KR20170086903A - Motor apparatus and stator core thereof - Google Patents

Motor apparatus and stator core thereof Download PDF

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Publication number
KR20170086903A
KR20170086903A KR1020160006500A KR20160006500A KR20170086903A KR 20170086903 A KR20170086903 A KR 20170086903A KR 1020160006500 A KR1020160006500 A KR 1020160006500A KR 20160006500 A KR20160006500 A KR 20160006500A KR 20170086903 A KR20170086903 A KR 20170086903A
Authority
KR
South Korea
Prior art keywords
cooling
stator core
core
teeth
rotor
Prior art date
Application number
KR1020160006500A
Other languages
Korean (ko)
Inventor
김덕진
정호창
조수연
Original Assignee
자동차부품연구원
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 자동차부품연구원 filed Critical 자동차부품연구원
Priority to KR1020160006500A priority Critical patent/KR20170086903A/en
Publication of KR20170086903A publication Critical patent/KR20170086903A/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
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Abstract

A motor device and its stator core are disclosed. A motor device of the present invention includes: a rotor; A stator core disposed to surround the rotor, wherein a plurality of teeth are formed in a radial direction of the rotor, slots are formed between the teeth, and cooling grooves are formed to allow the cooling medium to flow therethrough; And a housing which is disposed so as to surround the stator core and in which a cooling channel portion communicating with the cooling groove portion is formed so as to allow the cooling medium to flow into the cooling groove portion.

Description

[0001] DESCRIPTION [0002] MOTOR APPARATUS AND STATOR CORE THEREOF [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor device and a stator core thereof, and more particularly, to a motor device and a stator core thereof capable of improving cooling performance.

Generally, the motor device includes a stator and a rotor. The motor device is divided into an inner rotor type and an outer rotor type according to the mounting position of the stator and the rotor. In the inner rotor type motor device, a rotor is rotatably installed inside the stator. In the outer rotor type motor device, a rotor is rotatably installed on the periphery of the stator.

As the motor device is driven, heat is generated in the stator. When the stator generates heat, the output density of the motor device may be lowered. Therefore, there is a need to improve this.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2015-0128154 (entitled "Motor Stator Assembly", published on Nov. 11, 2015).

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor device and a stator core thereof capable of improving cooling performance.

A motor device according to the present invention comprises: a rotor; A stator core disposed to surround the rotor, a plurality of teeth formed in a radial direction of the rotor, a slot formed between the teeth, and a cooling groove formed to allow the cooling medium to flow therethrough; And a housing that is disposed to surround the stator core and has a cooling channel portion communicating with the cooling groove portion to allow the cooling medium to flow into the cooling groove portion.

The plurality of cooling grooves may be formed to be recessed inward from the outer surface of the stator core.

The stator core includes: a plurality of first iron cores disposed to surround the rotor; And a plurality of second iron cores stacked between the first iron cores to form the cooling grooves.

The first iron core and the second iron core may be alternately stacked along the axial direction of the stator core.

The cooling groove portion may be formed on the outer side of the teeth to correspond to the teeth.

The cooling grooves may be arranged along the axial direction of the stator core.

The size of the cooling groove portion disposed at both axial end portions of the stator core may be larger than the size of the cooling groove portion disposed at the axial center portion of the stator core.

A stator core of a motor device according to the present invention comprises: a plurality of iron cores stacked, a plurality of teeth formed in a radial direction, slots formed between the teeth, and a plurality of And a cooling groove portion is formed.

The iron core includes a plurality of first iron cores disposed along the axial direction; And a plurality of second iron cores stacked between the first iron cores to form the cooling grooves.

The first iron core and the second iron core may be alternately stacked along the axial direction of the rotor.

The cooling groove portion may be formed on the outer side of the teeth to correspond to the teeth.

The cooling grooves may be arranged along the axial direction of the stator core.

The size of the cooling groove portion disposed at both axial end portions of the stator core may be larger than the size of the cooling groove portion disposed at the axial center portion of the stator core.

According to the present invention, since the cooling groove is formed in the stator core, the stator core can be cooled by the cooling medium flowing into the cooling groove. Therefore, the cooling performance of the stator can be improved.

According to the present invention, since the cooling passage portion of the housing communicates with the cooling groove portion, the stator core can be cooled as the fluid in the cooling passage portion flows into and out of the cooling groove portion.

Further, according to the present invention, since the cooling groove is recessed inward from the outer surface of the stator core, the cooling medium can flow into the stator core and heat exchange with the stator core can be achieved. In addition, the weight of the stator core can be reduced.

In addition, according to the present invention, since the second iron core, in which the cooling groove is formed, is laminated between the first iron cores, the first iron core and the second iron core can function as cooling fins by contacting the cooling medium.

1 is a perspective view showing a motor device according to an embodiment of the present invention.
2 is an exploded perspective view showing a state in which an iron core is disassembled in a motor device according to an embodiment of the present invention.
3 is a side view showing a motor device according to an embodiment of the present invention.
4 is a plan view showing a second iron core in which a cooling groove is formed in a motor device according to an embodiment of the present invention.
5 is an enlarged view showing a part of a second iron core in a motor device according to an embodiment of the present invention.

Hereinafter, an embodiment of a motor device according to the present invention will be described with reference to the accompanying drawings. In the course of describing the motor device, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a perspective view illustrating a motor device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view illustrating a state in which an iron core is disassembled in a motor device according to an embodiment of the present invention, FIG. 4 is a plan view showing a second iron core in which a cooling groove is formed in a motor device according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view of a motor device according to an embodiment of the present invention. Fig. 3 is an enlarged view showing a part of the second iron core in the motor device according to the example.

1 to 5, a motor device according to an embodiment of the present invention includes a rotor 110, a stator core 130, and a housing 150.

The rotor 110 is rotatably installed inside the stator core 130. The rotor 110 includes a rotor core 111 having a shaft at its center and a magnet 113 disposed along the circumferential direction of the rotor core 111. As the magnet 113, various types such as a permanent magnet and an electromagnet can be applied.

The stator 120 includes a stator core 130 and a coil 140. The stator core (130) is arranged to surround the rotor (110). A plurality of teeth 135 are formed in the stator core 130 in the radial direction of the rotor 110 and a slot 136 is formed between the teeth 135. The teeth 135 and the slots 136 are alternately arranged along the circumferential direction of the stator core 130. [ In the stator core (130), a cooling trench (133) is formed to allow the cooling medium to flow. Various types of cooling medium such as cooling water and insulation fluid can be applied.

A coil 140 having a rectangular cross section is press-fitted into the slot 136. [ Rectangles include squares, rectangles, isosceles, trapezoids, and parallelograms. Since the cross section of the coil 140 is formed in a rectangular shape, when the coil 140 is installed in the slot 136, the gap between the coils 140 is almost eliminated. Therefore, the amount of current can be increased as the degree of integration of the coil 140 in the slot 136 is increased, so that the output of the motor device can be increased. Also, since the cross-sectional area of the coil 140 in the slot 136 is increased, the electrical resistance in the coil 140 can be reduced. As the electric resistance in the coil 140 is reduced, the amount of heat generated by the coil 140 can be reduced.

Since the stator core 130 is cooled by the cooling medium flowing into the cooling groove 133, the cooling performance of the stator 120 can be improved. Since the cooling groove portion 133 is formed in the stator core 130, the area in contact with the cooling medium can be further increased. Thus, the output density of the motor device can be increased.

The housing 150 is disposed to surround the stator core 130. The housing 150 is provided with a cooling passage portion 153 communicating with the cooling groove portion 133 so that the cooling medium flows into the cooling groove portion 133. The cooling passage portion 153 is formed with an inlet portion (not shown) through which the cooling medium flows and a discharge portion (not shown) through which the cooling medium is discharged. The cooling channel portion 153 of the housing 150 is communicated with the cooling groove portion 133 so that the fluid of the cooling channel portion 153 can flow into and out of the cooling groove portion 133. Further, as the cooling medium flows into the cooling passage portion 153, the stator core 130 can be cooled.

A plurality of cooling grooves 133 are formed so as to be recessed inward from the outer surface of the stator core 130. The cooling groove portion 133 is recessed inward from the outer surface of the stator core 130 so that the cooling medium can flow from the inside of the stator core 130 by the cooling groove portion 133 and exchange heat with the stator core 130 . Since the cooling grooves 133 are formed in the stator core 130, the weight of the stator core 130 can be reduced.

The stator core 130 is made by stacking iron cores. The stator core 130 includes a plurality of first iron cores 131 arranged to surround the rotor 110 and a plurality of second iron cores 131 stacked between the first iron cores 131, (132). The first iron core 131 and the second iron core 132 are formed in a plate-like annular shape as a whole. The cooling core 133 is not formed in the first iron core 131. A plurality of cooling grooves 133 are formed in the second iron core 132 along the circumferential direction. The outer circumferential portion of the second iron core 132 may be cut to form the cooling groove portion 133. [ The cooling grooves 133 may be formed at regular intervals along the circumferential direction of the second iron core 132. An insulating layer (not shown) may be coated on the inner periphery of the cooling trench 133.

Since the second iron core 132 on which the cooling trench 133 is formed is stacked between the first iron cores 131, both sides of the cooling trench 133 of the second iron core 132 are surrounded by the first iron core 131 do. The first iron core 131 and the second iron core 132 come into contact with the cooling medium and function as cooling fins because the circumference of the cooling trench 133 is surrounded by the first iron core 131 and the second iron core 132 . Further, the cooling medium flowing into the cooling trench 133 can cool the first iron core 131 and the second iron core 132 at the same time. In addition, since the cooling groove 133 is formed in the second iron core 132, the weight of the stator core 130 can be reduced.

The cooling performance of the motor device can be controlled according to the lamination form of the first iron core 131 and the second iron core 132. [ The lamination of the first iron core 131 and the second iron core 132 will be described in detail.

The first iron core 131 and the second iron core 132 are alternately stacked along the axial direction of the stator core 130. Since the first iron core 131 is alternately stacked along the axial direction of the second iron core 132 and the stator core 130 in which the cooling trench 133 is formed, And may be arranged in a plurality of layers. Since the cooling grooves 133 are formed at equal intervals in the axial direction on the outer circumferential portion of the second iron core 132, the cooling grooves 133 can be evenly distributed on the outer circumferential portion of the stator core 130. Thus, the stator core 130 can be evenly cooled as a whole.

Further, one second iron core 132 may be stacked for each of the two or three first iron cores 131. The number of the cooling trenches 133 can be relatively reduced since the second iron core 132 in which the cooling trench 133 is formed is stacked for each of the two or three first iron cores 131. [ Therefore, the cooling performance of the motor device can be lowered.

In addition, the first iron core 131 may be stacked for each of the two or three second iron cores 132. Two or three second iron cores 132 on which the cooling grooves 133 are formed are adjacent to each other, so that the size and number of the cooling grooves 133 can be increased. Therefore, the cooling performance of the motor device can be improved.

The cooling groove portion 133 is formed outside the teeth 135 so as to correspond to the teeth 135. Since the cooling groove 133 is formed outside the tooth 135 so as to correspond to the tooth 135, the cooling groove 133 can be formed by avoiding the slot 136 and the tooth 135 where the rotating magnetic field is formed . It is possible to prevent the output density of the motor device from being lowered by the cooling trench portion 133 because the cooling trench portion 133 is formed outside the teeth 135 which are regions where there is no rotating magnetic field interference.

The cooling grooves 133 are arranged in parallel along the axial direction of the stator core 130. At this time, cooling grooves 133 having the same size are formed along the axial direction of the stator core 130. Since the cooling grooves 133 are arranged in parallel along the axial direction of the rotor 110, the stator core 130 can be uniformly cooled in the axial direction.

Meanwhile, the size of the cooling trench 133 may be gradually increased from the axial center of the stator core 130 to both axial ends of the stator core 130. At this time, as the width of the cooling groove 133 increases, the size of the cooling groove 133 can be increased. Therefore, since the cooling performance is relatively increased at both axial end portions of the stator core 130, the heat in the axial center portion of the stator core 130 can be released to the both end sides of the stator core 130 more quickly.

In addition, since the cooling performance at both side ends of the stator core 130 is increased, the cooling performance of the end coils (not shown) disposed at both side ends of the stator core 130 is improved. Accordingly, since the cooling performance of the end coil having the largest amount of heat generation in the stator 120 is improved, the output of the motor device can be improved.

Since the cooling groove 133 is formed in the stator core 130 as described above, the stator core 130 can be cooled by the cooling medium flowing into the cooling groove 133. Therefore, the cooling performance of the stator 120 can be improved.

Since the cooling channel portion 153 of the housing 150 is in communication with the cooling groove portion 133, the fluid in the cooling channel portion 153 flows into and out of the cooling groove portion 133 to cool the stator core 130 have.

Since the cooling groove 133 is recessed inward from the outer surface of the stator core 130, the cooling medium can flow into the stator core 130 to exchange heat with the stator core 130. In addition, the weight of the stator core 130 can be reduced.

Since the second iron core 132 on which the cooling groove 133 is formed is stacked between the first iron cores 131, the first iron core 131 and the second iron core 132 are brought into contact with the cooling medium, Function.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill 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. I will understand.

Accordingly, the true scope of protection of the present invention should be defined by the claims.

110: rotor 111: rotor core
113: Magnet 120: Stator
130: stator core 131: first iron core
132: second iron core 133: cooling groove
135: tooth 136: slot
140: coil 150: housing
153:

Claims (11)

Rotor;
A stator core disposed to surround the rotor, a plurality of teeth formed in a radial direction of the rotor, a slot formed between the teeth, and a cooling groove formed to allow the cooling medium to flow therethrough; And
And a housing which is disposed to surround the stator core and in which a cooling passage portion communicating with the cooling groove portion is formed to allow the cooling medium to flow into the cooling groove portion.
The method according to claim 1,
Wherein a plurality of the cooling grooves are formed so as to be recessed inward from an outer surface of the stator core.
3. The method of claim 2,
The stator core includes:
A plurality of first iron cores disposed to surround the rotor; And
And a plurality of second iron cores stacked between the first iron cores and in which the cooling grooves are formed.
The method of claim 3,
Wherein the first iron core and the second iron core are stacked alternately along the axial direction of the stator core.
The method of claim 3,
And the cooling groove portion is formed outside the teeth so as to correspond to the teeth.
The method of claim 3,
And the cooling groove portions are arranged in parallel along the axial direction of the stator core.
Wherein a plurality of cooling slots are formed in a radial direction and a plurality of teeth are formed in the radial direction, slots are formed between the teeth, Of the stator core.
8. The method of claim 7,
The iron core,
A plurality of first iron cores disposed along the axial direction; And
And a plurality of second iron cores stacked between the first iron cores and having the cooling grooves formed therein.
9. The method of claim 8,
Wherein the first iron core and the second iron core are stacked alternately along the axial direction of the rotor.
9. The method of claim 8,
And the cooling groove portion is formed on the outer side of the teeth so as to correspond to the teeth.
9. The method of claim 8,
Wherein the cooling grooves are arranged along the axial direction of the stator core.
KR1020160006500A 2016-01-19 2016-01-19 Motor apparatus and stator core thereof KR20170086903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160006500A KR20170086903A (en) 2016-01-19 2016-01-19 Motor apparatus and stator core thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160006500A KR20170086903A (en) 2016-01-19 2016-01-19 Motor apparatus and stator core thereof

Publications (1)

Publication Number Publication Date
KR20170086903A true KR20170086903A (en) 2017-07-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200102253A (en) 2019-02-21 2020-08-31 엘지전자 주식회사 Motor
KR20210060115A (en) 2019-11-18 2021-05-26 송과모터스 주식회사 Stator core construction for motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200102253A (en) 2019-02-21 2020-08-31 엘지전자 주식회사 Motor
KR20210060115A (en) 2019-11-18 2021-05-26 송과모터스 주식회사 Stator core construction for motor

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