Control circuit for feedback, motor-operated valve

Details Control circuit for feedback, motor-operated valve Control circuit for feedback, motor-operated valve

1995-03-16

1995-11-28

Ro, Bentsu

Electricity: motive power systems

Braking

'plugging' or application of reverse power to motor

318379, H02P 312

Patent

active

054711231

ABSTRACT:
A control circuit for limiting the current flow to a direct-current driven motor, to reduce current spikes at motor start up, including a voltage-regulated, current-passing device for passing current from a direct voltage source to the motor, the device having a default configuration such as to permit full current flow there-across when the voltage is initially applied, a voltage drop device interposed the voltage source and the voltage-regulated, current-passing device responsive to the current flow to the motor and a variable-voltage output device responsive to the voltage drop developed in the voltage-drop device for providing a subsequently changing voltage for input to the current-passing device for limiting the current flow therethrough following initial application of the voltage.

REFERENCES:
patent: 3579064 (1971-05-01), Taylor
patent: 3628112 (1971-12-01), Gross
patent: 3919611 (1975-11-01), Takahashi et al.
patent: 4374352 (1983-02-01), Webster
patent: 4736146 (1988-04-01), Bettendorf
patent: 4922161 (1990-05-01), Gilliland et al.
patent: 5268622 (1993-12-01), Philipp

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