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    • 8. 发明申请
    • Electric motor
    • 电动马达
    • US20050275301A1
    • 2005-12-15
    • US11153713
    • 2005-06-15
    • Kazumitsu MoriyaMasayuki KuwanoToshio YamamotoYoshiki NakanoYasuhide Ito
    • Kazumitsu MoriyaMasayuki KuwanoToshio YamamotoYoshiki NakanoYasuhide Ito
    • H02K1/17H02K21/12H02K23/04H02K37/00
    • H02K23/04
    • An electric motor includes a cylindrical yoke main body and a plurality of permanent magnets having an arcuate cross-section. The permanent magnets are secured to a inner circumferential surface of the yoke main body such that the permanent magnets are continuous with one another along the entire circumference of the yoke main body, thereby forming a ring. An even number of magnetic poles are formed in the permanent magnets at predetermined angular intervals along the circumferential direction of the yoke main body. A pair of the magnetic poles that are adjacent to each other in the circumferential direction of the yoke main body have different magnetic polarities from each other. At least one of the permanent magnets is provided with a section where the magnetic polarity changes in the circumferential direction of the yoke main body. This suppresses vibration excited in a stator that causes vibration and noise.
    • 电动机包括圆柱形磁轭主体和具有弓形横截面的多个永磁体。 永磁体被固定在轭主体的内周面上,使得永久磁铁沿着轭主体的整个圆周彼此连续,从而形成环。 在磁轭主体的圆周方向上以规定的角度间隔在永久磁铁上形成有数个磁极。 在磁轭主体的圆周方向上彼此相邻的一对磁极具有彼此不同的磁极性。 永磁体中的至少一个设置有磁轭在轭主体的圆周方向上变化的部分。 这抑制了引起振动和噪声的定子中激发的振动。