Power dissipation is ac induction motor is reduced by circuit that lowers applied voltage when motor is idling or only lightly loaded. Timing voltages in phase with motor current are sensed a cross gate-controlled semiconductor whitch with motor, rather than across high-power resistor, as in earlier version.
Improved power factor controller
NASA Tech Briefs ; 5 , 2
01.09.1980
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Englisch
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