Control system for an electric motor
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United States of America Patent
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-
May 27, 1986
Grant Date -
N/A
app pub date -
Sep 15, 1983
filing date -
Sep 17, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control system for a motor which drives a tape capstan includes a capacitor (91) which holds a sample of a ramp signal which is sampled and restarted in response to tachometer pulses. The output of an amplifier (90, 100) which amplifies the difference between the stored voltage and a reference is integrated by a passive integrator (106, 92) coupled to the capacitor (91). The arrangement provides prediction of change of a discontinuous speed signal and is useful for slow running motors of low inertia.
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