公开(公告)号：US12131853B2

公开(公告)日：2024-10-29

申请号：US17954061

申请日：2022-09-27

Applicant: DENSO CORPORATION

Inventor： Masaru Harada ,  Ritsurou Hiramatsu ,  Toshihiro Uchida

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

CPC classification number: H01F13/003 ,  H02K1/18 ,  H02K15/03

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.

公开(公告)号：US20240221987A1

公开(公告)日：2024-07-04

申请号：US18606050

申请日：2024-03-15

Applicant: DENSO CORPORATION

Inventor： Masaru Harada ,  Ritsuro Hiramatsu ,  Toshihiro Uchida

IPC: H01F13/00 ,  H02K15/03

CPC classification number: H01F13/003 ,  H02K15/03 ,  H02K2215/00

Abstract: A manufacturing apparatus of a rotor is for a rotor having a permanent magnet provided in a state of being embedded inside a rotor core, the permanent magnet having a folding shape being convex towards a radially inside part. The manufacturing apparatus includes a magnetization apparatus that magnetizes the permanent magnet in the embedded state from outside the rotor. The magnetization apparatus is provided with a yoke part at least disposed in an axially outside part of the rotor, the yoke part constituting a magnetic path for supplying a magnetization flux to the permanent magnet. The yoke part includes at least one of a dust core, a laminated steel plate, and a slit having a function of suppressing eddy current occurring due to the magnetization flux.