| 摘要 |
PROBLEM TO BE SOLVED: To provide a permanent magnet motor of which the rotational position detection element is hardly affected by an external force, for which the mounting work is easy and the process fault is minimized. SOLUTION: The permanent magnet motor is constituted of permanent magnets 22 which are disposed on an outer peripheral surface of a rotor 21 disposing an N-pole and a S-pole alternately having the pole number 20 poles or more and disposing the poles respectively electrical angle 120 degrees or 60 degrees, a printed board 49 which keeps a predetermined air gap against the part of the outer peripheral surface of the 22 positioning its center on a predetermined concentric circle of the rotor 20 and fixing to a stator 30 at a position offsetting both end portions except the center from the concentric circle, a plurality of rotational position detection elements 41A which detects the rotational position of the 22 which are located on the 49 and face-arranged with an end of the axial direction of the 22 and disposed on a straight line, and a control circuit 42 which determines an order of phases of a stator winding 32 to be energized by the rotational position detection signal which is detected by the 41A inputted through a signal line.
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