JP2546636B
PURPOSE:To increase a torque by a method of displacing stepwise N- and S-poles at magnetizing time, thereby reducing a cogging force. CONSTITUTION:When the least common multiple of the number of salient poles of an armature and the number of poles of magnets is represented by n, a magnetism displace...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | PURPOSE:To increase a torque by a method of displacing stepwise N- and S-poles at magnetizing time, thereby reducing a cogging force. CONSTITUTION:When the least common multiple of the number of salient poles of an armature and the number of poles of magnets is represented by n, a magnetism displaced stepwisely at an angle of theta specified by theta=360 deg.(2Xn) is performed in a rotating direction, and the axial area of the displaced portion is set to be substantially equal. When this magnetization is achieved, a cogging force can be reduced, and a small motor which has stable rotation can be obtained. |
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