Variable Frequency AC Motor Controller Using MCT's
Small Business Information
Iap Research, Inc.
2763 Culver Avenue, Dayton, OH, 45429
L. John Adams
AbstractA power controller is described which has increased power capability (50-100 Hp range), improved efficiency, reduced cost, and increased control capability for control of onboard auxillary power sources. A full four-quadrant control inverter uses a variable frequency, quasi-resonant four-quadrant H-bridge configuration and a phase shifted PWM controller for control of a three phase AC induction motor. Use of second generation P-MCT's improves inverter efficiency. Phase controlling the motor as a two-speed transmission. A custom hybrid microprocessor based system controller gives the desired control capability in a small, low cost, low weight, package suitable for volume production. ANTICIPATED BENEFITS: The single stage inverter concept offers a performance advantage (low loss, reduced parts count) and has wide application in motor control for electric vehicles, tanks, all electric aircraft and multifunctional switching in Navy and Marine power systems.
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