Rotating electric machine

Patent metadata

Field	Value
Publication number	US-12009712-B2
Application number	US-202217578243-A
Country	US
Kind code	B2
Filing date	Jan 18, 2022
Priority date	Jul 17, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A rotating electric machine includes an armature coil having a plurality of phase windings for respective phases. Each of the phase windings is constituted of a plurality of partial windings each having a pair of intermediate conductor portions and a pair of bridging portions connecting the pair of intermediate conductor portions. All the intermediate conductor portions of the partial windings are arranged in a predetermined sequence in a circumferential direction. At each of coil ends of the armature coil, the bridging portions of the partial windings of different phases intersect one another. Each of the partial windings has a mounting member provided integrally therewith for mounting it to a support member. For each circumferentially-adjacent pair of the partial windings whose bridging portions intersect one another, the mounting members provided respectively integrally with the pair of the partial windings are together fixed to the support member by a common fixing member.

First claim

What is claimed is:

1. A rotating electric machine comprising:
a field system having a plurality of magnetic poles whose polarities alternate in a circumferential direction;
a multi-phase armature coil radially opposed to the field system, the armature coil including a plurality of phase windings provided respectively for a plurality of phases, each of the phase windings being constituted of a plurality of partial windings; and
a support member provided on a radially opposite side of the armature coil to the field system to support the partial windings,
wherein
each of the partial windings has a pair of intermediate conductor portions and a pair of bridging portions, the pair of intermediate conductor portions each extending in an axial direction and being located at a predetermined interval in the circumferential direction, the pair of bridging portions being located respectively on opposite axial sides of the pair of intermediate conductor portions to connect the pair of intermediate conductor portions,
each of the partial windings is formed of an electrical conductor wire that is multiply wound in the pair of intermediate conductor portions and the pair of bridging portions,
in each of the partial windings, there is interposed, between the pair of intermediate conductor portions of the partial winding, one of the pair of intermediate conductor portions of another of the partial windings which is of a different phase from the partial winding,
all the intermediate conductor portions of the partial windings constituting the phase windings of the armature coil are arranged in a predetermined sequence and in alignment with each other in the circumferential direction,
the armature coil has a pair of coil ends located respectively on opposite axial sides of the support member,
at either or both of the coil ends of the armature coil, the bridging portions of the partial windings of different phases intersect one another,
each of the partial windings has a mounting member provided integrally therewith for mounting the partial winding to the support member, and
for each circumferentially-adjacent pair of the partial windings whose bridging portions intersect one another, the mounting members provided respectively integrally with the pair of the partial windings are together fixed to the support member by a common fixing member.

2. The rotating electric machine as set forth in claim 1 , wherein
the partial windings constituting the phase windings of the armature coil include first partial windings and second partial windings,
each of the first partial windings has, as the pair of bridging portions thereof, a pair of first bridging portions that are radially bent from the pair of intermediate conductor portions of the first partial winding to the support member side,
each of the second partial windings has, as the pair of bridging portions thereof, a pair of second bridging portions each of which extends, on an axially outer side of the first bridging portions of the first partial windings, circumferentially across part of at least one of the first bridging portions,
each of the first partial windings has, as the mounting member thereof, a first mounting member provided integrally therewith,
each of the second partial windings has, as the mounting member thereof, a second mounting member provided integrally therewith, the second mounting member having a pair of protruding portions that radially protrude respectively from the pair of second bridging portions of the second partial winding to the support member side,
at either or both of the coil ends of the armature coil, the protruding portions of the second mounting members are arranged to overlap corresponding ones of the first mounting members in the axial direction, and
for each axially-overlapping pair of one of the first mounting members and one of the protruding portions of the second mounting members, the fixing member is provided to engage with both the first mounting member and the protruding portion and fix them together to the support member.

3. The rotating electric machine as set forth in claim 2 , wherein
in each of the first partial windings, the first mounting member is mounted to cover a range including at least the pair of first bridging portions of the first partial winding, and
in each of the second partial windings, the second mounting member is mounted to cover a range including at least the pair of second bridging portions of the second partial winding.

4. The rotating electric machine as set forth in claim 3 , wherein
each of the first mounting members has, for each of the pair of first bridging portions of the first partial winding, a pair of side walls covering the first bridging portion respectively from opposite circumferential sides of the first bridging portion,
each of the first mounting members also has a pair of first engaged portions formed respectively in the pair of side walls thereof,
each of the second mounting members has, for each of the pair of second bridging portions of the second partial winding, one of the protruding portions thereof formed in a part of the second mounting member which covers the second bridging portion,
each of the second mounting members also has, in each of the protruding portions thereof, a second engaged portion formed at a center position between two ends of the second mounting member in the circumferential direction, and
at either or both of the coil ends of the armature coil, for each axially-overlapping pair of one of the first mounting members and one of the protruding portions of the second mounting members, one of the first engaged portions formed in the pair of side walls of the first mounting member and the second engaged portion formed in the protruding portion are axially connected with each other and the fixing member engages with the axially-connected first and second engaged portions.

5. The rotating electric machine as set forth in claim 4 , wherein
each of the first bridging portions of the first partial windings has such a curved shape as to be convex toward the support member side in a radial direction, and
in each of the first mounting members, the first engaged portions are respectively formed, in the side walls of the first mounting member, at positions outside curved parts of the first bridging portions of the first partial winding covered by the first mounting member.

6. The rotating electric machine as set forth in claim 3 , wherein
each of the first mounting members has, for each of the pair of first bridging portions of the first partial winding, an overlapping portion formed in a part of the first mounting member which covers the first bridging portion, the overlapping portion being located at a position axially overlapping the support member and between the pair of intermediate conductor portions of the first partial winding in the circumferential direction,
each of the first mounting members also has a first engaged portion formed in the overlapping portion,
each of the second mounting members has, for each of the pair of second bridging portions of the second partial winding, one of the protruding portions thereof formed in a part of the second mounting member which covers the second bridging portion, the protruding portions being formed in a range including both ends of the second mounting member in the circumferential direction,
each of the second mounting members also has, in each of the protruding portions thereof, a pair of second engaged portions formed respectively at opposite circumferential ends of the protruding portion, and
at either or both of the coil ends of the armature coil, for each axially-overlapping pair of one of the first mounting members and one of the protruding portions of the second mounting members,

Assignees

• Denso Corp

Inventors

• Mawatari Yuuki
• Tamura Akito

Classifications

• H02K15/02

  of stator or rotor bodies · CPC title

• H02K3/47

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

• H02K3/28 Primary

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K21/22 Primary

  with magnets rotating around the armatures, e.g. flywheel magnetos · CPC title