Brushless repulsion motor speed control system

• US 7,053,586 B2
• Filed: 10/29/2004
• Issued: 05/30/2006
• Est. Priority Date: 11/04/2003
• Status: Expired due to Fees

• Current Assignee: Dynamotors Incorporated
• Original Assignee: Dynamotors Incorporated
• Inventors: Jones, William M.
• Primary Examiner(s): Martin, David
• Assistant Examiner(s): HORN, ROBERT WAYNE
• Application Number:
  US10/977,268
• Publication Number:
  US 20050093504A1
• Time in Patent Office: 578 Days
• Field of Search: 318/725
• US Class Current: 318/400.4
• CPC Class Codes: H02P 25/102 Repulsion motors

Abstract

A system for controlling the speed of a brushless repulsion motor having a series of switches mounted on a rotating armature for shorting circumferentially spaced armature coils comprising first stationary signaling means and a plurality of rotating detectors for activating said switches; second stationary signaling means for speed control; a plurality of markers on the rotating armature; a speed detector for detecting the speed of the rotating markers and generating a speed feedback signal; means for generating a speed command signal; an error calculator for comparing the speed feedback and speed command signals and generating an error signal; and a controller for controlling the signaling means based on the error signal.

Claims

1. A system for controlling the speed of a brushless repulsion motor having a stator and a rotating armature with a series of switches mounted on a printed circuit board on the rotating armature for shorting circumferentially spaced armature coils, the system comprising:

LED signaling means and a plurality of rotating detectors for activating and deactivating the switches;

a first stationary photo transmitter on the motor for sending a signal to be used for speed control;

a plurality of alternating reflective and non-reflective markers on the PC board of the rotating armature for speed control;

a first stationary photo detector on the motor for detecting the speed of the rotating markers and generating a speed feedback signal;

generating means on the motor for generating a speed command signal;

an error calculator on the motor for comparing the speed feedback and speed command signals and generating an error signal;

an LED controller on the motor for controlling the LED signaling means based on the error signal, wherein the LED controller is operative to adjust the LED signaling means in the positive or negative torque sector to correct the speed of the rotating armature;

a second stationary photo transmitter on the motor for sending a signal to be used for position control;

a position marker on the PC board of the rotating armature; and

a second stationary photo detector on the motor for detecting the position marker to determine the position of the armature coils and sending a position feedback signal to the controller for maintaining the set speed.

2. The system defined in claim 1, further comprising:

at least one position marker associated with each coil.

3. The system defined in claim 1, wherein the markers are mounted flat on the armature.

4. The system defined in claim 1, wherein the markers are mounted on the peripheries of the armature.

5. A system for controlling the speed of a brushless repulsion motor having a stator and a rotating armature with a series of switches mounted on a printed circuit board on the rotating armature for shorting circumferentially spaced armature coils, the system comprising:

LED signaling means and a plurality of rotating detectors for activating and deactivating the switches;

a plurality of magnetic markers on the PC board of the rotating armature for speed control;

a first stationary magnetic pickup means on the motor for detecting the speed of the rotating markers and generating a speed feedback signal;

generating means on the motor for generating a speed command signal;

an error calculator on the motor for comparing the speed feedback and speed command signals and generating an error signal;

an LED controller on the motor for controlling the LED signaling means based on the error signal, wherein the LED controller is operative to adjust the LED signaling means in the positive or negative torque sector to correct the speed of the rotating armature;

a magnetic position marker on the PC board of the rotating armature; and

a second stationary magnetic pickup means on the motor for detecting the position marker to determine the position of the armature coils and sending a position feedback signal to the controller for maintaining the set speed.

6. The system defined in claim 5, further comprising at least one magnetic position marker associated with each coil.

7. The system defined in claim 5, wherein the magnetic markers are mounted flat on the armature.

8. The system defined in claim 5, wherein the magnetic markers are mounted on the peripheries of the armature.

9. The system defined in claim 8, further comprising at least one magnetic position marker associated with each coil.

10. A system for controlling the speed of a brushless repulsion motor having a stator and a series of switches mounted on a PC board on the rotating armature for shorting circumferentially spaced armature coils, the system comprising:

a photo transmitter on the rotating armature for sending a signal to be used for speed control;

a plurality of alternating reflective and non-reflective markers on the stator for speed control;

a photo detector on the rotating armature for detecting the speed of the motor via the signal and generating a corresponding speed feedback signal;

generating means on the rotating armature for generating a speed command signal;

an error calculator on the rotating armature for comparing the speed feedback and speed command signals and generating an error signal;

receiving means on the rotating armature for receiving the error signal and for activating and deactivating the switches based upon the error signal;

a position marker on stator; and

a second photo detector on the rotating armature for detecting the position marker via the signal to determine the position of the armature coils and for sending a position feedback signal to the receiving means.

11. A speed control system for a brushless repulsion motor having a stator, an armature, and a series of coil switches on a PC board on the armature for shorting a succession of armature coils, the speed control system comprising:

at least one position marker on the armature for determining armature coil position;

an LED signaling array for providing an optical signal;

at least one position detector for detecting the armature coil position marker via the LED array;

a plurality of markers on the armature for determining armature speed;

a speed detector for detecting the speed of the armature via the LED array;

a timer for controlling the speed of the armature and the desired speed of the motor at the precise time as determined by the position of one of the armature coils;

means for generating a speed command signal;

an error calculator for comparing the speed feedback arid speed command signals; and

wherein the speed detector generates a speed feedback signal and the position detector generates a position feedback signal.

12. A speed control system for a brushless repulsion motor having a stator, an armature, and a series of coil switches on a PC board on the armature for shorting a succession of armature coils, the speed control system comprising:

at least one magnetic position marker on the armature for determining armature coil position;

an LED signaling array for providing an optical signal for use in activating the coil switches;

a first pickup means for detecting the magnetic armature coil position marker;

a plurality of magnetic markers on the armature for determining armature speed;

a second pickup means for detecting the speed of the armature via the plurality of magnetic markers;

a timer for controlling the speed of the armature and the desired speed of the motor at the precise time as determined by the position of one of the armature coils;

means for generating a speed command signal;

an error calculator for comparing the speed feedback and speed command signals; and

wherein the speed detector generates a speed feedback signal and the position detector generates a position feedback signal.

13. A speed control system for a brushless repulsion motor having a stator, an armature, and a series of coil switches on a PC board on the armature for shorting a succession of armature coils, the speed control system comprising:

generating means on the motor for generating coded signals for speed control;

transmitting means on the motor for transmitting the coded signals to the armature;

receiving means on the armature for receiving the coded signals;

decoding means on the armature for decoding the coded signals; and

activation means on the armature for activating and deactivating the coil switches.

14. The speed control system defined in claim 13, wherein the transmitting means comprises an RF transmitter.

15. The speed control system defined in claim 14 wherein the receiving means comprises an RF receiver.

16. The speed control system defined in claim 14, wherein the receiving means comprises a tuned receiving coil.

17. The speed control system defined in claim 16, further comprising an encoder for position feedback.

18. A system for controlling the speed of a brushless repulsion motor having a stator and a series of switches mounted on a PC board on the rotating armature for shorting circumferentially spaced armature coils, the system comprising:

a plurality of magnetic markers on the stator for speed control;

first pickup means on the rotating armature for detecting the magnetic markers and for generating a speed feedback signal;

generating means on the rotating armature for generating a speed command signal;

an error calculator on the rotating armature for comparing the speed feedback and speed command signals and for generating an error signal;

receiving means on the rotating armature for receiving the error signal and for activating and deactivating the switches based upon the error signal;

a magnetic position marker on the stator; and

second pickup means on the rotating armature for detecting the magnetic position marker on the rotating armature to determine the position of the armature coils and for sending a position feedback signal to the receiving means.