New protective circuits have been developed for power-factor ac motor controllers. Circuits prevent direct current and consequent motor heating that would normally result from failure of solid-state switch in controller. Single-phase power-factor controller with short detector compensates for short-circuit failure in either direction by applying full power to motor. Controller with open detector compensates for open-circuit failure in either direction by turning off power to motor.
Failure Detector for Power-Factor Controller
NASA Tech Briefs ; 6 , 3
1982-12-01
Miscellaneous
No indication
English
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