公开(公告)号：US5510664A

公开(公告)日：1996-04-23

申请号：US116959

申请日：1993-09-07

申请人： Mitsuo Suzuki ,  Yukio Itami ,  Yoshio Hashimoto ,  Mutsumi Yamamoto ,  Yoshihiro Takahashi

发明人： Mitsuo Suzuki ,  Yukio Itami ,  Yoshio Hashimoto ,  Mutsumi Yamamoto ,  Yoshihiro Takahashi

IPC分类号： H02K3/04 ,  H02K1/27 ,  H02K5/16 ,  H02K7/04 ,  H02K7/09 ,  H02K11/00 ,  H02K21/24 ,  H02K29/00 ,  H02K29/08 ,  H02K1/22

CPC分类号： H02K21/24 ,  H02K11/215 ,  H02K11/33 ,  H02K11/40 ,  H02K7/04 ,  H02K7/09 ,  H02K1/27 ,  H02K29/08 ,  H02K5/16 ,  Y10S310/06

摘要： In a brushless motor, the number of coreless armature coils is set to 3n when the number of magnetic poles of a magnet for a magnetic field is set to 2n where n is a positive integer. An opening angle of each of the armature coils is set to 360/3n degrees. A notch portion is formed in an outer circumferential portion of the magnet for a magnetic field. A recessed portion is formed by this notch portion and an inner circumferential portion of a yoke. The recessed portion constitutes a groove for correcting a balance of each of the magnet for a magnetic field and a rotating body when this magnet and the rotating body are rotated. A motor housing and a harness are electrically connected to a printed board. The housing is connected to the ground through this harness and a harness for power. In this brushless motor, a magnetizing frequency is reduced and driving efficiency of a control circuit can improved when the brushless motor is rotated at a high speed. Further, it is possible to prevent an iron or copper loss from being caused so that an increase in temperature of the brushless motor can be restrained.

摘要翻译： 在无刷电动机中，当磁场磁体的磁极数设定为2n，n为正整数时，无芯电枢线圈的数量设定为3n。 每个电枢线圈的开度角设定为360 / 3n度。 在用于磁场的磁体的外周部形成有切口部。 由该切口部和轭的内周部形成有凹部。 当该磁体和旋转体旋转时，凹部构成用于校正每个磁体磁体和旋转体的平衡的凹槽。 电动机壳体和线束电连接到印刷电路板。 外壳通过该线束和用于电源的线束连接到地面。 在该无刷电动机中，当无刷电动机高速旋转时，磁化频率降低，控制电路的驱动效率提高。 此外，可以防止引起铁或铜损失，从而可以抑制无刷电动机的温度升高。