Rotor of rotating electric machine

Patent metadata

Field	Value
Publication number	US-10848028-B2
Application number	US-201515754306-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Nov 6, 2015
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A detachment prevention portion extending in a circumferential direction of a flange portion of a bobbin from a neck portion of a locking portion provided so as to extend radially outward from the flange portion is formed such that a length by which the detachment prevention portion extends to one side in the circumferential direction is longer than a length by which the detachment prevention portion extends to another side in the circumferential direction. Accordingly, interference between cover portions and a field coil winding or between the cover portions and a winding jig for the winding during operation of winding a lead wire of the winding can be inhibited while electric insulation between a field coil and claw-shaped magnetic poles is ensured.

First claim

The invention claimed is:

1. A rotor of a rotating electric machine, comprising:
a field core having claw-shaped magnetic poles and configured to rotate about a shaft integrally with the shaft in a circumferential direction, the circumferential direction comprising a first circumferential direction and a second circumferential direction that is opposite from the first circumferential direction; and
a bobbin including a winding portion, fixed to the field core, for winding a field coil, flange portions provided at both sides, in an axial direction, of the winding portion, and a locking portion provided so as to extend radially outward from the flange portion and locking at least one end portion of the field coil, wherein
the locking portion includes a locking neck portion, the field coil being wound on the locking neck portion, and a detachment prevention portion extending from the locking neck portion in the first circumferential direction and the second circumferential direction, and a length of the detachment prevention portion extending from the locking neck portion in the first circumferential direction is longer than a length of the detachment prevention portion extending from the locking neck portion in the second circumferential direction, and a center of the locking neck portion is circumferentially displaced relative to a center of the rotation prevention portion.

2. The rotor of the rotating electric machine according to claim 1 , wherein a projection is formed at the one side, in the first circumferential direction, of the detachment prevention portion so as to project radially inward.

3. The rotor of the rotating electric machine according to claim 1 , wherein the first circumferential directional that the detachment prevention portion extends corresponds to a first side of bobbin winding, and
wherein the second circumferential directional that the detachment prevention portion extends corresponds to a second side of bobbin winding.

4. The rotor of the rotating electric machine according to claim 1 , wherein a plurality of cover portions insulating the field coil and the field core from each other are formed on the flange portions in the first circumferential direction so as to extend from outer peripheral portions of the flange portions, and the locking portion is disposed between adjacent cover portions among the plurality of cover portions.

5. The rotor of the rotating electric machine according to claim 1 , wherein the center of the locking neck portion is displaced in the first circumferential direction relative to a center of a recess between the claw magnetic poles.

6. The rotor of the rotating electric machine according to claim 1 , wherein a plurality of rotation prevention portions are provided on the flange portions in the first circumferential direction.

7. A rotor of a rotating electric machine, comprising:
a field core having claw-shaped magnetic poles and configured to rotate about a shaft integrally with the shaft; and
a bobbin including a winding portion, fixed to the field core, for winding a field coil, flange portions provided at both sides, in an axial direction, of the winding portion, a locking portion provided so as to extend radially outward from the flange portion and locking at least one end portion of the field coil, and a plurality of rotation prevention portions provided on the flange portions in a circumferential direction comprising a first circumferential direction and a second circumferential direction that is opposite from the first circumferential direction so as to project in an axial direction, wherein
the locking portion includes a locking neck portion, the field coil being wound on the locking neck portion, and a detachment prevention portion extending from the locking neck portion in the first circumferential direction and the second circumferential direction, and a center of the locking neck portion is circumferentially displaced relative to a center of the rotation prevention portion.

8. The rotor of the rotating electric machine according to claim 7 , wherein a projection is formed at the one side, in the first circumferential direction, of the detachment prevention portion so as to project radially inward.

9. The rotor of the rotating electric machine according to claim 7 , wherein the one side of the detachment prevention portion extends in the first circumferential direction toward a first side of bobbin winding.

10. The rotor of the rotating electric machine according to claim 7 , wherein a plurality of cover portions insulating the field coil and the field core from each other are formed on the flange portions of the bobbin in the circumferential direction so as to extend from outer peripheral portions of the flange portions, and the locking portion is disposed between adjacent cover portions among the plurality of cover portions.

Assignees

• Mitsubishi Electric Corp

Inventors

• Imazawa Yoshiro
• Shimizu Shintaro
• Maekawa Kenji
• Shinosaka Yoshihiro

Classifications

• H02K3/528 Primary

  of the claw-pole type · CPC title

• H02K2203/12

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

• H02K1/243

  of the claw-pole type · CPC title

• H02K3/325 Primary

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