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公开(公告)号：US09893576B2
公开(公告)日：2018-02-13
申请号：US15294415
申请日：2016-10-14
Applicant: ASMO CO., LTD.
Inventor： Koji Mikami , Yoji Yamada
IPC: H02K21/14 , H02K1/27 , H02K21/12 , H02K3/28 , H02K1/14 , H02K1/24 , H02K16/02 , H02K3/18 , H02K7/08
CPC classification number: H02K1/2706 , H02K1/14 , H02K1/24 , H02K1/2713 , H02K1/2746 , H02K3/18 , H02K3/28 , H02K7/083 , H02K16/02 , H02K21/12 , H02K21/14
Abstract: A brushless motor includes a first rotor core, a second rotor core, and a field magnet member. The first rotor core includes primary projecting pieces arranged along a circumferential direction at equal intervals. The second rotor core has the same shape as the first rotor core, and includes secondary projecting pieces arranged along the circumferential direction at equal intervals. The secondary projecting pieces are positioned between the primary projecting pieces that are adjacent to one another in the circumferential direction. The field magnet member is arranged between the first rotor core and the second rotor core. The field magnet member is magnetized along an axial direction to generate primary magnetic poles in the primary projecting pieces, and generate secondary magnetic poles in the secondary projecting pieces. A rotor includes the first rotor core, the second rotor core, and the field magnet member.
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公开(公告)号：US09800102B2
公开(公告)日：2017-10-24
申请号：US14195295
申请日：2014-03-03
Applicant: ASMO CO., LTD.
Inventor： Koji Mikami
CPC classification number: H02K1/243 , H02K1/226 , H02K1/2726 , H02K5/04 , H02K2213/03
Abstract: A motor includes a stator, a rotor and a case. The rotor includes a first rotor core, a second rotor core, and a field magnet. Each of the first rotor core and the second rotor core includes a core base and a plurality of claw poles. The field magnet is located between the core bases. The case includes a cylindrical yoke housing and a lid. To balance magnetic flux from the first rotor core with magnetic flux from the second rotor core, the distance between the rotor and the stator is varied from the distance between the rotor and the yoke housing or the teeth of the stator are shaped to enable magnetic saturation.
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公开(公告)号：US20180013327A1
公开(公告)日：2018-01-11
申请号：US15713253
申请日：2017-09-22
Applicant: ASMO CO., Ltd.
Inventor： Yoji Yamada , Koji Mikami , Akihiro Utsumi , Akihisa Hattori , Chie Morita , Seiya Yokoyama
CPC classification number: H02K1/2706 , H02K1/2713 , H02K1/2766 , H02K21/16
Abstract: A rotor of a motor includes first and second rotor cores, a field magnet, and a commutator magnet. The first and second rotor cores each include a core base and a plurality of claw poles. The claw poles of the first rotor core and the claw poles of the second rotor core are alternately arranged in a circumferential direction. The field magnet is located between the core bases. The field magnet is magnetized in an axial direction so that the claw poles of the first rotor core and the claw poles of the second rotor core function as different magnetic poles in the circumferential direction. The commutator magnet is located on an outer circumference of the field magnet around the claw poles. The commutator magnet is magnetized so that surfaces having the same polarity face each other between the claw poles and the commutator magnet.
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公开(公告)号：US20170279319A1
公开(公告)日：2017-09-28
申请号：US15620578
申请日：2017-06-12
Applicant: ASMO CO., LTD.
Inventor： Yoji Yamada , Koji Mikami , Takahiro Tsuchiya , Hironari Suzuki , Seiya Yokoyama
CPC classification number: H02K1/243 , H02K1/2713 , H02K1/2746 , H02K19/103 , H02K21/16
Abstract: A motor includes a stator, a rotor, a case, and back-surface magnet portions. The rotor has a first rotor core, a second rotor core and a field magnet. Each of the first and second rotor cores has a core base and claw-shaped magnetic poles. The field magnet is sandwiched between the first rotor core and the second rotor core and causes the claw-shaped magnetic poles of the first rotor core and the second rotor core to function as different magnetic poles. The back-surface magnet portions include a second and a first back-surface magnet portions respectively provided on the back surfaces of the claw-shaped magnetic poles of the second rotor core and the first rotor core. Size of the second back-surface magnet portion differs from size of the first back-surface magnet portion are different from each other.
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公开(公告)号：US09379582B2
公开(公告)日：2016-06-28
申请号：US13953549
申请日：2013-07-29
Applicant: ASMO CO., LTD.
Inventor： Koji Mikami , Yoji Yamada , Shigemasa Kato
CPC classification number: H02K1/2713 , H02K1/2706 , H02K1/2766 , H02K15/03 , H02K29/03
Abstract: A motor includes a shaft, a rotor, and a stator. The rotor includes first and second rotor cores, and a field magnet. Second claw magnetic pole portions of second rotor core are arranged between first claw magnetic pole portions of the first rotor core. The field magnet causes the first claw magnetic pole portions to function as first magnetic poles, and the second claw magnetic pole portions to function as second magnetic poles. Radially inner surfaces of the teeth of a stator core face radially outer surfaces of the first and second claw magnetic poles. Either radially outer surfaces of the first and second claw magnetic pole portions or radially inner surfaces of the teeth each have a cross-sectional shape in a direction orthogonal to the axial direction that is not concentric to a circle of which center is an axis of the rotation shaft.
Abstract translation: 电动机包括轴，转子和定子。 转子包括第一和第二转子芯和场磁体。 第二转子铁心的第二爪磁极部配置在第一转子铁芯的第一爪极极部之间。 场磁铁使第一爪磁极部作为第一磁极，第二爪磁极部作为第二磁极发挥作用。 定子芯的齿的径向内表面面向第一和第二爪磁极的径向外表面。 第一爪极磁极部分和第二爪状磁极部分的径向外表面或齿的径向内表面各自在与轴向正交的方向上具有横截面形状，该轴向方向的中心不是同心圆 旋转轴。
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Patent Agency Ranking
公开(公告)号：US20150084466A1
公开(公告)日：2015-03-26
申请号：US14495492
申请日：2014-09-24
Applicant: ASMO CO., LTD.
Inventor： Takahiro Tsuchiya , Chie Morita , Yoji Yamada , Koji Mikami
IPC: H02K1/24
CPC classification number: H02K1/243 , H02K1/2713 , H02K1/2733 , H02K21/044 , H02K21/16
Abstract: A rotor includes first and second rotor cores, a disk magnet, and a rectifying magnet. The first and second rotor cores each include a core base and claw-poles. The disk magnet is magnetized in the axial direction so that the claw-poles of the first rotor core function as first poles and the claw-poles of the second rotor core function as second poles. The rectifying magnet includes at least an inter-pole magnet portion or a back-surface magnet portion. The inter-pole magnet portion is located in a gap formed in the circumferential direction between the claw-poles of the first rotor core and the claw-poles of the second rotor core. The back surface magnet portion is located in a gap formed at back surfaces of the claw-poles. The rectifying magnet and the disk magnet are formed from different materials. The rectifying magnet is integrated with the disk magnet in a post-process.
Abstract translation: 转子包括第一和第二转子芯，磁盘磁体和整流磁体。 第一和第二转子芯每个包括芯基部和爪极。 磁盘磁体沿轴向磁化，使得第一转子芯的爪极用作第一极，第二转子芯的爪极用作第二极。 整流磁铁至少包括极间磁铁部分或背面磁铁部分。 极间磁铁部分位于第一转子铁心的爪极与第二转子铁心的爪极之间沿圆周方向形成的间隙。 背面磁铁部位于形成在爪极的背面的间隙。 整流磁铁和磁盘磁体由不同的材料形成。 在后期处理中，整流磁体与磁盘磁体一体化。
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公开(公告)号：US09859761B2
公开(公告)日：2018-01-02
申请号：US14158273
申请日：2014-01-17
Applicant: ASMO CO., LTD.
Inventor： Yoji Yamada , Chie Morita , Seiya Yokoyama , Koji Mikami , Takahiro Tsuchiya
CPC classification number: H02K1/2713 , H02K1/226 , H02K1/243 , H02K1/2706 , H02K1/2733 , H02K1/274 , H02K1/2753 , H02K1/276 , H02K1/2773
Abstract: A rotor includes a first rotor core, a second rotor core, a permanent magnet and a resin layer. The first rotor core includes a first core base and first claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the first core base. The second rotor core includes a second core base and second claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the second core base. The first rotor core and the second rotor core are combined with each other so that the first and second core bases are opposed to each other and the first and second claw-shaped magnetic poles are alternately arranged in the circumferential direction of the rotor. The permanent magnet includes at least a main field magnet. The main field magnet is located between the first and second core bases in the axial direction, and is magnetized in the axial direction. The main field magnet causes the first claw-shaped magnetic poles to function as first magnetic poles, and causes the second claw-shaped magnetic poles to function as second magnetic poles. The resin layer covers at least a portion of a surface of the permanent magnet.
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公开(公告)号：US10734852B2
公开(公告)日：2020-08-04
申请号：US15709062
申请日：2017-09-19
Applicant: ASMO CO., LTD.
Inventor： Koji Mikami , Shigemasa Kato , Yoji Yamada , Seiya Yokoyama
Abstract: A motor includes a stator, a rotor and a case. The rotor includes a first rotor core, a second rotor core, and a field magnet. Each of the first rotor core and the second rotor core includes a core base and a plurality of claw poles. The field magnet is located between the core bases. The case includes a cylindrical yoke housing and a lid. To balance magnetic flux from the first rotor core with magnetic flux from the second rotor core, the distance between the rotor and the stator is varied from the distance between the rotor and the yoke housing or the teeth of the stator are shaped to enable magnetic saturation.
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公开(公告)号：US10326324B2
公开(公告)日：2019-06-18
申请号：US15822048
申请日：2017-11-24
Applicant: ASMO CO., LTD.
Inventor： Yoji Yamada , Koji Mikami
Abstract: A rotor includes a first rotor core, a second rotor core, a permanent magnet and a resin layer. The first rotor core includes a first core base and first claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the first core base. The second rotor core includes a second core base and second claw-shaped magnetic poles arranged at equal intervals on a peripheral portion of the second core base. The first rotor core and the second rotor core are combined with each other so that the first and second core bases are opposed to each other and the first and second claw-shaped magnetic poles are alternately arranged in the circumferential direction of the rotor. The permanent magnet includes at least a main field magnet. The main field magnet is located between the first and second core bases in the axial direction, and is magnetized in the axial direction. The main field magnet causes the first claw-shaped magnetic poles to function as first magnetic poles, and causes the second claw-shaped magnetic poles to function as second magnetic poles. The resin layer covers at least a portion of a surface of the permanent magnet.
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公开(公告)号：US20160197527A1
公开(公告)日：2016-07-07
申请号：US14975394
申请日：2015-12-18
Applicant: ASMO CO., LTD.
Inventor： Yoji Yamada , Koji Mikami , Akihiro Utsumi , Akihisa Hattori , Chie Morita , Seiya Yokoyama
CPC classification number: H02K1/2706 , H02K1/2713 , H02K1/2766 , H02K21/16
Abstract: A rotor of a motor includes first and second rotor cores, a field magnet, and a commutator magnet. The first and second rotor cores each include a core base and a plurality of claw poles. The claw poles of the first rotor core and the claw poles of the second rotor core are alternately arranged in a circumferential direction. The field magnet is located between the core bases. The field magnet is magnetized in an axial direction so that the claw poles of the first rotor core and the claw poles of the second rotor core function as different magnetic poles in the circumferential direction. The commutator magnet is located on an outer circumference of the field magnet around the claw poles. The commutator magnet is magnetized so that surfaces having the same polarity face each other between the claw poles and the commutator magnet.
Abstract translation: 电动机的转子包括第一和第二转子芯，场磁体和换向器磁体。 第一和第二转子芯分别包括芯基部和多个爪极。 第一转子铁心的爪极和第二转子铁芯的爪极在圆周方向交替地配置。 场磁体位于核心基座之间。 场磁体沿轴向磁化，使得第一转子铁心的爪极和第二转子铁芯的爪极在周向上起到不同的磁极的作用。 换向器磁体位于磁极周围的爪极周围。 换向器磁体被磁化，使得具有相同极性的表面在爪极和换向器磁体之间彼此面对。
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