Fujitsu General Limited

Wijittra Jabtanom

Masanori Murakami

Pairoj Patisonticharoen

Chanaporn Thanathitipong

Chanaporn Thanathihipong

There is provided a permanent magnet motor capable of reducing cogging torque and torque ripple while suppressing a decrease in motor output. In a permanent magnet motorincluding a rotorin which a plurality of permanent magnetsare arranged in a ring shape as a magnetic field unit, the transverse cross section of the permanent magnethas an inside peripheryformed by a first archaving the center of curvature Oand the radius of curvature R, and an outside peripheryformed by a second archaving the center of curvature Oand the radius of curvature R, a third archaving the center of curvature Oand the radius of curvature Rand joined to one end of the second arc, and a fourth archaving the center of curvature Oand the radius of curvature Rand joined to the other end of the second arc. The above-described centers of curvature are disposed at different positions.

Permanent magnet motor

There is provided an electronic motor in which a stator core is thinned to obtain an increased diameter of a rotor is to produce a high power output, and a stator can be positioned with high accuracy at the time when a coil is wound on the stator. The outside peripheral surface of a yoke partis substantially the same as the outside peripheral surface of a flangeof an insulator, and in a part of the flange, a cut-away partis provided to expose a part of the end face of a stator core

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Kawasaki, Japan

Wijittra Jabtanom