KR20170055733A - Rotor and Motor having the same - Google Patents

Abstract

The present invention relates to a rotor, which increase a space factor to increase torque and facilitates assembly, and a motor including the same. The rotor comprises: a core disposed on an outer circumference surface of a rotary shaft; and an insulator disposed in an upper part and a lower part of the core, wherein the insulator includes a plurality of insulator units disposed along a circumferential direction of the core. The insulator units comprises: an insulator unit main body; a stepped part protruding inwardly with respect to an upper surface of the insulator unit main body; and a guide part protruding in an axial direction of the rotary shaft in the stepped part.

Description

Rotor and motor having the same < RTI ID = 0.0 >

The present invention relates to a rotor and a motor including the same.

A permanent magnet type synchronous motor (PMSM) is used as a driving motor used as a power source of an environmentally friendly automobile such as a hybrid vehicle or an electric vehicle. Such permanent magnet type synchronous motors need to maximize the performance of the permanent magnets in order to maximize performance in constrained layout conditions.

In particular, neodymium (Nd) in a permanent magnet used in a permanent magnet synchronous motor (PMSM) improves the strength of a permanent magnet, and dysprosium (Dy) improves demagnetization resistance. However, rare earth (Nd, Dy) metal components of these permanent magnets are buried in a limited number of countries such as China and are very expensive and prone to price fluctuations.

In order to improve this, the application of the induction motor has been studied recently. However, in order to exhibit the same motor performance, there is an excessive restriction on the volume increase of the volume and weight.

Accordingly, development of a field winding synchronous motor (WRSM) to replace the permanent magnet type synchronous motor (PMSM) is further advanced.

The field winding synchronous motor is able to demonstrate the performance of the motor with an optimum increase of about 10% compared with the permanent magnet type synchronous motor (PMSM). When the coil is wound on the rotor (rotor) It replaces the permanent magnet of synchronous motor (PMSM).

Such a field winding synchronous motor is formed not only of a stator (stator) but also of a rotor in which winding coils are wound. In order to reduce losses and increase efficiency, the field winding synchronous motor must maximize the winding rate of the stator and the rotor. In addition, the rotor core block is divided into not only the stator but also the rotor, In which an insulator is inserted and assembled.

In the field winding synchronous motor of the split core type, a rotor is disposed with a certain gap inside the stator, and a magnetic field is formed when power is applied to the coils of the stator and the rotor. By the magnetic action generated therebetween, .

Therefore, the field winding synchronous motor of the divided core type has an effect that the coil can be easily wound on each of the core blocks, so that it is easy to manufacture, the winding dot rate is increased, the copper loss is reduced, and the efficiency is increased.

At this time, the insulator coupled with the core block performs insulation between the rotor core and the coil.

The coil wound around the insulator is fixed to the terminal through welding or soldering to maintain the tension.

However, in a device requiring a high rotation speed or high durability of a motor, there is a problem that disconnection and disconnection phenomenon occurs in the case of a fixed coil through a method such as welding or soldering, resulting in defective.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a rotor and a motor including the same that can increase a torque by increasing a space factor of a coil and facilitate assembly.

Another object of the present invention is to provide a rotor including an insulator that can maintain the tension of a coil and prevent disconnection and disconnection of the coil, and a motor including the same.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here can be understood by those skilled in the art from the following description.

According to an embodiment of the present invention, the above object is achieved by a core comprising: a core disposed on an outer circumferential surface of a rotating shaft; And an insulator disposed at upper and lower portions of the core, wherein the insulator includes a plurality of insulator units disposed along a circumferential direction of the core, and the insulator unit includes: an insulator unit main body; A stepped portion protruding inwardly in a stepped manner with reference to an upper surface of the insulator unit main body; And a guide portion protruding in the axial direction of the rotary shaft at the stepped portion.

The guide portion includes a guide portion main body; And an insert hole disposed on an upper surface of the guide portion main body, the insert hole being formed in a region of the terminal.

The guide body includes a guide body protruding in the axial direction of the rotary shaft at the stepped portion and a flange protruding in a direction perpendicular to the longitudinal direction of the guide body at the end of the guide body .

The flange may be formed to protrude in the circumferential direction.

Further, the coil may be wound along the outer peripheral surface of the guide body.

Here, the guide portion may be disposed to be spaced inward from the insulator unit body.

In addition, at least two of the guide portions are disposed in the step portion, and the height of one of the guide portions is higher than the height of the other.

The core includes a boss disposed on an outer circumferential surface of the rotating shaft, and a plurality of core blocks disposed on a side surface of the boss in a circumferential direction, and the insulator unit may be disposed on upper and lower portions of the core block .

According to an aspect of the present invention, there is provided a stator comprising: a stator; And a rotor rotatably disposed on the stator, wherein the rotor is achieved by a motor provided with the rotor described above.

The rotor according to an embodiment of the present invention having the above-described structure can secure a relatively large winding space by using the guide portion formed in the insulator unit. Accordingly, the rotor can increase the torque by increasing the space factor of the coil.

Further, since the coil is wound on the guide portion, the tension of the coil can be maintained, thereby preventing disconnection and disconnection of the coil.

1 is a perspective view showing a motor according to an embodiment of the present invention,
Fig. 2 is a cross-sectional view showing the line AA in Fig. 1,
3 is a perspective view illustrating a rotor according to an embodiment of the present invention,
Figure 4 is a view of a core of a rotor according to one embodiment of the present invention,
5 is a view showing an insulator of a rotor according to an embodiment of the present invention,
6 is a view showing a coupling relationship between a core of a rotor and an insulator unit according to an embodiment of the present invention,
7 to 9 are a perspective view, a side view and a front view showing an insulator unit of a rotor according to an embodiment of the present invention,
10 is a view showing a coil wound around a guide portion of an insulator unit of a rotor according to an embodiment of the present invention,
11 is a view showing a part of a coil wound around an insulator unit body of a rotor according to an embodiment of the present invention,
12 and 13 are a perspective view and a front view showing another embodiment of the insulator unit of the rotor according to the embodiment of the present invention.

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

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

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

In the description of the embodiments, when an element is described as being formed "on or under" another element, the upper or lower (lower) (on or under) all include that the two components are in direct contact with each other or that one or more other components are indirectly formed between the two components. Also, when expressed as 'on or under', it may include not only an upward direction but also a downward direction based on one component.

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

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

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

1 and 2, a motor 1 according to an embodiment of the present invention includes a rotor 2, a housing 10, a stator 20, a coil 30 wound around the rotor 2, And may include a rotary shaft 40. Here, the rotor 2 may be a rotor 2 according to an embodiment of the present invention to be described later.

The housing 10 may include an upper housing 11 and a lower housing 12.

The upper housing 11 and the lower housing 12 of the housing 10 are coupled to each other to form an outer shape of the motor 1. Between the upper housing 11 and the lower housing 12, (20), and a coil (30). 1 and 2, the rotary shaft 40 may be arranged to penetrate through the housing 10. As shown in Fig.

A stator 20 may be provided inside the housing 10 of the motor 1. [ A rotor 2 is provided on the inner side of the stator 20 and a coil 30 is wound on the rotor 2.

The coil 30 may induce electrical interaction with the stator 20 to induce the rotation of the rotor 2 or induce power generation by the rotating rotor 2. [

For example, when the motor 1 operates as a starter motor, a pulley belt (not shown) connected to the rotating shaft 40 of the rotor 2 is rotated So that external components (such as an engine) can be driven. At this time, the pulley belt can be connected to the crankshaft of the engine in the case of a vehicle.

On the other hand, when the motor operates as an alternator, the pulley belt (not shown) is rotated by the driving of the engine to rotate the rotor 2 to generate alternating current. The generated alternating current can be converted into direct current and supplied to an external component (such as a battery).

2 to 10, the rotor 2 according to an embodiment of the present invention may include an insulator having a core 100 and a plurality of insulator units 200. [

Referring to FIG. 4, the core 100 may include a boss 110 and a plurality of core blocks 120.

The boss 110 may be formed in a cylindrical shape and a rotation axis insertion hole 130 through which the rotation axis 40 is inserted may be formed at the center. Therefore, the boss 110 can be disposed on the outer circumferential surface of the rotary shaft 40. Here, the rotary shaft 40 is inserted and fixed to the boss 110 and can rotate integrally with the boss 110.

The plurality of core blocks 120 may be disposed along the circumferential direction on the side surface of the boss 110 at predetermined intervals.

For example, when a plurality of core blocks 120 are disposed along the circumferential direction on the side surface of the boss 110, the coupling protrusions 121 of the core block 120 are disposed at predetermined intervals on the side surface of the boss 110 So that the core 100 can be formed by slidingly coupling to the formed slide groove 112.

A plurality of core blocks 120 are coupled to the side surface of the boss 110. However, the present invention is not limited to this example, and the boss 110 and a plurality of The core block 120 may be integrally formed.

The insulator may be disposed at the upper and lower portions of the core 100. Here, the insulator may be formed by disposing a plurality of insulator units 200 along the circumferential direction of the core 100.

Hereinafter, the insulator disposed at the lower portion of the core 100 is different from the insulator disposed at the upper portion of the core 100 only at the arrangement position, and the insulator unit 200, which forms the insulator and the insulator disposed thereon, Will be described.

As shown in FIG. 5, the insulator disposed on the top of the core 100 may be formed by disposing a plurality of insulator units 200 along the circumferential direction. At this time, the plurality of insulator units 200 disposed on the insulator may be integrally formed.

As shown in FIG. 6, the insulator may be formed by disposing a plurality of insulator units 200 on the core 100 separately.

7 to 9, the insulator unit 200 includes an insulator unit main body 210, an outer guide 220, an inner guide 230 having a stepped portion 231, and a guide portion 240 .

The insulator unit main body 210 may be disposed so as to surround the core 100. The coil may be wound around the insulator unit main body 210.

The outer guide 220 may be disposed on the outer side of the insulator unit body 210 and the inner guide 230 may be disposed on the inner side of the insulator unit main body 210.

Here, 'outside' refers to the outside of the insulator unit body 210 in the radial direction from the center of rotation of the core 100, 'inside' refers to the radius from the center of rotation of the core 100, The inside of the insulator unit body 210 is referred to as the inside.

Thus, the coil 40 can be wound on the insulator unit body 210 between the outer guide 220 and the inner guide 230.

The stepped portion 231 may protrude inwardly with a predetermined height h with respect to the upper surface 211 of the insulator unit main body 210 as shown in Fig. Accordingly, during winding of the coil 30, the stepped portion 231 can be a reference for the inner winding range of the coil 30. [

The guide portion 240 may be formed to protrude in the axial direction of the rotary shaft 40 from one surface 231a of the stepped portion 231 as shown in FIGS. More specifically, the guide portion 240 may be formed to protrude in a direction opposite to a direction in which the insulator unit 200 is seated on the core 100 at one surface 231a of the stepped portion 231. [

8, the guide unit 240 may be disposed to be spaced apart from the insulator unit body 210 in the inward direction.

The guide portion 240 may include an insert hole 242 formed on the upper surface of the guide portion main body 241 and the guide portion main body 241.

The guide portion main body 241 may include a guide portion body 241a and a flange 242b.

The guide body 241a may be formed to protrude in the axial direction of the rotary shaft 40 from one surface of the stepped portion 231. As shown in FIG. 10, the coil 30 may be wound on the guide body 241a. Thereby, the coil 30 can maintain the tension.

The flange 242b may protrude from the end of the guide body 241a in a direction perpendicular to the longitudinal direction of the guide body 241a.

The flange 242b can prevent the coil 30 from being detached when the coil 30 is wound on the guide body 241a.

Referring to FIGS. 7 and 9, the flange 242b may be formed to protrude in the circumferential direction.

11, since the guide portion 240 includes the flange 242b that is spaced apart from the insulator unit body 210 by a predetermined distance d and protrudes in the circumferential direction, The drop rate of the coil 30 during winding of the coil 30 can be easily improved.

The insert hole 242 may be formed on the upper surface of the guide portion 240 so that one area of the terminal 50 is disposed. Here, one region of the terminal 50 can be press-fitted or bonded to the insert hole 242 and fixed.

Since the terminal 50 can be selectively disposed in the insert hole 242 of each of the plurality of insulator units 200 disposed in the rotor 2, the terminal 50 can cope with various winding methods of the coils 30 .

Meanwhile, the terminal 50 is fixedly inserted into the insert hole 242, and is fixed to the guide portion 240 by an insert injection method.

Accordingly, the coil 30 can be connected to the terminal 30 inserted into the insert hole 242 after winding on the guide body 241a. Accordingly, the distance between the coil 30 wound around the guide body 241a and the terminal 50 is minimized, so that the connection can be facilitated. Also, as the distance between the coil 30 and the terminal 50 is minimized, the coupling force between the coil 30 and the terminal 50 is increased and the space for wiring can be minimized.

12 and 13 are a perspective view and a front view showing another embodiment of the insulator unit 200a of the rotor according to the embodiment of the present invention.

In the following description of the insulator unit 200a, the same components as those of the insulator unit 200 described above are denoted by the same reference numerals or the same names, and a description thereof will be omitted.

The insulator unit 200a may include an insulator unit main body 210, an outer guide 220, an inner guide 230 having a stepped portion 231 formed therein, and at least two guide portions disposed on the stepped portion 231. Here, the height of one of the guide portions may be higher than the height of the other guide portion.

That is, at least two guide portions are disposed on the stepped portion 231 of the insulator unit 200a, and the height of one of the guide portions may be higher than the height of the other guide portion.

In order to clarify the description of the guide part, the two guide parts are divided into a first guide part 240a and a second guide part 240b .

12 and 13, the insulator unit 200a includes an insulator unit main body 210, an outer guide 220, an inner guide 230 having a stepped portion 231, a first guide portion 240a and a second guide portion 240b.

Each of the first guide portion 240a and the second guide portion 240b may be formed to protrude in the axial direction of the rotary shaft 40 from one side of the stepped portion 231, As shown in FIG.

Each of the first guide portion 240a and the second guide portion 240b may include a guide portion main body 241 and an insert hole 242 formed on the upper surface of the guide portion main body 241. [ The guide portion main body 241 may include a guide portion body 241a and a flange 242b.

The height h1 of the guide body 241a of the first guide portion 240a is formed to be higher than the height h2 of the guide body 241a of the second guide portion 240b .

The difference between the heights of the first guide portion 240a and the second guide portion 240b between the first guide portion 240a and the second guide portion 240b when the coil 30 is wound is h1- the interference between the coils 30 is minimized and the insulation effect can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be understood that the present invention can be changed. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

1: motor 2: rotor
10: housing 20:
100: core 110: boss
120: core block 200, 200a: insulator unit
210: insulator unit main body 220: outer guide
230: inner guide 240: guide part
241: guide part body 242: insert hole

Claims (9)

A core disposed on an outer peripheral surface of the rotary shaft; And
And an insulator disposed above and below the core,
Wherein the insulator includes a plurality of insulator units disposed along a circumferential direction of the core,
The insulator unit
An insulator unit main body;
A stepped portion protruding inwardly in a stepped manner with reference to an upper surface of the insulator unit main body; And
And a guide portion protruding in the axial direction of the rotating shaft at the stepped portion. The method according to claim 1,
The guide portion
Guide unit main body; And
And an insert hole disposed on an upper surface of the guide portion main body, the insert hole being formed in a region of the terminal. 3. The method of claim 2,
Wherein the guide body includes a guide body protruding in the axial direction of the rotation shaft at the step and a flange protruding in a direction perpendicular to the longitudinal direction of the guide body at an end of the guide body. The method of claim 3,
Wherein the flange is formed to protrude in the circumferential direction. The method of claim 3,
Wherein the coil is wound along an outer peripheral surface of the guide body. The method according to claim 1,
Wherein the guide portion is spaced inward from the insulator unit main body. The method according to claim 1,
Wherein at least two of the guide portions are disposed on the stepped portion, wherein the height of one of the guide portions is higher than the height of the other one of the guide portions. The method according to claim 1,
Wherein the core includes a boss disposed on an outer circumferential surface of the rotating shaft, and a plurality of core blocks disposed along a circumferential direction on a side surface of the boss, wherein the insulator unit is disposed at the top and bottom of the core block. Stator;
And a rotor rotatably disposed on the stator,
The motor is provided with the rotor according to any one of claims 1 to 8.

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