Abnormality detecting system for DC motor control apparatus

Details Abnormality detecting system for DC motor control apparatus Abnormality detecting system for DC motor control apparatus

1979-11-16

1981-06-23

Smith, Jr., David

Electricity: motive power systems

With signals, meters, recorders or testing devices

318327, 318463, 340648, H02P 516

Patent

active

042753422

ABSTRACT:
In a DC motor control apparatus for driving a DC motor in accordance with a signal of the difference between a revolving speed signal from a speed detector coupled with the DC motor and a command speed signal so as to drive the DC motor at a revolving speed indicated by the command speed signal, when a voltage to be applied to the DC motor and the revolving speed signal from the speed detector are both detected, the operation of the DC motor control apparatus is decided as normal, and when the voltage to the DC motor is detected but the revolving speed signal from the speed detector is not detected, the operation of the DC motor control apparatus is decided as abnormal and an alarm signal is produced.

REFERENCES:
patent: 3406319 (1968-10-01), Faulkes
patent: 3576485 (1971-04-01), Coons, Jr.
patent: 3778696 (1973-12-01), Walters
patent: 4030012 (1977-06-01), Buhler
patent: 4091314 (1978-05-01), Johnson
patent: 4141244 (1979-02-01), Dumbeck

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