| 摘要 |
PROBLEM TO BE SOLVED: To provide an anisotropic segmental magnet which is capable of alleviating cogging phenomenon, without reducing motor torque. SOLUTION: A bipolar cylindrical magnet is provided with the inner surface of its cylinder serving as a working surface and the outer surface and two edge faces of the cylinder serving as non-acting surfaces. The axis of easy magnetization of magnetic powder on the cross section of the magnet in the direction vertical to its length direction increases gradually in the opposite pole directional component, while decreasing in the radial component as they approach a middle point between two poles from the center of reference magnetic pole in the circumferential direction, conforms to the circumferential direction in the middle point between the poles, then gradually increases again in the opposite pole directional component beyond the middle point between the two poles, and re-conforms to the radial direction at the center of the opposite pole.
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