KR102157087B1 - Structure of multipolar permanent magnet motor - Google Patents

Abstract

The present invention includes a stator in which a coil wound core is radially arranged and a hollow is formed through in the axial direction, and a permanent stator disposed on one side of the stator in the axial direction and rotated based on the rotation center in the axial direction by magnetic force with the coil. In a multi-pole permanent magnet motor structure comprising a magnet and a rotor in which one end in the axial direction is rotatably positioned in a hollow in a state coupled to the permanent magnet, the bracket coupled to one side in the axial direction of the stator, and the inside of the bracket It is formed according to, and includes a cooling channel for circulating the refrigerant supplied from the outside and then discharging it to the outside.

Description

Structure of multi-pole permanent magnet motor {STRUCTURE OF MULTIPOLAR PERMANENT MAGNET MOTOR}

The present invention relates to a permanent magnet multi-pole permanent magnet motor structure, and more particularly, by supporting each core wound with a coil using a bracket and circulating a refrigerant to cool the heat generated from the coil, the coil wound core The present invention relates to a multi-pole permanent magnet motor structure capable of firmly supporting and cooling the coils individually, thereby improving the cooling performance of the device.

In general, a motor is a device that converts electrical energy into mechanical energy to obtain rotational power, and a motor is classified into an AC motor and a DC motor according to the type of power applied from the outside.

Such a motor operates on the principle that a rotational torque is generated in the rotor by a rotating magnetic field generated when a current flows through a wound coil.

Conventional motors mostly include a housing, a stator fixedly coupled to the inside of the housing, a plurality of cores installed in the stator, a plurality of coils individually wound around the coils, and facing the core. It consists of a permanent magnet that is installed so as to rotate by magnetic force with a coil, and a rotor that is rotated by being combined with the permanent magnet.

In addition, a cooling structure of a water cooling method for cooling the heat generated from the coil is applied to the motor, and the cooling structure of the motor uses a method of circulating coolant after forming a flow path in the housing.

However, the cooling structure applied to the conventional motor simply circulates cooling water, and it is not a structure capable of efficiently cooling between coils where heat is concentrated.

As a prior document related to the present invention, there is Korean Patent Laid-Open No. 10-2012-0129132 (November 28, 2012), and the prior document discloses a rotor having permanent magnets of different sizes and a motor including the same. have.

An object of the present invention is to circulate a refrigerant to cool the heat generated in the coil by supporting each of the coiled cores using a bracket, so that the coiled core can be firmly supported, and between the coils individually It is to provide a multi-pole permanent magnet motor structure that can be cooled by using a method and improve the cooling performance of the device.

In addition, another object of the present invention is to provide a multi-pole permanent magnet motor structure capable of preventing the installation position of the coil from being changed by an external force by forming a seating groove in the support piece of the bracket.

The multi-pole permanent magnet motor structure according to the present invention includes a stator in which a coil wound core is radially arranged and a hollow is formed through in the axial direction, and is disposed on one surface in the axial direction of the stator, and is axially formed by magnetic force with the coil. In the multi-pole permanent magnet motor structure comprising a permanent magnet rotated based on a rotation center of a direction, and a rotor having one end in an axial direction rotatably positioned in the hollow while being coupled with the permanent magnet, the stator It characterized in that it comprises a bracket coupled to one side in the axial direction, and a cooling channel formed along the inside of the bracket to circulate the refrigerant supplied from the outside and discharge it to the outside.

Here, the bracket is a ring-shaped body coupled to one surface in the axial direction of the stator while surrounding the hollow edge, and a plurality of support pieces extending radially from the edge of the body to be coupled between the cores. It features.

In addition, the cooling channel is formed along the inside of the body, the first cooling flow path in which inlets and outlets are respectively formed so that the refrigerant is supplied and discharged, and formed along the insides of the support pieces, the first cooling channel A second cooling channel may be formed to circulate the refrigerant delivered from the outlet side and then move it to the inlet side of the first cooling channel.

In addition, the first cooling passage may be continuously formed along the circumferential direction of the body, and may have a circulation structure such that the refrigerant is supplied through the inlet and then discharged through the outlet, and the second cooling passage is The support pieces may have a length along the extending direction, and may have a circulation structure such that the refrigerant transferred from the outlet side of the first cooling channel is circulated and then moved to the inlet side of the first cooling channel.

In addition, each of the support pieces may have their extended ends coupled to one surface in the axial direction of the stator by a fastening member.

In addition, the support pieces may support both ends of the coil wound around the cores in a state in which both ends in the width direction are in close contact with each other.

In addition, the support pieces may have seating grooves formed at both ends in the width direction, respectively, and the seating grooves may be in close contact with each other in a shape corresponding to both ends of the coil.

In addition, a housing may be further coupled to the outside of the stator, the permanent magnet, the rotor, and the bracket, and a supply port connected to the inlet so that the refrigerant is supplied from the outside of the housing, and the externally the A discharge port connected to the outlet may be formed so that the refrigerant is discharged.

In addition, a ring-shaped packing may be further coupled between the stator and the bracket, and both ends of the packing may be in close contact with the stator and one surface in the axial direction of the bracket, respectively.

In the present invention, since the core on which the coil is wound is supported by the bracket and individual cooling is performed at the same time, the core on which the coil is wound can be firmly supported, and the coils can be individually cooled, thereby improving the cooling performance of the device. It has an effect that can be made.

In addition, the present invention has an effect of preventing the installation position of the coil from being changed by an external force by forming a seating groove that can be in close contact with the outer surface of the coil on the support piece of the bracket.

1 is a side cross-sectional view of a combined state of a multi-pole permanent magnet motor structure according to the present invention.
Figure 2 is a cross-sectional plan view for showing the combined state of the multi-pole permanent magnet motor structure according to the present invention.
3 is a side cross-sectional view for showing the bracket of the multi-pole permanent magnet motor structure according to the present invention.
4 is a plan view showing a bracket of a multi-pole permanent magnet motor structure according to the present invention.
5 is a side cross-sectional view for showing a housing of a multi-pole permanent magnet motor structure according to the present invention.
6 is a cross-sectional plan view showing a housing of a multi-pole permanent magnet motor structure according to the present invention.

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

Advantages and features of the present invention, and a method of achieving the same will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

However, the present invention is not limited by the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments are intended to complete the disclosure of the present invention, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims.

In addition, in describing the present invention, when it is determined that related known technologies or the like may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Figure 1 is a side cross-sectional view showing the coupling state of the multi-pole permanent magnet motor structure according to the present invention, Figure 2 is a flat cross-sectional view for showing the coupling state of the multi-pole permanent magnet motor structure according to the present invention, Figure 3 is according to the present invention It is a side cross-sectional view to show the bracket of the multi-pole permanent magnet motor structure.

Figure 4 is a plan view showing the bracket of the multi-pole permanent magnet motor structure according to the present invention, Figure 5 is a side cross-sectional view for showing the housing of the multi-pole permanent magnet motor structure according to the present invention, Figure 6 is according to the present invention It is a top cross-sectional view to show the housing of the multi-pole permanent magnet motor structure.

1 to 6, the structure of the multi-pole permanent magnet motor according to the present invention includes a housing 100, a stator 200, a permanent magnet 300, a rotor 400, and a bracket 500 ) And, a cooling channel 600.

First, the housing 100 has an installation space 110 having a predetermined width inside so that the stator 200, the permanent magnet 300, the rotor 400, and the bracket 500, which will be described later, can be installed.

Here, the housing 100 may have a cylindrical shape as shown in FIG. 2, and the shaft hole 120 is formed through the axial direction so that the axial direction of the rotor 400 to be described later is coupled through the axial direction of the housing 100. Can be.

In addition, a supply port 130 may be formed outside the housing 100 to supply a refrigerant (coolant, etc., W) from the outside, and a discharge port 140 to discharge the refrigerant W to the outside.

The supply port 130 may be connected to the inlet 601 of the cooling channel 600 to be described later, and the discharge port 140 may be connected to the outlet 602 of the cooling channel 600 to be described later.

In addition, a pipe for supplying and discharging the refrigerant W may be connected to the supply port 130 and the discharge port 140, and a pipe connected to the supply port 130 and the discharge port 140 is a separate refrigerant supply unit. (Not shown) and the discharge configuration (not shown) may be connected.

In the stator 200, one axial surface may be coupled to one axial surface of the installation space 110, and a permanent magnet 300 to be described later may be rotatably positioned on an opposite surface.

Here, in the center portion of the stator 200, a hollow 201 is formed through the axial direction so that one end of the rotor 400 to be described later is rotatably penetrated.

In addition, on one surface of the stator 200 in the axial direction, the cores 210 on which the coil 220 is wound as shown in FIG. 2 are arranged in a radially spaced state (20 poles, etc.).

The cores 210 may be radially spaced apart at equal intervals based on the central axis line in the axial direction of the hollow 201, but the number and spacing of the cores 210 may be variously applied as needed.

In addition, the cores 210 may have a shape in which the width in the radial direction gradually increases toward the edge of the stator 200 as shown in FIG. 2.

In addition, a winding groove may be formed concave at the edges of the cores 210 so that the coil 220 can be wound, and both sides of the coil 220 wound in the winding groove are caught at both ends of the core 210 in the axial direction. Steps for positioning may be formed.

At this time, the coil 220 may be individually wound on the outside of the cores 210 and generates magnetic force by a current supplied from an external power supply (not shown).

That is, it operates on the principle that rotational torque is generated in the rotor 400 by the magnetic flux generated when current flows through the coil 220 wound around the core 210 and the magnetic flux of the permanent magnet 300 to be described later. do.

The permanent magnet 300 is disposed on one surface of the stator 200 in the axial direction as shown in FIG. 1 and rotates in the radial direction by magnetic force with the coil 220 through which a current flows.

Here, the permanent magnet 300 may be rotated while being coupled to a disk-shaped plate, and the permanent magnet 300 may be coupled to both sides of the plate in the axial direction.

At this time, the permanent magnet 300 may be arranged so that different polarities (N/S) are repeated along the radial direction of the plate, and the permanent magnet 300 and the plate are along the axial direction of the rotor 400 to be described later. Many can be combined.

The bracket 400 is coupled between the one surface in the axial direction of the stator 200 and the permanent magnet 300, and the bracket 400 may be provided with a body 510 and a plurality of support pieces 520 .

The body 510 may have a ring shape as shown in FIGS. 2 and 4, and may be coupled to one surface of the stator 200 in the axial direction in a state surrounding the edge of the hollow 201.

In addition, a ring-shaped coupling protrusion along the edge of the hollow 201 may protrude on one surface of the stator 200 in the axial direction, wherein the inner circumferential surface of the body 510 is coupled in close contact with the outer circumferential surface of the coupling protrusion. I can.

The support pieces 520 may extend radially from the edge of the body 510 and be coupled between the cores 210.

Here, the extended ends of the support pieces 520 may be respectively coupled to one surface in the axial direction of the stator 200 by a fastening member (not shown), but the fixing structure of the support pieces 520 is variously applied as necessary. This is possible.

In addition, the support pieces 520 may support both ends of the coil 220 wound around the cores 210 in a state in which both ends in the width direction are in close contact as shown in FIG. 1.

At this time, the support pieces 520 may have seating grooves 521 formed concave at both ends in the width direction, respectively, and the seating grooves 521 may be in close contact with each other in a shape corresponding to both ends of the coil 220.

In this state, since the coil 220 is positioned on both sides of the seating groove 521, the coil 220 can be firmly fixed without flowing in the center and radial direction of the stator 200.

The cooling channel 600 is for circulating the refrigerant W, and the cooling channel 600 is formed along the inside of the bracket 500 to circulate the refrigerant (coolant, etc.) delivered from the outside and then discharge it to the outside. .

Here, the cooling channel 600 is formed along the inside of the body 510, and an inlet 601 and an outlet 602 are respectively formed so that the refrigerant W is supplied and discharged.

In more detail, the cooling channel 600 may be divided into a first cooling passage 610 formed in the body 510 and a second cooling passage 620 formed in the support pieces 520.

The first cooling passage 610 is formed along the interior of the body 510 as shown in FIGS. 1 and 3, and an inlet 601 and an outlet 602 may be formed respectively so that the refrigerant W is supplied and discharged.

Here, the first cooling passage 610 may be formed continuously along the circumferential direction of the body 510, and a circulation structure so that the refrigerant W is supplied through the inlet 601 and then discharged through the outlet 602 Can have

The second cooling passage 620 is formed along the inside of the support pieces 520, and after circulating the refrigerant W delivered from the outlet side of the first cooling passage 610, the inlet of the first cooling passage 610 Can be moved to the side.

Here, the second cooling passage 620 may have a length along the direction in which the support pieces 520 extend, and after the refrigerant W delivered from the outlet side of the first cooling passage 610 is circulated, the first cooling It may have a circulation structure so as to move toward the entrance of the flow path 610.

For example, the first cooling passage 610 and the second cooling passage 620 may be divided in a plurality along the axial or radial direction of the stator 200 to communicate with each other.

In this case, the refrigerant (W) supplied through the supply port 130 and the inlet 601 of the housing 100 is circulated along the second cooling channel 620 while moving along the first cooling channel 610. I can.

Thereafter, the refrigerant W circulated along the first cooling passage 610 and the second cooling passage 620 may be discharged to the outside through the outlet 602 and the discharge port 140 of the housing 100.

In this process, the heat generated in the coil 220 may be cooled by circulation of the refrigerant W, and the first cooling passage 610 and the second cooling passage 620 are located in proximity to the coil 220. Since the refrigerant W is circulated, the cooling efficiency of the device can be improved.

Meanwhile, at least one ring-shaped packing 700 may be further coupled between the stator 200 and the bracket 500 described above, and the packing 700 may be manufactured using a material such as resin or rubber.

At this time, both ends of the packing 700 may be in close contact with one surface in the axial direction of the stator 200 and the bracket 500, respectively, and the gap between the stator 200 and the bracket 500 may be sealed by the packing 700. I can.

As a result, in the present invention, since the core 210 on which the coil 220 is wound is supported by the bracket 500 and individual cooling is performed, the coil 220 can firmly support the wound core 210. Also, since the coils 220 can be individually cooled, cooling performance of the device can be improved.

In addition, the present invention is by forming a mounting groove 521 that can be in close contact with the outer surface of the coil 220 on the support piece 520 of the bracket 500, the installation position of the coil 220 is changed by an external force Can be prevented.

Until now, specific embodiments of the multi-pole permanent magnet motor structure of the present invention have been described, but it is obvious that various embodiments can be modified without departing from the scope of the present invention.

Therefore, the scope of the present invention is limited to the described embodiments and should not be transmitted, and should be determined by the claims to be described later, as well as those equivalents to the claims.

That is, the above-described embodiments are to be understood as illustrative in all respects and not limiting, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and All changes or modified forms derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

100: housing 110: installation space
120: shaft hole 130: supply port
140: discharge port 200: stator
201: hollow 210: core
220: coil 300: permanent magnet
400: rotor 500: bracket
510: body 520: support piece
521: mounting groove 600: cooling channel
601: inlet 602: outlet
610: first cooling passage 620: second cooling passage
700: packing W: refrigerant

Claims (9)

A stator having a coil wound core radially coupled thereto and a hollow formed therethrough in the axial direction, a permanent magnet disposed in the axial direction of the stator and rotated based on the rotation center in the axial direction by magnetic force with the coil, and In the multi-pole permanent magnet motor structure comprising a rotor that is rotatably positioned in the hollow at one end in the axial direction while being coupled with the permanent magnet,
A bracket coupled to one surface of the stator in the axial direction; And
A cooling channel formed along the inside of the bracket and circulating the refrigerant supplied from the outside and then discharging it to the outside;
The core is formed in a shape in which the width in the radial direction gradually increases toward the edge of the stator;
The bracket includes a ring-shaped body coupled to one surface in the axial direction of the stator while surrounding the hollow edge, and a plurality of support pieces extending radially from the edge of the body and coupled between the cores;
The cooling channel is formed along the inside of the body, and is formed along the inside of the support pieces and a first cooling flow path each having an inlet and an outlet so that the refrigerant is supplied and discharged. A second cooling passage for circulating the refrigerant delivered from the outlet side and then moving to the inlet side of the first cooling passage is formed;
The support pieces are respectively formed with seating grooves concave at both ends in the width direction, and the seating grooves are in close contact with each other in a shape corresponding to both ends of the coil, so that the support pieces are wound around the cores in the width direction. Supporting both ends of the unit in close contact;
The support pieces, the multi-pole permanent magnet motor structure, characterized in that the extended ends are coupled to one surface in the axial direction of the stator by a fastening member. delete delete The method according to claim 1,
The first cooling flow path,
It is continuously formed along the circumferential direction of the body, and has a circulation structure such that the refrigerant is supplied through the inlet and then discharged through the outlet,
The second cooling flow path,
A multi-pole permanent magnet motor having a length along a direction in which the support pieces extend, and having a circulation structure so that the refrigerant transferred from the outlet side of the first cooling channel is circulated and then moved to the inlet side of the first cooling channel. rescue. delete delete delete The method according to claim 1,
Outside of the stator, the permanent magnet, the rotor, and the bracket,
The housing is further combined,
On the outside of the housing,
A supply port connected to the inlet so that the refrigerant is supplied from the outside, and
A multi-pole permanent magnet motor structure, characterized in that each discharge port connected to the outlet is formed to discharge the refrigerant to the outside. The method according to claim 1,
Between the stator and the bracket,
Ring-shaped packing is further combined,
Both ends of the packing,
Multi-pole permanent magnet motor structure, characterized in that in close contact with each of the stator and the axial surface of the bracket.

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