公开(公告)号：US20240258854A1

公开(公告)日：2024-08-01

申请号：US18615893

申请日：2024-03-25

Applicant: DENSO CORPORATION

Inventor： WATARU NIWA ,  KENTA GOTO ,  YUKI TAKAHASHI

IPC: H02K1/2798 ,  H02K9/06 ,  H02K15/03 ,  H02K21/24

CPC classification number: H02K1/2798 ,  H02K9/06 ,  H02K15/03 ,  H02K21/24

Abstract: Multiple magnet units are provided in a rotor. Each of the magnet units includes multiple magnets. In the magnet unit, the multiple magnets are arranged in a circumferential direction. An outer surface of the magnet includes a first magnet surface. The magnet includes multiple magnet pieces stacked in a light direction. An outer surface of the magnet piece includes a first piece surface. The first magnet surface extends in a planar shape to span the multiple magnet pieces. The first magnet surface has multiple first piece surfaces. In the first magnet surface, the multiple first piece surfaces are flush with one another.

公开(公告)号：US20250038604A1

公开(公告)日：2025-01-30

申请号：US18912346

申请日：2024-10-10

Applicant: DENSO CORPORATION

Inventor： YUKI TAKAHASHI

IPC: H02K3/47

Abstract: In an armature, an inter-conductor member is provided between respective conductor portions in a circumferential direction. The inter-conductor member is made of a magnetic material that satisfies a relationship Wt×B100≤Wm×Br. Wt is a circumferential width of the inter-conductor member in one magnetic pole. B100 is a saturation magnetic flux density of the inter-conductor member. Wm is a circumferential width of the magnet in one magnetic pole, and Br is a residual magnetic flux density of the magnet. The saturation magnetic flux density B100 is a saturation magnetic flux density calculated with a magnetic density at a magnetizing force of 10,000 A/m.

公开(公告)号：US20230412022A1

公开(公告)日：2023-12-21

申请号：US18458623

申请日：2023-08-30

Applicant: DENSO CORPORATION

Inventor： YUKI TAKAHASHI

IPC: H02K1/278 ,  H02K21/14

CPC classification number: H02K1/278 ,  H02K21/145 ,  H02K2213/03

Abstract: A field magneton constitutes a rotating electric machine including an armature having an armature winding and is arranged radially facing the armature. The field magneton includes a magnet having a plurality of magnetic poles with alternating polarities in a circumferential direction. The magnet is oriented so that a direction of an axis of easy magnetization on a d-axis side, which is a magnetic pole center, is closer to a direction of the d-axis than the direction of the axis of easy magnetization on a q-axis side, which is a magnetic pole boundary. In the magnet, a coefficient of linear expansion in the direction of the axis of easy magnetization is different from the coefficient of linear expansion in the direction perpendicular to the axis of easy magnetization.

公开(公告)号：US20240039349A1

公开(公告)日：2024-02-01

申请号：US18450307

申请日：2023-08-15

Applicant: DENSO CORPORATION

Inventor： YUKI TAKAHASHI

IPC: H02K1/276 ,  H02K15/12 ,  H02K15/03

CPC classification number: H02K1/276 ,  H02K15/12 ,  H02K15/03 ,  H02K2213/03 ,  H02K2201/09

Abstract: There is provided a manufacturing method of a rotary electric machine, including: sintering each of a plurality of green compacts to obtain a plurality of sintered bodies; applying a grain boundary diffusion process on each sintered body by adhering an adhering material, which includes a heavy rare earth element, to at least one of a pair of planar surfaces of each sintered body, and then heating each sintered body to diffuse the heavy rare earth element into an inside of the sintered body; and forming a laminated body of a plurality of magnet segments by placing a corresponding one of the pair of planar surfaces of one of each adjacent two of the sintered bodies in contact with a corresponding one of the pair of planar surfaces of another one of the adjacent two of the sintered bodies.

公开(公告)号：US20230412029A1

公开(公告)日：2023-12-21

申请号：US18458629

申请日：2023-08-30

Applicant: DENSO CORPORATION

Inventor： MASASHI MATSUDA ,  YUKI TAKAHASHI

IPC: H02K3/47

CPC classification number: H02K3/47

Abstract: An armature winding of a rotary electric machine includes two systems of electrically independent windings. An armature winding of a first system is closer to the field element in the radial direction than an armature winding of a second system, A current control device is provided for controlling a current to the armature winding of the first system and the armature winding of the second system. In consideration of a difference in magnetic flux waveforms from the field element caused by a difference in the distance to the field element in the radial direction, the current control device differentiates a current waveform to the armature winding of the first system from a current waveform to the armature winding of the second system.

公开(公告)号：US20230412028A1

公开(公告)日：2023-12-21

申请号：US18458611

申请日：2023-08-30

Applicant: DENSO CORPORATION

Inventor： EIJI KIBA ,  YUKI TAKAHASHI

IPC: H02K3/47

CPC classification number: H02K3/47

Abstract: An armature winding of a rotary electric machine includes multi-phase windings. The phase winding of each phase includes a plurality of series-connected parts of the winding segments, and the series-connected parts are connected in parallel to form the phase winding. The winding segments include a first winding segment and a second winding segment, both having coil resistance different from each other. Each of the series-connected parts is formed by connecting the first winding segment and the second winding segment in series.

公开(公告)号：US20240258884A1

公开(公告)日：2024-08-01

申请号：US18615974

申请日：2024-03-25

Applicant: DENSO CORPORATION

Inventor： WATARU NIWA ,  RYOHEI OBA ,  YUKI TAKAHASHI

IPC: H02K11/225 ,  H02K3/52 ,  H02K21/24

CPC classification number: H02K11/225 ,  H02K3/52 ,  H02K21/24

Abstract: A motor device includes a stator, a rotor, a shaft, an electric power busbar, and a resolver. The shaft includes a shaft main body that rotates together with the rotor. The electric power busbar is provided at a position away from the shaft main body toward a radially outer side. The electric power busbar extends in an annular shape in a circumferential direction. The resolver is provided on the shaft main body and detects a rotation angle of the shaft main body. The resolver is provided at a position away from the electric power busbar toward a radially inner side. The resolver is in a state of entering between the electric power busbar and the shaft main body.

公开(公告)号：US20240039381A1

公开(公告)日：2024-02-01

申请号：US18453957

申请日：2023-08-22

Applicant: DENSO CORPORATION

Inventor： YUKI TAKAHASHI

IPC: H02K21/12 ,  H02K15/00 ,  H02K3/30

CPC classification number: H02K21/12 ,  H02K15/0068 ,  H02K3/30 ,  H02K2203/06

Abstract: In a multiphase armature winding provided in an armature that constitutes a rotating electric machine and that is configured by conductive wire material, the conductive wire material for each phase includes an assembly of strands having a conductor and an inner insulating layer of insulating material surrounding the conductor, and an outer insulating layer of insulating material surrounding the assembly of strands. The outer insulating layer is peeled off at an end of the conductive wire material. A tip of the conductive wire material at the peeled portion of the outer insulating layer is joined by welding or crimping to form a joint portion. At least a portion other than the joint portion, in the conductive wire material at the peeled portion of the outer insulating layer, is varnished.

公开(公告)号：US20230283137A1

公开(公告)日：2023-09-07

申请号：US18309742

申请日：2023-04-28

Applicant: DENSO CORPORATION

Inventor： YUKI TAKAHASHI

IPC: H02K3/47

CPC classification number: H02K3/47

Abstract: A field element includes magnetic poles having polarities alternate in a circumferential direction. A multi-phase armature winding includes a phase winding including winding segments for each phase. An armature is tooth-less and includes a cylindrical armature core. The winding segment includes a pair of intermediate conductor portions at a predetermined interval in the circumferential direction and link portions connecting the intermediate conductor portions in an annular shape. The intermediate conductor portions and the link portion include multi-wound conductive wire members. The intermediate conductor portions are disposed side by side along a curved surface on a peripheral surface of the armature core. The intermediate conductor portion has a rectangular transverse section. A dimension between the end surface of the intermediate conductor portion on the armature core side and the armature core in the radial direction differ in the circumferential direction.