Shunt field control apparatus and method
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United States of America Patent
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-
Apr 19, 1983
Grant Date -
N/A
app pub date -
Nov 24, 1980
filing date -
Nov 24, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A motor control is provided for a DC series motor operative with a chopper apparatus and including a thyristor switch to determine the field shunt operation of the motor. A voltage reversal that occurs across the field windings when the chopper is OFF and not conducting is utilized to commutate and enable modulation of the field shunt thyristor switch as desired in relation to the chopper ON and OFF operation.
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