KR101702023B1 - A Electric motor Cooling System - Google Patents

A Electric motor Cooling System Download PDF

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Publication number
KR101702023B1
KR101702023B1 KR1020160033166A KR20160033166A KR101702023B1 KR 101702023 B1 KR101702023 B1 KR 101702023B1 KR 1020160033166 A KR1020160033166 A KR 1020160033166A KR 20160033166 A KR20160033166 A KR 20160033166A KR 101702023 B1 KR101702023 B1 KR 101702023B1
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KR
South Korea
Prior art keywords
flow path
housing
rotor
stator
wall
Prior art date
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KR1020160033166A
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Korean (ko)
Inventor
김태훈
Original Assignee
동림산업(주)
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Priority to KR1020160033166A priority Critical patent/KR101702023B1/en
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Publication of KR101702023B1 publication Critical patent/KR101702023B1/en

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    • 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
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The present invention relates to an electric motor cooling system which comprises: a housing formed in a cylindrical shape, and including an internal space formed as front and rear sides are penetrated; a first cover part shielding the front side of the housing; a second cover part shielding the rear side of the housing; a rotor rotated by penetrating the housing and the first and second cover parts; and a stator fixed to the inner wall of the housing while surrounding the rotor to form a rotating field between the rotor and the stator by winding a coil to receive power around the stator. Each passage is sequentially formed on the inner wall of the housing to be parallel to the rotor. Air in the stator and rotor flows in one passage, and outer air flows in the remaining passages.

Description

[0001] The present invention relates to an electric motor cooling system,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric motor, and more particularly, to an electric motor cooling system capable of more effectively cooling a housing and a stator of an electric motor.

Generally, electric motors are widely used in machine tools and general industrial machinery, and the structure of the electric motor is composed of a stator, a rotor, and other structural parts.

The stator is fixed to the housing so as to be unable to move so as to withstand vibration, and the rotor is supported by a shaft and a bearing so as to rotate smoothly.

The stator is generally fixed to the housing by means of heat shrinking or by a set pin or the like. Heat generated in the coils of the stator is conducted to the entire motor and is conducted to the bearings, thereby affecting the service life of the motor due to the evaporation of the grease.

Therefore, in most motors, a fluid cooling method of applying an air-cooling fan or cooling the cooling fan is applied to cool the heat generated by the stator.

In forming the flow path for moving the air inside the motor, it is difficult to form the flow path by forming the flow path by arbitrarily forming the holes to flow the air to the stator core, and the flow path is formed in the core, A problem occurs.

Patent No. 10-1098841

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an electric motor cooling system in which a flow path can be assembled easily without affecting the stator core.

In order to achieve the above object, the present invention provides an electric motor cooling system comprising: a housing formed in a columnar shape and passing through front and rear to form a space therein; a first cover portion that shields a front surface of the housing; A second cover portion that shields the rear surface of the housing; a rotor rotatable through the housing and the first cover portion and the second cover portion; and a coil that is supplied with power and is wound between the rotors And a stator fixed to an inner wall of the housing while enclosing the rotor to form an electromagnetic field, wherein two flow paths are formed in an inner wall of the housing, and one of the flow paths includes an inner portion between the rotor and the stator And the remaining second flow path is characterized in that external air flows.
Wherein the first flow path includes a first flow path forming a space between the stator and the rotor, a second flow path formed along the length of the housing in a groove shape on the inner side wall of the housing, 1 < / RTI > cover formed in the cover portion and extending to the first-first flow path and guiding air to flow to the first-second flow path, And a first-fourth flow path for guiding air flow between the first-first flow paths, wherein a first fan is provided in the first-third flow path, and the first fan is driven by the first fan, And guiding the heated air between the rotor and the stator in the first flow path to the first-third flow path, the first-second flow path, the first-fourth flow path and the first-type flow path, 2, and a second space in which a space is formed by being separated from the first-fourth flow path, and an inlet port through which external air flows, A second-2 flow path formed at an inner side wall of the housing along a longitudinal direction of the housing and having one end communicated with the second-1 flow path; And a second passage communicating with the other end of the second passage and having an outlet communicating with the outside, the second passage being formed with a second fan, Through the inlet port, and the air passes through the second-1, second-2, and second-3 flow paths, and air is discharged to the outside through the outlet.
The first-second flow path, the second-second flow path, the first-second flow path, and the second-second flow path are connected to the inner wall of the housing with a partition wall therebetween. Are formed in this order.
And the first-second flow path and the second-second flow path are formed in a spiral shape in the housing.
The first-second flow path is formed in a groove shape on the inner wall of the housing, and the second-2 flow path is formed to penetrate the inner wall of the housing.

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The motor cooling system according to the present invention has the following effects.

An inner wall of the housing constituting the electric motor is formed with a flow path through which air flows and a flow path through which air flows from the outside is formed as a through hole so as not to affect the shape of the cylindrical shape in the stator structure have.

In addition, there is an effect that a flow path in which air flows inside and a flow path in which outside air flows are formed in order, and the flow paths are formed in a spiral shape, thereby maximizing the heat exchange efficiency by maximizing the heat and one area and heat exchange time .

1 is a cross-sectional view showing an internal cooling flow of an electric motor according to the present invention.
2 is a cross-sectional view showing an external cooling flow of an electric motor according to the present invention;
3 is a longitudinal sectional view showing a housing structure of an electric motor according to the present invention.

Hereinafter, preferred embodiments of the motor cooling system according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the motor cooling system of the present invention includes a housing 10 formed in a columnar shape and having front and rear portions penetrated to form a space therein, a first cover portion (not shown) for shielding the front surface of the housing 10 A second cover part 30 which shields the rear surface of the housing 10 and a second cover part 30 which is rotatable through the housing 10 and the first cover part 20 and the second cover part 30, A stator (50) fixed to the inner wall of the housing (10) while enclosing the rotor (40) so as to form a rotating system between the rotor (40) ). ≪ / RTI >

First, a housing 10 is provided in an electric motor cooling system of the present invention. As shown in FIG. 1, the housing 10 has a columnar shape and a space formed therein, and the front and rear pass through the housing 10.

A first cover part 20 is provided on the front surface of the housing 10. The first cover portion 20 shields the front surface of the housing 10 and supports the shaft of the rotor 40 so as to be rotatable.

A second cover 30 is provided on the rear surface of the housing 10. The second cover 30 shields the rear surface of the housing 10 and supports the shaft of the rotor 40 so as to be rotatable.

A rotor (40) is provided inside the housing (10). The rotor 40 is disposed along the axial direction and is rotatably supported by the bearings provided on the front and rear cover parts 20, The rotor 40 includes a rotating shaft and a rotor iron core surrounding the rotating shaft. Preferably, rotor cores each functioning as a yoke are provided on the upper and lower ends of the outer side of the rotor iron core to efficiently form the rotor system.

An induction current flows through the secondary conductor provided in the rotor iron core by the rotor system of the stator 50. By the interaction of the induction current generated in the rotor 40 and the rotor system of the stator, A rotational force is generated in the direction.

In addition, a permanent magnet may be provided on the outer side of the rotor core, and a separate electric power may be supplied through a brush instead of the permanent magnet to form a rotating system between the permanent magnet and the stator 50.

A stator (50) is provided between the rotor (40) and the housing (10). The stator 50 is wound with a coil supplied with power to form a rotating system between the stator 50 and the rotor 40 so as to surround the outer circumference of the rotor 40. The stator 50 preferably includes a stator iron core formed by stacking silicon steel plates and a coil wound around a plurality of bobbins protruding inwardly at predetermined angular intervals along the circumferential direction on the inner periphery of the stator iron core.

If a rotor system is generated at a portion where the rotor 40 and the stator 50 face each other and the rotor 40 is rotated as described above, the motor according to the present invention is not limited to the induction motor, A brushless motor (BLDC motor) or a DC brush motor in which a magnet is provided in a rotor, and the like.

The housing 10 is provided with a first flow path through which the inside air flows and a second flow path through which the outside air flows.

As shown in FIG. 1, the first flow path includes a first-first flow path 62 as a space between the stator 50 and the rotor 40, A first and a second flow paths 64 and 64 formed along the length of the housing 10 and extending from the first cover part 20 to the first flow path 62, And a second flow path 62 formed in the second cover portion 30 for guiding the air to flow to the first flow path 62 and the first flow path 62 And a first fan 69 is provided in the first-third flow path 66. The first fan 69 is provided in the first-first flow path 62, The first air flow path 62 may be configured to move along the first-first flow path 62, the first-third flow path 66, the first-second flow path 64, and the first-fourth flow path 68.

A first flow path (62) is provided between the stator (50) and the rotor (40). The highest-temperature air is formed in the first-first flow path 62 by the heat generated between the stator 50 and the rotor 40.

A first-second flow path 64 is provided on a side wall of the housing 10. The first-second flow path 64 is formed along the longitudinal direction in a groove shape on the inner wall of the housing 10. The first-second flow path 64 is formed as a space defined by the groove of the inner wall of the housing 10 and the core of the stator 50.

The first cover part (20) is provided with a first-third flow path (66). The first-first flow path (66) communicates the first-first flow path (62) and the 1-2 flow path (64).

In addition, the first fan 69 may be further provided on the first-third flow path 66. The first fan 69 is configured such that the hot air of the first-first flow path 62 flows through the first-first flow path 62, the first-third flow path 66, the first- And serves to provide power to move from 1-4 to 68 (68).

The second cover portion 30 is provided with a first-fourth flow path 68. The first-fourth flow path 68 communicates the first-third flow path 66 and the first-first flow path 62 to guide the air to flow.

As shown in FIG. 2, the second flow path is formed in the second cover portion 30 by being separated from the first-fourth flow path 68, and an inlet port (72) having a first end and a second end; a second-1 flow path (72) provided with a first passage (71) A second 2-2 flow path 74 and a discharge port formed to penetrate the edge of the first cover part 20 and having one end communicated with the other end of the 2-2 flow path 74 and the other end communicating with the outside And a second fan 79 is formed in the second-1 flow path 72 to allow external air to flow through the inlet 71 The second-first flow path 72, the second-second flow path 74, the second-third flow path 76, and the discharge port 78. The first-

The second cover part (30) is provided with a second-1 flow path (72). The second-1 flow path 72 is formed in the second cover part 30 so as to be separated from the first-fourth flow path 68, An inlet 71 is provided so as to be able to flow into the reaction chamber.

In addition, a second fan 79 is provided in the second-1 flow path 72. The second fan 79 is arranged so that the external cold air flows through the inlet 71, the second-first flow path 72, the second-second flow path 74, the second- So as to be able to be moved through the motor.

A second-2 flow path (74) is provided on the inner wall of the housing (10). The second-2 flow path 74 may be configured to penetrate the inner wall of the housing 10. As in the case of the first-second flow path 64, a groove may be formed in the inner wall of the housing 10, and a space may be formed by the stator core. However, It is preferable to penetrate through the inner wall of the housing 10 in order to prevent the flow of the fluid.

A second passage (76) is formed in the first cover part (20). The second through-flow path (76) is formed so as to pass through the edge of the first cover portion (20) and has one end communicated with the other end of the second 2-flow path (74) (78) may be formed.

The first-second flow path 64 and the second-second flow path 74 may have a spiral shape on the inner wall of the housing 10. That is, this is to lengthen the path through which the air moves, thereby widening the heat exchange time and area. Of course, any structure can be applied as long as the flow paths are not helical, but can extend the path.

As shown in FIG. 3, the first-second flow path 64 and the second-second flow path 74 are partitioned by a partition wall, and heat exchange is performed through the partition wall. That is, the heated air inside the first-second flow path 64 flows and the external cold air flows through the second-second flow path 74, thereby performing heat exchange through the partition wall.

The first-second flow path 64 and the second-second flow path 74 may be formed in plural numbers, and may be formed in order as shown in FIG. This is to ensure efficient heat exchange. In addition, the air moving along the first flow path and the air moving along the second flow path may move in opposite directions.

Hereinafter, the operation of the motor cooling system according to the present invention will be described in detail.

When the electric power is supplied to the motor and the motor is driven, power is also applied to the first fan 69 and the second fan 79 to rotate the fans. When the first fan 69 rotates, hot air in the first-first flow path 62 moves to the first-second flow path 64 through the first-third flow path 66.

On the other hand, when the second fan 79 rotates, cold air from the outside flows through the inlet 71 of the second-1 flow path 72 and flows into the second- To the two flow paths 74.

The high-temperature air inside the first-second flow path (64) and the low-temperature air inside the second-second flow path (74) exchange heat with each other, so that the hot air inside the first- And is guided to the first-first flow path 62 through the first-fourth flow path 68. The first-

The low-temperature air in the second-2 flow path 74 is heat-exchanged with the high-temperature air in the first-second flow path 64, so that the low-temperature air inside the second- Is relatively converted into high-temperature air, and is discharged to the outside through the second-third flow path (76) and the discharge port (78).

It is to be understood that the invention is not limited to the embodiments described above but is defined by the scope of the appended claims and that various changes and modifications can be made by those skilled in the art without departing from the scope of the appended claims. It is self-evident.

10: housing 12: through-hole
20: first cover part 30: second cover part
32: Through hole 40: Rotor
50: stator 62:
64: 1-2 Euro 66: 1-3 Euro
68: No. 1-4 Euro 69: 1st fan
71: Inlet port 72:
74: 2-2 Euro 76: 2-3 Euro
78: Outlet

Claims (5)

A housing formed in a columnar shape and having front and rear portions penetrated to form a space therein;
A first cover portion that shields a front surface of the housing;
A second cover portion that shields the rear surface of the housing;
A rotor rotatable through the housing, the first cover part and the second cover part;
And a stator wound around the coil to be supplied with power and fixed to the inner wall of the housing while enclosing the rotor to form a rotating system between the coil and the rotor,
Wherein two passages are formed in the inner wall of the housing and one of the passages is configured such that air in the space between the rotor and the stator flows and the outside air flows through the remaining passages ,
Wherein the first flow path includes:
A first-first flow path forming a space between the stator and the rotor;
A first-second flow path formed along a length of the housing in a groove shape on a side wall of the housing;
A first-third flow path formed in the first cover portion and extending from the first-first flow path to guide air to flow into the first-second flow path;
And a first to fourth flow path formed in the second cover portion and guiding air to flow between the first-third flow path and the first-first flow path,
The first fan is provided in the first-third flow path, and the air heated between the rotor and the stator in the first-first flow path by the first fan is flowed into the first- The first to eighth, and the first to eighth,
Wherein the second flow path
The second cover is provided with a space separated from the first-fourth flow path and provided with an inlet through which external air flows;
A second 2-flow path formed in the housing inner wall along the longitudinal direction of the housing and having one end communicated with the second-1-flow path;
And a second flow passage formed to penetrate an edge of the first cover portion and having an end communicated with the other end of the second-2 flow path at one end and an outlet communicating with the other end at the other end,
And a second fan is formed in the second-1 channel, and external air is introduced through the inlet by driving the second fan, and the second-1 channel, the second channel-2, and the second- 3, and air is discharged to the outside through the outlet.
The first and second flow paths and the second flow path are formed on the inner wall of the housing along the rim with a partition wall therebetween, and the first, second, third, and second flow paths, And the second direction is different from the second direction in the moving direction of the fluid.
And wherein the first-second flow path and the second-second flow path are formed in a spiral shape in the housing. delete delete delete The method according to claim 1,
Wherein the first-second flow path is formed in a groove shape on an inner wall of the housing, and the second-2 flow path is formed to penetrate the inner wall of the housing.
KR1020160033166A 2016-03-21 2016-03-21 A Electric motor Cooling System KR101702023B1 (en)

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KR1020160033166A KR101702023B1 (en) 2016-03-21 2016-03-21 A Electric motor Cooling System

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230077986A (en) 2021-11-26 2023-06-02 현대로템 주식회사 A closed traction motor for railway vehicles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101098841B1 (en) 2010-06-14 2011-12-26 박병섭 Electric motor having complex cooling casing
JP2015208101A (en) * 2014-04-18 2015-11-19 株式会社三井三池製作所 Squirrel-cage motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101098841B1 (en) 2010-06-14 2011-12-26 박병섭 Electric motor having complex cooling casing
JP2015208101A (en) * 2014-04-18 2015-11-19 株式会社三井三池製作所 Squirrel-cage motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230077986A (en) 2021-11-26 2023-06-02 현대로템 주식회사 A closed traction motor for railway vehicles

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