KR20140078800A - Motor having cooling element - Google Patents

Abstract

Disclosed is a motor having a cooling element. The motor having a cooling element includes a stator which includes a stator core and a stator coil which is wound around the stator core; a rotor which is arranged to rotate with regard to the stator, and a cooling member which allows a cooling fluid to flow and is combined with the stator along the inner surface of the stator.

Description

TECHNICAL FIELD [0001] The present invention relates to a motor having a cooling member,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric motor having a cooling member, and more particularly, to an electric motor having a cooling member that receives a power supply to generate a high rotational force.

Generally, an electric motor includes a stator wound with a coil having a magnetic force and a rotor serving as a rotor. The stator includes a magnetic flux generated by a current applied to a coil wound around the stator, Is a device that uses the power of the motor.

The electric motor is required to be cooled as the heat generated from the stator and the rotor is generated during driving.

The motor cooling system can be roughly divided into an air cooling system using a cooling fan and a water cooling system using cooling water. In the case of the water-cooled type, there is a method of inserting and inserting a cooling member between the inner circumferential surface and the outer circumferential surface of the housing by using the double housing structure and inserting the cooling member along the outer circumferential surface of the stator.

However, the double housing structure has a disadvantage in that it is deteriorated in terms of shock and safety due to vibration resistance as compared with the method of assembling the cooling member by inserting the cooling member. In the method of assembling the cooling member by inserting the cooling member, This requires a considerable precision, and it takes a long time.

Further, there is a problem in that a space inside the housing must be additionally secured as the cooling member is inserted into the outer circumferential surface of the stator.

Korean Unexamined Patent Publication No. 2001-0121851 discloses an electric motor in which a cooling unit is coupled to an outer surface of a stator. However, grooves corresponding to the shape of the cooling unit are formed on the outer surface of the stator, and the inserting process is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a stator and a cooling member, which can improve a cooling effect by disposing a cooling member adjacent to the stator, And an electric motor having a cooling member.

Another object of the present invention is to provide an electric motor having a cooling member capable of effectively utilizing a space by engaging a cooling member along an inner peripheral surface of a stator.

According to an aspect of the present invention, there is provided a stator comprising: a stator core; and a stator coil wound around the stator core; And a cooling member including a rotor rotatably disposed with respect to the stator and a cooling member formed inside the stator so as to allow a cooling fluid to flow therein and coupled to the stator.

And a mold member integrally burying the cooling member and the stator coil.

The mold member may be made of at least one of graphite, silicon, and plastic.

The cooling member may be formed by bending a pipe having an inner pipe a plurality of times.

The cooling member may include a first flow path portion extending in a longitudinal direction of the stator and a second flow path portion communicating with the first flow path portion.

In the electric motor having the cooling member according to the present invention, the cooling effect can be improved by disposing the cooling member adjacent to the stator, and the manufacturing process can be simplified by integrally joining the stator and the cooling member.

Further, the space can be efficiently utilized by coupling the cooling member along the inner circumferential surface of the stator.

1 is a cross-sectional view of an electric motor according to an embodiment of the present invention,
2 is a sectional view of a stator and a cooling member according to an embodiment of the present invention,
FIG. 3 is a view showing a coupling between a stator and a cooling member according to an embodiment of the present invention;
4 is a combined view of a stator, a cooling member, and a molding member according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

FIG. 1 is a cross-sectional view of an electric motor according to an embodiment of the present invention, and FIG. 2 is an exploded cross-sectional view of a stator and a cooling member according to an embodiment of the present invention.

1, an electric motor according to an embodiment of the present invention includes a stator 20 including a stator core and a stator coil 21 wound around the stator core, a rotor 20 rotatably disposed with respect to the stator 20, A cooling member 40 and a stator coil 21 which are formed so as to allow a cooling fluid to flow inside the stator 20 and to be coupled to the stator 20 along the inner circumferential surface of the stator 20, And a mold member (70).

First, the housing 10 may be formed as a tube having a receiving space therein and a circular cross section having both ends opened and a predetermined diameter in the longitudinal direction. Both open ends of the housing 10 can be covered by a pair of brackets 11. The bracket 11 is coupled to both ends of the housing 10 to have a cylindrical shape.

However, it is natural that the housing 10 may have a polygonal cross-section, and may be formed in various shapes depending on the shape of the stator 20.

The brackets 11 are coupled to both ends of the housing 10 and may have a shape corresponding to the shape of the end of the housing 10.

The bracket 11 may be provided with a bearing 60 so that the rotary shaft 50 of the rotor 30 can be rotatably supported.

The stator 20 can be installed in the housing accommodating space of the housing to generate magnetic force. The stator 20 may be disposed adjacent to the inner circumferential surface of the housing 10 and may include a core and a coil wound around the core. The stator coil 21 may be respectively wound and coupled to the divided stator cores as shown in Fig.

The stator 20 is open at both ends, and a circular receiving space in which the rotor 30 is rotatably received can be formed at the center. A plurality of slots and teeth may be formed in the inner diameter portion of the stator 20 along the circumferential direction of the space for accommodating the rotor 30. [

When a current is applied to the stator 20 to generate a magnetic force, the rotor is rotated by the electromagnetic induction of the rotor 30. At this time, heat is generated in the stator 20 and the rotor 30 due to the high output density .

The rotor 30 may be constituted by a so-called induction rotor having a rotor core, a plurality of conductor bars coupled to the rotor core, and an end ring electrically connectable with the conductor bar.

 The rotary shaft 50 can be integrally and rotatably coupled to the center of the rotor core. In an embodiment of the present invention, the rotor 30 is constituted by an induction rotor, but may be constituted by a so-called permanent magnet rotor having permanent magnets.

The rotor may be composed of a synchronous rotor using a difference in magnetic resistance or a hybrid rotor having a magnetic resistance difference and a permanent magnet at the same time.

The cooling member 40 is coupled to the stator 20 along the inner circumferential surface of the stator 20 and is integrally embedded through the molding member.

The cooling member 40 can contact the stator 20 along the inner circumferential surface of the stator 20 to cool the heat generated from the stator 20. [

The cooling member 40 may be formed by bending an integral tube shape a plurality of times, and may provide a path of movement of the cooling fluid along the inner tube.

The cooling member 40 may include a first flow path portion 43 extending in the longitudinal direction of the stator 20 and a second flow path portion 44 communicating the first flow path portion 43. The first flow path portion 43 extends in a longitudinal direction along the longitudinal direction of the housing 10 and the second flow path portion 44 is bent in a U shape to communicate the first flow path portion 43 with each other .

One end and the other end of the cooling member 40 function as an inlet 41 and an outlet 42 of the cooling water and protrude to the outside through the mold member and the housing 10.

As the cooling member 40 is disposed along the inner circumferential surface of the stator 20, the heat generated by the stator 20 and the rotor 30 can be effectively cooled.

The mold member is integrally embedded with the coil of the stator 20 and the cooling member 40 along the inner circumferential surface of the stator 20, and may be formed into a hollow cylindrical shape.

The rotor 30 may be rotatably disposed in the inner space of the mold member.

The mold member may be made of a material having a high thermal conductivity, for example, at least one of graphite, silicon, and plastic may be used.

FIG. 3 is a view showing a coupling between a stator and a cooling member according to an embodiment of the present invention, and FIG. 4 is a combined view of a stator, a cooling member, and a molding member according to an embodiment of the present invention.

2 to 4, a cooling member 40 formed by bending a plurality of times is inserted into the inner peripheral surface of the stator 20, and is integrally coupled to the stator 20 through the mold member. The mold member is formed in a hollow cylindrical shape and is formed so that the outflow port (42) and the inflow port (41) of the cooling member (40) protrude to the outside through the upper surface and the lower surface.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

10: Housing
20:
21: stator coil
30: Rotor
31: Rotor coil
40: cooling member
50:
60: Bearings

Claims (5)

A stator including a stator core and a stator coil wound around the stator core;
A rotor rotatably disposed relative to the stator, and
And a cooling member which is formed to flow a cooling fluid therein and which is coupled to the stator along the inner circumferential surface of the stator.
The method according to claim 1,
And a cooling member that is integrally embedded with the cooling member and the stator coil.
3. The method of claim 2,
Wherein the mold member comprises a cooling member made of at least one of graphite, silicon, and plastic.
The method according to claim 1,
Wherein the cooling member has a cooling member formed by bending a pipe having an inner pipe a plurality of times.
5. The method of claim 4,
And the cooling member includes a cooling member including a first flow path portion extending in the longitudinal direction of the stator and a second flow path portion communicating with the first flow path portion.

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