Stator of rotating electrical machine, and rotating electrical machine

Patent metadata

Field	Value
Publication number	US-10559992-B2
Application number	US-201615754424-A
Country	US
Kind code	B2
Filing date	Jul 29, 2016
Priority date	Sep 9, 2015
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

Provided is a stator provided with a high withstand voltage insulating system operable at a high drive voltage without increasing the thickness of a slot insulating paper, and a rotary electric machine incorporating the stator. A stator of a rotary electric machine according to the present invention includes a stator core in which a plurality of slots is formed, a stator coil to be inserted into the slot, and an insulating paper to be inserted into the slot, and insulating the stator coil and the stator core, wherein the insulating paper includes a first insulating paper portion arranged adjacent to the stator core at an outside of an end surface in an axial direction of the slot and at least a second insulating paper portion arranged between the first insulating paper portion and the stator coil, and the insulating paper forms a resin reservoir portion in which an insulating resin is arranged, between the first insulating paper portion and the second insulating paper portion.

First claim

The invention claimed is:

1. A stator of a rotary electric machine, the stator comprising:
a stator core in which a plurality of slots is formed;
a stator coil to be inserted into the slot; and
an insulating paper to be inserted into the slot, and insulating the stator coil and the stator core, wherein
the insulating paper includes a first insulating paper portion arranged adjacent to the stator core at an outside of an end surface in an axial direction of the slot and at least a second insulating paper portion arranged between the first insulating paper portion and the stator coil, and
the insulating paper forms a resin reservoir portion in which an insulating resin is arranged, between the first insulating paper portion and the second insulating paper portion, wherein a lowermost point of the resin reservoir is located outside of the stator core, such that the insulating resin in the resin reservoir is only disposed outside of the stator core.

2. The stator of a rotary electric machine according to claim 1 , wherein
an end portion in an axial direction of the second insulating paper portion is arranged closer to the stator coil than an end portion in an axial direction of the first insulating paper portion.

3. The stator of a rotary electric machine according to claim 1 , wherein
the resin reservoir portion includes a first resin reservoir portion in which a fixing varnish is arranged and a second resin reservoir portion formed on the first resin reservoir portion.

4. The stator of a rotary electric machine according to claim 1 , wherein
the first insulating paper portion and the second insulating paper portion include a bonded portion inside the slot.

5. The stator of a rotary electric machine according to claim 1 , wherein
the stator coil is configured from segment winding that configures one turn.

6. A rotary electric machine comprising:
the stator of a rotary electric machine according to claim 1 ; and
a rotor arranged to have a predetermined gap from the stator.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Iwaki Genzo

Classifications

• H02K1/16

  Stator cores with slots for windings · CPC title

• H02K3/345 Primary

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

• Y02T10/641

  Cross-Sectional Technologies · mapped topic

• Y02T10/64

  Electric machine technologies in electromobility · CPC title