KR20170062889A

KR20170062889A - Surface permanent magnet synchronous motor

Info

Publication number: KR20170062889A
Application number: KR1020150168630A
Authority: KR
Inventors: 황규윤
Original assignee: 주식회사 만도
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2017-06-08

Abstract

A permanent magnet synchronous motor according to an embodiment of the present invention includes a belt member having a length corresponding to a circumference of the rotor core and being assembled to the rotor core while surrounding the outer circumferential surface of the rotor core; And a plurality of permanent magnets provided on the belt member along the longitudinal direction of the belt member to be spaced apart from the belt member by a predetermined distance. The permanent magnet is magnetized after the belt member is assembled to the rotor core.

Description

[0001] SURFACE PERMANENT MAGNET SYNCHRONOUS MOTOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a surface-mounted permanent magnet synchronous motor, and more particularly, to a surface-mounted permanent magnet synchronous motor capable of preventing a permanent magnet from being detached from a rotor core.

Generally, a synchronous motor is an electric motor in which the speed of the rotor is constant regardless of the load, when the motor is operated normally. The synchronous motor is composed of a stator for generating a rotating magnetic field and a rotor having a magnetic pole.

In particular, among synchronous motors, permanent magnet synchronous motors are synchronous motors that use permanent magnets in the field. They are relatively efficient and relatively easy to repair as compared to other motors, and there is no rise in temperature due to field loss. .

In such permanent magnet synchronous motor, a permanent magnet is disposed on the outer circumferential surface of the rotor core, and an alternating current is formed by rotating the rotor core in the armature coil.

Here, the rotor core can be rotated at a high speed as required. When the rotor core rotates at a high speed, the permanent magnet disposed on the outer circumferential surface of the rotor core can be separated from the rotor core by centrifugal force. If the permanent magnet is detached from the rotor core, an alternating current can not be formed and the permanent magnet must be frequently maintained, which is troublesome and the manufacturing efficiency is lowered.

Korean Patent Registration No. 10-1361638

In order to solve the above-described problems, a surface mount permanent magnet synchronous motor according to an embodiment of the present invention aims to solve the following problems.

The permanent magnet is attached to the belt member, the belt member having the permanent magnet attached thereto is assembled to the rotor core, the permanent magnet is magnetized on the rotor core after the belt member is assembled to the rotor core, The permanent magnet can be easily maintained and improved in manufacturing, and mass production can be achieved, and productivity can be increased.

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

A surface-mounted permanent magnet synchronous motor according to an embodiment of the present invention includes a belt member having a length corresponding to a circumference of a rotor core, the belt member surrounding the outer circumferential surface of the rotor core and being assembled to the rotor core; And a plurality of permanent magnets provided on the belt member along the longitudinal direction of the belt member to be spaced apart from the belt member by a predetermined distance. The permanent magnet is magnetized after the belt member is assembled to the rotor core.

The rotor core may have a first groove recessed at an end thereof.

The first groove may have a smaller diameter at one end from the center to the edge of the rotor core.

The first groove may have a triangular shape.

The belt member further includes an assembling protrusion protruding in a direction intersecting the direction in which the permanent magnet is disposed and corresponding to the shape of the first groove and inserted into the groove when the rotor is assembled to the rotor core can do.

And a fixing member coupled to both end portions of the rotor core after the belt member is assembled to the rotor core to strengthen the fixing force of the permanent magnets magnetized to the rotor core.

The fixing member includes a first fixing protrusion formed to protrude toward the rotor core when coupled to the rotor core and coupled to the first groove, and a second fixing protrusion formed between the plurality of permanent magnets disposed on the outer circumferential surface of the rotor core, And a second fixing protrusion coupled to the second fixing protrusion.

The fixing member may be made of a non-magnetic material.

In the surface-mounted permanent magnet synchronous motor according to the embodiment of the present invention, the belt member having the permanent magnet attached thereto is assembled to the rotor core, and the permanent magnet is magnetized after the belt member is assembled to the rotor core, It is possible to easily maintain and fix the permanent magnets to be attached, to improve the quality of the permanent magnets, to enable mass production, to increase the productivity, and to improve the manufacturing efficiency.

Further, the fixing member is coupled to both end portions of the rotor core after the permanent magnet is magnetized to the rotor core, thereby blocking the leakage magnetic flux, thereby preventing the torque of the motor from being lowered.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned may be clearly understood by those skilled in the art from the following description.

1 is a perspective view schematically showing a surface-mounted permanent magnet synchronous motor according to an embodiment of the present invention,
FIG. 2 is an exploded view of the surface mount type permanent magnet synchronous motor of FIG. 1,
Fig. 3 is a view showing a rotor core and a fixing member to which a belt member of the surface-mountable permanent magnet synchronous motor of Fig. 1 is attached.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. In the following description, a detailed description of related arts will be omitted when it is determined that the gist of the present invention may flow. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a general configuration of a surface mount type permanent magnet synchronous motor according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view schematically showing a surface mount type permanent magnet synchronous motor according to an embodiment of the present invention, FIG. 2 is an exploded view of a surface mount type permanent magnet synchronous motor of FIG. 1, Fig. 3 is a view showing a rotor core and a fixing member to which a belt member of the surface mount type permanent magnet synchronous motor of Fig.

1 to 3, a surface mount permanent magnet synchronous motor according to an embodiment of the present invention includes a belt member 200, a permanent magnet 300, and a fixing member 400.

The belt member 200 has a length corresponding to the circumference of the rotor core 100 and is assembled to the rotor core 100 while surrounding the outer circumferential surface of the rotor core 100. Here, the rotor core 100 may have a first groove 110 formed at its end.

Specifically, when the belt member 200 is assembled to the rotor core 100, the belt member 200 surrounds the entire outer peripheral surface of the rotor core 100, And is attached and assembled to the outer peripheral surface of the electronic core (100). Here, the belt member 200 may be attached to the outer circumferential surface of the rotor core 100 by an adhesive material.

Although not shown in the drawings, the belt member 200 may further include an assembling protrusion (not shown). The assembling protrusions are formed to protrude in a direction intersecting the direction in which the permanent magnet 300 is disposed and correspond to the shape of the first groove 110. When the rotor core 100 is assembled with the rotor core 100, As shown in FIG.

That is, when the belt member 200 is assembled to the rotor core 100, the assembly protrusions can be assembled to the rotor core 100 while being inserted into the first groove portion 110 of the rotor core 100.

The diameter of the first trench 110 decreases from the center to the edge of the rotor core 100 at one end. In this embodiment, the first trench 110 may be formed in a triangular shape, or may be formed in a triangular shape as well as a pentagonal shape.

Thus, the diameter of the first groove portion 110 decreases from the center portion to the edge portion of the rotor core 100, so that the first groove portion 110 does not affect the magnetic flux formation.

In this embodiment, the rotor core 100 has a hollow cylindrical shape. The thickness of the rotor core 100 is determined according to the capacity or application of the rotor, and the rotor core 100 may be made of a soft steel sheet or the like. The rotor core 100 may be rotated by being press-fitted into the rotating shaft or by integrally forming the rotating shaft and the rotor core, and may be made to withstand the centrifugal force as it rotates at a high speed.

A plurality of permanent magnets 300 are attached to the belt member 200 along the longitudinal direction of the belt member 200 at a predetermined interval.

The permanent magnets 300 are alternately arranged on the surface with N pole and S pole in a predetermined interval and a magnetic field may be formed according to an attachment position where the permanent magnet 300 is spaced apart from the belt member 200 by a predetermined distance. Such a permanent magnet 300 can maintain a strong magnetization state for a long time, and can maintain magnetism stably without supplying electric energy from the outside.

In this case, the permanent magnet 300 may be attached to the belt member 200 using an adhesive material, a buried groove (not shown) may be formed on the outer surface of the belt member 200, The permanent magnet 300 can be attached to the belt member 200 by embedding the permanent magnet 300 therein.

In this embodiment, the permanent magnet 300 is magnetized after the belt member 200 is assembled to the rotor core 100. [ That is, when a plurality of permanent magnets 300 are attached to the belt member 200 at a predetermined distance and the belt member 200 having the permanent magnets 300 attached thereto is assembled to the rotor core 100, Is magnetized to the rotor core 100, and an alternating current can be generated as the rotor core 100 rotates.

The belt member 200 to which the permanent magnet 300 is attached is assembled to the rotor core 100 and the permanent magnet 300 is wound around the rotor core 100 after the belt member 200 is assembled to the rotor core 100. [ The permanent magnet 300 attached to the belt member 200 can be easily maintained and improved in manufacturing, mass production can be achieved, productivity can be increased, and manufacturing efficiency can be improved.

The fixing member 400 is coupled to both ends of the rotor core 100 after the belt member 200 is assembled to the rotor core 100 and is fixed to both ends of the permanent magnet 300 Strengthen the fixing force. The fixing member 400 may be configured to strengthen the fixing force of the permanent magnet 300 magnetized to the rotor core 100 so that the permanent magnet 300 does not separate from the rotor core 100 when the rotor core 100 rotates at high speed .

3, the fixing member 400 includes a protruding portion protruding toward the rotor core 100 when coupled to the rotor core 100 and coupled to the recess 110 formed at the end of the rotor core 100, And a second fixing protrusion 420 coupled to the second groove 220 between the plurality of permanent magnets 300 disposed on the outer circumferential surface of the rotor core 100. [

That is, after the belt member 200 having the permanent magnet 300 attached thereto is assembled to the rotor core 100, the first fixing protrusion 410 is inserted into the groove portion of the rotor core 100 And the second fixing protrusion 420 is coupled to the second groove 220 between the plurality of permanent magnets 300 to strengthen the fixing force of the permanent magnet 300 magnetized to the rotor core 100 .

In this embodiment, the fixing member 400 can be made of a non-magnetic material that does not affect the magnetic flux formation. Such a fixing member 400 is coupled to both end portions of the rotor core 100 after the permanent magnet 300 is magnetized to the rotor core 100 to thereby block the leakage magnetic flux, Can be prevented.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but are intended to be illustrative, and thus the scope of the technical idea of the present invention is not limited by these embodiments. 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 and their equivalents. It should be interpreted.

100: rotor core
110: first groove
200: Belt member
220: second groove
300: permanent magnet
400: Fixing member
410: first fixing projection
420: second fixing projection

Claims

A belt member 200 having a length corresponding to the circumference of the rotor core 100 and assembled to the rotor core 100 while surrounding the outer circumferential surface of the rotor core 100; And
And a permanent magnet (300) provided in a plurality of the belt members (200) and spaced from the belt member (200) along the longitudinal direction of the belt member (200)
Wherein the permanent magnet (300) is magnetized after the belt member (200) is assembled to the rotor core (100).

The method according to claim 1,
Wherein the rotor core (100) has a first groove (110) recessed at an end thereof.

3. The method of claim 2,
The first trench 110 may be formed by,
Wherein a diameter of the one end decreases from a central portion to an edge portion of the rotor core (100).

The method of claim 3,
Wherein the first groove portion (110) is formed in a triangular shape.

5. The method of claim 4,
The belt member (200)
The protrusion is formed to protrude in a direction intersecting the direction in which the permanent magnet 300 is disposed and corresponds to the shape of the first groove 110. When the protrusion is assembled to the rotor core 100, Wherein the permanent magnet synchronous motor further comprises an assembling protrusion to be inserted.

6. The method of claim 5,
The permanent magnets 300 are coupled to both ends of the rotor core 100 after the belt member 200 is assembled to the rotor core 100. The permanent magnets 300 are fixed to the rotor core 100, And a fixing member (400) for strengthening the permanent magnet (400).

The method of claim 6, wherein
The fixing member (400)
A first fixing protrusion 410 protruding toward the rotor core 100 when coupled to the rotor core 100 and coupled to the first groove 110; And
And a second fixing protrusion (420) coupled to a second groove portion (220) between a plurality of permanent magnets (300) disposed on an outer circumferential surface of the rotor core (100).

8. The method of claim 7,
The stationary member (400) is made of a non-magnetic material.