Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1981-03-11
1983-03-01
Truhe, J. V.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318317, H02P 506
Patent
active
043756093
ABSTRACT:
A speed control circuit has a comparator which compares a voltage signal which is indicative of the actual speed of a shaft with a digital reference which is indicative of the desired speed of the shaft. If the actual speed is different than the desired shaft speed, a bi-directional control mechanism is operated in one direction or the other to adjust the actual speed of the shaft. The operation of the bi-directional control mechanism is periodically interrupted to increment the amount the actual shaft speed is changed to prevent overshoot of the desired speed.
REFERENCES:
patent: 3629633 (1971-12-01), O'Callaghan
patent: 3953776 (1976-04-01), Wolf
patent: 4129810 (1978-12-01), Harshberger, Jr.
patent: 4280082 (1981-07-01), Acharya et al.
ABEX Corporation
Baker Jr. Thomas S.
Duncanson Jr. W. E.
Greenlee David A.
Truhe J. V.
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