Rotating electrical machine

Patent metadata

Field	Value
Publication number	US-12068670-B2
Application number	US-202117411132-A
Country	US
Kind code	B2
Filing date	Aug 25, 2021
Priority date	Feb 25, 2019
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

Abstract

In a rotating electrical machine, a holder member is disposed to be radially closer to an armature coil than to a magnetic field generator. The holder member is configured to hold the armature coil. The holder member has a first portion that faces a first end portion of the armature coil, and a second portion that faces a second end portion of the armature coil. The first portion of the holder member is thermally coupled to the first end portion of the armature coil. The second portion of the holder member is thermally coupled to the second end portion of the armature coil.

First claim

What is claimed is:

1. A rotating electrical machine comprising:
a magnetic field generator that comprises a magnet unit, the magnet unit including a plurality of magnetic poles arranged to have magnetic polarities that alternate in a circumferential direction of the rotating electrical machine;
an armature that comprises a hollow cylindrical core and a multi-phase armature coil having opposing first and second ends in an axial direction of the rotating electrical machine, one of the magnetic field generator and the armature serving as a rotor,
the armature coil including:
a side portion that radially faces the magnet unit and comprises coil parts for each phase; and
a pair of first and second end portions disposed at the respective first end and second end, each of the first and second end portions electrically connecting the coil parts of the side portion for each phase to constitute a circuit for the corresponding phase; and

a holder member located as an independent member from the armature, with the hollow cylindrical core of the armature between the holder member and the magnetic field generator so that the holder member is disposed to be radially closer to the armature coil than to the magnetic field generator, the holder member being configured to hold the armature coil, the holder member having:
a first portion that faces the first end portion of the armature coil; and
a second portion that faces the second end portion of the armature coil, the first portion of the holder member being thermally coupled to an inner peripheral side of the first end portion of the armature coil, the second portion of the holder member being thermally coupled to an inner peripheral side of the second end portion of the armature coil.

2. The rotating electrical machine according to claim 1 , wherein:
the holder member has opposing first and second ends in the axial direction of the rotating electrical machine, each of the first and second ends having a corresponding one of a first outer surface and a second outer surface; and
the first and second ends of the armature coil are respectively assembled to the first outer surface of the first end of the holder member and to the second outer surface of the second end of the holder member.

3. The rotating electrical machine according to claim 2 , further comprising:
a first mount member disposed at the first end portion of the armature coil and configured to mount the armature coil to the holder member;
a second mount member disposed at the first end portion of the armature coil and configured to mount the armature coil to the holder member;
a first fastening member configured to fasten the first mount member to a first surface of the first end portion of the armature coil; and
a second fastening member configured to fasten the second mount member to a second surface of the second end portion of the armature coil.

4. The rotating electrical machine according to claim 3 , wherein:
the armature coil comprises at least a first phase winding and a second phase winding, the first phase winding comprising a plurality of winding segments, the second phase winding comprising a plurality of winding segments;
each of the winding segments is made of a conductive wire member that is multiply wound, each of the winding segments comprising:
a pair of intermediate conductor portions each extending in the axial direction, each of the intermediate conductor portions having opposing first and second ends in the axial direction, the intermediate conductor portions being arranged at a predetermined interval away from one another in the circumferential direction;
a first link portion disposed to constitute the first end portion of the armature coil and to link the first ends of the intermediate conductor portions with one another; and
a second link portion disposed to constitute the second end portion of the armature coil and to link the second ends of the intermediate conductor portions with one another;

the winding segments of the first and second phase windings are arranged in the circumferential direction in a predetermined order such that:
one of the intermediate conductor portions of each winding segment of one of the first and second phase windings is disposed between the intermediate conductor portions of a circumferentially adjacent one of the winding segments of the other of the first and second phase windings;

the first link portion of each winding segment of one of the first and second phase windings intersects with the first link portion of a circumferentially adjacent one of the winding segments of the other of the first and second phase windings;
the second link portion of each winding segment of one of the first and second phase windings intersects with the second link portion of a circumferentially adjacent one of the winding segments of the other of the first and second phase windings;
the first mount member comprises a plurality of first mount members for each of the first and second phase windings, each of the first mount members for each of the first and second phase windings being integrally mounted to a corresponding one of the winding segments of a corresponding one of the first and second phase windings;
the second mount member comprises a plurality of second mount members for each of the first and second phase windings, each of the second mount members for each of the first and second phase windings being integrally mounted to a corresponding one of the winding segments of a corresponding one of the first and second phase windings;
each of the first and second fastening members comprises a plurality of fasteners;
each winding segment of one of the first and second phase windings is circumferentially adjacent to a circumferentially adjacent one of the winding segments of the other first and second phase windings while:
the first and second link portions of the corresponding winding segment of the one of the first and second phase windings respectively intersect with the first and second link portions of the circumferentially adjacent one of the winding segments of the other first and second phase windings;
the first mount member integrally mounted to the corresponding winding segment of the one of the first and second phase windings and the first mount member integrally mounted to the circumferentially adjacent one of the winding segments of the other first and second phase windings are fastened to the first surface of the first end portion of the armature coil with a common one of the fasteners of the first fastening member; and
the second mount member integrally mounted to the corresponding winding segment of the one of the first and second phase windings and the second mount member integrally mounted to the circumferentially adjacent one of the winding segments of the other first and second phase windings are fastened to the second surface of the second end portion of the armature coil with a common one of the fasteners of the second fastening member.

5. The rotating electrical machine according to claim 1 , wherein:
the holder member comprises:
an outer cylindrical member having a hollow cylindrical shape, a predetermined outer diameter, and opposing first and second ends in the axial direction, each of the first and second ends having a corresponding one of a first outer surface and a second outer surface; and
an inner cylindrical member having a hollow cylindrical shape, a predetermined outer diameter, and opposing first and second ends in the axial direction, each of the first and second ends having a corresponding one of a first outer surface and a second outer surface, the inner cylindrical member being disposed radially inside the outer cylindrical member to have a clearance between the outer cylindrical member and the inner cylindrical

Assignees

• Denso Corp

Inventors

• Tamura Akito
• Mawatari Yuki
• Tsuchiya Hiroyuki

Classifications

• H02K3/50

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K21/14

  with magnets rotating within the armatures · CPC title

• H02K2203/06

  Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations · CPC title

• H02K5/203

  specially adapted for liquids, e.g. cooling jackets · CPC title

• H02K9/227

  Heat sinks · CPC title