Digital motor speed control

Details Digital motor speed control Digital motor speed control

1982-11-19

1985-05-07

Weldon, Ulysses

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318326, 318327, 318618, H02P 506

Patent

active

045160600

ABSTRACT:
A motor speed control circuit produces indexing pulses during each revolution of the motor. Each indexing pulse triggers the production of a predetermined pattern of timing pulses. The timing pulses are integrated. The result of the integration is a relatively constant level signal that controls the motor current. At the end of a predetermined pattern of pulses in the binary signal, the integrator input signal goes to one of two binary states and causes the integrator output voltage to ramp up or down, as the case may be, until another indexing pulse is received from the motor. The output of the integrator upon receipt of the indexing pulse controls the speed of the motor while another set of binary pulses are being integrated.

REFERENCES:
patent: 3409814 (1968-11-01), Azuma et al.
patent: 3599063 (1971-08-01), Nanai et al.
patent: 3843914 (1974-10-01), Carlson et al.
patent: 4109184 (1978-08-01), Weber
patent: 4218641 (1980-08-01), Arnold et al.
patent: 4280082 (1981-07-01), Acharya et al.

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