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

1996-08-06

Ro, Bentsu

Electricity: motive power systems

Braking

Dynamic braking

318431000, H02P 312

Patent

active

055436943

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: 4208868 (1980-06-01), Regnier et al.
patent: 4353021 (1982-10-01), Watanabe et al.
patent: 4517502 (1985-05-01), Aschoff et al.
patent: 4574228 (1986-03-01), Blue et al.

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