# US 8,541,920 B2 · High density windings for a concentric wound electrical machine stator

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- Number: US 8,541,920 B2
- Document ID: US8541920B2
- Status: Granted
- Kind: B2
- Application number: 13/074,586
- Filed: 2011-03-29
- Published: 2011-09-29
- Granted: 2013-09-24
- Earliest claimed: 2010-03-29
- Assignees: Regal Beloit America, Inc.
- Applicants: Krishnan Ramu
- Inventors: Krishnan Ramu
- Web page: https://patentgrep.com/patent/US8541920B2

## CPC

- H02K 1/14: Stator cores with salient poles
- H02K 3/18: Windings for salient poles
- H02P 7/281: the DC motor being operated in four quadrants
- H02K 2213/03: Machines characterised by numerical values, ranges, mathematical expressions or similar information
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

## Abstract

A switched reluctance motor includes at least four stator poles and an electrically conductive material around each of the stator poles. The geometric outline, on one side of the stator pole, of at least one of the conductive materials is not rectangular, as viewed from a cross-section of the switched reluctance motor showing each of the stator poles.

## Claims

### Claim 1

A switched reluctance motor comprising:
four stator poles; and
an electrically conductive material around each of the stator poles, wherein:
for one of the conductive materials on one side of one of the stator poles, as viewed from a cross-section of the switched reluctance motor showing each of the stator poles;
the geometric outline is a rectangle with a rectangular portion of the rectangle absent,
both dimensions of the absent rectangular portion are smaller than both dimensions of the rectangle,
each dimension of the absent rectangular portion is parallel to a dimension of the rectangle, and
portions of two of the rectangles four edges constitute two edges of the absent rectangular portion.

### Claim 2 (depends on 1)

The switched reluctance motor of claim 1, wherein the geometric outline is the shape of the letter “L.”