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

1996-01-30

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Movement, position, or limit-of-travel

318286, 318379, 25112912, F16K 3104

Patent

active

054882753

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: 3565402 (1971-02-01), Linke
patent: 3731170 (1973-05-01), Emmert
patent: 3949696 (1976-04-01), Onishi et al.
patent: 4223256 (1980-09-01), Espenschied
patent: 4246526 (1981-01-01), Phillips
patent: 4509127 (1985-04-01), Yuki et al.
patent: 4794314 (1988-12-01), Janu et al.

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