KR20150000944A - Stator assembly for a motor - Google Patents

Stator assembly for a motor Download PDF

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Publication number
KR20150000944A
KR20150000944A KR1020130073183A KR20130073183A KR20150000944A KR 20150000944 A KR20150000944 A KR 20150000944A KR 1020130073183 A KR1020130073183 A KR 1020130073183A KR 20130073183 A KR20130073183 A KR 20130073183A KR 20150000944 A KR20150000944 A KR 20150000944A
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KR
South Korea
Prior art keywords
yoke portion
yoke
circumferential surface
extension
divided
Prior art date
Application number
KR1020130073183A
Other languages
Korean (ko)
Inventor
윤영복
석진수
안현택
백진욱
배한경
윤희수
Original Assignee
삼성전기주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020130073183A priority Critical patent/KR20150000944A/en
Publication of KR20150000944A publication Critical patent/KR20150000944A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

A plurality of divided cores having a curved yoke portion and a tooth portion protruding in a radial direction from an inner circumferential surface of the yoke portion; And a coil wound around the teeth of the split core. The yoke portion of the divided core according to the present invention includes a first extension portion protruding in the radial direction from the inner circumferential surface at one end of the yoke portion, And the second extending portion protruding in the radial direction from the inner peripheral surface at the other end of the portion, so that the contact area of the adjacently arranged divided cores can be widened.

Description

[0001] The present invention relates to a stator assembly for a motor,

The present invention relates to an electric motor stator assembly.

BACKGROUND ART An electric motor is an apparatus that converts electric energy into mechanical energy to provide a rotational force. The electric motor typically includes a stator that winds a coil and a rotor that includes a magnet. The rotor can be rotatably received inside the stator. That is, as is well known, the electric motor is rotated by the repulsive force and the attracting force generated by the polarity of the rotor and the polarity of the stator.

The motor (or motor) having such a structure is in fact developing a rotor and a stator of various shapes in order to pursue downsizing and lightening.

A stator employing such an electric motor is disclosed in Patent Document 1.

The stator assembly of the motor disclosed in Patent Document 1 has a stator composed of a plurality of divided pieces divided in the radial direction so as to divide a plurality of teeth into which the coils are wound. The stator assembly according to the prior art has an upper insulator and a lower insulator for engaging the respective split pieces, wherein the upper insulator and the lower insulator are mounted on the upper and lower sides of the plurality of divided pieces, respectively, .

Particularly, the stator assembly disclosed in Patent Document 1 must have respective tooth coupling portions in the upper and lower insulators so that the two divided teeth can be coupled with each other. The stator assembly having such a structure is disadvantageous in that it is inconvenient to arrange a plurality of divided pieces in a ring shape and to mount the upper and lower insulators on the upper and lower sides thereof, And a precise dimension is required for the toe coupling part of the toe coupling part and the toe coupling part of the lower insulator.

In this way, other measures to solve the above-mentioned problems should be considered.

Patent Document 1: Korean Patent Publication No. 10-2008-0081413

BRIEF SUMMARY OF THE INVENTION The present invention provides a stator assembly for a motor, which is created to solve the above-mentioned disadvantages, and which can guarantee a magnetic path between adjacently arranged divided cores while ensuring the binding of a plurality of divided cores.

In order to attain the above object, the present invention relates to a stator assembly for a motor having a plurality of divided cores, and more particularly, to a stator assembly for a motor having a plurality of divided cores, Wow; And a coil wound around the teeth of the split core.

In one embodiment of the present invention, the yoke portion of the divided core has a first enlarged portion protruding in the radial direction from the inner circumferential surface at one end portion of the yoke portion and a second enlarged portion protruding in the radial direction from the inner circumferential surface at the other end portion of the yoke portion , It is possible to widen the contact area between the ends of the adjacently arranged divided cores.

One end of the yoke portion has a coupling protrusion in the direction of curvature of the yoke portion, and the other end portion of the yoke portion in correspondence with the coupling protrusion has a coupling groove in the curved direction of the yoke portion. The plurality of adjacently arranged divided cores are arranged in a ring shape by being coupled to each other in a tight fitting manner of the engaging projections and the engaging grooves.

Optionally, the first extension and the second extension are formed in a right triangle shape.

The first expanding portion and the second expanding portion on the right triangle are arranged symmetrically with respect to the contact portion of the divided cores, for example, the air gap between one end of the divided core and the other end of the other divided cores, And the hypotenuse of the second extension portion face each other in opposite directions.

The tooth part can further apply an insulator to the outer circumferential surface of the tooth part.

Incidentally, the tooth portion extends long from the center of the inner peripheral surface of the yoke portion.

Each of the yoke portions of the plurality of divided cores curves at the same curvature to help the annular arrangement.

In another embodiment of the present invention, the first extending portion protrudes radially from the outer circumferential surface at one end of the yoke portion, and the second extending portion protrudes radially from the outer circumferential surface at the other end portion of the yoke portion.

The first expanding portion and the second expanding portion are formed in a right triangle shape so that the first expanding portion and the second expanding portion of the adjacently arranged divided cores are brought into close contact with each other to widen the contact area.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention as described above, the present invention provides a stator assembly for a motor that can be assembled into a plurality of divided cores in an annular shape.

The divided core according to the present invention can more easily wind the coil around the radially protruding tooth portion (salient pole) and is designed to mutually combine the respective divided cores in a fitting manner, thereby providing ease of assembly do.

Particularly, the divided core according to the present invention can improve the contact area at the boundary with other neighboring divided cores to ensure a reliable magnetic path. This reduces the magnetic resistance due to the air gap formed between the adjacent one divided core and the other divided cores, thereby reducing magnetic loss and improving the motor efficiency.

1 is a perspective view schematically showing a stator assembly for a motor according to a first embodiment of the present invention.
2 is a cross-sectional view of the stator assembly shown in FIG.
3 is a plan view of a segmented core constituting a stator assembly for a motor according to a first embodiment of the present invention.
4 is a cross-sectional view of a motor stator assembly according to a second embodiment of the present invention.

Now, an electric motor stator assembly according to the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages, features, and ways of accomplishing the same will become apparent from the following description of embodiments taken in conjunction with the accompanying drawings. In the specification, the same reference numerals denote the same or similar components throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 to 3 are schematic views of a stator assembly for a motor according to a first embodiment of the present invention.

The stator assembly 100 for a motor according to the first embodiment of the present invention comprises a plurality of divided cores 110. In particular, the stator assembly 100 winds the coils 130 onto the teeth 112 of the split core 110. The divided core according to the present invention will provide ease of assembly such as being able to more easily wind the coil 130 around the tooth portion 112. [

As shown in the drawings, the motor stator assembly 100 of the present invention includes a plurality of divided cores 110, which are curved at the same curvature, arranged in an annular shape, and a rotor (not shown) Respectively. Specifically, the split core 110 includes a curved yoke portion 111 and a tooth portion 112 projecting radially from the inner circumferential surface of the yoke portion 111. The tooth portion 112 is extended from the center of the inner peripheral surface of the yoke portion 111 toward the outside. 1 to 3 illustrate a stator of an inner rotor type electric motor. However, the present invention can be applied to a stator of an outer rotor type electric motor.

One end portion of the yoke portion 111 forms an engaging projection 111a in the curved direction of the yoke portion 111 and a second projection portion 111b protruding in the center direction from the inner peripheral surface of the yoke portion along the projecting direction of the tooth portion 112 And an extension portion 111c.

The other end portion of the yoke portion 111 forms the coupling groove 111b in the curved direction of the yoke portion 111 and protrudes in the center direction from the inner peripheral surface of the yoke portion along the projecting direction of the tooth portion 112 And a second enlarged portion 111d.

One end of the yoke portion 111 comes into contact with the other end portion of the other yoke portion 111 to be disposed adjacent to the yoke portion 111. The coupling protrusion 111a provided at one end portion of the yoke portion 111 contacts the other yoke portion 111, And can be inserted and fixed in the coupling groove 111b provided at the other end of the base plate 111a.

One end portion of the yoke portion 111 abuts against the other end portion of the other yoke portion 111 through this assembly so that the first extension portion 111c of the yoke portion 111 is engaged with the other end portion of the other yoke portion 111 And will be close to the second extension 111d.

As is well known to those skilled in the art, the magnetic flux generated by applying a current to the coil is divided at the tooth portion 112 and flows to the adjacent tooth portion through the salient pole of the inner rotor (not shown). At this time, the yoke 111 forms a magnetic path of the stator assembly 100.

However, the stator assembly 100 according to the present invention is constituted by a plurality of divided cores as described above, and can not but form a discrete magnetic path. Particularly, one end of the divided core 110 is connected to the divided core 110 so as to reduce the resistance of a magnetic circuit that may be generated in an air gap between the other ends of adjacent adjacent divided cores 110. [ It is possible to improve the contact area between the one end of the other divided core 110 and the other end of the adjacent adjacent divided cores 110, thereby reducing the magnetic resistance and minimizing the magnetic loss due to the air gap.

Accordingly, in order to closely contact the first extension 111c provided at one end of the yoke 111 and the second extension 111d provided at the other end of the adjacent yoke 111, It is preferable that the first extension portion 111c and the second extension portion 111d are formed to correspond to each other.

In particular, the first extension 111c is formed in a right triangle shape, and the second extension 111d is also formed in a right triangle shape. The hypotenuse of the second expansion portion 111d and the hypotenuse of the first expansion portion 111c are mutually opposite to each other with respect to the air gap in the second expansion portion 111d and the first expansion portion 111c, Look at the direction.

The first extension portion 111c of the yoke portion 111 and the second extension portion 111d of the other yoke portion 111 are engaged with the coupling protrusion 111a of the yoke portion 111 and the coupling groove 111b of the other yoke portion 111, The tooth part 112 protrudes into the slot 120 formed by the tooth part 112 adjacent to the tooth part 112 as shown in FIG. 2, and the tooth part 112, which is adjacent to the tooth part 112, (112).

The stator assembly 100 of the present invention also includes an insulator 140 coated on an outer circumferential surface of a plurality of annularly arranged tooth portions 112 to prevent electrical interference with adjacent adjacent tooth portions 112, Thereby providing sufficient insulation with the coil 130 wound on the portion 112. Additionally, the insulator 140 may also function as a corrosion resistant layer to prevent corrosion of the stator assembly 100 according to the present invention, including the teeth portion 112.

Preferably, the divided cores 110 according to the present invention may be formed by laminating a plurality of thin steel sheets.

4 is a cross-sectional view of a motor stator assembly according to a second embodiment of the present invention. Since the motor stator assembly 100 shown in FIG. 4 is of a very similar construction except for the arrangement of the extensions of the stator assemblies shown in FIGS. 1-3, it should be understood that similar or similar The description of the same component will be omitted here.

The stator assembly 100 for a motor according to the second embodiment of the present invention has a plurality of divided cores 110 bent in the same curvature and arranged in an annular shape. The split core 110 has a curved yoke portion 111 and a tooth portion 112 protruding radially from the inner circumferential surface of the yoke portion 111. The tooth portion 112 extends from the center of the inner circumferential surface of the yoke portion 111 toward the outside, and the plurality of divided cores 110, which are arranged in an annular shape as a whole, do.

Referring to the drawing, one end of the yoke 111 has a first extension 111c 'protruding radially from the outer circumferential surface of the yoke 111 to the outside. Correspondingly, the other end of the yoke 111 has a second extension 111d 'projecting in the radial direction from the outer circumferential surface of the yoke 111.

The split core 110 is formed by fitting the coupling grooves 111b of the yoke portion 111 of the other divided core 110 to be arranged adjacent to the coupling protrusions 111a of the yoke portion 111, ) Are combined and arranged in a ring shape. The first extended portion 111c 'of the divided core 110 is brought into close contact with the second extended portion 111d' of the other divided core 110 so that one end of the divided core 110 and the other divided core 110 It is possible to expand the contact area between the end portions.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. It is evident that the person skilled in the art can change or improve it.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100 ----- stator assembly 110 ----- split core
111 ----- yoke portion 112 ----- tooth portion
111a ----- coupling projections 111b ----- coupling grooves
111c and 111c '----- first extension portions 111d and 111d' -----
120 ----- Slot 130 ----- coil
140 ----- Insulator

Claims (11)

A plurality of divided cores having a curved yoke portion and a tooth portion protruding in a radial direction from an inner circumferential surface of the yoke portion;
And a coil wound around the teeth of the split core,
Wherein the yoke portion of the divided core has a first enlarged portion protruding radially from the inner circumferential surface of the yoke portion and a second enlarged portion protruding radially from the inner circumferential surface at the other end portion of the yoke portion.
The method according to claim 1,
And one end of the yoke portion has a coupling protrusion in a curved direction of the yoke portion.
The method of claim 2,
And the other end of the yoke portion has an engaging groove in a curved direction of the yoke portion corresponding to the engaging projection.
The method according to claim 1,
Wherein the first and second extensions are formed in a right triangle shape.
The method of claim 4,
Wherein the first extension and the second extension are symmetrically disposed such that the hypotenuse of the first extension and the hypotenuse of the second extension face each other in opposite directions.
The method according to claim 1,
Wherein the first extension portion is protruded in a radial direction from the outer circumferential surface toward the outside at one end of the yoke portion,
And the second extending portion protrudes radially outward from the outer circumferential surface at the other end of the yoke portion.
The method of claim 6,
Wherein the first and second extensions are formed in a right triangle shape.
The method according to claim 1,
Wherein the tooth portion further applies an insulator to an outer circumferential surface of the tooth portion.
The method according to claim 1,
And the tooth portion extends long from the center of the inner peripheral surface of the yoke portion.
The method according to claim 1,
Wherein the plurality of divided cores can be arranged in a ring shape via the engaging projections and the engaging grooves.
The method according to claim 1,
Wherein each yoke portion of the plurality of divided cores is curved at the same curvature.
KR1020130073183A 2013-06-25 2013-06-25 Stator assembly for a motor KR20150000944A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130073183A KR20150000944A (en) 2013-06-25 2013-06-25 Stator assembly for a motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130073183A KR20150000944A (en) 2013-06-25 2013-06-25 Stator assembly for a motor

Publications (1)

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KR20150000944A true KR20150000944A (en) 2015-01-06

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KR1020130073183A KR20150000944A (en) 2013-06-25 2013-06-25 Stator assembly for a motor

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108667167A (en) * 2018-06-15 2018-10-16 珠海格力电器股份有限公司 A kind of assembling method of stator core, stator module, motor and stator core
WO2018199606A1 (en) * 2017-04-25 2018-11-01 엘지이노텍 주식회사 Sensing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199606A1 (en) * 2017-04-25 2018-11-01 엘지이노텍 주식회사 Sensing device
US11258336B2 (en) 2017-04-25 2022-02-22 Lg Innotek Co., Ltd. Sensing device having a stator having a stator ring with protrusions to be secured to a stator holder
CN108667167A (en) * 2018-06-15 2018-10-16 珠海格力电器股份有限公司 A kind of assembling method of stator core, stator module, motor and stator core

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