MOTOR DEVICE AND VEHICLE-MOUNTED SEAT AIR CONDITIONER
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
Jan 23, 2020
app pub date -
Oct 4, 2018
filing date -
Oct 4, 2018
priority date (Note) -
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Abstract
A motor device includes: a motor body including a rotor, multi-phase coils for rotating the rotor, and an oil-retaining bearing supporting the rotor for rotation; and a drive control unit detecting a position of the rotor based on counter electromotive force of any of the multi-phase coils, and controlling energization of the multi-phase coils according to the position of the rotor, wherein the drive control unit feedback-controls energization of the multi-phase coils such that rotational speed of the rotor does not fall below a threshold value at which detection of rotational position of the rotor based on the counter electromotive force is impossible.
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