Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1994-03-08
1997-01-07
Wysocki, Jonathan
Electricity: motive power systems
Induction motor systems
Primary circuit control
318809, H02P 700
Patent
active
055920624
ABSTRACT:
A controller for use with AC induction motors utilizes a microcontroller in conjunction with a triac to control the duty cycle of the AC power applied to the motor. A voltage sensing circuit provides signals to the microcontroller. The microcontroller is also coupled to the gate of a triac. The microcontroller automatically selects the appropriate parameters for most efficient motor operation based upon the motor power factor as determined by the time at which the voltage across the motor crosses zero and the voltage at the triac gate crosses zero.
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The Arizona Republic, Sunday, Aug. 8, 1993, "Motor Controllers Give Low-Cost Boost to Appliances" by James Dulley.
Lenkszus Donald J.
Wysocki Jonathan
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