公开(公告)号：US20170194839A1

公开(公告)日：2017-07-06

申请号：US15397112

申请日：2017-01-03

Applicant: Johnson Electric S.A.

Inventor： James Ching Sik LAU ,  Bei Bei HE ,  Hong Jiang ZHAO ,  Ying Song YE

IPC: H02K9/06 ,  H02K1/27 ,  H02K1/12 ,  H02K5/20

CPC classification number: H02K9/06 ,  F04D25/0606 ,  F04D25/064 ,  F04D25/0646 ,  H02K1/12 ,  H02K1/27 ,  H02K1/2706 ,  H02K1/278 ,  H02K1/2786 ,  H02K5/20 ,  H02K7/14 ,  H02K16/02

Abstract: A motor and an airflow generating device using the motor are provided. A stator of the motor includes a barrel-shaped core with a stator winding wound therearound. A rotor of the motor includes outer and inner barrels, first permanent magnets mounted to the outer barrel, and second permanent magnets mounted to the inner barrel. The barrel-shaped core is located between the first and second permanent magnets. At least one of the outer and inner barrels includes first and second barrel sections that are separately formed, and the first and second barrel sections are stacked and fixed together along an axial direction of the motor. The connecting portion is integrally formed with at least a portion of the outer barrel and at least a portion of the inner barrel. This invention facilitates fabrication of the motor.

公开(公告)号：US20150349595A1

公开(公告)日：2015-12-03

申请号：US14725474

申请日：2015-05-29

Applicant: Johnson Electric S.A.

Inventor： Mao Xiong JIANG ,  Jian ZHAO ,  Guo Wei SUN ,  Yong LI ,  Yong WANG ,  Hong Jiang ZHAO ,  Yue LI

IPC: H02K1/27 ,  H02K5/20 ,  H02K3/32

CPC classification number: H02K1/2786 ,  H02K1/146 ,  H02K1/20 ,  H02K3/325 ,  H02K5/20 ,  H02K21/222 ,  H02K2213/03

Abstract: A permanent magnet motor has a number of permanent magnets forming permanent magnet poles. Each magnet has an outer surface that is an arc surface with a convex middle. An inner surface of the magnet is a curved surface with a concave middle. The curved surface has an arc surface section and two planar surface sections. The arc surface has a pole arc angle α of 0.7 to 0.96, and the ratio of an arc angle β of the arc surface section to the pole arc angle α is 0.15 to 0.35. The shape of the inner surface of the magnet creates uneven air gaps between the rotor poles and the stator core poles. This reduces cogging torque, increases the motor efficiency, and reduces the motor noise.

Abstract translation: 永磁电动机具有多个形成永磁体的永久磁铁。 每个磁体具有外表面，该外表面是具有凸中间的弧形表面。 磁体的内表面是具有凹面中间的曲面。 弯曲表面具有弧形表面部分和两个平面表面部分。 弧面的极弧角α为0.7〜0.96，弧角＆bgr; 的弧面角度与极弧角α成为0.15〜0.35。 磁体内表面的形状在转子极和定子铁芯极之间产生不均匀的气隙。 这样可以减少齿槽转矩，提高电机效率，并降低电机噪音。

公开(公告)号：US20150349593A1

公开(公告)日：2015-12-03

申请号：US14725525

申请日：2015-05-29

Applicant: Johnson Electric S.A.

Inventor： Mao Xiong JIANG ,  Jian ZHAO ,  Guo Wei SUN ,  Yong LI ,  Yong WANG ,  Hong Jiang ZHAO ,  Yue LI

IPC: H02K1/18 ,  H02K5/20 ,  H02K3/34

CPC classification number: H02K1/187 ,  H02K1/146 ,  H02K1/2786 ,  H02K3/345 ,  H02K5/20 ,  H02K5/225 ,  H02K21/22 ,  H02K2213/03

Abstract: An electric motor has a wound stator and an outer rotor. A core of the stator has outer and inner annular portions. Tooth portions extend radially outwardly from the outer annular portion. Connecting arms interconnect the outer and inner annular portions. The width of the connecting arms is less than the width of the tooth portions. The ratio of tooth height L1 to distance between the roots of adjacent teeth L3 is in the range of 1.0 and 1.3. The ratio of tooth width T3 to L3 is in the range of 0.8 and 1.0. The ratio of tooth length T1 to L3 is in the range of 0.5 and 0.6. The ratio of T3 to outer diameter of the stator core D is in the range of 0.07 and 0.1.

Abstract translation: 电动机具有缠绕定子和外转子。 定子的铁芯具有外环形部分和内环形部分。 齿部从外环形部分径向向外延伸。 连接臂互连外环和内环。 连接臂的宽度小于齿部的宽度。 齿高L1与相邻齿L3的根部之间的距离的比例在1.0和1.3的范围内。 齿宽T3与L3的比值在0.8和1.0的范围内。 齿长T1与L3的比例在0.5和0.6的范围内。 定子铁芯D的T3与外径的比例在0.07和0.1的范围内。