Rotating electrical machine

Patent metadata

Field	Value
Publication number	US-12244191-B2
Application number	US-202217678674-A
Country	US
Kind code	B2
Filing date	Feb 23, 2022
Priority date	Aug 29, 2019
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

A stator with a multi-phase stator winding including phase windings each made of several winding segments, the segments including intermediate conductor portions arranged away from each other in a circumferential direction and link portions located at first and second radial end sides and connect the paired intermediate conductor portions into an annular shape. The winding segments are adjacent each other in a circumferential direction partially overlapping in the circumferential direction and include first and second winding segments overlapping each other in the circumferential direction. The link portions of the first winding segments are bent radially inward at at least one of axially opposed ends of the stator winding. The link portions of the second winding segments are bent radially outward at the at least one of the axially opposed ends of the stator winding. These link portions are arranged not overlapping in an axial direction of the stator.

First claim

What is claimed is:

1. A rotating electrical machine comprising:
a rotor which is rotatable along with a rotating shaft and includes a magnet unit equipped with a plurality of magnetic poles whose polarities alternate in a circumferential direction of the rotor; and
a stator which is equipped with a multi-phase stator winding including phase windings each of which is made of a plurality of winding segments, the stator being arranged to face the rotor in a radial direction thereof, wherein
each of the winding segments includes a pair of intermediate conductor portions and link portions,
the intermediate conductor portions are arranged at a given interval away from each other in the circumferential direction,
the link portions define a first end and a second end of the winding segment which are opposed to each other in the axial direction and connect the pair of intermediate conductor portions together into an annular form,
the pair of intermediate conductor portions and the link portions are made of a conductor wound multiple times,
the plurality of winding segments are arranged adjacent each other in the circumferential direction and partially overlap each other in the circumferential direction,
the winding segments include first winding segments and second winding segments which overlap each other in the circumferential direction,
the link portions defining the first end and the second end of each of the first winding segments are radially bent away from the rotor,
the link portions defining one of the first and second ends of each of the second winding segments are not radially bent,
the link portions defining other of the first and second ends of each of the second winding segments are radially bent toward the rotor, and
the link portions of the winding segments are arranged not to overlap each other in the axial direction.

2. The rotating electrical machine as set forth in claim 1 , wherein the winding segments includes two types of winding segments: the first winding segments and the second winding segments.

3. A rotating electrical machine comprising:
a rotor which is rotatable along with a rotating shaft and includes a magnet unit equipped with a plurality of magnetic poles whose polarities alternate in a circumferential direction of the rotor; and
a stator which is equipped with a multi-phase stator winding including phase windings each of which is made of a plurality of winding segments, the rotating electrical machine being of an outer-rotor type in which the rotor is arranged radially outside the stator, wherein
each of the winding segments includes a pair of intermediate conductor portions and link portions,
the intermediate conductor portions are arranged at a given interval away from each other in the circumferential direction,
the link portions define a first end and a second end of the winding segment which are opposed to each other in the axial direction and connect the pair of intermediate conductor portions together into an annular form,
the pair of intermediate conductor portions and the link portions are made of a conductor wound multiple times,
the plurality of winding segments are arranged adjacent each other in the circumferential direction and partially overlap each other in the circumferential direction,
the winding segments include first winding segments and second winding segments which overlap each other in the circumferential direction,
one of the link portions of each of the first winding segments is bent radially inward at least at a first end that is one of axially opposed ends of the stator winding,
one of the link portions of each of the second winding segments is bent radially outward at least at the first end of the stator winding,
the one of the link portions of each of the first winding segments and the one of the link portions of each of the second winding segments are arranged not to overlap each other in the axial direction,
the link portion of at least one of the first and second ends of each of the second winding segments is bent toward the magnet unit which is disposed outside the second winding segments in the radial direction and which is located outside the magnet unit in the axial direction,
the rotor is equipped with a retainer which is secured to the rotating shaft and retains the magnet unit, and
the retainer is disposed to cover the link portions of the second winding segments bent toward the magnet unit from radially and axially outside the link portions.

4. The rotating electrical machine as set forth in claim 3 , wherein
the rotor is equipped with a disc-shaped contacting end which is located axially inside the link portions bent toward the magnet unit and placed in contact with an axial end surface of the magnet unit, and
the contacting end has a thin-walled portion which is formed on a radially inner end thereof and has a thickness from an axial end of the magnet unit which is smaller than that of a major portion of the contacting end.

5. The rotating electrical machine as set forth in claim 1 , wherein
the link portions of the first winding segments or the second winding segments are bent radially toward the magnet unit and located axially outside the magnet unit, and
the link portions bent toward the magnet unit are arranged away from the magnet unit in the axial direction at a location with which magnetic flux produced by the magnet unit does not interlink.

6. A rotating electrical machine comprising:
a rotor which is rotatable along with a rotating shaft and includes a magnet unit equipped with a plurality of magnetic poles whose polarities alternate in a circumferential direction of the rotor; and
a stator which is equipped with a multi-phase stator winding including phase windings each of which is made of a plurality of winding segments, the stator being arranged to face the rotor in a radial direction thereof, wherein
each of the winding segments includes a pair of intermediate conductor portions and link portions,
the intermediate conductor portions are arranged at a given interval away from each other in the circumferential direction,
the link portions define a first end and a second end of the winding segment which are opposed to each other in the axial direction and connect the pair of intermediate conductor portions together into an annular form,
the pair of intermediate conductor portions and the link portions are made of a conductor wound multiple times,
the plurality of winding segments are arranged adjacent each other in the circumferential direction and partially overlap each other in the circumferential direction,
the winding segments include first winding segments and second winding segments which overlap each other in the circumferential direction,
one of the link portions of each of the first winding segments is bent radially inward at least at a first end that is one of axially opposed ends of the stator winding,
one of the link portions of each of the second winding segments are bent radially outward at least at the first end of the stator winding,
the one of the link portions of each of the first winding segments and the one of the link portions of each of the second winding segments are arranged not to overlap each other in the axial direction, and
the link portions of the first winding segments or the second winding segments are bent radially toward the magnet unit and located axially outside the magnet unit, and
the link portions bent toward the magnet unit are arranged away from the magnet unit in the axial direction at a location with which magnetic flux produced by the magnet unit does not interlink.

7. The rotating electrical machine as set forth in claim 1 , wherein
the rotating electrical machine is of an outer-rotor type in which t

Assignees

• Denso Corp

Inventors

• Tamura Akito
• Iwase Kazuya

Classifications

• H02K15/0431

  Concentrated windings · CPC title

• H02K3/47

  Air-gap windings, i.e. iron-free windings · CPC title

• H01F41/06

  Coil winding · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title