KR102496393B1 - Rotor and Motor having the same - Google Patents

Abstract

The present invention is a core disposed on the outer circumferential surface of the rotating shaft; and insulators 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 comprising: an insulator unit body; a stepped portion protruding inwardly with a step based on the upper surface of the insulator unit body; and a rotor including a guide portion formed to protrude from the stepped portion in an axial direction of the rotation shaft, and a motor including the same.

Description

A rotor and a motor including the same {Rotor and Motor having the same}

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

A permanent magnet synchronous motor (PMSM) is used as a drive motor used as a power source for eco-friendly vehicles such as hybrid vehicles or electric vehicles. These permanent magnet type synchronous motors require maximization of the performance of the permanent magnets in order to achieve maximum performance under limited layout conditions.

In particular, neodymium (Nd) in a permanent magnet used in a permanent magnet synchronous motor (PMSM) improves the strength of the permanent magnet, and dysprosium (Dy) improves resistance to high temperature demagnetization. However, rare earth (Nd, Dy) metal components of these permanent magnets are limitedly stored in some countries such as China, and are very expensive and fluctuate greatly in price.

In order to improve this, the application of an induction motor is recently being reviewed, but there are excessive limitations in size increase such as volume and weight in order to exhibit the same motor performance.

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

The field winding type synchronous motor can exhibit the performance of the motor with an optimal increase of about 10% compared to the permanent magnet type synchronous motor (PMSM). It is replacing the permanent magnet of the synchronous motor (PMSM).

In such a field winding type synchronous motor, not only the stator (stator) but also the rotor are formed in a structure in which winding coils are wound. In order to reduce loss and increase efficiency, the field winding type synchronous motor needs to maximize the stator and rotor winding capacity. The split core method, which is assembled by inserting an insulator, is applied.

In the split-core field winding type synchronous motor, the rotor is arranged with a certain gap inside the stator, and when power is applied to the stator and rotor coils, a magnetic field is formed, and the rotor rotates by the magnetic action generated between them. this is done

Therefore, the field winding type synchronous motor of the split core type is easy to manufacture because it is easy to wind the coil on each core block, and has the effect of increasing the winding area ratio, reducing copper loss (loss) and increasing efficiency.

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

Also, the coil wound around the insulator is fixed to the terminal through a method such as welding or soldering to maintain tension.

However, in the case of a coil fixed through welding, soldering, or the like in a device requiring high motor rotation or high durability, there is a problem in that disconnection and separation occur, resulting in defects.

Accordingly, the present invention is to solve the above problems, to provide a rotor that can increase torque by increasing the space factor of the coil and facilitate assembly, and a motor including the same.

Another object of the present invention is to provide a rotor having an insulator capable of preventing coil disconnection and separation by maintaining coil tension, and a motor including the same.

The problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned herein will be clearly understood by those skilled in the art from the following description.

The above object according to an embodiment of the present invention, the core disposed on the outer circumferential surface of the rotating shaft; and insulators 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 comprising: an insulator unit body; a stepped portion protruding inwardly with a step based on the upper surface of the insulator unit body; and a guide portion formed to protrude from the stepped portion in the axial direction of the rotating shaft.

The guide unit may include a guide unit body; and an insert hole disposed on an upper surface of the guide unit body and having an area of the terminal disposed therein.

In addition, the guide part body may include a guide part body formed to protrude from the stepped part in the axial direction of the rotation shaft and a flange formed to protrude from an end of the guide part body in a direction perpendicular to the longitudinal direction of the guide part body. can

And, the flange may be formed to protrude in a circumferential direction.

In addition, a coil may be wound along an outer circumferential surface of the guide unit body.

Here, the guide part may be disposed spaced apart from the insulator unit body in an inward direction.

In addition, at least two guide parts are disposed in the stepped part, and the height of any one of the guide parts is higher than the height of the other one.

Meanwhile, the core includes a boss disposed on an outer circumferential surface of the rotation shaft and a plurality of core blocks disposed on a side surface of the boss along a circumferential direction, and the insulator unit may be disposed above and below the core block. .

The above object according to an embodiment of the present invention, the stator; A rotor is rotatably disposed on the stator, and the rotor is achieved by a motor provided as the above-described rotor.

In the rotor according to one embodiment of the present invention having the configuration described above, a relatively wide winding space can be secured by using the guide part formed in the insulator unit. Accordingly, the rotor can increase the torque by increasing the space factor of the coil.

In addition, since the coil is wound on the guide part, it is possible to prevent disconnection and detachment of the coil by maintaining the tension of the coil.

1 is a perspective view showing a motor according to an embodiment of the present invention;
2 is a cross-sectional view taken along line AA of FIG. 1;
3 is a perspective view showing a rotor according to an embodiment of the present invention;
4 is a view showing a core of a rotor according to an 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 on a guide part 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 illustrating another embodiment of an insulator unit of a rotor according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as second and first may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a second element may be termed a first element, and similarly, a first element may be termed a second element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

It is 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, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

In the description of the embodiment, in the case where one component is described as being formed “on or under” another component, the upper (above) or lower (below) (on or under) includes both those formed by direct contact between two components or by indirectly placing one or more other components between the two components. In addition, when expressed as 'on or under', it may include the meaning of not only the upward direction but also the downward direction based on one component.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, 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 the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, it should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings, but the same or corresponding components regardless of reference numerals are given the same reference numerals, and overlapping descriptions thereof will be omitted.

1 and 2, the motor 1 according to an embodiment of the present invention includes a rotor 2, a housing 10, a stator 20, and a coil 30 wound around the rotor 2, and A rotation shaft 40 may be included. 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 the outer shape of the motor 1, and between the upper housing 11 and the lower housing 12, the rotor 2, the stator (20), and a coil (30) may be disposed. And, as shown in FIGS. 1 and 2 , the rotating shaft 40 may be disposed to pass through the housing 10 .

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

The coil 30 induces electrical interaction with the stator 20 to induce rotation of the rotor 2 or to 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 rotates while the rotor 2 rotates by the applied driving current. to drive external parts (engine, etc.). In this case, the pulley belt may be connected to a crankshaft of an engine in the case of a vehicle.

On the other hand, when the motor operates as an alternator, an alternating current is generated by rotating the rotor 2 while a pulley belt (not shown) rotates by driving the engine. The generated alternating current can be converted into direct current and supplied to external components (batteries, etc.).

Referring to FIGS. 2 to 10 , the rotor 2 according to one embodiment of the present invention may include a core 100 and an insulator having 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 shaft insertion hole 130 into which the rotation shaft 40 is inserted may be formed at the center. Therefore, the boss 110 may be disposed on the outer circumferential surface of the rotating shaft 40 . Here, the rotating shaft 40 may be inserted and fixed to the boss 110 and rotate integrally with the boss 110 .

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

For example, when the plurality of core blocks 120 are disposed on the side of the boss 110 along the circumferential direction, the coupling protrusions 121 of the core block 120 are placed on the side of the boss 110 at predetermined intervals. The core 100 may be formed by sliding coupling to the formed slide groove 112 .

In describing the core 100 of the rotor 2, an example in which a plurality of core blocks 120 are coupled to the side surface of the boss 110 is taken as an example, but is not necessarily limited thereto, and the boss 110 and the plurality of core blocks 120 are used as an example. The core block 120 may be integrally formed.

The insulator may be disposed above and below the core 100 . Here, the insulator may be formed by arranging a plurality of insulator units 200 along the circumferential direction of the core 100 .

Hereinafter, the insulator disposed below the core 100 differs from the insulator disposed above the core 100 only in the arrangement position, and thus, the insulator disposed above and the insulator unit 200 forming the insulator will be explained about.

As shown in FIG. 5 , the insulator disposed above the core 100 may be formed by arranging a plurality of insulator units 200 along a circumferential direction. In this case, the plurality of insulator units 200 disposed in the insulator may be integrally formed.

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

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

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

An outer guide 220 may be disposed outside the insulator unit body 210 , and an inner guide 230 may be disposed inside the insulator unit body 210 .

Here, 'outside' refers to the outside of the insulator unit body 210 in a radial direction from the center of rotation of the core 100, and 'inside' refers to the radius from the center of rotation of the core 100. The direction means the inside with respect to the insulator unit body 210.

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

As shown in FIG. 8 , the stepped portion 231 may protrude inward in a stepwise manner with a predetermined height h based on the upper surface 211 of the insulator unit body 210 . Accordingly, when winding the coil 30 , the stepped portion 231 may serve as a reference for the inner winding range of the coil 30 .

As shown in FIGS. 7 and 8 , the guide portion 240 may be formed to protrude from one surface 231a of the stepped portion 231 in the axial direction of the rotation shaft 40 . More specifically, the guide portion 240 may be formed to protrude from one surface 231a of the stepped portion 231 in a direction opposite to a direction in which the insulator unit 200 is seated on the core 100 .

And, as shown in FIG. 8 , the guide part 240 may be disposed to be spaced apart from the insulator unit main body 210 in an inward direction.

Here, the guide unit 240 may include a guide unit body 241 and an insert hole 242 formed on an upper surface of the guide unit body 241 .

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

The guide unit body 241a may be formed to protrude from one surface of the stepped unit 231 in the axial direction of the rotation shaft 40 . And, as shown in FIG. 10 , the coil 30 may be wound around the guide body 241a. Accordingly, the coil 30 can maintain tension.

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

The flange 242b may prevent the coil 30 from being separated when the coil 30 is wound around the guide body 241a.

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

Therefore, since the guide portion 240 includes a flange 242b that is spaced apart from the insulator unit body 210 at a predetermined interval d and protrudes in the circumferential direction, as shown in FIG. 11, When winding the coil 30, the space factor of the coil 30 can be easily improved.

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

In addition, since the terminal 50 may be selectively disposed in the insert hole 242 of each of the plurality of insulator units 200 disposed on the rotor 2, it may correspond to various winding methods of the coil 30. .

On the other hand, the terminal 50 is fixed by being press-fitted or bonded to the insert hole 242 as an example, but is not necessarily limited thereto and may be fixed to the guide part 240 by an insert injection method.

Accordingly, the coil 30 may be wired to the terminal 30 inserted into the insert hole 242 after winding on the guide part body 241a. Accordingly, the separation distance between the coil 30 wound around the guide unit body 241a and the terminal 50 is minimized, thereby facilitating wiring. In addition, as the separation distance between the coil 30 and the terminal 50 is minimized, the coupling force between the coil 30 and the terminal 50 increases and a space for wiring can be minimized.

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

Hereinafter, in describing the insulator unit 200a, the same components as those of the above-described insulator unit 200 are denoted by the same reference numerals or the same names, and thus descriptions 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, and at least two guide portions disposed on the stepped portion 231. Here, the height of any one of the guide parts may be formed higher than the height of the other one.

That is, at least two guide parts are disposed in the stepped part 231 of the insulator unit 200a, and the height of any one of the guide parts may be higher than that of the other one.

Hereinafter, in describing the height of one of the guide parts and the height of the other, the two guide parts are divided into a first guide part 240a and a second guide part 240b to clarify the description of the guide part. to explain.

Therefore, as shown in FIGS. 12 and 13 , the insulator unit 200a includes an insulator unit body 210, an outer guide 220, an inner guide 230 having a stepped portion 231, and a first guide portion ( 240a) and a second guide part 240b.

Here, each of the first guide part 240a and the second guide part 240b may be formed to protrude from one surface of the stepped part 231 in the axial direction of the rotating shaft 40, and may be formed to protrude from the insulator unit main body 210 to the inner side. It may be arranged spaced apart in the direction.

In addition, each of the first guide part 240a and the second guide part 240b may include a guide part body 241 and an insert hole 242 formed on an upper surface of the guide part body 241 . Also, the guide unit body 241 may include a guide unit body 241a and a flange 242b.

As shown in FIG. 13, the height h1 of the guide body 241a of the first guide portion 240a is higher than the height h2 of the guide body 241a of the second guide portion 240b. It can be.

Accordingly, when the coil 30 is wound on each of the first guide part 240a and the second guide part 240b, the difference in height between the first guide part 240a and the second guide part 240b (h1- Since h2) occurs, interference between the coils 30 is minimized, and the insulation effect can be improved.

Although the above has been described with reference to the embodiments of the present invention, those skilled in the art can variously modify and modify the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be changed. And, it should be construed that the differences related to these modifications and changes are included in the scope of the present invention, which is defined in the appended claims.

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

Claims (9)

a core disposed on an outer circumferential surface of the rotating shaft; and
Including insulators disposed above and below the core,
The insulator includes a plurality of insulator units disposed along a circumferential direction of the core,
The insulator unit is
Insulator unit body;
a stepped portion protruding inwardly with a step based on the upper surface of the insulator unit body; and
And a guide portion formed to protrude from the stepped portion in the axial direction of the rotation shaft,
The guide unit may include a guide unit body; And an insert hole disposed on the upper surface of the guide unit body,
The coil wound around the insulator unit main body is connected to a terminal inserted into the insert hole. delete According to claim 1,
The guide part body includes a guide part body formed to protrude from the stepped part in an axial direction of the rotating shaft and a flange formed to protrude from an end of the guide part body in a direction perpendicular to a longitudinal direction of the guide part body. According to claim 3,
The flange is formed to protrude in the circumferential direction of the rotor. According to claim 3,
The coil is wired to the terminal after winding along the outer circumferential surface of the guide unit body. According to claim 1,
The guide part is disposed spaced apart from the insulator unit body in an inward direction. According to claim 1,
At least two guide parts are disposed in the stepped part, and the rotor, characterized in that the height of any one of the guide parts is higher than the height of the other one. According to claim 1,
The core includes a boss disposed on an outer circumferential surface of the rotation shaft and a plurality of core blocks disposed on a side surface of the boss along a circumferential direction, and the insulator unit is disposed above and below the core block. stator;
A rotor rotatably disposed on the stator,
The rotor is a motor provided with the rotor according to any one of claims 1 and 3 to 8.

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