Control device for three phase ac generator-motor
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United States of America Patent
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Issued Date -
Mar 30, 2006
app pub date -
Sep 28, 2004
filing date -
Sep 28, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A control device of a three-phase alternating current motor-generator, which works as an inverter circuit for driving the motor-generator as a motor by using a battery and also functions as a three-phase rectifier circuit for driving the motor-generator as a generator for producing output power for charging a battery. The control circuit uses MOS field-effect transistors as control elements for respective phases. When the motor-generator is driven as the three-phase ac generator, the control device uses means for conducting synchronous rectification by using MOSFETs only on the negative potential side for respective phases. This can simplify the rectifying operation, reduce the rectification loss and improve the battery charging efficiency.
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