Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1980-12-11
1983-02-01
Truhe, J. V.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318318, 318327, 318329, 318345E, H02P 506
Patent
active
043718191
ABSTRACT:
A pulse width modulation (PWM) speed control for a DC electric motor includes an encoder for providing encoder pulses in reponse to incremental rotation of a shaft driven by the motor. A timer senses a time period between encoder pulses. After three consecutive sensed time periods, a microcomputer compares the sensed time periods with a desired time period corresponding to a desired motor speed, and provides a digital value which is a function of the comparison of the sensed and desired time periods. The ditigal value is supplied to a timer, which applies an energizing pulse to the DC motor for an interval which is a function of the digital value.
REFERENCES:
patent: 4066941 (1978-01-01), Foster
patent: 4078192 (1978-03-01), Fultz
patent: 4153863 (1979-05-01), Schachte et al.
patent: 4258300 (1981-03-01), Fromont
patent: 4260936 (1981-04-01), Sun
patent: 4278924 (1981-07-01), Mawatari et al.
patent: 4280082 (1981-07-01), Acharya et al.
patent: 4298832 (1981-11-01), Acker et al.
"Microprocessor-Based Controller", by Y. T. Chan et al., IEEE vol. IECI-27, No. 3, Aug. 1980, pp. 169-176.
Moose Richard M.
Pako Corporation
Truhe J. V.
LandOfFree
Pulse width modulation speed control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pulse width modulation speed control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pulse width modulation speed control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2408791