Auto self test of AC motor system

Details Auto self test of AC motor system Auto self test of AC motor system

1990-12-20

1993-11-30

Nguyen, Vinh

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324158MG, G08B 2100

Patent

active

052668916

ABSTRACT:
Apparatus and method for auto-self testing of a power converter and motor system wherein the power converter has three parallel legs, each including two series connected gate-turn-off thyristors (GTO) connected between a pair of DC power source buses. A microprocessor controls the test sequence in which each GTO is individually turned on in a predetermined order so as to create a transient snubber current through the motor and through each GTO when it is turned on. The snubber current and a voltage in each leg is measured and compared to a respective reference to detect wiring errors, and defects in the motor, the GTOs, and other system components. Error messages are generated in response to detection of abnormalities or defects.

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patent: 4908756 (1990-03-01), Higashino
patent: 4926306 (1990-05-01), Ueda et al.
patent: 4953069 (1990-08-01), Braun et al.
"SC 30000 1.5 Micron Standard Cells"; RCA Solid State 1987; pp. 1-225.

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