公开(公告)号：US20170279340A1

公开(公告)日：2017-09-28

申请号：US15460854

申请日：2017-03-16

Applicant: JTEKT CORPORATION

Inventor： Taiki TAKEUCHI ,  Hiroshi YOSHIKAWA ,  Naotake KANDA ,  Yoshiyuki SHIBATA ,  Koji TACHI

IPC: H02K15/03 ,  H01F13/00 ,  H02K1/27

CPC classification number: H02K15/03 ,  H01F13/003 ,  H02K1/272 ,  H02K1/276

Abstract: An orientation magnetization device includes plural orientation magnetization yokes and plural orientation magnetization magnets, and molds field magnets while a rotor core is disposed in a magnetic circuit that is formed by assembling the orientation magnetization yokes and the orientation magnetization magnets into an annular shape. When the rotor core is disposed in the magnetic circuit, protruding portions are disposed at portions of the respective orientation magnetization yokes facing the rotor core. Auxiliary magnets are disposed in gaps between the respective orientation magnetization magnets and the rotor core, on opposite sides of each protruding portion in a circumferential direction of the orientation magnetization device. Each protruding portion and each auxiliary magnet extend in an axial direction of the orientation magnetization device, and are skewed with respect to the axial direction of the orientation magnetization device.

公开(公告)号：US20170244293A1

公开(公告)日：2017-08-24

申请号：US15430832

申请日：2017-02-13

Applicant: JTEKT CORPORATION

Inventor： Naotake KANDA ,  Hiroshi YOSHIKAWA ,  Taiki TAKEUCHI ,  Yoshiyuki SHIBATA

IPC: H02K1/27 ,  H02K1/02

CPC classification number: H02K1/2793 ,  H02K1/02 ,  H02K21/24

Abstract: A rotor includes a core and permanent magnets. Each permanent magnet is embedded in the core. Each permanent magnet forming one of the magnetic poles of the rotor includes a first portion and a second portion. The first and second portions and extend inward in a radial direction Dr and also extend away from a stator-facing surface of the rotor 10 in an axial direction Da. Regions of the first and second portions and away from the stator-facing surface are connected to a bottom. An inner peripheral surface of the first portion, an inner peripheral surface of the second portion, and an inner peripheral surface of the bottom form one of the magnetic poles of the rotor.

公开(公告)号：US20180309351A1

公开(公告)日：2018-10-25

申请号：US15951513

申请日：2018-04-12

Applicant: JTEKT CORPORATION

Inventor： Koji TACHI ,  Hiroshi YOSHIKAWA ,  Naotake KANDA ,  Taiki TAKEUCHI ,  Shohei OGI

IPC: H02K15/03 ,  H02K15/12 ,  H02K1/27

Abstract: An injection molding device includes: a lower die that supports a rotor core; an intermediate die including a magnetizing mechanism; and an upper die including an injection die having a gate formed therein through which a molten bonded-magnet material supplied from a supply source is injected into a magnet insertion hole in the rotor core. The injection die has a cylindrical protruding portion at an end surface of which the gate is open. In the protruding portion, a magnetic-flux applying member containing ferromagnetic material is embedded with its side surface exposed at an outer peripheral surface of the protruding portion. The magnetizing mechanism is formed in an annular shape that can accommodate, inside its inner periphery, the rotor core and a distal end portion of the protruding portion by disposing yokes and permanent magnets alternately in the circumferential direction. Magnetic-path surfaces of the yokes radially face the side surface.

公开(公告)号：US20170187255A1

公开(公告)日：2017-06-29

申请号：US15380232

申请日：2016-12-15

Applicant: JTEKT CORPORATION

Inventor： Naotake KANDA ,  Hiroshi YOSHIKAWA ,  Taiki TAKEUCHI ,  Yoshiyuki SHIBATA

IPC: H02K1/27 ,  H02K1/02

CPC classification number: H02K1/272 ,  H02K1/02 ,  H02K1/2766 ,  H02K15/03

Abstract: An object is to provide an interior permanent magnet rotor unit that allows possible demagnetization to be suppressed regardless of a material for a portion of a permanent magnet, which is positioned on an outward side in a radial direction of a core. A core is a laminate of first thin-plate-like members and second thin-plate-like members. The first thin-plate-like members and the second thin-plate-like members have first insertion slots and second insertion slots each of which is filled with a permanent magnet. In the first thin-plate-like members, a separating portion is formed at an end of each of the first insertion slots or the second insertion slots, which end is located on an outward side of the insertion slot in a radial direction, to form a slit in the corresponding permanent magnet.

公开(公告)号：US20140225469A1

公开(公告)日：2014-08-14

申请号：US14174180

申请日：2014-02-06

Applicant: JTEKT CORPORATION

Inventor： Hiroshi YOSHIKAWA ,  Akira HIRAMITSU

IPC: H02K1/27

CPC classification number: H02K1/274 ,  H01F13/003 ,  H02K1/2773 ,  H02K15/03 ,  H02K2201/15

Abstract: A magnet embedded rotor configured such that the magnetization ratio of field permanent magnets is improved is provided. The magnet embedded rotor includes a first annular core in which first permanent magnets are embedded, and a second annular core in which second permanent magnets, which are independent from the first permanent magnets, are embedded. The magnet embedded rotor has a structure in which the second annular core is fitted onto the outer periphery of the first annular core. The first permanent magnets and the second permanent magnets constitute field permanent magnets.

Abstract translation: 提供了一种磁体嵌入式转子，其被配置成使得场永磁体的磁化比得以改善。 磁体嵌入式转子包括嵌入有第一永磁体的第一环形铁心和嵌入第一永久磁铁的第二永久磁铁的第二环形铁芯。 磁体嵌入式转子具有第二环形芯安装在第一环形芯的外周上的结构。 第一永磁体和第二永磁体构成现场永磁体。