Control circuit for feedback, motor-operated valve

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

1994-01-03

1995-10-24

Ro, Bentsu

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318286, 318379, 318431, 318467, 25112912, F16K 3104, H02P 118

Patent

active

054612900

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 thereacross 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: 4282467 (1981-08-01), Gruesbeck
patent: 4445075 (1984-04-01), Fry
patent: 5137257 (1992-08-01), Tice

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