Brushless motor having a field magnet, a portion of which is used for detecting the rotor's position
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United States of America Patent
Stats
-
Apr 28, 1998
Grant Date -
N/A
app pub date -
Oct 21, 1996
filing date -
Oct 26, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brushless motor is provided. The brushless motor of the present invention includes a shaft, a rotor, having a plurality of field magnets attached thereto, fixed to the shaft, a stator for forming a magnetic field to enable rotation of the rotor, a housing in which the rotor and stator are installed, and a motor driving unit, wherein the arc length of a portion of the field magnet used for detecting the position of the rotor and that of the remaining portion thereof are formed to be different from each other. According to the brushless motor of the present invention, it is possible to increase efficiency of the brushless motor and to reduce manufacturing costs.
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