Linear, low EMI/RFE fan control circuit

Details Linear, low EMI/RFE fan control circuit Linear, low EMI/RFE fan control circuit

1987-05-19

1989-02-14

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318345CB, 318806, H02P 540

Patent

active

048049026

ABSTRACT:
A circuit is described for controlling the speed of an A.C. motor driving a cooling fan in response to the temperature at a point being cooled in which a temperature responsive impedance is used to control the current in an impedance of the output circuit of an amplifier that is connected in series or parallel with the windings of the motor.

REFERENCES:
patent: 3324372 (1967-06-01), Myers
patent: 3389315 (1968-06-01), Andreas et al.
patent: 4658197 (1987-04-01), Ligman

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