# US 8,541,921 B2 · Stator for motor

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- Number: US 8,541,921 B2
- Document ID: US8541921B2
- Status: Granted
- Kind: B2
- Application number: 13/395,510
- Filed: 2010-10-23
- Published: 2012-08-16
- Granted: 2013-09-24
- Earliest claimed: 2009-10-29
- Assignees: New Motech Co., Ltd.
- Applicants: Jeong Cheol Jang; Ji Min Lee
- Inventors: Jeong Cheol Jang; Ji Min Lee
- Web page: https://patentgrep.com/patent/US8541921B2

## CPC

- H02K 3/522: {for generally annular cores with salient poles}
- H02K 15/095: by laying conductors around salient poles
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

The present invention relates to a stator for a motor having a stator core having an annular back yoke and teeth protruded annularly in a radial direction from the back yoke, a plurality of coils adapted to be wound on the teeth, and an insulator adapted to cover the stator core and the coils for insulation and having supporting ends formed sequentially to have different heights so as to support the plurality of coils thereon, thereby preventing the plurality of coils from being in contact with one another and locking projections formed at both sides or one side of the supporting ends so as to prevent the coils from escaping from the supporting ends, wherein each of the supporting ends has a stepped groove formed at a position spaced apart by a predetermined distance from the locking projections so as to allow the nozzle of the coil winding machine to be accessed thereto, and a total of the depth of the stepped groove and the height of each of the locking projections is larger than the radius of the nozzle.

## Claims

### Claim 1

A stator for a motor having a stator core having an annular back yoke and teeth protruded annularly in a radial direction from the back yoke, a plurality of coils adapted to be wound on the teeth, and an insulator adapted to cover the stator core and the plurality of coils for insulation and having supporting ends and formed sequentially to have different heights so as to support the plurality of coils thereon, thereby preventing the plurality of coils from being in contact with one another and locking projections and formed at both sides or one side of the supporting ends and so as to prevent the plurality of coils from escaping from the supporting ends and,
wherein each of the supporting ends having the locking projections and having a height h smaller than a radius r of a nozzle N of a coil winding machine has a stepped groove formed at a position spaced apart by a predetermined distance from the locking projections and so as to allow the nozzle N of the coil winding machine to be accessed thereto, and a total of the depth d of the stepped groove and the height h of each of the locking projections and is larger than the radius r of the nozzle N.