Method for controlling a direct current brushless motor, and control circuit
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United States of America Patent
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Sep 25, 2012
Grant Date -
Jul 2, 2009
app pub date -
Sep 10, 2008
filing date -
Dec 28, 2007
priority date (Note) -
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Abstract
A method for controlling a direct current (DC) brushless motor, and a control circuit thereof are provided. The DC brushless motor is sensorless. In response to a digital output signal that is applied to drive the direct current brushless motor, detection of a back electromotive force (BEMF) is ceased in a predetermined time interval, so as to avoid detecting erroneous BEMF and keep normal operation of the direct current brushless motor.
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