公开(公告)号：US10756607B2

公开(公告)日：2020-08-25

申请号：US16186472

申请日：2018-11-09

Applicant: DENSO CORPORATION

Inventor： Yoshiaki Takemoto ,  Masashi Matsuda ,  Yusuke Morimoto

IPC: H02K1/22 ,  H02K21/14 ,  H02K1/14 ,  H02K1/27

Abstract: A motor includes a rotor and a stator. The rotor includes a first rotor core including a plurality of first claw-like magnetic poles, a second rotor core including a plurality of second claw-like magnetic poles, and a magnetic field magnet arranged between the first and second rotor cores. The first and second claw-like magnetic poles are alternately arranged in a circumferential direction. The magnetic field magnet causes the first and second claw-like magnetic poles to function as magnetic poles different from each other. The stator includes a first stator core including a plurality of first claw-like magnetic poles, a second stator core including a plurality of second claw-like magnetic poles, and a coil section arranged between the first and second stator cores. The stator is configured to cause the first and second claw-like magnetic poles of the stator to function as magnetic poles different from each other and switch polarities of the magnetic poles on the basis of energization to the coil section. At least ones of the claw-like magnetic poles of the rotor and the claw-like magnetic poles of the stator are formed in a shape in which circumferential centers of distal end portions are shifted in the circumferential direction with respect to circumferential centers of proximal end portions.

公开(公告)号：US20190097510A1

公开(公告)日：2019-03-28

申请号：US16186472

申请日：2018-11-09

Applicant: DENSO CORPORATION

Inventor： Yoshiaki Takemoto ,  Masashi Matsuda ,  Yusuke Morimoto

IPC: H02K21/14 ,  H02K1/27 ,  H02K1/22 ,  H02K1/14

CPC classification number: H02K21/145 ,  H02K1/145 ,  H02K1/226 ,  H02K1/2706 ,  H02K1/2713 ,  H02K1/2733

Abstract: A motor includes a rotor and a stator. The rotor includes a first rotor core including a plurality of first claw-like magnetic poles, a second rotor core including a plurality of second claw-like magnetic poles, and a magnetic field magnet arranged between the first and second rotor cores. The first and second claw-like magnetic poles are alternately arranged in a circumferential direction. The magnetic field magnet causes the first and second claw-like magnetic poles to function as magnetic poles different from each other. The stator includes a first stator core including a plurality of first claw-like magnetic poles, a second stator core including a plurality of second claw-like magnetic poles, and a coil section arranged between the first and second stator cores. The stator is configured to cause the first and second claw-like magnetic poles of the stator to function as magnetic poles different from each other and switch polarities of the magnetic poles on the basis of energization to the coil section. At least ones of the claw-like magnetic poles of the rotor and the claw-like magnetic poles of the stator are formed in a shape in which circumferential centers of distal end portions are shifted in the circumferential direction with respect to circumferential centers of proximal end portions.

公开(公告)号：US11322996B2

公开(公告)日：2022-05-03

申请号：US16967379

申请日：2019-03-26

Applicant: DENSO CORPORATION

Inventor： Koji Mikami ,  Akihiro Utsumi ,  Yoshiaki Takemoto ,  Koji Hotta

IPC: H02K1/27 ,  H02K21/16 ,  H02K1/276 ,  H02K1/2746

Abstract: A motor includes a rotation shaft, a rotor, and a stator. The rotor includes a rotor core and magnetic pole portions respectively including permanent magnets embedded in the rotor core. The magnetic pole portions have polarities that differ alternately in a circumferential direction. A projection projecting radially outward from an outer circumferential portion of the rotor core is arranged between the magnetic pole portions having different polarities. In a radial opposing relationship of the rotor core and the teeth taken at different times while the rotor is revolved once, at a certain time, a quantity of the teeth that oppose one of the magnetic pole portions and do not oppose the projection is greater than a quantity of the teeth that simultaneously oppose two of the magnetic pole portions adjacent to each other in the circumferential direction and the projection located in between the magnetic pole portions.

公开(公告)号：US12073993B2

公开(公告)日：2024-08-27

申请号：US17667777

申请日：2022-02-09

Applicant: DENSO CORPORATION

Inventor： Tomonori Fujinaka ,  Yoshiaki Takemoto

IPC: H01F7/02 ,  H01F41/02

CPC classification number: H01F7/021 ,  H01F41/0266 ,  H01F41/0273

Abstract: A bond magnet includes filaments bonded with each other to form a shape of the bond magnet. Each of the filaments is a filamentous member including a resin material and magnetic powder dispersed in the resin material, and has magnetic anisotropy for high degree of freedom of magnetic flux direction and high surface magnetic flux density on a working surface.