Armature and motor

Patent metadata

Field	Value
Publication number	US-2024235311-A1
Application number	US-202418616546-A
Country	US
Kind code	A1
Filing date	Mar 26, 2024
Priority date	Sep 27, 2021
Publication date	Jul 11, 2024
Grant date	—

Abstract

A stator includes an armature core having an annular shape, coils, and an insulator. The coils are arranged along the armature core. Each of the coils is a wound conductive winding. Each of the coils includes a pair of facing portions disposed to be aligned in a circumferential direction with a predetermined interval therebetween. The first and second facing portions of each of the coils constitute intermediate portions of the corresponding one of the coils. Each of the coils includes a pair of first and second coil end portions that link the facing portions to each other. The insulator is arranged between the stator core and the coils. The insulator includes a base comprised of an insulating material, and one or more soft-magnetic members each being comprised of a soft-magnetic material, the one or more soft-magnetic members being contained in the base.

First claim

1 . An armature comprising:
an armature core having an annular shape; and a plurality of coils arranged along the armature core, each of the coils being a wound conductive winding, each of the coils comprising:
a pair of facing portions disposed to be aligned in a circumferential direction with a predetermined interval therebetween, the first and second facing portions of each of the coils constituting intermediate portions of the corresponding one of the coils; and
a pair of first and second coil end portions that link the facing portions to each other; and
an insulator arranged between the stator core and the coils, the insulator comprising:
a base comprised of an insulating material;
one or more soft-magnetic members each being comprised of a soft-magnetic material, the one or more soft-magnetic members being contained in the base; and
a facing-portion intervention member arranged between the armature core and the facing portions of the coils,
wherein: the one or more soft-magnetic members are contained at least in the facing-portion intervention member of the insulator; the insulator further comprises at least one intervening protrusion that protrudes from the facing-portion intervention member toward a side of the coils, the at least one intervening protrusion being disposed to intervene a corresponding selected adjacent pair of the facing portions of the coils; and the one or more soft-magnetic members are contained in the at least one intervening protrusion.

2 . An armature comprising:
an armature core having an annular shape; and a plurality of coils arranged along the armature core, each of the coils being a wound conductive winding, each of the coils comprising:
a pair of facing portions disposed to be aligned in a circumferential direction with a predetermined interval therebetween, the first and second facing portions of each of the coils constituting intermediate portions of the corresponding one of the coils; and
a pair of first and second coil end portions that link the facing portions to each other; and
an insulator arranged between the stator core and the coils, the insulator comprising:
a base comprised of an insulating material;
one or more soft-magnetic members each being comprised of a soft-magnetic material, the one or more soft-magnetic members being contained in the base; and
first and second coil-end intervention members,
the first coil-end intervention member being arranged between the first coil end portion and the armature core, the second coil-end intervention member being arranged between the second coil end portion and the armature core, the one or more soft-magnetic members being contained at least in each of the first and second coil-end cover members, wherein: each of the first and second coil-end intervention members has a facing surface facing the armature core; the insulator further comprises:
a first void formed along the facing surface of the first coil-end intervention member, so that the first coil-end intervention member is separated from the armature core; and
a second void formed along the facing surface of the second coil-end intervention member, so that the second coil-end intervention member is separated from the armature core;
the facing surface of each of the first and second coil-end intervention members has formed thereon a first edge defined as an inner periphery of the first void, the first edge being disposed to be in contact with the armature core; and the facing surface of each of the first and second coil-end intervention members has formed thereon a second edge defined as an outer periphery of the second void, the second edge being disposed to be in contact with the armature core.

3 . The armature according to claim 1 , wherein:
each of the first and second coil-end intervention members has a coil-facing surface that faces at least one of the coils; and the coil-facing surface of each of the first and second coil-end intervention members is convexly curved outward to form a curved surface; and each of the coils is disposed along the curved surface of the coil-facing surface of each of the first and second coil-end intervention members.

4 . The armature according to claim 2 , wherein:
each of the first and second coil-end intervention members has a coil-facing surface that faces at least one of the coils; and the coil-facing surface of each of the first and second coil-end intervention members is convexly curved outward to form a curved surface; and each of the coils is disposed along the curved surface of the coil-facing surface of each of the first and second coil-end intervention members.

5 . The armature according to claim 1 , wherein:
the insulator includes a plurality of bobbin members, each of the coils being wound around the corresponding one of the bobbin members; and the one or more soft-magnetic members are contained in each of the bobbin members.

6 . The armature according to claim 2 , wherein:
the insulator includes a plurality of bobbin members, each of the coils being wound around the corresponding one of the bobbin members; and the one or more soft-magnetic members are contained in each of the bobbin members.

7 . A motor comprising:
one of a stator and a rotor, the one of the stator and rotor comprising the armature according to claim 1 ; and the other of the stator and the rotor comprising a plurality of magnets arranged to radially or axially face the facing portions of each of the coils

8 . A motor comprising:
one of a stator and a rotor, the one of the stator and rotor comprising the armature according to claim 2 ; and the other of the stator and the rotor comprising a plurality of magnets arranged to radially or axially face the facing portions of each of the coils

Assignees

• Denso Corp

Inventors

• Hayashi Yuji
• Yamamoto Toshio
• Tateishi Yusuke

Classifications

• H02K3/522

  for generally annular cores with salient poles · CPC title

• H02K3/325

  for windings on salient poles, such as claw-shaped poles · CPC title

• H02K3/47 Primary

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

• H02K21/14

  with magnets rotating within the armatures · CPC title

• H02K3/34

  between conductors or between conductor and core, e.g. slot insulation · CPC title