Stator of rotary electric machine

Patent metadata

Field	Value
Publication number	US-10263484-B2
Application number	US-201415108070-A
Country	US
Kind code	B2
Filing date	Dec 22, 2014
Priority date	Dec 27, 2013
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A stator for a rotary electric machine includes a stator core, three-phase coils, and a neutral point connection conductor. The three-phase coils are wound around the stator core. The neutral point connection conductor is connected to each of the three-phase coils. The neutral point connection conductor includes a linear conductor that is bent. The linear conductor includes two end portions and an overlapping portion in which the conductor is folded back and doubled up. One of the two end portions is connected to one-phase coil of the three-phase coils. The other of the two end portions is connected to another-phase coil of the three-phase coils. The overlapping portion is connected to the remaining-phase coil of the three-phase coils.

First claim

The invention claimed is:

1. A stator for a rotary electric machine, the stator comprising:
a stator core;
three-phase coils that are wound around the stator core; and
a neutral point connection conductor that is connected to each of the three-phase coils, the neutral point connection conductor including a single continuous linear conductor that is bent, the linear conductor including two end portions and an overlapping portion in which the conductor is folded back and doubled up, wherein the overlapping portion is in a position between the two end portions along a length of the linear conductor, one of the two end portions being connected to one-phase coil of the three-phase coils, the other of the two end portions being connected to another-phase coil of the three-phase coils, and the overlapping portion being connected to the remaining-phase coil of the three-phase coils, wherein
an end portion of the overlapping portion in an axial direction of the stator includes a bent portion resulting from the conductor being folded back, the bent portion being positioned farther in the axial direction of the stator than the two end portions of the linear conductor, wherein an axial length of the overlapping portion is longer than an axial length of each of the two end portions.

2. The stator according to claim 1 , wherein the linear conductor is a flat member, having a rectangular cross-section.

3. A stator for a rotary electric machine, the stator comprising:
a stator core;
three-phase coils that are wound around the stator core; and
a neutral point connection conductor that is connected to each of the three-phase coils, the neutral point connection conductor including a single continuous linear conductor that is bent, the linear conductor including two end portions and an overlapping portion in which the conductor is folded back and doubled up, wherein the overlapping portion is in a position between the two end portions along a length of the linear conductor, one of the two end portions being connected to one-phase coil of the three-phase coils, the other of the two end portions being connected to another-phase coil of the three-phase coils, and the overlapping portion being connected to the remaining-phase coil of the three-phase coils, wherein
an end of the overlapping portion in an axial direction of the stator included a bent portion resulting from the conductor being folded back, the bent portion being positioned farther in the axial direction of the stator than the two end portions of the linear conductor, wherein the overlapping portion is folded back on itself so that a first part of the overlapping portion is disposed radially outward from a second part of the overlapping portion, the first part and the second part overlap in a radial direction.

4. The stator according to claim 3 , wherein the linear conductor is a flat member, having a rectangular cross-section.

Assignees

• Toyota Motor Co Ltd
• Denso Corp

Inventors

• Mizutani Tetsushi
• Kaneshige Keiichi
• Ikemoto Masayuki
• Hatakeyama Tsutomu
• Shichijoh Akiya

Classifications

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K3/50 Primary

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

• H02K3/12

  arranged in slots · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title