KR101777957B1 - Apparatus for converting energy - Google Patents

Abstract

Provided is an energy converter with excellent mechanical strength. According to an embodiment of the present invention, the energy converter comprises a rotor electric steel sheet body having a hole formed therein; a permanent magnet auxiliary pole insertion hole protruding, in a radial direction, from the rotor electric steel body, and having a permanent magnet inserted therein; and a rotor electric steel plate assembly having a plurality of rotor electric steel plates stacked toward a shaft, wherein the plurality of rotor electric steel plates are formed with a main magnetic pole protruding, in the radial direction, from the rotor electric steel plate body.

Description

[0001] Apparatus for converting energy [0002]

The present invention relates to an energy conversion device, and more particularly, to a rotor electric steel plate assembly having a structure in which a plurality of rotor electric steel plates are stacked, and a single rotor electric steel plate includes a rotor electric steel plate body, And an energy conversion device in which a main pole and a main pole are integrally formed.

Energy conversion devices have been used in various fields. Examples of energy conversion devices include a generator that converts mechanical kinetic energy into electrical energy, and a motor that converts electrical energy into kinetic energy.

Transverse Flux type Switched Reluctance Generator (TFSRG), which is an example of an energy conversion device, has a high magnetic flux density, which can increase the output density and maximize the winding rate in the stator slot. Have.

Fig. 1 (a) shows a perspective view of a conventional transversely switched reluctance generator, and Fig. 1 (b) shows a sectional view thereof.

Referring to FIG. 1, a conventional transverse-flux switched reluctance generator 10 includes a stator 20 having a rotor 12 and a winding 22 formed thereon.

As shown in FIG. 1, the rotor 12 and / or the stator 20 have a structure in which an electric steel sheet is laminated so as to have a laminated boundary in a circumferential direction. The stator 20 has a structure in which permanent magnets 24a and 24b for initial start-up are attached to the upper and lower surfaces of the stator core 21, respectively.

Such a conventional transversal-type switched reluctance generator 10 can exhibit performance only when a magnetic circuit circulation path indicated by an arrow in Fig. 1 (b) is formed. However, since the leakage magnetic flux in the opposite direction to the illustrated magnetic circuit circulation path occurs in the permanent magnets 24a and the permanent magnets 24b, respectively, it has a limitation that it can not provide a sufficient starting voltage.

In addition, since the rotating magnetic pole constituting the rotor 12 had a plurality of divided structures, mechanical defects could be caused particularly in the high-speed rotation region.

Further, since the rotor 12 and / or the stator 20 are stacked so as to have a stacked boundary in the circumferential direction as shown in Fig. 1, there is a restriction that edge processing is difficult.

Fig. 2 (a) shows a perspective view of another conventional transversal switched reluctance generator, and Fig. 2 (b) shows its plan view.

Referring to FIG. 2, another conventional transversal-type switched reluctance generator 50 includes a stator 70 having a rotor 52 and a winding 72 formed thereon. As shown in FIG. 2, the rotor 52 and / or the stator 70 have a structure in which an electrical steel sheet is laminated so as to have a laminated boundary in a circumferential direction. A permanent magnet (54) is placed between the main pole of the rotor (52).

Such a conventional transverse magnet type switched reluctance generator 50 has a limitation in that an assembling process is complicated and a mechanism capable of separately fixing the permanent magnets is required because the permanent magnets must be assembled in a divided form.

Further, since each of the permanent magnets and each of the main magnetic poles is assembled to the surface of the rotor 52, it has a limitation that mechanical rigidity and robustness are low.

Further, since the rotor 52 and / or the stator 70 are stacked so as to have a lamination boundary in the circumferential direction as shown in FIG. 2, there is a restriction that edge processing is difficult.

Therefore, the present inventors have invented a generator which is mechanically stronger and superior in performance.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an energy conversion device having excellent mechanical strength.

Another technical problem to be solved by the present invention is to provide a simple energy conversion device.

It is another object of the present invention to provide an energy conversion device that minimizes a leakage magnetic flux.

The technical problem to be solved by the present invention is not limited to the above.

According to an aspect of the present invention, there is provided an energy conversion apparatus comprising: a rotor electric steel plate assembly provided at one side of a stator having a winding formed thereon and rotating about an axial direction; A permanent magnet auxiliary pole insertion hole protruding in the radial direction from the rotor electric steel plate body and having a permanent magnet inserted therein and a main pole protruding in the radial direction from the rotor electric steel plate body are integrally formed A plurality of rotor electrical steel plates formed of a plurality of rotor electrical steel plates may be stacked in the axial direction.

According to an embodiment of the present invention, the permanent magnet may include a first permanent magnet and a second permanent magnet having different magnetic poles in the radial direction, and the first permanent magnet and the second permanent magnet may be spaced apart from each other in the axial direction, And may be embedded in the permanent magnet auxiliary pole insert provided by the rotor electrical steel plate assembly.

According to an embodiment, the rotor electric steel plate body may include a yoke bar insertion hole in which a yoke bar electric steel plate assembly in which a plurality of yoke bar electric steel plates stacked in the radial width of the rotor electric steel plate body is embedded .

According to one embodiment, a single yoke bar electrical steel plate assembly may be embedded in the yoke bar insertion hole formed by stacking the plurality of electric steel plates.

According to one embodiment, the stacking direction of the yoke bar electrical steel plate assembly may be different from the stacking direction of the rotor electrical steel plate assembly, and the stacking direction of the yoke bar electrical steel plate assembly may be different from the circumferential direction of the rotor electrical steel plate assembly Lt; / RTI >

According to an embodiment of the present invention, the permanent magnet may include a first permanent magnet and a second permanent magnet having different magnetic poles in the radial direction, and the first permanent magnet and the second permanent magnet may be spaced apart from each other in the axial direction, Wherein the yoke bar electrical steel plate assembly is embedded in the permanent magnet auxiliary pole insert provided by the rotor electric steel plate assembly, and the lamination boundary of the yoke bar electrical steel plate assembly is formed by a magnetic field circulation loop circulating the windings of the first permanent magnet, the second permanent magnet, Path can be provided.

According to an embodiment, the edge of the permanent magnet auxiliary pole insertion hole may have a curved surface.

According to one embodiment, the lamination boundary of the rotor electrical steel plate assembly may be parallel to the magnetization direction of the permanent magnet.

A rotor electric steel plate body having a hollow inside the rotor electric steel plate assembly according to an embodiment of the present invention, a permanent magnet auxiliary pole insertion hole protruding radially from the rotor electric steel plate body and having a permanent magnet inserted therein, Since a plurality of rotor electrical steel plates integrally formed with the main pole protruding from the body in the radial direction are stacked in the axial direction, the mechanical strength is excellent, and the permanent magnets are not provided with a separate mechanism for fixing the permanent magnets The manufacturing process can provide a simple effect.

Fig. 1 (a) shows a perspective view of a conventional transversely switched reluctance generator, and Fig. 1 (b) shows a sectional view thereof.
Fig. 2 (a) shows a perspective view of another conventional transversal switched reluctance generator, and Fig. 2 (b) shows its plan view.
3 shows a perspective view of an energy conversion device according to an embodiment of the present invention.
4 shows a top view of an energy conversion device according to an embodiment of the present invention.
5 shows an enlarged view of a rotor electrical steel plate assembly according to an embodiment of the present invention.
6 is a view for explaining a magnetic field circulation path according to an embodiment of the present invention.
7 is a view for explaining a cogging torque reduction structure according to an embodiment of the present invention.
FIG. 8 is a graph illustrating a comparison of back electromotive force performance of an energy conversion apparatus according to an embodiment of the present invention.
FIG. 9 is a graph illustrating a cogging torque comparison experiment of an energy conversion apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also, in the drawings, the shapes and thicknesses of the structures are exaggerated for an effective description of the technical content.

Also, while the terms first, second, third, etc. in the various embodiments of the present disclosure are used to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. Thus, what is referred to as a first component in any one embodiment may be referred to as a second component in another embodiment. Each embodiment described and exemplified herein also includes its complementary embodiment. Also, in this specification, 'and / or' are used to include at least one of the front and rear components.

The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprises "or" having "are intended to specify the presence of stated features, integers, Should not be understood to exclude the presence or addition of one or more other elements, elements, or combinations thereof. Also, in this specification, the term "connection " is used to include both indirectly connecting and directly connecting a plurality of components.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 3 is a perspective view of an energy conversion apparatus according to an embodiment of the present invention, FIG. 4 is a plan view of an energy conversion apparatus according to an embodiment of the present invention, FIG. 5 is a cross- Lt; RTI ID = 0.0 > of < / RTI >

An energy conversion apparatus according to an embodiment of the present invention to be described below with reference to the drawings may be, for example, a motor that converts electrical energy into mechanical energy and / or a generator that converts mechanical energy into electrical energy. Hereinafter, for convenience of explanation, it is assumed that the energy conversion apparatus according to an embodiment of the present invention is a generator, but the technical idea of the present invention can also be applied to an electric motor.

3 to 5, an energy conversion apparatus 100 according to an embodiment of the present invention may include at least one of a rotor electric steel plate assembly 110 and a stator 160. The rotor electrical steel plate assembly 110 includes a rotor electrical steel body 121, a main pole 122, a permanent magnet auxiliary pole insertion port 124, a permanent magnet 126, a yoke bar insertion port 130, Bar electrical steel plate assemblies 132. As shown in FIG. The stator 160 may be provided with a winding 170. Hereinafter, each configuration will be described in detail.

Rotor electric steel plate assembly

The rotor electrical steel plate assembly 110 may be located inside or outside the stator 160 and may be movable relative to the stator 160. For example, the rotor electrical steel plate assembly 110 is provided inside the stator 160 to rotate the shaft (not shown) drawn into the shaft inlet 112 of the rotor electrical steel plate assembly 110 And can rotate relative to the stator 160 with respect to the axial direction (z axis).

Electric energy may be generated by a magnetic flux change between the rotor electric steel plate assembly 110 and the stator 160, which is generated in accordance with the rotation of the rotor electric steel plate assembly 110. For this purpose, the rotor electrical steel plate assembly 110 may be made of a steel sheet having excellent magnetic flux path characteristics and high mechanical strength, for example, silicon and steel.

5, the rotor electrical steel plate assembly 110 includes a plurality of rotor electrical steel plates 120a, 120b, 120c, ..., 120x, 120y, 120z stacked in the longitudinal direction (z- . At this time, the stacking boundary of the plurality of rotor electrical steel plates 120a, 120b, 120c, ..., 120x, 120y, and 120z forming the rotor electric steel plate assembly 110 is parallel to the magnetization direction of the permanent magnets can do.

The rotor electric steel plate assembly 110 includes an upper end region where the first type permanent magnet 126b is formed in the z axis direction, a lower end region where the second type permanent magnet 126a is formed, As shown in FIG.

At this time, the rotor electrical steel plates of the upper end region and the lower end region of the rotor electric steel plate assembly 110 are separated from the rotor main body 121 (i.e., the radial direction (the direction of r in Fig. 4) And the permanent magnet auxiliary pole insertion hole 124 projecting in the radial direction may be formed of an integral electric steel plate.

That is, a rotor electrical steel plate body 121 constituting each rotor electric steel plate, a main magnetic pole 122 radially shrouding in radial direction, and a permanent magnet auxiliary pole insertion port 124 protruding in a radial direction are integrally formed, Individual rotor electrical steel sheets are laminated to form a rotor electrical steel sheet assembly, which can improve mechanical strength.

The rotor electric steel plate body 121 constitutes the body of the rotor electric steel plate 120. The rotor electric steel plate body 121 is provided with a shaft inserting hole 112 therein, can do. The rotor electric steel plate body 121 may provide a shaft inserting hole 112 corresponding to the outer shape of the shaft.

The main pole 122 may be formed as a salient pole structure protruding in the radial direction from the rotor electric steel plate body 121. The main magnetic pole 122 may be arranged along the circumferential direction of the rotor electrical steel plate body 121 (direction c in FIG. 4). For example, the main pole 122 may be arranged along the circumferential direction of the rotor electric steel body 121.

The permanent magnet auxiliary pole insertion hole 124 may protrude in the radial direction from the rotor electric steel plate body 121 as a configuration for initial start-up. The permanent magnet auxiliary pole insertion hole 124 may be arranged along the circumferential direction of the rotor electric steel body 121. For example, the permanent magnet sub-pole insertion holes 124 may be arranged along the circumferential direction of the rotor electric steel body 121.

In addition, the permanent magnet sub-pole insertion hole 124 may provide an insertion port into which the permanent magnet 126 is inserted. Therefore, the permanent magnet 126 can be embedded inside the permanent magnet assist pole inserting hole 124 of the rotor electric steel plate 120 (see the permanent magnet inserting direction in FIG. 5). Accordingly, the permanent magnet 126 is not fixed to the surface of the rotor electrical steel plate 120 but is embedded and fixed, so that the permanent magnet 126 can be stably fixed at high speed rotation.

More specifically, the rotor electrical steel plates of the upper region constituting the rotor electrical steel plate assembly 110 may be laminated to provide the permanent magnet auxiliary pole insertion port into which the permanent magnets 126b are inserted. In the same manner, the rotor electric steel plates of the bottom area constituting the rotor electric steel plate assembly 110 are laminated, thereby providing the permanent magnet auxiliary pole insertion port into which the permanent magnet 126a is inserted. Accordingly, a plurality of rotor electrical steel plates are stacked in the upper and lower end regions of the rotor electric steel plate assembly 110, thereby providing a permanent magnet insertion hole 124 into which a single permanent magnet is inserted.

According to one embodiment, the permanent magnet sub-pole inserting port located in the upper region of the rotor electric steel plate assembly 110 and the permanent magnet sub-pole inserting port located in the lower end region of the rotor electric steel plate assembly 110, These different permanent magnets can be fixed. More specifically, the permanent magnet auxiliary pole insertion port located in the upper region of the rotor electric steel plate assembly 110 can embed and fix the permanent magnet 126b having the S pole toward the radial direction, The permanent magnet auxiliary pole insertion port located in the lower end region of the assembly 110 can embed and fix the permanent magnet 126a having the S pole toward the center.

Also, according to one embodiment, the permanent magnet auxiliary pole insertion port and the main pole may be alternately disposed along the circumferential direction. The first permanent magnet auxiliary pole, the second permanent magnet secondary pole, the second main pole, the eighth permanent magnet auxiliary pole, the first permanent magnet auxiliary pole, the second permanent magnet auxiliary pole, Eighth main stimulation order. At this time, the gap g1 between the first permanent magnet auxiliary pole and the first main magnetic pole may be shorter than the gap g2 between the first main magnetic pole and the second permanent magnet auxiliary pole. This can minimize leakage flux. In addition, since the permanent magnet auxiliary pole insertion port and the main pole are formed integrally with the rotor electrical steel plate, the leakage magnetic flux can be minimized.

Meanwhile, the rotor electrical steel sheet positioned at the end of the rotor electrical steel plate assembly 110 may be positioned between the upper end region and the lower end region of the rotor electrical steel plate assembly 110. The rotor electrical steel plate located in the recessed area of the rotor electrical steel plate assembly 110 may comprise a rotor electrical steel body 121. Thus, the rotor electrical steel plate positioned at the end of the rotor electrical steel plate assembly 110 may be spaced apart from the permanent magnet auxiliary pole inserting hole of the upper end region and the permanent magnet assist pole inserting end of the lower end region by d distance in the z axis direction . At this time, the distance d may correspond to the length of the opposing stator winding in the z-axis direction. That is, since the permanent magnet is not buried at the distance d, the amount of the permanent magnet used on the magnetic flux circulating path circulating the winding in the permanent magnet can be minimized.

According to one embodiment, the rotor electrical steel plates 120 are provided with yoke bar insertion holes 130 into which the yoke bar electrical steel plate assemblies 132 are inserted in the radial width of the rotor electrical steel plate body 121 can do. That is, by providing the yoke bar insertion port 130 in the rotor electric steel plate body 121, the rotor electric steel plates 120 are gradually drawn in the z-axis direction to embed the yoke bar electric steel plate assembly 132 Space can be provided. More specifically, the rotor electrical steel plates 120 constituting the top, bottom, and bottom regions of the rotor electrical steel plate assembly 110 may provide the yoke bar insertion port 130. Accordingly, the yoke bar insertion port 130 formed by the plurality of rotor electrical steel plates 120 can provide a space in which the single yoke bar electrical steel plate assembly 132 extending in the z-axis direction is embedded. Accordingly, it is possible to provide an effect that the yoke bar can be stably fixed even during high-speed rotation.

The stacking direction of the yoke bar electrical steel plates 132a, 132b, ..., 132m constituting the yoke bar electrical steel plate assembly 132 may be different from the lamination direction of the rotor electrical steel plates 120. [ For example, the yoke bar electrical steel plate assembly 132 may be configured such that the yoke bar electrical steel plates 132a, 132b, ... 132m are stacked in the circumferential direction (see c direction in Figure 4, yoke bar direction in Figure 5) . That is, the stacking boundary of the yoke bar electrical steel plates 132a, 132b, ..., 132m may be parallel to the intervening stator body 163. Since the yoke bar electrical steel plates and the rotor electrical steel plates have different lamination directions, mechanical strength can be reinforced.

The yoke bar electrical steel plate assembly 132 may be made of an electrical steel sheet having excellent magnetic flux path characteristics and having excellent mechanical strength, for example, silicon and steel.

The yoke bar electrical steel plate assembly 132 may be embedded in the yoke bar insertion port 130 in the z-axis direction (see the yoke bar insertion direction in FIG. 5). The yoke bar electrical steel plate assembly 132 may provide a magnetic flux circulation path between the permanent magnet 126 and the stator winding. The function of the yoke bar electrical steel plate assembly 132 will be described later.

Also, according to one embodiment, the yoke bar electrical steel plate assemblies 132 may be arranged along the circumferential direction of the rotor electrical steel body 121, for example, eight as shown . The circumferential length of a single yoke bar electrical steel plate assembly may correspond to the sum of the circumferential lengths of a single permanent magnet auxiliary pole insert and a pair of adjacent single main poles.

The rotor electrical steel plate assembly according to one embodiment of the present invention has been described above. Hereinafter, the stator according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG.

Stator

3 and 4, the stator 160 according to an embodiment of the present invention may include a stator body and a winding 170.

The stator body may be made of the same material as the rotor electrical steel sheet. For example, the stator body may be made of a steel sheet including silicon and steel. In addition, the stator body may be formed by stacking stator electrical steel plates (not shown) in the same direction as the rotor electrical steel plates, that is, in the z-axis direction.

The stator body may be spaced apart in the circumferential direction. For example, the stator body 12 may be positioned in the circumferential direction. Each stator body may, for example, have a "C" shape. More specifically, the stator body includes a first transverse stator body 162, a second transverse stator body 164, and a first transverse stator body 162 and a second transverse stator body 164, And an interrupted stator body 163 extending in the direction of the axis.

The stopped stator body 163 may be provided with a winding 170. The winding is a structure for forming a magnetic field corresponding to an applied electric signal, and may be provided in three phases, for example. That is, the winding 170 may be repeatedly arranged in the order of the first winding 170a, the second winding 170b, and the third winding 170c in the circumferential direction for a three-phase implementation.

The stator according to one embodiment of the present invention has been described above with reference to FIGS. 3 and 4. FIG. Hereinafter, a magnetic field circulation path according to an embodiment of the present invention will be described with reference to FIG.

6 is a view for explaining a magnetic field circulation path according to an embodiment of the present invention.

6, a magnetic circuit circulation path f according to an embodiment of the present invention includes a second transverse stator body 164, a winding 170, and a second transverse stator body 164 radially outward with respect to a second permanent magnet 126b. The first transverse stator body 162, the first permanent magnet 126a, and the yoke bar 132 in this order.

At this time, the laminated boundary of the yoke bar electrical steel plates 132 can provide a magnetic circuit circulation path in the z-axis direction on the magnetic circuit circulation path (f). Therefore, the stacking boundary of the yoke bar electrical steel plate assembly 132 according to the embodiment of the present invention extends in the magnetic circuit circulation path direction, thereby minimizing the leakage magnetic flux.

The magnetic circuit circulation path according to the embodiment of the present invention has been described above. Hereinafter, a cogging torque reduction structure according to an embodiment of the present invention will be described with reference to FIG.

7 is a view for explaining a cogging torque reduction structure according to an embodiment of the present invention. Fig. 7 corresponds to a partial enlarged view of the plan view of Fig.

7, the rotor electrical steel plate 120 is fixed to the stator 160 with a gap between the radially outer side of the rotor electrical steel plate 120 and the radially inner side of the stator 160, As shown in Fig.

The radially outer end 124a of the permanent magnet sub-pole inserting port 124 of the rotor electrical steel plate 120 may have a rounded shape when viewed in plan. The radially inner end 162a of the stator 160 may also have a rounded shape when viewed from the plane (xy plane). Since the radially outer end of the permanent magnet auxiliary pole inserting hole 124 and the radially inner end of the stator have a round shape, the instantaneous change amount of the magnetic flux can be reduced, and the cogging torque can be reduced.

Meanwhile, since the rotor electrical steel plate assembly 110 is laminated in the z-axis direction, it can be easily formed into a round shape when the permanent magnet auxiliary pole insertion port end 124a is viewed from the plane. Further, since the stator 160 is stacked in the z-axis direction, it is easy to manufacture the stator end 162a in a round shape when viewed from the plane. In the prior art described with reference to Figs. 1 and 2, since the rotor electrical steel plate and / or stator electrical steel plate has a structure laminated in the circumferential direction, when it is desired to process the end portion into a round shape when viewed from the plane, The boundary cracked or the electric steel sheet was bent. However, according to an embodiment of the present invention, since the boundary of the lamination of the electric steel plates is not seen when viewed from the plane, it is possible to provide an effect that deformation of the laminated electric steel plates does not occur even if the end portions are cut into a round shape through press working .

7, the cogging torque reduction structure according to an embodiment of the present invention has been described with reference to the upper end region of the rotor electrical steel plate assembly. However, The present invention is also applicable to the lower end region of the electromechanical steel plate assembly.

The cogging torque reduction structure according to the embodiment of the present invention has been described with reference to FIG. Hereinafter, results of performance comparison between the energy conversion apparatus according to an embodiment of the present invention and the energy conversion apparatus according to the related art will be described with reference to FIGS. 8 and 9. FIG.

FIG. 8 is a graph illustrating a comparison of back electromotive force performance of an energy conversion apparatus according to an embodiment of the present invention. FIG. 9 is a graph illustrating a cogging torque comparison experiment of an energy conversion apparatus according to an embodiment of the present invention.

8 and 9 are conventional energy conversion apparatuses described with reference to FIG. 2, and the present invention shown in FIGS. 8 and 9 corresponds to an embodiment of the present invention described with reference to FIGS. 3 to 7 Which corresponds to the energy conversion device. For the experiment, the prior art and the energy conversion device according to the present invention comprising 12 stator and winding, 8 rotor main pole, and 8 permanent magnet auxiliary pole were prepared. Particularly, in the case of the present invention, as described with reference to FIG. 7, the permanent magnet auxiliary pole end 124a and the stator end 162a are formed into a round shape.

Referring to FIG. 8, the energy conversion apparatus according to the prior art and the energy conversion apparatus according to an embodiment of the present invention show no significant difference in back EMF characteristics.

Referring to FIG. 9, the energy conversion device according to an embodiment of the present invention has significantly lower cogging torque than the energy conversion device according to the related art. That is, it can be seen that noise and vibration of the energy conversion apparatus according to an embodiment of the present invention can be reduced compared to the energy conversion apparatus according to the related art.

The energy conversion device according to an embodiment of the present invention is interpreted as a reduction in cogging torque because it provides a magnetic circulation path that minimizes the leakage magnetic flux.

As described above with reference to Figs. 3 to 9, the energy conversion device according to an embodiment of the present invention includes a rotor electric steel plate body, a permanent magnet auxiliary pole insertion hole protruded from the rotor electric steel plate body, It is possible to provide a mechanically robust effect.

Further, since the permanent magnet auxiliary pole insertion port is formed integrally with the rotor electrical steel plate, it is possible to provide an effect that a housing for fixing the permanent magnet is not required separately.

Also, since the permanent magnet and the yoke bar electric steel plate assembly are embedded in the rotor electric steel plate body, the energy conversion device according to an embodiment of the present invention can provide a permanent magnet and a yoke bar electric steel plate assembly And can be stably fixed.

Further, the lamination direction of the rotor electrical steel plates of the energy conversion device according to an embodiment of the present invention and the lamination direction of the yoke bar electrical steel plates cross each other, so that the mechanical strengths can be mutually reinforced.

In addition, the stacking boundary of the yoke bar steel plates of the energy conversion device according to an embodiment of the present invention can provide a continuous magnetic flux circulation path between the permanent magnet and the winding.

Further, the rotor electrical steel plates of the energy conversion device according to the embodiment of the present invention are laminated in the axial direction, so that the radial end portions of the rotor electrical steel plate can be easily processed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the invention.

100: energy conversion device
110: Rotor electric steel plate assembly
121: rotor electric steel plate body
122: Primary stimulus
124: permanent magnet auxiliary pole inserting port
126: permanent magnet
130: yoke bar insertion opening
132: yoke bar electric steel plate assembly
160: stator
170: Winding

Claims (9)

And a rotor electric steel plate assembly provided on one side of the stator formed with the windings and rotating about the axial direction,
The rotor electrical steel plate assembly includes:
A plurality of rotor electrical steel plates integrally formed with a rotor electrical steel plate body having a hollow inside thereof and a permanent magnet auxiliary pole insertion hole protruding radially from the rotor electrical steel body and having a permanent magnet inserted therein are stacked in the axial direction ,
Wherein the rotor electric steel plate body includes a yoke bar insertion hole into which a plurality of yoke bar electric steel plates are buried in a yoke bar electric steel plate assembly stacked in a circumferential direction of the rotor electric steel plate assembly, And a rotor provided on a rear surface in a radial direction of the rotor electric steel plate body from a pole insertion hole,
Wherein the laminate boundary of the yoke bar electrical steel plate assembly provides a magnetic field circulation path in the axial direction. The method according to claim 1,
Wherein the permanent magnets comprise a first permanent magnet and a second permanent magnet having different magnetic poles in the radial direction and the first permanent magnet and the second permanent magnet are spaced apart from each other in the axial direction, Wherein the permanent magnets are embedded in the permanent magnet sub-pole insertion openings provided by the permanent magnets. The method according to claim 1,
Wherein the rotor electrical steel plate assembly further comprises a main pole protruding in the radial direction from the rotor electrical steel body. The method according to claim 1,
Wherein a single yoke bar electrical steel plate assembly is embedded in a yoke bar insertion hole formed by stacking the plurality of electric steel plates. delete delete The method according to claim 1,
Wherein the permanent magnets comprise a first permanent magnet and a second permanent magnet having different magnetic poles in the radial direction and the first permanent magnet and the second permanent magnet are spaced apart from each other in the axial direction, The permanent magnet auxiliary pole is inserted in the insertion hole provided by the permanent magnet,
Wherein the magnetic circuit circulation path includes a lamination boundary of the yoke bar electrical steel plate assembly, a winding of the first permanent magnet, the second permanent magnet, and the stator. The method according to claim 1,
And the corner of the permanent magnet auxiliary pole insertion port has a curved surface. The method according to claim 1,
Wherein the lamination boundary of the rotor electric steel plate assembly is parallel to the magnetization direction of the permanent magnet.

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