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：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：US20160126792A1

公开(公告)日：2016-05-05

申请号：US14921507

申请日：2015-10-23

Applicant: JTEKT CORPORATION

Inventor： Ryosuke YAMAGUCHI ,  Keita NIMURA ,  Koji TACHI

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

CPC classification number: H02K15/03 ,  H02K1/2766 ,  H02K15/12

Abstract: An interior permanent magnet rotor includes a cylindrical rotor core having an axial hole extending in an axial direction, and a resin magnet that is formed to fill the axial hole by injection molding and that has a pair of axial end faces. The resin magnet includes a linear portion that has a linear shape in section perpendicular to the axial direction of the rotor core. The linear portion has a first end and a second end located closer to an outer periphery of the rotor core than the first end is. A gate mark is located on the second end of the linear portion on at least one of the axial end faces of the resin magnet.

Abstract translation: 内部永磁转子包括具有沿轴向延伸的轴向孔的圆柱形转子芯和形成为通过注射成型填充轴向孔并具有一对轴向端面的树脂磁体。 树脂磁体包括在与转子芯的轴向垂直的截面中具有直线形状的直线部分。 直线部分具有比第一端更靠近转子芯的外周的第一端和第二端。 栅极标记位于树脂磁体的至少一个轴向端面上的直线部分的第二端上。