KR20170095611A

KR20170095611A - Motor

Info

Publication number: KR20170095611A
Application number: KR1020160017250A
Authority: KR
Inventors: 구현; 박승영; 이충성
Original assignee: 주식회사 만도
Priority date: 2016-02-15
Filing date: 2016-02-15
Publication date: 2017-08-23
Also published as: KR101842760B1

Abstract

An embodiment of the present invention provides a motor equipped with a cooling fan, comprising: a housing; a rotor disposed inside the housing; a motor shaft fixedly coupled to the rotor; an electromagnet disposed on one side of the rotor and fixedly coupled to the motor shaft; and the cooling fan disposed on one side of the electromagnet and coupled to the motor shaft through a fan bearing so as to rotate separately around the motor shaft when the power of the electromagnet is applied. Accordingly, the present invention can easily discharge heat generated inside the motor by the cooling fan.

Description

[0001] The present invention relates to a motor having a cooling fan,

The present invention relates to a motor, and more particularly, to a motor for improving heat radiation performance.

Generally, an electric motor is provided with a stator inside the housing, and a rotor is provided inside the stator so as to correspond to the inside of the stator. In the inside of the rotor, a magnetic field generated between the stator and the rotor can be rotated together with the rotor The motor shaft is coupled.

The above-described electric motor may cause malfunction or malfunction of the components when heat is not generated or excessive heat is generated during driving.

1, a cooling fan 30, which rotates integrally with the rotor, is provided on one side or both sides of the rotor 10 to cool the internal rotor 10 and the stator. When the motor shaft 20 rotates, the rotor 10 and the cooling fan 30 are rotated integrally to discharge heat to the outside, thereby taking an air cooling system for internal heat generation.

However, due to the characteristics of the cooling fan 30 integrated with the rotor 10, the conventional motor can not control the speed of the cooling fan 30 according to the degree of heat generated by the motor. For example, when excessive heat is generated, the required heat dissipation performance can not be achieved if the rotation speed of the motor is low, and when the rotation speed of the rotor is fast, There is a problem of reducing the efficiency of the system due to the load.

Korean Patent Publication No. 10-2004-0059944

The present invention provides a motor provided with a cooling fan that can easily dissipate heat generated inside a motor by a cooling fan that rotates separately from the motor shaft.

The objects of the present invention are not limited to those described above, and other objects and advantages of the present invention which are not mentioned can be understood by the following description.

According to an embodiment of the present invention, a motor having a cooling fan includes a housing; A rotor disposed inside the housing; A motor shaft fixedly coupled to the rotor; An electromagnet disposed at one side of the rotor and fixedly coupled to the motor shaft; And a cooling fan disposed on one side of the electromagnet and coupled to the motor shaft through a fan bearing so as to rotate separately from the motor shaft when the electromagnet is powered on.

In one embodiment, the housing may include a front housing and a rear housing.

In one embodiment, one end and the other end of the motor shaft may be coupled to the front housing and the rear housing via a front bearing and a rear bearing, respectively.

In one embodiment, the cooling fan may include a fan body disposed on one side of the electromagnet, and vanes protruding outwardly from both sides of the fan body.

In one embodiment, a plurality of guide protrusions made of a magnetic material may be provided on one surface of the fan body facing the electromagnet.

According to the embodiment of the present invention, the heat generated inside the motor can be easily released by the cooling fan rotating separately from the motor shaft via the electromagnet and the fan bearing.

Also, according to the embodiment of the present invention, cooling air is supplied to both the inside of the motor and the peripheral structure provided at the rear of the motor by providing wings on both sides of the cooling fan, thereby improving the heat radiation performance.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a perspective view showing a motor according to the prior art.
2 is a cross-sectional view illustrating a motor according to an embodiment of the present invention.
3 is a front view showing a cooling fan applied to a motor according to an embodiment of the present invention.
4 is a perspective view illustrating a cooling fan applied to a motor according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view illustrating a motor provided with a cooling fan 160 according to an embodiment of the present invention. FIG. 3 is a front view showing a cooling fan 160 applied to a motor according to an embodiment of the present invention. And FIG. 4 is a perspective view illustrating a cooling fan 160 applied to a motor according to an embodiment of the present invention.

Referring to FIG. 2, the motor 100 according to an embodiment includes a housing 110, a stator 120, a rotor 130, a motor shaft 140, an electromagnet 150, a cooling fan 160, Bearing.

The housing 110 has a receiving space for accommodating the stator 120, the rotor 130, the electromagnet 150, and the cooling fan 160 therein. The housing 110 can be divided into a front housing 111 positioned at the front and a rear housing 112 positioned at the rear. The motor shaft 140 is disposed at the center of the front housing 111 and the rear housing 112, A shaft hole is formed. Referring to Fig. 2, the left side can be divided into the front side and the right side of the motor to the rear side of the motor.

When the housing is divided into the front housing 111 and the rear housing 112 as in the embodiment, the stator 120 may be provided inside the housing such that the front housing 111 and the rear housing 112 are partially exposed. Or may be coupled to the rear housing 112.

The rotor 130 may be disposed inside the stator 120 and may generate a rotational force by interaction with the magnetic field formed by the stator 120. A shaft hole is formed at the center of the rotor 130 so that the motor shaft 140 is engaged. The motor shaft 140 may be fixedly coupled to the shaft hole of the rotor 130 by press fitting or the like.

The motor shaft 140 is fixedly coupled to the shaft hole of the rotor 130 and rotates integrally with the rotor 130 due to a magnetic field generated between the stator 120 and the rotor 130. One end and the other end of the motor shaft 140 are coupled to the front housing 111 and the rear housing 112 via the front bearings 141 and the rear bearings 142, respectively.

The electromagnet 150 is fixedly coupled to the motor shaft 140 so as to be positioned at one side of the rotor 130. The electromagnet 150 is formed in a disk shape, and a shaft hole 150a is formed at the center thereof so that the motor shaft 140 is coupled. A plurality of protrusions 151 are formed on the outer circumferential surface of the electromagnet 150. The plurality of protrusions 151 may be arranged at regular intervals or at irregular intervals. A coil (not shown) may be wound on the protruding portion 151 to impart the polarity of N pole or S pole. Accordingly, when power is applied through the coil, the electromagnet 150 generates a magnetic force to rotate the cooling fan 160. [

The cooling fan 160 is disposed on one side of the rotor 130 via a fan bearing so as to rotate separately from the motor shaft 140. For example, when assuming that the left side of the rotor 130 is forward and the rear side is the right side of the rotor 130 in FIG. 2, the cooling fan 160 may be disposed behind the rotor 130. In one embodiment, as shown in FIGS. 3 and 4, the cooling fan 160 is applied with a bidirectional cooling fan 160 to provide cooling air in the direction of the rotor 130 and in the opposite direction. That is, the cooling fan 160 includes a fan body 161 having a first surface 160a and a second surface 160b opposite to the first surface 160a, The first wing 162 and the second wing 163 protruding from the first wing 162 and the second wing 163.

The fan body 161 is formed in a disc shape, and a shaft hole is formed at the center thereof so that the motor shaft 140 is inserted. A fan bearing may be interposed between the shaft shaft and the motor shaft 140. A plurality of guide protrusions may protrude from the first surface of the fan body 161, for example, a surface facing the electromagnet 150, so that attraction with the electromagnet 150 may occur. The guide protrusions may be made of a magnetic material, for example, a metal material, to generate attractive force by a magnetic force applied to the electromagnet 150. Alternatively, the entire cooling fan 160 may be made of a magnetic material.

The first wing 162 and the second wing 163 may be respectively provided on the first surface and the second surface of the fan body 161, respectively. The plurality of vanes may be disposed at regular intervals and may have a predetermined radius of curvature to induce airflow during rotation of the cooling fan 160. The curvature radii of the respective blades can be formed to be equal to each other.

The operation of the motor according to one embodiment of the present invention will now be described.

When the rotor 130 and the motor shaft 140 rotate due to the interaction with the stator 120, the cooling fan 160 fastened to the motor shaft 140 rotates the motor shaft 140 To provide cold air in both directions to release heat generated inside the housing.

That is, when the motor is driven, the DC power applied from the outside is applied to the rotor 130 through the electromagnet 150 fixed to the motor shaft 140. A current flows through the electromagnet 150 and attracts the cooling fan 160 located around the electromagnet 150 by magnetic force and transmits the rotational force of the rotor 130 to the bidirectional cooling fan 160. [ The intensity of the electromagnet 150 is increased in proportion to the magnitude of the current applied to the rotor 130 and the rotational force is provided to the bidirectional cooling fan 160 with the strong magnetic force.

Therefore, when the motor output is high (excessive heat is generated), the binding force between the rotor 130 and the bidirectional cooling fan 160 becomes strong, so that an efficient heat radiation operation according to the output can be performed. In addition, wings are provided on both sides of the cooling fan 160, so that cool air can be supplied to both the inside of the motor and the surrounding structures provided behind the motor.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be.

That is, it should be understood that the embodiments described above are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

Accordingly, the scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100; Motor 110; housing
111; A front housing 112; Rear housing
120; Stator 130; Rotor
140; Motor shaft 150; Electromagnet
160; Cooling fan 161; Fan body
162; A first wing 163; Second wing
164; Guide protrusions 170; Fan bearing

Claims

housing;
A rotor disposed inside the housing;
A motor shaft fixedly coupled to the rotor;
An electromagnet disposed at one side of the rotor and fixedly coupled to the motor shaft;
A cooling fan disposed on one side of the electromagnet and coupled to the motor shaft through a fan bearing so as to rotate separately from the motor shaft when the electromagnet is powered on;
And a cooling fan.

The method according to claim 1,
Wherein the housing comprises a front housing and a rear housing.

3. The method of claim 2,
Wherein one end and the other end of the motor shaft are coupled to the front housing and the rear housing via a front bearing and a rear bearing, respectively.

The method according to claim 1,
Wherein the cooling fan includes a fan body disposed on one side of the electromagnet, and vanes protruding outwardly from both sides of the fan body.

5. The method of claim 4,
And a plurality of guide protrusions, which are made of a magnetic material, are provided on one surface of the fan body facing the electromagnet.