Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1985-05-06
1987-03-10
Shoop, Jr., William M.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318317, 318331, 318318, 318341, H02P 516
Patent
active
046493271
ABSTRACT:
The motor control circuit is constituted by a current controlling circuit having a first output terminal connected to a source terminal via a resistor, a second output terminal connected to the source terminal through a motor to be controlled, the currents outputted by the first and second output terminals being controlled by an input signal, a reference voltage generator producing a constant reference voltage, a comparator comparing the reference voltage with the output voltage of the second output voltage, a drive circuit responsive to the output voltage of the comparator for applying a control signal to the current controlling circuit, and a limiter which prevents the voltage at the first output terminal of the current controlling circuit from becoming lower than the reference voltage.
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Ip Shik Luen Paul
NEC Corporation
Shoop Jr. William M.
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