公开(公告)号：US20230032685A1

公开(公告)日：2023-02-02

申请号：US17963455

申请日：2022-10-11

Applicant: DENSO CORPORATION

Inventor： Masaru HARADA ,  Ritsurou HIRAMATSU ,  Toshihiro UCHIDA

IPC: H02K15/03 ,  H02K1/276 ,  H02K21/16

Abstract: A rotor includes a permanent magnet, which is inserted in a magnet receiving hole of a rotor core and is shaped in a form of a mountain fold that is convex toward a radially inner side. A manufacturing device for the rotor includes a magnetizing device that magnetizes the inserted permanent magnet from an outside of the rotor. The magnetizing device includes: a first magnetizing unit that is placed on one side of the rotor in an axial direction and includes a magnetizing coil which supplies a magnetizing magnetic flux to the permanent magnet; and a second magnetizing unit that is placed on another side of the rotor in the axial direction and includes a magnetizing coil which supplies a magnetizing magnetic flux to the permanent magnet.

公开(公告)号：US20230017419A1

公开(公告)日：2023-01-19

申请号：US17954061

申请日：2022-09-27

Applicant: DENSO CORPORATION

Inventor： Masaru HARADA ,  Ritsurou HIRAMATSU ,  Toshihiro UCHIDA

IPC: H02K15/03 ,  H02K1/18 ,  H01F13/00

Abstract: An apparatus for manufacturing a rotor includes a magnetizer. The magnetizer is configured to magnetize a permanent magnet in a rotor from outside the rotor. The rotor includes a rotor core having a magnet insertion hole. The permanent magnet is provided in an embedded state in the magnet insertion hole and has a bent-back shape protruding radially inward. The magnetizer includes a first yoke portion, a second yoke portion, and a magnetization coil. The first yoke portion has an opposing portion facing an outer peripheral surface of the rotor. The second yoke portion forms a magnetic path together with the first yoke portion. The magnetization coil is disposed on the magnetic path of the first and second yoke portions. The magnetizer magnetizes the permanent magnet by energizing the magnetization coil to apply a magnetizing magnetic flux at least through the rotor between the first yoke portion and the second yoke portion, which are located opposed to each other in a radial direction of the rotor.