# US 2014/0152135 A1 · Motor with variable magnet flux

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- Number: US 2014/0152135 A1
- Document ID: US20140152135A1
- Status: Published application
- Kind: A1
- Application number: 14/042,741
- Filed: 2013-10-01
- Published: 2014-06-05
- Earliest claimed: 2012-12-03
- Assignees: New Motech Co., Ltd.
- Applicants: New Motech Co., Ltd.
- Inventors: Jeong Cheol Jang; Je Hyung Seo; Soo Hyun Park; Woon Pil Jung; Hugh Jin Cho; Seung Jae Lee; Byung Taek Kim; Jin Seok Jang
- Web page: https://patentgrep.com/patent/US20140152135A1

## CPC

- H02K 1/2791: Surface mounted magnets; Inset magnets
- H02K 1/02: characterised by the magnetic material
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

Disclosed therein is a motor with a variable magnetic flux, which includes a rotor and a stator located inside the rotor. The rotor includes a rotor housing, a plurality of unit rotor cores and magnets which are attached to the inner wall surface of the rotor housing, and the unit rotor cores and the magnets are arranged in turn. The stator includes a stator core base and a plurality of teeth radially formed on the outer peripheral surface of the stator core base at equal intervals, and each of the teeth has ears formed at both sides of an end thereof.

## Claims

### Claim 1

A motor with a variable magnetic flux, which includes a rotor and a stator located inside the rotor,
wherein the rotor comprises a rotor housing, a plurality of unit rotor cores and magnets which are attached to the inner wall surface of the rotor housing, and the unit rotor cores and the magnets are arranged in turn, and
wherein the stator comprises a stator core base and a plurality of teeth radially formed on the outer peripheral surface of the stator core base at equal intervals, and each of the teeth has ears formed at both sides of an end thereof.

### Claim 2 (depends on 1)

The motor according to claim 1, wherein the magnets are divided into first magnets and second magnets,
wherein the second magnets are constituted of magnets located at both sides of a pair of opposed unit rotor cores and magnets located at both sides of a pair of unit rotor cores where a connection lines for connecting the two opposed unit rotor cores and a perpendicular line meet each other, and
wherein the first magnets are the remaining magnets except the second magnets and the second magnets occupy just a part of a space formed by two unit rotor cores of both sides thereof.

### Claim 3 (depends on 2)

The motor according to claim 2, wherein the first magnets are ferrite magnets and the second magnets are alnico magnets.

### Claim 4 (depends on 2)

The motor according to claim 2, wherein the spacers occupy the remaining space of the space formed by the neighboring unit rotor cores of the second magnets, except the space that the second magnets occupy.

### Claim 5 (depends on 2)

The motor according to claim 2, wherein the second magnets respectively have the width crossing the space formed by the two unit rotor cores of the both sides thereof so as to get in contact with the two unit rotor cores.