; and

, means for directing a reference pulse signal at a reference frequency to one input of said counter and a rotational pulse signal at a frequency controlled by the speed of said armature with the difference in said pulse signals used to set said counting rate of said counter and thus the speed of said armature.

50. A speed control as defined in claim 49 with means for adjusting said reference frequency to change the speed of said armature.

51. A speed control as defined in claim 50 including means for reversing the inputs of said pulse signals to reverse the direction of said armature.

52. A speed control as defined in claim 51 including means for inhibiting said reference pulse signal when said armature experiences a high torque.

53. A speed control as defined in claim 52 wherein said high torque is a maximum torque.

54. A speed control as defined in claim 49 including means for reversing the inputs of said pulse signals to reverse the direction of said armature.

55. A speed control as defined in claim 54 including means for inhibiting said reference pulse signal when said armature experiences a high torque.

56. A speed control as defined in claim 55 wherein said high torque is a maximum torque.

57. A speed control as defined in claim 49 including means for inhibiting said reference pulse signal when said armature experiences a high torque.

58. A speed control as defined in claim 57 wherein said high torque is a maximum torque.