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    • 9. 发明申请
    • PERMANENT MAGNET ROTARY MOTOR
    • 永磁电机
    • US20070063610A1
    • 2007-03-22
    • US11532932
    • 2006-09-19
    • Toshihito Miyashita
    • Toshihito Miyashita
    • H02K1/00H02K1/28
    • H02K1/148H02K21/022H02K29/03
    • The present invention provides a permanent magnet rotary motor in which cogging torque can be reduced without largely reducing the torque. When an angle formed between two virtual lines respectively connecting a center of a rotary shaft and both ends of a first type connecting portion 21A is defined as a first angle θ1 and an angle formed between two virtual lines connecting the center of the rotary shaft and both ends of a second type connecting portion 21B is defined as a second angle θ2, the relationship between the first angle θ1 and the second angle θ2 is θ1>θ2. A through-hole H1 is formed in the first type connecting portion 21A, which extends from a center position of the first type connecting portion 21A as viewed in an axial direction of the rotary shaft toward both sides in the axial direction. A through-hole H2 is formed in the second type connecting portion 21B, which extends from a center position of the second type connecting portion 21B as viewed in the axial direction toward both sides in the axial direction. The length, in a circumferential direction, of the through-hole H2 formed in the first type connecting portion 21A is longer than the length, in the circumferential direction, of the through-hole H2 formed in the second type connecting portion 21B. The length, in the axial direction, of the through-hole H1 formed in the first type connecting portion 21A is shorter than a length, in the axial direction, of the through-hole H2 formed in the second type connecting portion 21B.
    • 本发明提供一种能够在不大幅度减小转矩的情况下减小齿槽转矩的永久磁铁旋转电动机。 当将分别连接旋转轴的中心和第一类型连接部分21A的两端的虚拟虚线之间形成的角度定义为第一角度θ1,以及在连接旋转轴的中心的两条假想线之间形成的角度 并且第二类型连接部分21B的两端被定义为第二角度θ2,第一角度θ1和第二角度θ2之间的关系是θ1>θ2。 在第一型连接部分21A中形成一个通孔H 1,该第一型连接部分21A从旋转轴的轴向方向从第一型连接部分21A的中心位置向轴向两侧延伸。 在第二型连接部分21B中形成有一个通孔H 2,该第​​二类型连接部分21B沿轴向方向从第二类型连接部分21B的轴向方向两侧延伸。 形成在第一类型连接部分21A中的通孔H 2在圆周方向上的长度比在第二类型连接部分21中形成的通孔H 2的圆周方向长 在第一型连接部分21A中形成的通孔H 1沿轴向方向的长度比形成在第二类型连接部分21A中的通孔H1的沿轴向方向的长度短 21 B.