KR20190007907A - Motor - Google Patents

Abstract

The present invention relates to a motor which can be compactly designed while minimizing a fusing point. The motor comprises: a rotation axis; a rotor in which the rotation axis is arranged; a stator arranged on the outside of the rotor; and a housing accommodating the rotor and the stator. The stator comprises: a stator core; a plurality of coils wound around the stator core; and a terminal. The coil is arranged, in parallel, between a power terminal and a neutral point. The terminal arranged at the power terminal and the neutral point comprises a hook unit which is arranged with a region of the coil.

Description

Motor {Motor}

An embodiment relates to a motor.

A motor is a device that converts electrical energy into rotational energy using the force that a conductor receives in a magnetic field. Recently, as the use of motors has expanded, the role of the motor has become important. Particularly, as the electric field of automobiles rapidly advances, the demand of motors applied to steering systems, braking systems, and design systems is greatly increasing.

Typically, the motor includes a rotating shaft, a rotor coupled to the rotating shaft, and a stator disposed inside the housing. At this time, a stator is installed with a gap along the circumference of the rotor. And a coil for forming a rotating magnetic field is wound around the stator to induce electrical interaction with the rotor to induce rotation of the rotor. As the rotor rotates, the rotating shaft rotates to generate a driving force.

In particular, the 3-phase BLDC (Brushless DC) motor has been developed to maintain the characteristics of a 3-phase DC motor while eliminating the brush that acts as a commutator in a normal 3-phase DC motor. And a stator in which three coils, that is, U-phase, V-phase, and W-phase coils are wound.

Here, the three-phase BLDC motor may be a three-phase power source, a three-phase motor controlled by u, v, and w, having an inverter circuit connected to a single-phase power source and itself rectifying a single- .

The three-phase BLDC motor may use a terminal pin for three power inputs. At this time, the coil and the terminal pin are electrically connected by a method such as soldering or fusing. Here, the fusing process requires expensive equipment, and since the electrical connection is not smooth and defects frequently occur, a great deal of management is required. Accordingly, minimizing the fusing process is advantageous in terms of cost and quality.

Particularly, in the case of a small-sized motor of 1 kW or less, it is necessary to perform coil winding operation on a narrow area, so that a large amount of force is required in winding, which requires a large capacity of the equipment and deteriorates the quality of the winding.

Therefore, in order to reduce the size of the coil, the parallel circuit must be increased. However, if the parallel circuit is increased, the fusing point is increased and there is a fear of cost increase and quality deterioration.

A motor is provided that minimizes the fusing point using a hooked terminal pin to implement a Y-connection in a parallel structure.

That is, the present invention provides a motor that uses four terminal pins to perform a fusing process at four fusing points without cutting the coil.

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

According to an embodiment of the present invention, A rotor in which the rotating shaft is disposed; A stator disposed outside the rotor; And a housing for accommodating the rotor and the stator, wherein the stator comprises: a stator core; And a plurality of coils wound around the stator core; And a terminal, wherein the coil is disposed in parallel between a power supply terminal and a neutral point, the terminal disposed at the power supply terminal and the neutral point includes a hook portion, and the hook portion is provided with a motor Lt; / RTI >

Preferably, the first terminal disposed at the power supply end of the terminal comprises: a main body; A pin portion projecting from the main body; And the hook portion disposed on one side of the main body.

One of the coils for implementing the U-phase, the W-phase, and the V-phase may be disposed on the hook portion.

The second terminal disposed at the neutral point of the terminal further includes: a main body; And the hook portion disposed on one side of the main body.

The hooks may be provided with coils embodying U-phase, W-phase, and V-phase.

A third terminal of the terminal disposed at the neutral point may include a first frame and a second frame; And three hooks disposed on one side of the first frame, and the first frame may have a predetermined curvature based on a virtual point.

One of the coils implementing the U-phase, the W-phase, and the V-phase may be disposed in each of the hook portions.

Meanwhile, the hook portion may be formed with a predetermined width (W).

Further, one side of the body may be disposed on the insulator of the stator.

The motor according to the embodiment having the above-described configuration can minimize the fusing point by using the hook-shaped terminal pin.

In addition, the fusing process can be performed at four fusing points without cutting the coil using four hooked terminal pins.

In addition, since the coil diameter of the coil can be reduced by using the parallel circuit, the amount of winding can be improved.

That is, the motor can be compactly designed while minimizing the fusing point by using coils and terminals arranged in parallel between the power supply stage and the neutral point.

1 is an exploded perspective view showing a motor according to an embodiment,
2 is a view showing the arrangement of the housing and the stator of the motor according to the embodiment,
3 is a view showing a wiring method of a motor according to an embodiment,
4 is a diagram showing a first terminal disposed at a power supply end,
5 is a diagram showing a second terminal arranged at a neutral point,
6 is a diagram showing a third terminal arranged at a neutral point,
7 is a view showing a wiring method of the motor according to the embodiment of the third terminal.

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.

FIG. 1 is an exploded perspective view showing a motor according to an embodiment, and FIG. 2 is a view showing the arrangement of a housing and a stator of a motor according to an embodiment.

1 and 2, the motor 1 according to the embodiment includes a housing 100, a cover 200, a stator 300, a rotor 400, a rotating shaft 500, and a sensing unit 600 . A bearing 10 may be disposed on the outer circumferential surface of the rotary shaft 500. Here, the bearing 10 is rotatable with respect to the rotary shaft 500, and may be disposed on the upper and lower portions of the rotary shaft 500, respectively.

The housing 100 together with the cover 200 can form the outer shape of the motor 1 and determine the size of the motor 1. [ As the housing 100 and the cover 200 are coupled to each other, a receiving space may be formed between the housing 100 and the cover 200.

1, a stator 300, a rotor 400, a rotating shaft 500, and the like may be disposed in the receiving space.

The housing 100 is formed in a cylindrical shape and a space in which the stator 300 and the rotor 400 can be disposed may be formed therein. At this time, the shape and material of the housing 100 may be variously modified, but a metal material that can withstand high temperatures can be selected.

The cover 200 may be disposed on the upper portion of the housing 100. At this time, the cover 200 may be disposed on the upper portion of the housing 100 and then fixed by an adhesive member or a fixing member.

The stator 300 may be disposed inside the housing 100. At this time, the stator 300 may be disposed inside the housing 100 using a hot pressing method.

Referring to FIG. 2, the stator 300 may include a stator core 310, a coil 320 wound around the stator core 310, and a terminal 330. The stator 300 may further include an insulator (not shown) disposed between the stator core 310 and the coil 320. The insulator insulates the stator core 310 and the coil 320 from each other.

The stator core 310 can be formed by laminating plate-shaped plates at a predetermined height.

The stator core 310 may include a yoke 311 formed in a cylindrical shape and twelve teeth 312 formed radially projecting toward the center C of the rotary shaft 500 from the inner circumferential surface of the yoke 311. Here, the plurality of teeth 312 may be disposed at predetermined intervals along the circumferential direction of the yoke 311.

The coil 320 may be wound on each of the teeth 312. At this time, the insulator can insulate the coil 320 wound around the tooth 312 and the tooth 312.

FIG. 3 is a view showing a wiring system of a motor according to the embodiment. FIG. 3 (a) is a view showing a coil wound around a stator core, and FIG. 3 (b) is a view showing a coil wiring system.

3, the coil 320 of the motor 1 may be wound in a Y-connection type on the tooth 312, such that at least three coils 320 are wound separately on the tooth 312, . Accordingly, at least three coils 320 may implement U-phase, V-phase, and W-phase.

Each of the coils 320 may be disposed in parallel between a power supply terminal (U, V, W) and a neutral point (N). Accordingly, the diameter of the coil 320 can be reduced. Therefore, the winding operation of the coil 320 is facilitated and the winding operation can be performed even with a winding machine of a lower capacity.

A terminal 330 may be disposed at the power supply terminals (U, V, W) and the neutral point (N).

At this time, one region of the coil 320 may be disposed on the hook 331 of the terminal 330. At this time, the hook portion 331 may be formed in a shape of a hook, and one region of the coil 320 may be disposed over the hook portion 331. The coil 320 and the terminal 330 may be electrically connected to each other by performing a fusing process on the hook 331.

Accordingly, since the motor 1 uses the terminal 330 including the hook portion 331 on which the coil 320 is disposed, the degree of freedom of arrangement of the terminal 330 increases, The size can be reduced and the cost of parts can be reduced.

Referring to FIG. 3, the motor 1 may include four terminals 330. That is, since the motor 1 uses the four terminals 330 formed with the hooks 331, the motor 1 has four fusing points. Accordingly, the fusing point can be reduced as compared with the motor including the delta wiring structure. Here, the motor implementing the delta wiring structure has six fusing points.

Fig. 4 is a diagram showing a first terminal disposed at a power supply end, wherein Fig. 4 (a) is a perspective view showing the first terminal and Fig. 4 (b) is a side view showing the first terminal.

4, the first terminal 330a disposed at the power supply terminals U, V, and W of the terminal 330 may include a hook portion 331, a main body 332, and a fin portion 333. [ have.

One of the coils 320 that implement the U-phase, the W-phase, and the V-phase may be disposed on the hook 331 of the first terminal 330a.

The hook portion 331 may protrude from one side of the main body 332. 4 (b), the hook portion 331 may be formed into a hook shape. At this time, the hook portion 331 may be formed with a predetermined width W as shown in Fig. 4 (a). This can increase the contact area with one region of the coil 320 across the seating surface 331a of the hook portion 331, thereby reducing the risk of fusing failure during the fusing process.

One side of the body 332 may be disposed on the insulator. In detail, one side of the main body 332 can be coupled to a groove (not shown) formed in the insulator. Accordingly, the first terminal 330a is fixed to the insulator.

The fin 333 may be disposed to protrude from one side of the main body 332. In detail, the fin portion 333 can be disposed so as to protrude in the axial direction. Here, the axial direction means the longitudinal direction of the rotary shaft 500.

On the other hand, a driving current can be applied to the fin portion 333. Accordingly, a driving current can be applied to the coil 320 through the first terminal 330a.

Fig. 5 is a diagram showing a second terminal disposed at a neutral point. Fig. 5 (a) is a perspective view showing a second terminal and Fig. 5 (b) is a side view showing a second terminal.

5, the second terminal 330b disposed at the neutral point N of the terminal 330 may include a hook portion 331 and a body 332. [ In the description of the second terminal 330b, the same components as those of the first terminal 330a are denoted by the same reference numerals, and a detailed description thereof will be omitted.

Compared to the first terminal 330a, the hooks 331 of the second terminal 330b may be provided with coils 320 that implement U-phase, W-phase, and V-phase.

Since the fusing process is performed on the hook 331 of the second terminal 330b, the three coils 320 can be electrically connected to the second terminal 330b. Accordingly, the second terminal 330b can implement the neutral point N, as shown in Fig.

Also, the second terminal 330b differs from the first terminal 330a in that the pin portion 333 is deleted.

Fig. 6 is a diagram showing an embodiment of a third terminal, wherein Fig. 6 (a) is a perspective view showing a third terminal, and Fig. 6 (b) is a plan view showing a third terminal.

The third terminal 330c disposed at the neutral point N of the terminal 330 can realize the neutral point N of the motor 1. [ Accordingly, the motor 1 can implement the neutral point N by disposing the third terminal 330c instead of the second terminal 330b.

Referring to FIG. 6, the third terminal 330c may include three hooks 331 and a main body 334.

The body 334 may include a first frame 335 and a second frame 336.

The first frame 335 may be formed in an arc shape having a predetermined thickness T. [ In addition, three hooks 331 may be spaced apart from the side surface 335a of the first frame 335. For example, the first frame 335 may be formed to have a predetermined curvature (1 / R) based on the virtual point P. In detail, the side surface 335a of the first frame 335 can be formed to have a predetermined curvature (1 / R) based on the virtual point P. Here, the virtual point P may be the center C.

The second frame 336 may be formed to protrude from one side of the first frame 335. One side of the second frame 336 may be disposed on the insulator. In detail, one side of the second frame 336 can be coupled to a groove (not shown) formed in the insulator. Accordingly, the third terminal 330c is fixed to the insulator.

Each of the hooks 331 of the third terminal 330c may be provided with a coil 320 that implements a U-phase, a W-phase, and a V-phase.

Since the fusing process is performed in each of the hook portions 331 of the third terminal 330c, each of the coils 320 implementing the U, W, and V phases is electrically connected to the third terminal 330c .

The hook portion 331 may protrude from one side of the main body 332. 6 (a), the hook portion 331 may be formed into a hook shape.

The three hook portions 331 may be spaced apart by a predetermined distance D as shown in Fig. 6 (b). Accordingly, mutual interference between the coils 330 disposed in the hook portions 331 of the third terminal 330c is prevented.

Thus, the third terminal 330c may implement the neutral point N of the coil 320, as shown in FIG.

The rotor 400 may be disposed inside the stator 300 and may be disposed on the outer circumferential surface of the rotating shaft 500. Here, the rotor 400 may be rotatably disposed on the stator 300.

The rotor 400 may be formed by stacking a plurality of disc-shaped core plates. A plurality of magnets mounted on the rotor 400 are disposed to face the stator 300 and each magnet is formed into an IPM type inserted and coupled to the rotor 400 through a hole formed in the rotor 400 . For example, the rotor 400 may have ten magnets disposed in the rotor core.

The rotor 400 may be of a type in which a magnet is disposed on the outer circumferential surface of the rotor core.

Accordingly, the rotor 400 rotates due to electrical interaction between the coil 320 and the magnet. As the rotor 400 rotates, the rotary shaft 500 rotates to generate a driving force.

The rotary shaft 500 may be arranged to pass through the center of the rotor 400. When the driving current is applied to the stator 300, the rotor 400 is rotated by the electromagnetic interaction between the stator 300 and the rotor 400, so that the rotating shaft 500 is interlocked with the rotation of the rotor 400 .

The sensing unit 600 senses the magnetic force of the sensing magnet installed in a rotatable manner with respect to the rotor 400 to sense the current position of the rotor 400 and sense the rotation of the rotation axis 500. [

The sensing unit 600 may include a plate 610 on which the sensing magnet 611 is disposed and a printed circuit board 620 on which the sensor 621 is disposed.

The plate 610 is disposed above the printed circuit board 620 at a predetermined distance. The plate 610 may be coupled to the rotary shaft 500 to rotate together with the rotary shaft 500. At this time, the sensing magnet 611 may be disposed on the lower surface of the plate 610.

A sensor 621 may be disposed on the upper surface of the printed circuit board 620. The sensor 621 senses the polarity or magnetic flux of the sensing magnet 611 and outputs a sensing signal used to calculate the rotation angle of the rotor 400. At this time, a Hall IC (Hall IC) and an encoder IC (Encoder IC) can be used as the sensor 621.

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
100: housing 200: cover
300:
310: stator core 320: coil
330: Terminal 330a: Terminal 1
330b: second terminal 330c: third terminal
331:
332: main body 333:
335: first frame 336: second frame
400: Rotor
500:
600: sensing part

Claims (9)

A rotating shaft;
A rotor in which the rotating shaft is disposed;
A stator disposed outside the rotor; And
And a housing disposed outside the stator,
The stator includes:
Stator core; And
A plurality of coils wound around the stator core; And
Terminal,
Wherein the coils are arranged in parallel between a power supply stage and a neutral point,
Wherein the terminal disposed at the power supply terminal and the neutral point includes a hook portion,
And one region of the coil is disposed in the hook portion. The method according to claim 1,
A first terminal disposed at the power supply end of the terminal,
main body;
A pin portion projecting from the main body; And
And the hook portion disposed on one side of the main body. 3. The method of claim 2,
Wherein one of the coils embodying the U-phase, the W-phase and the V-phase is disposed in the hook portion. The method according to claim 1,
A second terminal disposed at the neutral point of the terminal,
main body; And
And the hook portion disposed on one side of the main body. 5. The method of claim 4,
And a coil for implementing a U-phase, a W-phase, and a V-phase is disposed in the hook portion. The method according to claim 1,
A third terminal disposed at the neutral point of the terminal,
A body including a first frame and a second frame; And
And three hooks disposed on one side of the first frame,
Wherein the first frame has a predetermined curvature with respect to a virtual point. The method according to claim 6,
Wherein one of the coils embodying the U-phase, the W-phase and the V-phase is disposed in each of the hook portions. The method according to any one of claims 2, 4, and 6,
And the hook portion is formed with a predetermined width (W). The method according to any one of claims 2, 4, and 6,
And one side of the main body is disposed in an insulator of the stator.

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