Brushless motor control circuit assembly for ceiling fan
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United States of America Patent
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-
Jul 7, 2009
Grant Date -
Dec 11, 2008
app pub date -
Jun 7, 2007
filing date -
Jun 7, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A power-saving, high-performance, low-noise brushless motor control circuit assembly is disclosed formed of a power supply circuit, a booster and compensation circuit, a voltage regulator circuit, a microprocessor, a back electromagnetic force sensor, three driver circuits, and three output circuits. By means of detecting back electromagnetic force, the magnetic pole position of the brushless motor is known accurately, ensuring accurate operation control. By means of providing a high voltage to drive the drive circuits, the field effect transistors of the output circuits are operated under full conduction, saving much power consumption and lowering the working temperature of the brushless motor.
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