MOTOR
PROBLEM TO BE SOLVED: To reduce torque ripple of a motor.SOLUTION: A flange part 30 that is expanded towards neighboring teeth at tips of teeth 24 of a stator is formed from a magnetostrictive material. Between the mutually opposing flange parts 30 of the neighboring teeth, a bridging member 36 of a...
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| Sprache: | eng ; jpn |
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To reduce torque ripple of a motor.SOLUTION: A flange part 30 that is expanded towards neighboring teeth at tips of teeth 24 of a stator is formed from a magnetostrictive material. Between the mutually opposing flange parts 30 of the neighboring teeth, a bridging member 36 of a nonmagnetic material is disposed. When a magnetic flux passes the flange part 30, the flange part 30 extends in a circumferential direction. Since the flange part 30 is restricted in the circumferential direction by trunks 28 of the teeth and the bridging member 36, a compression stress acts on tip portions of the teeth 24 and increase of a magnetic flux density in the portions is suppressed. A peak of a magnetic force is reduced and torque ripple is decreased.SELECTED DRAWING: Figure 2
【課題】電動機のトルクリップルを低減する。【解決手段】固定子のティース２４先端の隣接ティースに向けて張り出すつば部３０を磁歪材料で構成する。また、隣接するティースの互いに対向するつば部３０の間に、非磁性材料の橋渡し部材３６を配置する。つば部３０を磁束が通ると、つば部３０が周方向に伸びる。つば部３０は、ティースの幹部２８と橋渡し部材３６により周方向に拘束されているため、ティース２４の先端部分に圧縮応力が作用し、その部分の磁束密度の増加が抑制される。磁力のピークが低下して、トルクリップルが減少する。【選択図】図２ |
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