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公开(公告)号：EP0265868A3
公开(公告)日：1989-08-09
申请号：EP87115576.8
申请日：1987-10-23
申请人： HITACHI, LTD.
IPC分类号： H02K17/16
CPC分类号： H02K17/16
摘要： A rotor of an induction motor comprising a rotary shaft (6), a cylindrical rotor core (7) fixedly secured on the rotary shaft, a conductive cover (8) fixed on the outer circumferential surface of the rotor core, the conductive cover being formed of a composite material of magnetic material (12) and electrically highly conductive material (13) to have a circumferential permeability smaller than a radial permeability, and a magnetic skin (9) made of a magnetic material and provided on the outer circumferential surface of the conductive cover (8), the magnetic skin having a circumferential permeability (µʹ ϑ ) and an electrical conductivity (ρʹ) which are set to be larger than the circumferential permeability (µ ϑ ) and an electrical resistivity (ρ) of the conductive cover, respectively, whereby a loss due to a spatial higher harmonics magnetic flux of higher order generated by a pulsating magnetic flux (φ S ) at slots in a stator (1) of induction motor can be prevented.
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公开(公告)号：EP0265868A2
公开(公告)日：1988-05-04
申请号：EP87115576.8
申请日：1987-10-23
申请人： HITACHI, LTD.
IPC分类号： H02K17/16
CPC分类号： H02K17/16
摘要： A rotor of an induction motor comprising a rotary shaft (6), a cylindrical rotor core (7) fixedly secured on the rotary shaft, a conductive cover (8) fixed on the outer circumferential surface of the rotor core, the conductive cover being formed of a composite material of magnetic material (12) and electrically highly conductive material (13) to have a circumferential permeability smaller than a radial permeability, and a magnetic skin (9) made of a magnetic material and provided on the outer circumferential surface of the conductive cover (8), the magnetic skin having a circumferential permeability (µʹ ϑ ) and an electrical conductivity (ρʹ) which are set to be larger than the circumferential permeability (µ ϑ ) and an electrical resistivity (ρ) of the conductive cover, respectively, whereby a loss due to a spatial higher harmonics magnetic flux of higher order generated by a pulsating magnetic flux (φ S ) at slots in a stator (1) of induction motor can be prevented.
摘要翻译： 一种感应电动机的转子，包括旋转轴（6），固定在旋转轴上的圆柱形转子芯（7），固定在转子芯的外圆周表面上的导电盖（8），形成导电盖 磁性材料（12）和电导体材料（13）的复合材料具有小于径向磁导率的圆周磁导率和由磁性材料制成的磁性表皮（9），并设置在磁性材料的外周表面上 导电盖（8），具有周向磁导率（μθ）和电导率（rho'）的磁性表皮被设置为大于圆周磁导率（μO）和导电性的电阻率（rho） 从而可以预测由感应电动机的定子（1）中的槽处的脉动磁通（phi S）产生的高阶空间高次谐波磁通的损耗 nted。
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公开(公告)号：EP1879281A3
公开(公告)日：2010-04-07
申请号：EP07013385.5
申请日：2007-07-09
申请人： Hitachi, Ltd.
CPC分类号： H02K15/024 , H02K1/06 , H02K1/16 , H02K1/276
摘要： A rotating electrical machine (10) comprises a stator (40) and a rotor (60); the stator (40) comprising a stator core (42) having teeth (52) and slots (50), and stator windings (44) disposed in the slots (50), wherein the stator core (42) is made of laminated steel sheets, teeth (52) and slots (50) of the steel sheet are made by etching, and the thickness of the steel sheet is between 0.05 mm and 0.30 mm. Specifically, it is preferable that the steel sheet used herein be a silicon steel sheet containing crystalline particles.
The rotating electrical machine can reduce iron loss.-
公开(公告)号：EP2053721A2
公开(公告)日：2009-04-29
申请号：EP08014860.4
申请日：2008-08-21
申请人： Hitachi Ltd.
IPC分类号： H02K1/14
摘要： A rotating electrical machine includes: a stator that includes two stator stages each constituted with a plurality of claw poles extending toward opposite sides along an axial direction at alternate positions and a ring-shaped core back that forms a magnetic path between the claw poles, the two stator stages being stacked over along the axial direction; a stator winding formed by winding a coil in a ring shape and disposed in a space enclosed by the claw poles and the core back at each of the stator stages; and a rotor rotatably disposed at a position facing the claw poles of the stator, and: stator windings corresponding to a plurality of phases are disposed together at least at one of the two stator stages.
摘要翻译： 旋转电机包括：定子，其包括两个定子级，每个定子级由多个爪极组成，所述多个爪极在交替位置处沿着轴向方向相对侧延伸;以及环形芯背，其在爪极之间形成磁路， 两个定子台沿着轴向堆叠在一起; 定子绕组，其通过将线圈卷绕成环形并且设置在每个定子级上由爪极和芯背包围的空间中; 以及可转动地设置在与所述定子的爪极相对的位置的转子，以及与至少所述两个定子级中的至少一个相对应地设置在多个相位上的定子绕组。
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公开(公告)号：EP1722457A2
公开(公告)日：2006-11-15
申请号：EP06009547.8
申请日：2006-05-09
发明人： Enomoto, Yuji , Ito, Motoya , Masaki, Ryousou , Ohara, Koichiro , Mita, Masahiro , Komuro, Matahiro , Masuzawa, Masahiro
摘要： It is desired to design a coreless motor in which a gap size is set to be as small as possible, and a magnet having a large energy product is used in order to increase the gap magnetic flux density since the coreless motor has no iron core so that the magnetic flux density is small in the gap part. A rotor core of the motor has a permanent magnet rotor which is formed by a compression molding means (11), and which is formed of a compact formed by molding a powder material, the compact (2a) comprising a bond magnetic portion mainly composed of a binder (9) and a magnetic powder (8), and a soft magnetic portion mainly composed of a binder and a soft magnetic powder, the bond magnetic portion having magnetic poles having at least one surface which is mechanically bonded to the soft magnetic portion, in order to solve the inherent problems.
摘要翻译： 希望设计其中间隙尺寸设置为尽可能小的无芯电动机，并且使用具有大能量乘积的磁体，以便增加无芯电动机无铁芯的间隙磁通密度 磁隙密度在间隙部分较小。 电动机的转子铁心具有由压缩成形装置（11）形成的永久磁铁转子，该永久磁铁转子由通过模制粉末材料形成的压块形成，该压块（2a）包括主要由 粘合剂（9）和磁性粉末（8），以及主要由粘合剂和软磁性粉末组成的软磁性部分，所述粘合磁性部分具有至少一个表面，所述表面机械地结合到软磁性部分 ，以解决固有的问题。
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公开(公告)号：EP0265868B1
公开(公告)日：1994-01-12
申请号：EP87115576.8
申请日：1987-10-23
申请人： HITACHI, LTD.
IPC分类号： H02K17/16
CPC分类号： H02K17/16
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