Motor having interphase insulation sheet mounted thereon

Patent metadata

Field	Value
Publication number	US-10158266-B2
Application number	US-201715841587-A
Country	US
Kind code	B2
Filing date	Dec 14, 2017
Priority date	Dec 16, 2016
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

A motor includes: a stator core having a plurality of slots; and a winding inserted into the slot as distributed windings of three phases, wherein an interphase insulation sheet is mounted on a coil end of the winding. The interphase insulation sheet includes: planar insulating portions disposed so as to protrude from each of end surfaces of the stator core; a first leg portion and a second leg portion which integrally connect the planar insulating portions at the end surfaces and which are inserted into the slots; insulating convex portions that protrude toward an inner side in a radial direction of the stator core from the planar insulating portion; and a third leg portion that integrally connects the insulating convex portions at the end surfaces and which are inserted into the slot.

First claim

What is claimed is:

1. A motor having an interphase insulation sheet mounted thereon, comprising:
a stator core having a plurality of slots; and
a winding inserted into the slot as distributed windings of three phases, wherein
the interphase insulation sheet is mounted on a coil end of the winding, and
the interphase insulation sheet includes:
planar insulating portions disposed so as to protrude from each of end surfaces of the stator core;
insulating convex portions that protrude toward an inner side in a radial direction of the stator core from the planar insulating portions at the end surfaces;
a first leg portion and a second leg portion which integrally connect the planar insulating portions at the end surfaces and which are inserted into the slots; and
a third leg portion that integrally connects the insulating convex portions at the end surfaces and which are inserted into the slot.

2. The motor having the interphase insulation sheet mounted thereon according to claim 1 , wherein
a width along a circumferential direction of the stator core of each of the insulating convex portions on the sides close to each of the end surface is larger than a width of a single coil end of the winding.

3. The motor having the interphase insulation sheet mounted thereon according to claim 1 , wherein
the insulating convex portions of the interphase insulation sheet include convex surfaces substantially parallel to the planar insulating portions, left-side connecting surfaces that connect left-side edges of the convex surfaces and the planar insulating portions, and right-side connecting surfaces that connect right-side edges of the convex surfaces and the planar insulating portions, respectively, and
in the insulating convex portion at an end surface corresponding to an insertion side of the winding, notch portions are formed at corner portions, at the insertion side of the winding, of bent portions between the convex surface and the left-side connecting surface and between the convex surface the right-side connecting surfaces, respectively.

4. The motor having the interphase insulation sheet mounted thereon according to claim 1 , wherein
the first leg portion, the second leg portion, and the third leg portion have main leg surfaces substantially parallel to the planar insulating portions and the insulating convex portions, and left and right side surfaces protruding obliquely toward an inner side in a radial direction of the stator core from both left and right edges of the main leg surfaces, and
the left and right side surfaces are provided in regions excluding connection portions between the first leg portion and the planar insulating portion, connection portions between the second leg portion and the planar insulating portion, and connection portions between the third leg portion and the insulating convex portion at the end surfaces.

5. The motor having the interphase insulation sheet mounted thereon according to claim 4 , wherein
a width along a circumferential direction of the stator core of each of the main leg surfaces in the first leg portion, the second leg portion, and the third leg portion has such a size that the main leg surface passes through a width of an opening of the slot at an inner end in the radial direction of the stator core, and
an entire width of each of the first leg portion, the second leg portion, and the third leg portion in a state in which the left and right side surfaces protrude obliquely toward the inner side in the radial direction of the stator core from the main leg surfaces is larger than a width of each of the first leg portion, the second leg portion, and the third leg portion between left and right side walls of the slot when each of the first leg portion, the second leg portion, and the third leg portion is arranged inside of the slot to be in contact therewith and sandwiched there between.

Assignees

• Fanuc Corp

Inventors

• Mitsui Hidetoshi

Classifications

• H02K3/40

  for high voltage, e.g. affording protection against corona discharges · CPC title

• H02K3/345 Primary

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

• H02K3/32

  Windings characterised by the shape, form or construction of the insulation · CPC title

• H02K3/38 Primary

  around winding heads, equalising connectors, or connections thereto · CPC title