Dynamo-electric machine with stator having trapezoid shape segmented coil

Patent metadata

Field	Value
Publication number	US-10063117-B2
Application number	US-201615064008-A
Country	US
Kind code	B2
Filing date	Mar 8, 2016
Priority date	Mar 8, 2016
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

There is provided a dynamo-electric machine that can provide excellent insulating properties by downsizing coil ends. A dynamo-electric machine includes a stator and a rotator. The stator has a stator iron core formed with a plurality of slots arranged in a circumferential direction, and a stator coil inserted into the slots of the stator iron core. The rotator is rotatably disposed on the stator iron core with a predetermined gap. The stator coil is provided with an insulating film. The stator coil includes a main coil and a lead wire with an alternating current terminal. The main coil has a plurality of segment coils connected to one another. The segment coil is a conductor in a rectangular cross section formed in advance in a nearly U-shape. The lead wire is led from the slot. The tip end of the segment coil is formed in a trapezoid cross section.

First claim

What is claimed is:

1. A dynamo-electric machine comprising:
a stator having:
a stator iron core formed with a plurality of slots arranged in a circumferential direction, and
a stator coil inserted into the slots of the stator iron core, the stator coil being provided with an insulating film; and

a rotator rotatably disposed on the stator iron core with a predetermined gap,
wherein: in the stator coil, a plurality of segment coils are connected to one another, and each segment coil is a conductor having a rectangular cross section formed in advance in a nearly U-shape; and
in the plurality of segment coils, at least one segment coil has a tip end and a cross section of the tip end has a first side with a first width and a second side with a second width, the first side being opposed to the second side, wherein the first width of the first side is less than the second width of the second side, and
in the plurality of segment coils, at least one adjacent segment coil has a molten portion that is molten to form a connecting portion for the adjacent segment coil,
wherein the first side of the tip end touches the adjacent segment coil,
wherein a corner is formed on the second side of the tip end and is in non-contact with the molten portion, and
wherein the corner and the tip end are formed on a same plane.

2. The dynamo-electric machine according to claim 1 , wherein all sides of the cross section of the tip end are formed in a trapezoid shape.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Nakayama Kenichi

Classifications

• H02K3/12 Primary

  arranged in slots · CPC title

• H02K3/04

  Windings characterised by the conductor shape, form or construction, e.g. with bar conductors · CPC title

• H02K1/16

  Stator cores with slots for windings · CPC title

• H02K3/00

  Details of windings · CPC title

• H02K3/28

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