Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1998-05-26
2000-08-29
Martin, David
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318603, 388815, 3889075, 388911, G05B 1929
Patent
active
061113840
ABSTRACT:
A method of controlling motor speed. The motor speed control apparatus includes an encoder in mechanical association with the motor. The encoder has one channel providing an encoder signal having a rising and falling state transition for each period of the encoder signal. The periodic frequency of the state transitions are used to precisely measure instantaneous motor speed. A comparitor then compares the periodic frequency with a predetermined motor speed to provide an error signal, representative of the difference. A feedback control system affects the motor speed dependent on the error signals. In a further embodiment, the encoder includes two channels and four state transitions.
REFERENCES:
patent: 4359675 (1982-11-01), Miller
patent: 5198732 (1993-03-01), Morimoto
patent: 5212434 (1993-05-01), Hsieh
patent: 5220266 (1993-06-01), Kobayashi
A Phase-Locked Loop Motor Control System by David H. Smithgall, IEEE, Nov. 1975.
Multifunction Chip Steers Hard Disk Drives, by Robert E. Holm, published in the Electronic System Design Magazine, Apr. 1988.
Motor Control & Driver IC Series, 1987 Toshiba Databook.
Eastman Kodak Company
Martin David
Parulski Susan L.
LandOfFree
Method for controlling motor speed does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for controlling motor speed, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling motor speed will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1253335