Method and apparatus for plug sensing

Details Method and apparatus for plug sensing Method and apparatus for plug sensing

1974-11-20

1976-05-18

Schaefer, Robert K.

Electricity: motive power systems

Braking

'plugging' or application of reverse power to motor

318258, H02P 310

Patent

active

039581632

ABSTRACT:
A method and apparatus for sensing plugging of a DC electric motor comprising logic circuitry responsive to a direction change command for initiating a plugging signal and additional logic circuitry for maintaining said plugging signal as a function of the percentage on time of a variable time ratio switch supplying power to the motor. Inhibit circuitry is provided to override the plugging signal under operator selected conditions.

REFERENCES:
patent: 3641411 (1972-02-01), Nemiroff
patent: 3828235 (1974-08-01), Price et al.
patent: 3843912 (1974-10-01), Anderson
patent: 3855512 (1974-12-01), Konrad
patent: 3872367 (1975-03-01), Kuriyama et al.

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