Speed control apparatus

Details Speed control apparatus Speed control apparatus

1982-10-20

1985-09-17

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318570, 318603, G05B 1924

Patent

active

045423270

ABSTRACT:
A speed control apparatus according to the present invention includes a pulse generator for generating a number of pulses proportional to an angle of rotation of a servomotor, a speed signal generator for converting the frequency of the pulses into a voltage indicative of an actual speed of the servomotor in order to feed back the voltage through negative feedback, a detector for detecting reversal of the direction of rotation of the servomotor, a positional change detector for detecting the change in a position of the servomotor after the reversal of the direction of rotation of the servomotor by counting the pulses produced by the pulse generator, and a circuit for lowering the voltage indicative of an actual speed until the position of the servomotor has changed beyond a predetermined amount.

REFERENCES:
patent: 3500023 (1970-03-01), Arrowood et al.
patent: 4215301 (1980-07-01), Mason
patent: 4331910 (1982-05-01), Kohzai et al.
patent: 4388570 (1983-06-01), Sangree
European Search Report, The Hague, Oct. 17, 1984.
Annex to European Search Report on European Appln. No. EP82305570.

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