KR102191727B1 - Electric rotating machine and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a rotor for a rotating electric machine and a method for manufacturing the same. The rotor of the rotating electric machine of the present invention includes a permanent magnet; And a rotor core having a permanent magnet insertion portion into which the permanent magnet is inserted, wherein the permanent magnet is inserted into the permanent magnet insertion portion and is magnetized after being inserted, and the permanent magnet is magnetized before the magnetization and A protrusion protruding from one of the mutual contact surfaces of the permanent magnet insertion unit; And a protrusion receiving portion formed to receive the protrusion on the other one of the magnetic body and the mutual contact surface of the permanent magnet insertion unit. Accordingly, it is possible to easily align the position of the permanent magnet without the use of the fixing resin.

Description

Rotor of rotating electric machine and its manufacturing method {ELECTRIC ROTATING MACHINE AND MANUFACTURING METHOD THEREOF}

The present invention relates to a rotor for a rotating electric machine and a method for manufacturing the same.

As is well known, a rotating electric machine includes a stator and a rotor rotatably provided with respect to the stator. The rotating electric machine includes a generator that generates electrical energy and a motor that converts electrical energy into mechanical energy.

The rotating electric machine may be classified into an outer rotor type disposed outside the stator and an inner rotor type disposed inside the stator according to the position of the rotor.

In addition, the rotating electric machine may be classified as a synchronous machine in which the rotor rotates at a synchronous speed with a rotating magnetic field of the stator, and an induction machine in which the rotor rotates while slipping against the rotating magnetic field of the stator.

The synchronous machine includes a rotor core and a permanent magnet coupled to the rotor core.

The rotor core is provided with a permanent magnet insertion portion so that the permanent magnet can be inserted in the axial direction.

However, in the rotor of such a conventional rotating electric machine, the position of the permanent magnet inserted into the permanent magnet insertion portion of the rotor core is not aligned uniformly, so that vibration increases.

In addition, when the positions of the permanent magnets inserted into the permanent magnet insertion portion of the rotor core are not aligned, noise increases due to an increase in THD (Total Harmonic Dstorsion).

In addition, as described above, if the positions of the permanent magnets are not aligned, the high-speed operation area is restricted.

In consideration of this problem, in some cases, a permanent magnet is inserted into the permanent magnet insertion unit and a resin is filled in the permanent magnet insertion unit while the permanent magnet is aligned so that the permanent magnet is fixed in an aligned state. This is known.

However, in a rotating electric machine that fixes a permanent magnet using such a conventional resin, the production time is long because the rotor core must be preheated before filling the permanent magnet fixing resin inside the permanent magnet insertion part of the rotor core. You lose.

In addition, in a rotating electric machine that fixes a permanent magnet using such a conventional resin, it takes time to cure the resin after filling the fixing resin in the permanent magnet, thereby further increasing the production time. .

In addition, in a rotating electric machine that fixes a permanent magnet using such a conventional resin, the cost of purchasing a fixing resin, an increase in cost due to preheating of the rotor core for filling the fixing resin, and curing of the fixing resin are reduced. There is a problem in that the total manufacturing cost is remarkably increased due to the prolonged production time.

KR 101030482 B1 KR 101044034 B1 KR 1020130000603 A

Accordingly, an object of the present invention is to provide a rotor of a rotating electric machine and a method of manufacturing the same, which can easily align the position of a permanent magnet without the use of a fixing resin.

In addition, another object of the present invention is to provide a rotor for a rotating electric machine and a method of manufacturing the same, which can align the position of the permanent magnet and reduce the manufacturing cost.

In addition, another object of the present invention is to provide a rotor for a rotating electric machine and a method for manufacturing the same, which can maintain an aligned position of permanent magnets and suppress an increase in noise due to displacement of a permanent magnet.

In addition, another object of the present invention is to provide a rotor of a rotating electric machine and a method of manufacturing the same, capable of maintaining a position in which permanent magnets are aligned, enabling quiet operation and capable of high-speed operation.

The rotor of the rotating electric machine according to the present invention for solving the above-described problems is technically characterized in that the magnetic body before magnetization of the permanent magnet and the rotor core are aligned to be aligned at a preset position.

More specifically, by forming a protrusion on one of the mutual contact surfaces of the magnetic body before magnetization of the permanent magnet and the permanent magnet insertion portion of the rotor core into which the permanent magnet is inserted, and providing a protrusion receiving portion in which the protrusion is accommodated in the other, the The permanent magnet is aligned at the set position by the protrusion and the protrusion receiving part.

The rotor of the rotating electric machine, a permanent magnet; And a rotor core having a permanent magnet insertion portion into which the permanent magnet is inserted.

In the permanent magnet, a magnetized magnetic body is inserted into the permanent magnet insertion portion, and magnetized after insertion. As a result, the permanent magnet is a magnetic body in which no magnetic force is generated when the permanent magnet insertion portion is inserted, so that the permanent magnet is not interfered by the magnetic force and is easily aligned at a desired position.

The permanent magnet is configured such that at least one surface of the permanent magnet insertion portion is in contact.

Protrusions are formed on one of the mutual contact surfaces of the magnetized magnetic body and the permanent magnet insertion portion of the permanent magnet, and a protrusion receiving portion to accommodate the projections on the other of the mutual contact surfaces of the magnetic body and the permanent magnet insertion portion; Is formed.

Since the magnetic body does not generate magnetic force, it is easily aligned at a set position by the combination of the protrusion and the protrusion receiving portion.

In addition, since the magnetic body is magnetized in an aligned state, the aligned state is stably maintained by the magnetic force of the permanent magnet after magnetization.

The magnetic body and the permanent magnet insertion portion are insertedly coupled to each other having a first tolerance, and the protrusion and the protrusion receiving portion are insertedly coupled to each other having a second tolerance smaller than the first tolerance.

As a result, the magnetic body and the permanent magnet insertion part are easily inserted and coupled, and after magnetization, the magnetic force acting between the protrusion and the protrusion receiving part is more than the magnetic force acting between the permanent magnet and the permanent magnet insertion part. Because it is large, the permanent magnet can stably maintain its initial position aligned state.

The rotor of the rotating electric machine, a permanent magnet; And a rotor core having a permanent magnet insertion portion into which the permanent magnet is inserted, wherein the permanent magnet is inserted into the permanent magnet insertion portion and is magnetized after being inserted, and the permanent magnet is magnetized before the magnetization and A protrusion protruding from one of the mutual contact surfaces of the permanent magnet insertion unit; And a protrusion receiving portion formed to receive the protrusion on the other one of the magnetic body and the mutual contact surface of the permanent magnet insertion unit.

A coating part is formed on the magnetic body, and the protrusion or the protrusion receiving part is formed on the coating part.

The coating part is formed on the surface of the magnetic body of the permanent magnet. The coating part is composed of steel as a main component and includes epoxy. The coating part is formed on the surface of the magnetic body to prevent corrosion and/or loss of the permanent magnet.

The permanent magnet has a rectangular parallelepiped shape having a relatively thin thickness. The permanent magnet insertion portion is formed through the axial direction of the rotor core to correspond to the cross-sectional shape of the permanent magnet. The permanent magnet insertion portion is disposed close to the circumference of the rotor core and spaced apart from each other along the circumferential direction.

Here, the rotor is disposed rotatably inside the stator.

A rotation shaft is provided at the center of the rotor core.

The rotor core is constructed by insulating and laminating circular steel plates.

A rotation shaft hole into which a rotation shaft is inserted is formed through the center of the rotor core.

The permanent magnet insertion portion has an inner wall and an outer wall facing each other. The inner wall and the outer wall are disposed to be spaced apart from each other along the radial direction of the rotor core.

In one embodiment of the present invention, the coating part is formed to correspond to the inner wall.

Here, the coating part is formed on one of the six outer surfaces of the magnetic body that faces the inner wall of the permanent magnet insertion part.

The protrusion is formed on the coating part.

The protrusion receiving portion is formed on the inner wall of the permanent magnet insertion portion.

In addition, in another embodiment of the present invention, the protrusion receiving portion is formed on the coating portion.

The protrusion is formed to protrude toward the protrusion receiving part on the inner wall of the permanent magnet insertion part.

On the other hand, in an embodiment of the present invention, the magnetic body is configured to be inserted into the permanent magnet insertion portion such that any one of the inner wall and both side walls disposed on both sides of the inner wall and two outer surfaces contact each other.

The magnetic body is inserted into the permanent magnet insertion portion to be in contact with the rear end portion along the rotation direction of the rotor core.

The magnetic body is in contact with one surface corresponding to the inner wall of the permanent magnet insertion unit and the other surface contacting the rear end along the rotation direction of the rotor core among both side walls vertically disposed from the inner wall, so that the permanent magnet is rotated. This can be stably supported.

In another embodiment of the present invention, the coating part is formed on a surface corresponding to the outer wall.

As a result, the permanent magnet is close to the circumference of the rotor core, so that the magnetic flux density of the air gap can be further increased.

The permanent magnet insertion portion has an inner wall and both sidewalls formed on both sides of the inner wall and has a shape that is open to the outside, and the coating portion is formed on a surface contacting the inner wall.

Accordingly, the permanent magnet may be disposed close to the void.

Protrusions protruding toward the permanent magnet are provided on both side walls.

As a result, a gap between the permanent magnet and both side walls may be reduced.

On the other hand, the protrusion and the protrusion receiving portion are configured to be fitted with a preset clamp.

As a result, when the magnetic material is inserted, the magnetic material can be stably maintained in a position-aligned state.

The protrusion has a dovetail shape, and the protrusion receiving portion has a dovetail groove shape.

Accordingly, even if an external force acts upon the coupling of the protrusion and the protrusion receiving part, the combined state of the protrusion and the protrusion receiving part can be more stably maintained.

An adhesive is applied to one or the other of the protrusion and the mutual contact surface of the protrusion receiving portion.

As a result, the protrusion and the protrusion receiving portion can be stably maintained in a coupled state while forming more various shapes of the protrusion and the protrusion receiving portion.

On the other hand, according to another field of the present invention, a protrusion is formed on one of the mutual contact surfaces of the magnetized magnetic body of the permanent magnet and the permanent magnet insertion portion of the rotor core into which the permanent magnet is inserted, and the protrusion is accommodated in the other. Providing a permanent magnet and a rotor core to form a receiving portion; Inserting a magnetic body of the permanent magnet into the permanent magnet insertion portion so that the projection is inserted into the projection receiving portion; And magnetizing the magnetic material to form the permanent magnet.

Providing the permanent magnet and the rotor core, respectively, may include forming a coating part on the surface of the magnetic body of the permanent magnet on which the protrusion or the protrusion receiving part is formed, wherein the protrusion or the protrusion receiving part is the coating part. Is formed in

And fixing the magnetic body of the permanent magnet to the rotor core before the step of magnetizing the magnetic body to form the permanent magnet.

The fixing of the magnetic body of the permanent magnet to the rotor core may include: forming the protrusion and the protrusion receiving portion to have a preset clamp; And pressing the protrusion and the protrusion receiving portion.

The fixing of the magnetic body of the permanent magnet may include applying an adhesive to one or the other of the protrusion and the mutual contact surface of the protrusion receiving portion; And adhering the protrusion and the protrusion receiving portion.

In the step of preparing the permanent magnet and the rotor core, respectively, the magnetic body of the permanent magnet and the permanent magnet insertion portion are in contact on two surfaces, and the protrusion and the protrusion receiving portion are respectively on contact surfaces that are in contact with each other along the radial direction of the rotor core. It is equipped.

As described above, according to an embodiment of the present invention, by forming a protrusion on one of the magnetized magnetic body of the permanent magnet and the mutual contact surface of the permanent magnet insertion unit and providing the protrusion receiving part on the other, the permanent magnet is set position Can be arranged in

As a result, balancing of the rotor can be improved.

In addition, since the use of a resin for fixing the permanent magnet is excluded, the manufacturing cost due to the use of the resin can be significantly reduced.

In addition, it is possible to stably maintain a state in which the permanent magnets are aligned at a set position, so that generation of vibration and noise can be significantly suppressed.

In addition, since the permanent magnets can be stably maintained in an aligned state at a set position, a quiet driving and high-speed driving area can be secured.

In addition, by forming a coating portion on the magnetic body of the permanent magnet and forming a projection or a projection receiving portion on the coating portion, it is possible to reduce the manufacturing cost.

In addition, by forming the coating portion of the permanent magnet on the surface corresponding to the outer wall of the permanent magnet insertion portion, the permanent magnet can be brought close to the void, thereby improving the magnetic flux density of the void.

In addition, the alignment of the permanent magnet can be stably maintained by making the magnetic body of the permanent magnet and the permanent magnet insertion portion contact from two sides.

In addition, the magnetic body of the permanent magnet and the permanent magnet insertion part are contacted from two sides, and the rear end is in contact along the rotation direction of the rotor core, so that the alignment of the permanent magnet can be more stably maintained when the rotor core is rotated. have.

In addition, the magnetic body and the permanent magnet insertion part are combined with a first tolerance, and the protrusion and the protrusion receiving part are combined with a second tolerance that is smaller than the first tolerance, so that the magnetic body and the rotor core can be easily combined. have.

In addition, since the magnetic force between the protrusion and the protrusion receiving part acts larger after magnetization, the positional alignment of the permanent magnet can be more stably maintained.

1 is a cross-sectional view of a state of use of a rotor of a rotating electric machine according to an embodiment of the present invention,
Figure 2 is a cross-sectional view of the rotor of Figure 1,
Figure 3 is an enlarged view of the permanent magnet and the permanent magnet insertion portion of Figure 2,
4 is an enlarged view of the permanent magnet of FIG. 3,
5 is a modified example of the protrusion and protrusion receiving portion of FIG. 3,
6 is another embodiment of the protrusion and protrusion receiving portion of FIG. 3,
7 is a modified example of the protrusion and the protrusion receiving portion of FIG. 6,
8 is another embodiment of the protrusion and protrusion receiving portion of FIG. 3,
9 is another embodiment of the protrusion and protrusion receiving portion of FIG. 3,
Figure 10 is an enlarged view for explaining the coupled state of the protrusion and the protrusion receiving portion of Figure 9;
11 is another embodiment of the protrusion and protrusion receiving portion of FIG. 3,
12 is an enlarged view of the protrusion and the protrusion receiving portion of FIG. 11;
13 is another embodiment of the protrusion and the protrusion receiving portion of FIG. 3,
14 is an enlarged view of the protrusion and the protrusion receiving portion of FIG. 13;
15 is another embodiment of the protrusion and protrusion receiving portion of FIG. 3,
16 is an enlarged view of the protrusion and protrusion receiving portion of FIG. 15;
17 is a modified example of the protrusion receiving portion of FIG. 16,
18 is a view for explaining a method of manufacturing a rotor of a rotating electric machine according to an embodiment of the present invention;
19 is a view for explaining the step of preparing the permanent magnet of FIG. 18;
20 and 21 are views for explaining a step of fixing the permanent magnet of FIG. 18, respectively.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings. In the present specification, the same/similar reference numerals are assigned to the same/similar configurations even in different embodiments, and the description is replaced with the first description. The singular expression used in the present specification includes a plural expression unless the context clearly indicates otherwise. In addition, in describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification and should not be construed as limiting the technical idea disclosed in the present specification by the accompanying drawings.

1 is a cross-sectional view of a rotor of a rotating electric machine according to an embodiment of the present invention. As shown in Fig. 1, the rotor 200 of the rotating electric machine of this embodiment includes a permanent magnet 260 and a rotor core 220.

The rotor 200 of the rotating electric machine of this embodiment is rotatably provided with an air gap G inside the stator 150. The rotor 200 is configured to be rotated by a rotating magnetic field formed by the stator 150. The void G is formed, for example, about 0.6 to 0.7 mm. The rotor 200 may be configured to be rotatable at several thousands to tens of thousands of RPM. The rotor 200 of the rotating electric machine according to the present embodiment may be applied to, for example, a traction motor that drives a wheel for driving a vehicle.

The stator 150 includes, for example, a stator core 151 and a stator coil 160 wound around the stator core 151. The stator core 151 is configured by insulatingly laminated circular electrical steel sheets 152. The stator core 151 is configured with a plurality of slots 151a and teeth 151b.

The stator coil 160 is configured to form a rotating magnetic field when power is applied. The stator coil 160 is wound in a preset pattern via, for example, the plurality of slots 151a.

In this embodiment, a case in which the rotor 200 is implemented as an inner rotor rotatably provided inside the stator 150 is exemplified, but is not limited thereto. In addition, in the present embodiment, the rotor 200 is applied to an electric motor that rotates inside the stator 150 when power is applied to the stator 150, but is not limited thereto. The rotor 200 may be applied to a generator or a generator combined motor.

A frame 110 is provided outside the stator 150. The stator 150 may be inserted into the frame 110 and configured to be supported by the frame 110.

The frame 110 includes, for example, an accommodation space for accommodating the stator 150.

The frame 110 includes, for example, a cylindrical portion 110a corresponding to the shape of the stator 150 and a bracket 110b provided on one or both sides of the cylindrical portion 110a. In the present embodiment, a case in which brackets 110b are provided on both sides of the cylindrical portion 110a is illustrated, but this is only an example and is not limited thereto. Bearings 115 rotatably supporting the rotation shaft 210 of the rotor 200 are provided in the bracket 110b, respectively.

The frame 110 may be configured such that an internal accommodation space is airtightly blocked from the outside. An oil L for cooling may be provided inside the frame 110. The oil L may be composed of, for example, transmission oil.

The oil (L) is, for example, when the rotor 200 is stopped, the stator 150 and a part of the rotor 200 to be submerged in the inside of the frame 110 at a level (water level). Can be charged. Accordingly, the stator 150 and the rotor 200 may be in contact with the oil L and cooled by the oil L.

An oil circulation unit 120 may be provided in the frame 110 to circulate the oil L. The oil circulation unit 120 may include, for example, an oil pipe 120a in which a flow path of oil L is formed, and an oil pump provided in the oil pipe 120a to pump the oil L ( 120b) and a heat exchanger 120c for heat-exchanging and cooling the oil L. One side of the heat exchanger 120c is provided with a blower fan 120d for forcibly blowing air toward the heat exchanger 120c. According to this configuration, the oil L inside the frame 110 may be drawn out of the frame 110 and cooled while being circulated, and then supplied back to the inside of the frame 110. Accordingly, the stator 150 and the rotor 200 may be cooled by the cooled oil L.

The frame 110 may be provided with an oil supply unit 120e to supply oil L to the stator 150 and the rotor 200, for example. The oil supply unit 120e may be configured to supply oil L to the upper regions of the stator 150 and the rotor 200, for example. More specifically, the oil supply unit 120e may be configured to supply oil L to a boundary region between the stator 150 and the frame 110. In the present embodiment, a case in which the oil supply unit 120e is disposed (formed) on the inner surface of the frame 110 is illustrated, but this is only an example and is not limited thereto.

Meanwhile, the rotor 200 includes a rotor core 220 and a permanent magnet 260. The rotor 200 may be configured such that different magnetic poles (N pole and S pole) are alternately arranged along the circumferential direction. The rotor 200 may be configured to have, for example, eight magnetic poles.

The rotor core 220 may be configured by insulating and laminating circular electrical steel sheets 222, for example. A rotation shaft 210 is provided at the center of the rotor core 220. The rotation shaft 210 is configured to have a long length so as to protrude to both sides of the rotor core 220. Both sides of the rotation shaft 210 are rotatably supported by the bearings 115, respectively. A permanent magnet insertion part 230 is formed through the rotor core 220 so that the permanent magnet 260 can be inserted in the axial direction. In the present embodiment, the case in which the magnetic poles of the rotor 200 are formed as eight and the permanent magnet insertion portions 230 are implemented as eight is exemplified, but this is only an example and is not limited thereto. End rings 240 are provided at both ends of the rotor core 220, for example. The end ring 240, for example, is configured to block both ends of the permanent magnet insertion portion 230, respectively. Accordingly, the movement of the permanent magnet 260 in the axial direction may be suppressed.

2 is a cross-sectional view of the rotor 200 of FIG. 1, FIG. 3 is an enlarged view of the permanent magnet 260 and the permanent magnet insertion part 230 of FIG. 2, and FIG. 4 is a view of the permanent magnet 260 of FIG. It is an enlarged view. 2 and 3, the rotor core 220 includes a circular electrical steel plate 222. A rotation shaft hole 224 is formed through the center of the electrical steel sheet 222 so that the rotation shaft 210 can be inserted. A permanent magnet insertion part 230 into which a permanent magnet 260 is inserted is formed around the rotation shaft hole 224.

The permanent magnet 260 has, for example, a rectangular cross-sectional shape. The permanent magnet 260 is composed of a neodymium (Nd) magnet.

Since the permanent magnet 260 contains a relatively large amount of steel as a main component, corrosion (oxidation) may occur when disposed in the air.

Since the permanent magnet 260 of the rotor 200 of the rotating electric machine of this embodiment is placed in an environment in contact with the oil L inside the frame 110, the surface of the permanent magnet 260 has oil ( The oil film is formed by contacting with L). Accordingly, the contact between the magnetic body 262 and the air of the permanent magnet 260 is suppressed, so that the occurrence of corrosion of the magnetic body 262 can be suppressed or alleviated.

The permanent magnet 260 of this embodiment is inserted into the permanent magnet insertion unit 230 in the state of the magnetic body 262 before magnetization, and the magnetic body 262 is magnetized while being inserted into the permanent magnet insertion unit 230 Formed by Each of the permanent magnets 260 is configured to be inserted into each of the permanent magnet insertion units 230 along the axial direction.

The permanent magnet insertion part 230 is configured to have a rectangular cross-sectional shape so that the permanent magnet 260 can be inserted.

The permanent magnet insertion part 230 connects the inner wall 230a and the outer wall 230b disposed opposite to each other along the radial direction of the rotor core 220, and the inner wall 230a and the outer wall 230b. It has both sidewalls 230c.

The permanent magnet 260 includes a magnetic body 262 and a coating part 270 formed on the surface of the magnetic body 262 as shown in FIG. 4.

The magnetic body 262 has a rectangular parallelepiped shape having a thin thickness.

The permanent magnet 260 is configured to contact the inner wall 230a of the permanent magnet insertion part 230.

The coating part 270 is formed on a surface in contact with the inner wall 230a.

The outer surface of the magnetic body 262 on which the coating portion 270 is not formed is configured to be coupled with the permanent magnet insertion portion 230 with the first tolerance T1. Accordingly, since the magnetic body 262 and the permanent magnet insertion part 230 are coupled with a relatively large distance (first tolerance (T1)), the magnetic body 262 and the permanent magnet insertion part 230 Combining can be facilitated.

The coating part 270 is constituted by, for example, epoxy. As is well known, the coating part 270 is formed on the surface of the magnetic body 262 to prevent corrosion and/or loss of the permanent magnet 260. The coating part 270 may further include aluminum (Al) and nickel (Ni). The coating part 270 is formed, for example, about 30 to 60 microns (µm). In this embodiment, the coating part 270 is a protrusion 271 or a protrusion receiving part 241 for position alignment of the permanent magnet 260 with respect to the rotor core 220 when it is coupled to the rotor core 220. ) Is formed on an outer surface that faces (contacts) the rotor core 220 for formation.

The permanent magnet insertion part 230 and the permanent magnet 260 are coupled to each other to have a first tolerance T1. Here, the first tolerance T1 is formed, for example, about 0.5 to 1 mm.

On the other hand, a protrusion 271; is formed protruding on any one of the mutual contact surfaces of the magnetized magnetic body 262 and the permanent magnet insertion part 230 of the permanent magnet 260, and the magnetic body 262 and the permanent magnet insertion part A protrusion receiving portion 241; is formed on the other of the mutual contact surfaces of 230 to accommodate the protrusion 271.

The protrusion 271 may be formed, for example, on the coating part 270. The protrusion is formed of the same material as the coating part 270. The protrusion 271 is formed integrally with the coating part 270 when the coating part 270 is formed. The protrusion receiving part 241 is formed in the permanent magnet insertion part 230.

The protrusion 271 is configured to have a rectangular cross-sectional shape. The protrusion 271 includes both sidewalls 272 disposed in parallel with each other and end surfaces 273 connecting the sidewalls. The projections 271 are formed, for example, in plural. In this embodiment, the protrusions 271 are formed of a pair (two) spaced apart from each other along the longitudinal direction of the coating part 270, but this is only an example and is not limited thereto.

Referring back to FIGS. 2 and 3, the protrusion receiving part 241 may be formed on the inner wall 230a of the permanent magnet insertion part 230. The protrusion receiving portion 241 may include both sidewalls 242 disposed in parallel with each other and end surfaces 243 connecting the sidewalls.

The protrusion 271 and the protrusion receiving part 241 are configured to be coupled to each other by having a second tolerance T2 smaller than the first tolerance T1. The second tolerance T2 may be formed to be less than 0.5 mm, for example.

On the other hand, the protrusion 271 and the protrusion receiving part 241 may be configured to be coupled (forced fit) with a predetermined clamp. The length L1 between both side walls 272 of the protrusion 271 may be equal to or finely larger than the length L2 between both side walls 242 of the protrusion receiving portion 241. Accordingly, when the protrusion 271 and the protrusion receiving portion 241 are coupled, a clamp may act between the protrusion 271 and the protrusion receiving portion 241.

With this configuration, when the protrusion 271 of the magnetic body 262 is pressed against the protrusion receiving part 241 of the permanent magnet insertion part 230, the protrusion 271 is inside the protrusion receiving part 241 Can be inserted (press-fitted) into. At this time, since clamps are applied between both sidewalls of the protrusion 271 and both sidewalls of the protrusion receiving part 241, the magnetic body 262 can maintain a state coupled to the permanent magnet insertion part 230. have.

When the permanent magnet 260 (actually, when the magnetic body 262 is inserted), a magnetic core (not shown) is disposed outside the rotor core 220, respectively, and the magnetization of each magnetic body 262 can be made. The permanent magnet 260 may be magnetized along the radial direction of the rotor core 220. The permanent magnet 260 may have magnetic poles (N pole, S pole) having different outer and inner surfaces. In addition, different magnetic poles (N pole, S pole) may be alternately formed on the side of the void (G) of the permanent magnets 260 arranged in succession along the circumferential direction of the rotor core 220. .

When the magnetization of each magnetic body 262 is completed, each of the permanent magnets 260 may be in close contact with the permanent magnet insertion part 230 by magnetic force. Since the protrusion 271 and the protrusion receiving part 241 have a second tolerance T2 that is smaller than the first tolerance T1 between the permanent magnet 260 and the permanent magnet insertion part 230, the Since the distance between the protrusion 271 and the protrusion receiving part 241 is close to the distance between the permanent magnet 260 and the permanent magnet insertion part 230, the protrusion 271 and the protrusion receiving part 241 A stronger magnetic force acts between them.

In addition, since the magnetic force acting between the protrusion 271 and the protrusion receiving part 241 is significantly larger than the centrifugal force acting on the permanent magnet 260 when the rotor 200 rotates, the permanent magnet 260 ) Is able to stably maintain a state in close contact with the inner wall 230a of the permanent magnet insertion unit 230 despite the action of the centrifugal force.

In the rotor 200 of the rotating electric machine of the present embodiment, the permanent magnet 260 is aligned at the position set by the protrusion 271 and the protrusion receiving part 241, and is initially aligned by magnetic force even after magnetization. Since it can stably maintain, high-speed rotation (eg, 7000 to 25000 RPM) can be secured.

The permanent magnet 260 of the rotor 200 of the rotating electric machine of the present embodiment stably maintains the initial positional alignment, thereby increasing the total harmonic distortion (THD) due to the displacement of the permanent magnet 260 Is suppressed, noise generation due to an increase in TDD can be suppressed.

In addition, the permanent magnet 260 of the rotor 200 of the rotating electric machine of the present embodiment stably maintains the initial positional alignment, thereby increasing the harmonics and spikes due to the unalignment of the permanent magnet 260. ) Since voltage generation is suppressed, a high-speed operation area can be secured without deteriorating the function.

In addition, since the permanent magnet 260 of the rotor 200 of the rotating electric machine of the present embodiment stably maintains the initial positional alignment, balancing is improved (maintained), so that the bearing 115 is forced to The occurrence of wear can be suppressed.

5 is a modified example of the protrusion and the protrusion receiving portion of FIG. 3. As shown in FIG. 5, the permanent magnet 260 includes a magnetic body 262 and a coating part 270 formed on the surface of the magnetic body 262. A protrusion 271a is formed on the coating part 270. The protrusion 271a is formed to protrude from the coating part 270. The protrusion 271a is formed of the same material as the coating part 270. The protrusions 271a are formed as a pair spaced apart from each other.

The protrusion 271a includes both side walls 272a and an arc-shaped convex surface 273a.

Both side walls 272a of the protrusion 271a are formed parallel to each other.

The protrusion receiving portion 241a has a cross-sectional shape corresponding to the cross-sectional shape of the protrusion 271a. The protrusion receiving portion 241a includes both side walls 242a disposed in parallel with each other and a concave surface 243a corresponding to the convex surface 273a. Thereby, when the protrusion 271a and the protrusion receiving part 241a are coupled, the protrusion 271a is guided to the inside of the protrusion receiving part 241a by the convex surface 273a, and the protrusion 271a The combination of can be facilitated.

Here, both sidewalls 272a of the protrusion 271a and both sidewalls 242a of the protrusion receiving portion 241a may be configured to be forcibly fitted with each other by having a preset clamp.

As a result, the magnetic body 262 of the permanent magnet 260 is imprinted by the permanent magnet insertion part 230 and then maintained in a coupled state by fastening of the protrusion 271a and the protrusion receiving part 241a.

6 is another embodiment of the protrusion and the protrusion receiving portion of FIG. 3. 6, the permanent magnet 260 includes a magnetic body 262 and a coating part 270.

The coating part 270 is provided with a protrusion 271b. The protrusions 271b are implemented as a pair spaced apart from each other along the longitudinal direction of the coating part 270.

The protrusion 271b has a cross-sectional shape of a dovetail.

The protrusion 271b includes, for example, both sidewalls 272b disposed inclined with respect to the thickness (width) direction of the coating part 270 and end surfaces 273b connecting the both sidewalls 272b. do.

Both side walls 272b of the protrusion 271b are formed to gradually increase in width along the protruding direction.

The permanent magnet insertion portion 230 includes an inner wall 230a, an outer wall 230b disposed opposite to the inner wall 230a, and both side walls connecting both sides of the inner wall 230a and the outer wall 230b ( 230c).

A protrusion receiving part 241b is provided on the inner wall 230a to accommodate the protrusion 271b.

The protrusion receiving portion 241b has a dovetail groove cross-sectional shape corresponding to the cross-sectional shape of the protrusion 271b.

The protrusion receiving portion 241b includes both sidewalls 242b formed to be inclined with respect to the radial direction, and a connection portion 243b connecting the sidewalls 242b.

Here, both side walls 272b of the protrusion 271b and both side walls 242b of the protrusion receiving portion 241b may be configured to be coupled with a clamp.

According to this configuration, after the protrusion 271b and the protrusion receiving portion 241b are coupled, the lateral clearance between the protrusion 271b and the protrusion receiving portion 241b can be suppressed. Accordingly, after the protrusion 271b and the protrusion receiving portion 241b are coupled, the coupled state can be stably maintained.

7 is a modified example of the protrusion and the protrusion receiving portion of FIG. 6. As shown in FIG. 7, the permanent magnet 260 includes a magnetic body 262 and a coating part 270. The coating part 270 is provided with a protrusion 271c. The protrusions 271c are formed as a pair spaced apart along the length direction of the coating part 270.

The protrusion 271c is configured to have an arc-shaped cross section protruding along the width direction of the coating part 270.

The protrusion 271c includes a stone body 272c in which the center of the arc is disposed outside the coating part 270. Accordingly, the arc of the protrusion 271c is configured to have a length greater than a semicircle of the same radius.

Grooves 273c forming an acute angle are formed in boundary areas on both sides of the stone body 272c and the coating part 270, respectively.

The permanent magnet insertion portion 230 includes an inner wall 230a, an outer wall 230b, and both side wall portions 230c. A protrusion receiving portion 241c is formed on the inner wall 230a to accommodate the protrusion.

The protrusion receiving portion 241c has a cross-sectional shape corresponding to the shape of the protrusion 271c.

The protrusion receiving portion 241c is formed to have an arc-shaped cross section.

The protrusion receiving part 241c has a protrusion receiving part main body 242c whose center is formed closer to the side of the rotation shaft hole 224 than the inner wall 230a of the permanent magnet insertion part 230.

The protrusion receiving portion 241c has an inner wall 230a and attachments 243c formed on both sides of the boundary of the protrusion receiving unit 242c. Each of the attachments 243c has a substantially triangular cross section. Each of the attachments 243c is inserted into the groove 273c when coupled, so that the lateral clearance of the protrusion 271c can be suppressed.

According to this configuration, after the protrusion 271c is inserted into the protrusion receiving portion 241c, the lateral movement of the protrusion 271c can be suppressed. Accordingly, after the magnetic body 262 is coupled, the coupled state of the magnetic body 262 and the rotor core 220 can be stably maintained.

8 is another embodiment of the protrusion and the protrusion receiving portion of FIG. 3. As shown in FIG. 8, the permanent magnet 260 includes a magnetic body 262 and a coating part 270. The permanent magnet 260 is inserted into the permanent magnet insertion part 230 of the rotor core 220.

The permanent magnet insertion part 230 includes an inner wall 230a, an outer wall 230b, and both side walls 230c.

The coating part 270 is formed on an outer surface corresponding to the inner wall 230a of the permanent magnet insertion part 230.

A protrusion 271d is formed on the coating part 270.

The protrusion 271d is configured to have a triangular cross section.

The protrusion 271d protrudes from the coating part 270 in a triangular shape.

The protrusion 271d includes both side walls 272d disposed to cross each other.

The protrusions 271d are formed as a pair to be spaced apart along the longitudinal direction of the coating part 270.

A protrusion receiving part 241d is formed on the inner wall 230a of the permanent magnet insertion part 230 to accommodate the protrusion 271d.

The magnetic body 262 and the permanent magnet insertion part 230 are configured to have a first tolerance T1.

The protrusion 271d and the protrusion receiving portion 241d are configured to have a second tolerance T2 that is smaller than the first tolerance T1.

Meanwhile, an adhesive 250 is provided between the protrusion 271d and the protrusion receiving portion 241d.

The adhesive 250 may be applied to the outer surface of the protrusion 271d and/or the inner surface of the protrusion receiving portion 241d, respectively.

The adhesive 250 may be provided between the coating part 270 and the inner wall 230a of the permanent magnet insertion part 230.

With this configuration, the adhesive 250 is applied to the outer surface of the protrusion 271d of the permanent magnet 260 and the inner surface of the protrusion receiving part 241d, respectively, and the protrusion 271d is the protrusion receiving part ( 241d) to be inserted into the interior. The protrusion 271d and the protrusion receiving part 241d may be integrally fixedly coupled by the adhesive 250. Accordingly, after the protrusion 271d is coupled, a lateral clearance of the protrusion 271d may be suppressed.

FIG. 9 is another embodiment of the protrusion and the protrusion receiving part of FIG. 3, and FIG. 10 is an enlarged view for explaining a combined state of the protrusion and the protrusion receiving part of FIG. As shown in FIG. 9, the permanent magnet 260 and the permanent magnet insertion part 230 of the rotor 200 of the rotating electric machine of this embodiment may be configured such that two surfaces are in contact with each other.

The magnetic body 262 has a rectangular cross-sectional shape.

The permanent magnet insertion part 230 includes an inner wall 230a, an outer wall 230b, and both side walls (a first side wall 230c1 and a second side wall 230c2).

A coating part 270 is formed on an outer surface of the magnetic body 262 corresponding to the inner wall 230a.

The coating part 270 is provided with a protrusion 271e.

The protrusion 271e protrudes toward the inner wall 230a.

The protrusion 271e may be configured as one, for example.

The protrusion 271e may be formed at a position inclined toward one side with respect to the center of the magnetic body 262.

The protrusion 271e includes both sidewalls 272e and end surfaces 273e arranged parallel to each other.

The permanent magnet 260 may be configured such that the rear end of the coating part 270 and the rotor 200 are in contact with the permanent magnet insertion part 230 along the rotation direction.

In this embodiment, the rotor 200 is rotated in one direction (counterclockwise in the drawing), and the permanent magnet 260 is a rear end (right end in the drawing) based on the rotational direction of the rotor 200 ) Is configured to be in contact with the sidewall (first sidewall 230c1) of the permanent magnet insertion part 230.

The protrusion 271e may be formed at a position closer to the front end than to the rear end of the magnetic body 262.

Accordingly, after the magnetic body 262 is coupled, the coupled state of the magnetic body 262 may be more stably maintained.

A protrusion receiving part 241e is formed on the inner wall 230a of the permanent magnet insertion part 230 to accommodate the protrusion 271e.

The protrusion receiving portion 241e includes both side walls 242e and end surfaces 243e arranged parallel to each other.

The protrusion 271e and the protrusion receiving portion 241e are configured to have the second tolerance T2 as described above.

On the other hand, the magnetic body 262 and the permanent magnet insertion portion 230 may be coupled with a clamp.

More specifically, as shown in FIG. 10, of the side walls 272e of the protrusion 271e, the first side wall (left wall in the drawing) and the magnetic body 262 are distant from the rear end of the magnetic body 262. The length D1 between the rear ends is between the second side wall (right wall in the drawing) of the permanent magnet insertion unit 230 and the first side wall farther out of both side walls of the protrusion receiving unit 241e (left wall in the drawing). It may be formed equal to or finely larger than the length D2 of.

According to this configuration, the rear end of the magnetic body 262 of the permanent magnet 260 is in contact with the right wall of the permanent magnet insertion part 230, and the first side wall of the protrusion 271e and the protrusion receiving part 241e The first side wall of) can be inserted and coupled in a contacted state with a clamp.

Accordingly, the magnetic body 262 of the permanent magnet 260 may be stably maintained in a coupled state after being inserted into the permanent magnet insertion unit 230.

On the other hand, after the magnetization of the magnetic body 262, the magnetic force of the permanent magnet 260 is relatively small since the distance between the coating part 270 and the inner wall 230a is relatively small, so that the permanent magnet 260 is 230a).

In addition, when the rotor 200 rotates, the permanent magnet 260 is supported by contacting the rear end (right side wall) with the right wall of the permanent magnet insertion part 230 with respect to the rotation direction of the rotor 200. Since it is a state, the initial coupling state can be stably maintained.

11 is another embodiment of the protrusion and protrusion receiving portion of FIG. 3, and FIG. 12 is an enlarged view of the protrusion and protrusion receiving portion of FIG. 11 and 12, the rotor 200 of the rotating electric machine of this embodiment includes a rotor core 220 having a permanent magnet 260 and a permanent magnet insertion portion 230.

The permanent magnet 260 includes a magnetic body 262 and a coating portion 270 formed on the surface of the magnetic body 262.

The permanent magnet insertion part 230 includes an inner wall 230a, an outer wall 230b, and both side walls 230c facing each other along the radial direction of the rotor core 220.

The permanent magnet 260 is configured to contact the inner wall 230a of the permanent magnet insertion part 230.

Meanwhile, a protrusion 271f is formed on one of the mutual contact surfaces of the permanent magnet 260 and the permanent magnet insertion unit 230, and a protrusion receiving part 241f in which the protrusion 271f is accommodated is formed on the other. do.

In this embodiment, the protrusion 271f is formed in the permanent magnet insertion part 230, and the protrusion receiving part 241f is formed in the coating part 270.

The protrusion 271f and the protrusion receiving portion 241f are combined with a second tolerance T2 smaller than the first tolerance T1.

The protrusion 271f is configured to protrude from the inner wall 230a of the permanent magnet insertion part 230.

The protrusions 271f are formed in a pair spaced apart from each other along the longitudinal direction of the inner wall 230a.

Each of the protrusion receiving portions 241f is formed to be recessed in the coating portion 270.

The protrusion 271f has both side walls 272f and end surfaces 273f formed parallel to each other.

The protrusion receiving portion 241f includes both sidewalls 242f and connecting portions 243f formed parallel to each other.

Here, the protrusion 271f and the protrusion receiving portion 241f may be configured to be coupled with a preset clamp.

More specifically, the length L1 between the side walls 272f of the protrusion 271f is the same as or finely larger than the length L2 between the side walls 242f of the protrusion receiving portion 241f. I can.

With this configuration, the magnetic body 262 is pressed to be inserted into the permanent magnet insertion part 230 while the protrusion 271f is inserted into the protrusion receiving part 241f. The protrusion 271f is inserted into the protrusion receiving part 241f with a clamp, and the magnetic body 262 is coupled to the inside of the permanent magnet insertion part 230. The magnetic body 262 is maintained in a coupled state by the fastening of the protrusion 271f and the protrusion receiving portion 241f.

13 is another embodiment of the protrusion and the protrusion receiving part of FIG. 3, and FIG. 14 is an enlarged view of the protrusion and protrusion receiving part of FIG. 13. As shown in Fig. 13, the rotor 200 of the rotating electric machine of this embodiment is a rotor core 220 having a permanent magnet 260 and a permanent magnet insertion portion 230 into which the permanent magnet 260 is inserted. ).

The permanent magnet 260 includes a magnetic body 262 and a coating portion 270 formed on the surface of the magnetic body 262.

The permanent magnet insertion part 230 is an amount connecting the inner wall 230a and the outer wall 230b, the inner wall 230a and the outer wall 230b disposed to face each other along the radial direction of the rotor core 220 It has a side wall (230c).

The permanent magnet 260 is configured to contact the outer wall 230b of the permanent magnet insertion part 230.

Accordingly, the permanent magnet 260 may be disposed close to the air gap G.

According to this configuration, since the permanent magnet 260 is disposed close to the void G, the magnetic flux density of the void G can be increased.

The coating part 270 is formed on an outer surface of the magnetic body 262 corresponding to the outer wall 230b.

The permanent magnet 260 and the permanent magnet insertion part 230 are coupled to each other to have a first tolerance T1.

Since the outer surface other than the surface on which the coating part 270 is formed and the permanent magnet insertion part 230 are combined with a relatively large distance (first tolerance T1), coupling is facilitated.

A protrusion 271g is formed on the outer wall 230b. The protrusions 271g are formed to be spaced apart from each other along the longitudinal direction of the outer wall 230b.

A protrusion receiving part 241g in which the protrusion 271g is accommodated is formed in the coating part 270.

Each of the protrusions 271g includes both sidewalls 272g and end surfaces 273g disposed parallel to each other.

The protrusion accommodating portion 241g includes both side walls 242g and a connection portion 243g disposed parallel to each other to correspond to the protrusion 271g.

As described above, the protrusion 271g and the protrusion receiving portion 241g may be configured to be coupled with a clamp. Accordingly, the magnetic body 262 may be coupled to the permanent magnet insertion portion 230 and then maintained in a coupled state by fastening of the protrusion 271g and the protrusion receiving portion 241g.

On the other hand, in this embodiment, the permanent magnet 260 is configured to be in contact with the outer wall 230b of the permanent magnet insertion part 230, so that when the rotor 200 rotates, it acts on the permanent magnet 260 The centrifugal force to be applied may act on the outer wall 230b of the permanent magnet insertion part 230.

According to this configuration, the rotor 200 of the rotating electric machine according to the present embodiment can be applied to a rotating electric machine having a relatively low rotational speed (eg, 6000 RPM or less).

On the other hand, the rotor 200 of the rotating electric machine of the present embodiment is configured to be in contact with the outer wall 230b of the permanent magnet insertion part 230 so that the permanent magnet 260 is disposed closer to the void (G). , The magnetic flux density of the air gap G is increased, and output may be increased due to this.

15 is another embodiment of the protrusion and protrusion receiving portion of FIG. 3, FIG. 16 is an enlarged view of the protrusion and protrusion receiving portion of FIG. 15, and FIG. 17 is a modified example of the protrusion receiving portion of FIG. 16. As shown in Fig. 15, the rotor 200 of the rotating electric machine of this embodiment is a rotor core 220 having a permanent magnet 260 and a permanent magnet insertion portion 230 into which the permanent magnet 260 is inserted. ) Is provided.

The permanent magnet 260 includes a magnetic body 262 and a coating part 270.

The permanent magnet insertion part 230 has an inner wall 230a and both side walls 230c formed on both sides of the inner wall 230a and has a shape that is open to the outside.

Accordingly, the permanent magnet 260 can be inserted (coupled) from the side of the rotor core 220 along the radial direction of the rotor core 220.

According to this configuration, the insertion path of the permanent magnet 260 to the rotor core 220 can be significantly shortened, so that the combination of the rotor core 220 and the permanent magnet 260 can be facilitated. .

The permanent magnet 260 is configured to contact the inner wall 230a of the permanent magnet insertion part 230.

Accordingly, the permanent magnet 260 may be disposed close to the air gap G.

A coating part 270 is provided on a surface of the magnetic body 262 in contact with the inner wall 230a.

Meanwhile, a protrusion 271h is formed on one of the mutual contact surfaces of the coating part 270 and the outer wall 230b, and a protrusion receiving part 241h is provided on the other.

In this embodiment, the protrusion 271h is formed on the coating part 270, and the protrusion receiving part 241h is formed on the inner wall 230a of the permanent magnet insertion part 230.

The magnetic body 262 and the permanent magnet insertion part 230 have a first tolerance T1, and the protrusion 271h and the protrusion receiving part 241h are smaller than the first tolerance T1. It may be configured to be combined with a second tolerance (T2).

The protrusion 271h and the protrusion accommodating part 241h may be configured to be press-fitted with a preset clamp.

Here, the depth of the permanent magnet insertion part 230 may be formed to correspond to the thickness of the permanent magnet 260.

Accordingly, the outer surface of the permanent magnet 260 may be disposed close to (or partially coincide with) the outer peripheral surface of the rotor core 220.

In this embodiment, a case in which the outer surface of the permanent magnet 260 is formed in a linear shape is illustrated, but the outer surface of the permanent magnet 260 may be configured to have the same curvature as the outer circumference of the rotor core 220 . In this case, the outer surface of the permanent magnet 260 may be disposed on the same circumference as the outer circumference of the rotor core 220. Here, since the outer circumferential surface of the permanent magnet 260 is disposed on the same circumference as the rotor core 220, the permanent magnet 260 is the end of the tooth 151b of the stator core 151 and the void (G ) Can be spaced apart from each other.

Meanwhile, as shown in FIG. 17, a protrusion 232 protruding toward the permanent magnet 260 may be formed in the permanent magnet insertion part 230.

The protrusions 232 may be configured to protrude toward the permanent magnet 260 from both side walls 230c of the permanent magnet insertion part 230.

As a result, a gap between the permanent magnet insertion part 230 and the permanent magnet 260 may be reduced. According to this configuration, when the rotor 200 rotates, the generation of noise due to air contact with the gap between the permanent magnet insertion unit 230 and the permanent magnet 260 may be suppressed.

According to this configuration, the rotor 200 of the rotating electric machine of this embodiment can significantly improve the magnetic flux density (magnetic flux density) of the void G without increasing the magnet usage of the permanent magnet 260. I can. As a result, the output of the rotating electric machine can be improved without increasing the magnet usage of the permanent magnet 260.

18 is a view for explaining a method of manufacturing the rotor 200 of the rotating electric machine according to an embodiment of the present invention, FIG. 19 is a view for explaining the step of preparing the permanent magnet 260 of FIG. , FIGS. 20 and 21 are diagrams for explaining a step of fixing the magnetic body 262 of the permanent magnet 260 of FIG. 18, respectively. 1 to 4 and 18 together, the method of manufacturing the rotor 200 of the rotating electric machine according to the present embodiment, the magnetized magnetic body 262 of the permanent magnet 260 and the permanent magnet 260 are inserted. A protrusion 271 is formed on one of the mutual contact surfaces of the permanent magnet insertion unit 230 of the rotor core 220, and a protrusion receiving part 241 in which the protrusion 271 is accommodated is formed on the other. A step (S110) of providing the magnet 260 and the rotor core 220, respectively; Inserting the magnetic body 262 of the permanent magnet 260 into the permanent magnet insertion part 230 so that the protrusion is inserted into the protrusion receiving part 241 (S120); And forming the permanent magnet 260 by magnetizing the magnetic body 262 (S140).

1 to 4, the permanent magnet 260 includes a magnetic body 262 in a rectangular parallelepiped shape.

The permanent magnet 260 is coupled to the rotor core 220 in the state of a magnetic body 262 before magnetization.

The permanent magnet 260 is formed by magnetizing the magnetic body 262 coupled to the rotor core 220.

The permanent magnet 260 is magnetized such that different magnetic poles (N pole and S pole) are alternately arranged along the circumferential direction of the rotor core 220.

The rotor core 220 is formed by insulating laminated electrical steel sheet 222. A rotation shaft hole 224 into which the rotation shaft 210 is inserted is formed through the center of the rotor core 220. A permanent magnet insertion part 230 into which the permanent magnet 260 is inserted is formed through the rotor core 220 along the axial direction. The permanent magnet insertion portion 230 is configured to be spaced apart from each other along the circumferential direction.

The magnetic body 262 and the permanent magnet insertion part 230 are coupled to each other to have a first tolerance T1.

The magnetic body 262 of the permanent magnet 260 may be configured such that the permanent magnet insertion unit 230 and at least one surface are in contact with each other.

The protrusion 271 is formed in one of the magnetic body 262 of the permanent magnet 260 and the mutual contact area of the permanent magnet insertion part 230 and the protrusion 271 is accommodated in the other ( 241) is formed. The protrusion 271 and the protrusion receiving part 241 are coupled to each other by having a second tolerance T2 smaller than the first tolerance T1.

In the step (S110) of preparing the permanent magnet 260 and the rotor core 220, respectively, as shown in FIG. 19, the step of forming the magnetic body 262 of the permanent magnet 260 (S111) and the And forming a coating part 270 on the surface of the magnetic body 262 on which the protrusion 271 or the protrusion receiving part 241 is formed (S113). The step of preparing each of the permanent magnet 260 and the rotor core 220 (S110) further includes a step (S115) of forming a protrusion 271 or a protrusion receiving part 241 on the coating part 270 do.

The protrusion 271 is formed on the coating part 270 of the magnetic body 262, and the protrusion receiving part 241 is formed in the permanent magnet insertion part 230. In this embodiment, a case in which the protrusion 271 is formed on the coating portion 270 of the magnetic body 262 is illustrated, but this is only an example and is not limited thereto.

On the other hand, the manufacturing method of the rotor 200 of the rotating electric machine of the present embodiment, before the step (S141) of forming the permanent magnet 260 by magnetizing the magnetic body 262, the magnetic body of the permanent magnet 260 ( And a step (S130) of fixing 262 to the rotor core 220.

The step (S130) of fixing the magnetic body 262 of the permanent magnet 260 to the rotor core 220 is, for example, as shown in FIG. 20, the protrusion 271 and the protrusion receiving part 241 ) Forming to have a preset fastening (S131); And pressing the protrusion 271 and the protrusion receiving portion 241 (S132).

The protrusion 271 and the protrusion receiving portion 241 may be coupled to each other by having a second tolerance T2 smaller than the first tolerance T1.

The protrusion 271 and the protrusion accommodating part 241 may be respectively formed to have a preset clamp.

Fixing the magnetic body 262 of the permanent magnet 260 (S130), as shown in FIGS. 8 and 21, any one of the mutual contact surfaces of the protrusion 271d and the protrusion receiving part 241d Alternatively, the step of applying the adhesive 250 to the other; (S135) and the step of adhering the protrusion (271d) and the protrusion receiving portion (241d); (S136).

Meanwhile, referring to FIGS. 9 and 10 again, in the step (S110) of preparing the permanent magnet 260 and the rotor core 220, respectively, the magnetic body 262 of the permanent magnet 260 and the permanent magnet are inserted. The part 230 may be in contact with two surfaces, and the protrusion 271e and the protrusion receiving part 241e may be configured to be provided on contact surfaces that contact each other along the radial direction of the rotor core 220.

In the above, it has been shown and described with respect to specific embodiments of the present invention. However, the present invention may be implemented in various forms within a range not departing from its spirit or essential features, and thus the above-described embodiments should not be limited by the content of the detailed description.

In addition, even if the embodiments are not listed in detail in the above-described detailed description, they should be broadly interpreted within the scope of the technical idea defined in the appended claims. In addition, all changes and modifications included within the technical scope of the claims and their equivalents should be covered by the appended claims.

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Claims (20)

Permanent magnet; And
Including; a rotor core having a permanent magnet insertion portion formed through the axial direction so that the permanent magnet can be inserted in the axial direction,
In the permanent magnet, a magnetized magnetic body is inserted into the permanent magnet insertion portion, and magnetized after insertion,
A protrusion protruding from any one of the contact surfaces of the magnetized magnetic body and the permanent magnet insertion portion of the permanent magnet; And
Including; a protrusion receiving portion formed to receive the protrusion on the other one of the mutual contact surface of the magnetic body and the permanent magnet insertion unit,
A coating part is formed on the magnetic body, and the protrusion or the protrusion receiving part is formed on the coating part,
The magnetic body and the permanent magnet insertion portion are inserted and coupled to have a first tolerance of a relatively large interval,
The protrusion and the protrusion accommodating portion has a second tolerance of a small interval compared to the first tolerance, and the rotor of the rotating electric machine is inserted and coupled. delete The method of claim 1,
The permanent magnet insertion portion has an inner wall and an outer wall facing each other,
The rotor of a rotating electric machine, characterized in that the coating portion is formed to correspond to the inner wall. The method of claim 3,
The rotor of the rotating electric machine, characterized in that formed on the coating portion. The method of claim 3,
The rotor of a rotating electric machine, characterized in that the protrusion receiving portion is formed on the coating portion. The method of claim 3,
The magnetic body is a rotor of a rotating electric machine, characterized in that inserted into the interior of the permanent magnet insertion portion to contact any one of the inner wall and both side walls disposed on both sides of the inner wall. The method of claim 6,
The magnetic body is a rotor of a rotating electric machine, characterized in that inserted into the permanent magnet insertion portion in contact with the rear end along the rotation direction of the rotor core. The method of claim 3,
The rotor of a rotating electric machine, characterized in that the coating portion is formed on a surface corresponding to the outer wall. The method of claim 8,
The rotor of the rotating electric machine, characterized in that formed on the coating portion. The method of claim 9,
The rotor of a rotating electric machine, characterized in that the projection is formed symmetrically in the center of the magnetic body. The method of claim 1,
The permanent magnet insertion portion has an inner wall and both side walls formed on both sides of the inner wall and has a shape that is open to the outside,
The rotor of a rotating electric machine, characterized in that the coating portion is formed to correspond to the inner wall. delete The method according to any one of claims 1, 3 to 11,
Rotor of a rotating electric machine, characterized in that the protrusion and the protrusion receiving portion are fitted with a preset clamp. The method of claim 13,
A rotor of a rotating electric machine, characterized in that an adhesive is applied to one or the other of the protrusion and the mutual contact surface of the protrusion receiving portion. A protrusion is formed on one of the mutual contact surfaces of the magnetized magnetic body of the permanent magnet and the permanent magnet insertion portion of the rotor core formed through the axial direction so that the permanent magnet can be inserted in the axial direction, and the protrusion is accommodated in the other. Providing a permanent magnet and a rotor core to form a protrusion receiving portion, respectively;
Inserting a magnetic body of the permanent magnet into the permanent magnet insertion portion such that the protrusion is inserted into the protrusion receiving portion; And
Including; magnetizing the magnetic material to form the permanent magnet
The providing of the permanent magnet and the rotor core may include forming a coating part on the surface of the magnetic body of the permanent magnet on which the protrusion or the protrusion receiving part is formed, wherein the protrusion or the protrusion receiving part is the coating part. Is formed in
Before the step of forming the permanent magnet by magnetizing the magnetic material, fixing the magnetic material of the permanent magnet to the rotor core; further comprising,
The magnetic body and the permanent magnet insertion portion are inserted and coupled to have a first tolerance of a relatively large interval,
The method of manufacturing a rotor of a rotating electric machine in which the protrusion and the protrusion accommodating part are inserted and coupled to each other with a second tolerance of a smaller interval than the first tolerance. delete delete The method of claim 15,
The fixing of the magnetic body of the permanent magnet to the rotor core may include: forming the protrusion and the protrusion receiving portion to have a preset clamp; And pressing the protrusion and the protrusion accommodating part. 2. A method of manufacturing a rotor for a rotating electric machine, comprising: a. The method of claim 15,
The fixing of the magnetic body of the permanent magnet may include applying an adhesive to one or the other of the protrusion and the mutual contact surface of the protrusion receiving portion; And adhering the protrusion and the protrusion receiving part. 2. A method of manufacturing a rotor for a rotating electric machine, comprising: a. The method of claim 15,
In the step of preparing the permanent magnet and the rotor core, respectively, the magnetic body of the permanent magnet and the permanent magnet insertion portion are in contact with two surfaces, and the protrusion and the protrusion receiving portion are respectively on contact surfaces that are in contact with each other along the radial direction of the rotor core A method of manufacturing a rotor for a rotating electric machine, characterized in that it is provided.

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