Fan motor control unit
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United States of America Patent
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Jan 23, 2018
Issued Date -
N/A
app pub date -
Jun 11, 2014
filing date -
Jun 14, 2013
priority date (Note) -
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Abstract
A fan motor control unit includes sensor units that each detect a rotational position of the fan motor, a switching unit that selectively connects each of stator coils of the fan motor to a rectifier circuit, a current sensor that detects a current flowing in the fan motor, and a switching control unit that advances, in the case where the current detected by the current sensor exceeds a threshold, a energization timing from the rectifier circuit to the stator coils with respect to the energization timing applied while the current detected by the current sensor is lower than the threshold, on the basis of the rotational position detected by the sensor units.
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