Rotary electric machine stator and rotary electric machine

Patent metadata

Field	Value
Publication number	US-9847688-B2
Application number	US-201214433756-A
Country	US
Kind code	B2
Filing date	Nov 14, 2012
Priority date	Nov 14, 2012
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

An insertion groove is disposed on a tubular portion overlapping portion that is overlapped with an inner circumferential surface of a tubular portion of the stator core. Inter-coil insulating bodies that are disposed between a plurality of stator coils include a groove inserted portion. The groove inserted portion includes: a first inserted portion that can be inserted inside the insertion groove when the insulating film is in a bent and folded state; and a second inserted portion that is contiguous to the first inserted portion, a shape of a visible outline of a cross section of the second inserted portion being different than that of the first inserted portion. The second inserted portion generates a stronger elastic force of recovery than the first inserted portion when the groove inserted portion is inserted into the insertion groove.

First claim

The invention claimed is:

1. A rotary electric machine stator comprising:
a stator core including:
a tubular portion; and
a plurality of magnetic pole tooth portions that are disposed so as to each protrude radially inward from the tubular portion so as to be spaced apart from each other in a circumferential direction of the tubular portion, the magnetic pole tooth portions surrounding an outer circumference of a rotor;

a plurality of stator coils that are respectively disposed on the magnetic pole tooth portions;
a coil-core insulating body that has a tubular portion overlapping portion that overlaps with an inner circumferential surface of the tubular portion, the coil-core insulating body ensuring an insulated state between the stator coil and the stator core; and
an inter-coil insulating body that is formed by bending an insulating film, and that is disposed between the stator coils so as to ensure an insulated state between the stator coils,
wherein:
an insertion groove that is open toward a radially inner side of the stator core is disposed parallel to an axial direction of the stator core on the tubular portion overlapping portion;
the inter-coil insulating body includes a groove inserted portion that generates an elastic force of recovery so as to be held inside the insertion groove by being inserted into the insertion groove parallel to a longitudinal direction of the insertion groove;
the groove inserted portion includes:
a first inserted portion that can be inserted inside the insertion groove from a longitudinal end portion of the insertion groove when the insulating film is in a bent and folded state; and
a second inserted portion that is contiguous to the first inserted portion in a direction in which the groove inserted portion is inserted into the insertion groove, a shape of a visible outline of a cross section of the second inserted portion being different than that of the first inserted portion; and

the second inserted portion generates a stronger elastic force of recovery than the first inserted portion when the groove inserted portion is inserted into the insertion groove.

2. The rotary electric machine stator according to claim 1 , wherein the shape of the visible outline of the cross section of the second inserted portion is an approximate C shape when the groove inserted portion is outside the insertion groove.

3. The rotary electric machine stator according to either of claim 1 , wherein an area that is surrounded by the visible outline of the cross section of the second inserted portion expands continuously away from the first inserted portion when the groove inserted portion is outside the insertion groove.

4. The rotary electric machine stator according to claim 1 , wherein a maximum dimension of the second inserted portion is greater than a maximum dimension of the first inserted portion in a depth direction of the insertion groove when the groove inserted portion is outside the insertion groove.

5. The rotary electric machine stator according to claim 1 , wherein the inter-coil insulating body is formed by bending the insulating film that has a quadrangular shape.

6. The rotary electric machine stator according to claim 1 , wherein the first inserted portion is formed by bending and folding the insulating film by heat pressing.

7. A rotary electric machine comprising:
a rotor; and
a stator according to claim 1 , the stator surrounding an outer circumference of the rotor.

Assignees

• Hirota Yutaka
• Hashimoto Akira
• Boku Kazuhiko
• Mitsubishi Electric Corp

Inventors

• Hirota Yutaka
• Hashimoto Akira
• Boku Kazuhiko

Classifications

• H02K2203/12

  Machines characterised by the bobbins for supporting the windings · CPC title

• H02K3/345 Primary

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

• H02K3/325 Primary

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

• H02K3/522

  for generally annular cores with salient poles · CPC title

• H02K15/10

  Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes · CPC title