KR20160033976A - Stator with winding structure for space factor enhancement, Motor having the same, and Method for winding coils to the same - Google Patents

Abstract

The present invention relates to a stator and, more specifically, to a stator with a winding structure for space factor enhancement, a motor having the same, and a coil winding method. The stator with a winding structure for space factor enhancement increases a space factor representing the volume wound by a coil to reduce a resistance value of the winding, thereby reducing a copper loss. The stator includes: a winding space unit in which at least two coils having different diameters can be wound; and multiple fixtures having a winding withdrawal space unit withdrawing the coils.

Description

[0001] The present invention relates to a stator, a motor using the same, and a winding method for winding a coil,

The present invention relates to a stator, and more particularly, to a stator having a winding structure for increasing a drop rate by reducing a resistance value of a winding by reducing a resistance value of the winding by increasing a drop rate at which the coil can be wound, a motor and a coil winding method using the same It is about.

Generally, a motor is a device that obtains rotational power by converting electrical energy into mechanical energy. It is widely used not only for home electronic products, industrial devices, but also for environmental vehicles.

The driving motor of the environment vehicle must reduce the weight of the motor and electric power train by increasing the power density. This requirement tends to reduce the torque and design the speed region to be large.

The driving motor includes a stator mounted on a motor housing or a frame, a magnet rotor inserted into the stator so as to be rotatable, and a shaft inserted and fixed to the center of the rotor. At this time, the stator is a type in which a coil is wound around the stator core.

Among these driving motors, a distributed type motor and a concentrated winding type motor are used in vehicles. A diagram illustrating the concept of a dual concentric motor concept is shown in FIG.

Referring to FIG. 1, a coil 120 is wound in a space 140 in which a coil of the stator 150 can be wound. Of course, a space 130 for drawing out the winding 120 and an insulation distance securing space 110 are formed.

Generally, in the case of the concentrator motor, since it is disposed in the stationary magnetic body 150 with one type of coil as shown in FIG. 1, the number of turns (turn number) can be adjusted, but there is a disadvantage that a lot of empty space is generated.

Further, as the empty space is generated, the entire space can not be utilized and resistance is increased, which is an obstacle to improve the motor efficiency.

1. Korean Patent Publication No. 10-2014-0087365 2. Korean Patent Publication No. 10-2013-0013104

It is an object of the present invention to provide a stator having a winding structure for increasing a drop rate at which a coil can be wound, a motor using the same, and a coil winding method.

It is another object of the present invention to provide a stator having a winding structure that reduces a resistance value of a winding by decreasing a resistance value of a winding to reduce a copper loss, a motor and a coil winding method using the same.

According to an aspect of the present invention, there is provided a stator having a winding structure for increasing a drop rate at which a coil can be wound.

The stator may be characterized in that a plurality of stator teeth having a winding space portion capable of winding at least two coils having different diameters and a winding lead-out space portion for drawing the at least two coils are formed .

At least two or more coils may be arranged in advance in the radial direction in which the coils having a smaller thickness than the coils are arranged in the radial direction in which the coils are arranged .

Further, the at least two coils may be wound on the plurality of stator teeth at the same time.

According to another aspect of the present invention, there is provided a winding machine comprising: a winding space portion around which a first coil and a second coil having different diameters can be wound; and a plurality of winding-out space portions for drawing out the first coil and the second coil Wherein the first coil is disposed in the winding space portion first and the second coil is disposed in the remaining space after the first coil is disposed .

In this case, the thickness of the second coil is smaller than the thickness of the first coil, and the number of turns of the second coil and the number of turns of the first coil are equal to each other.

Further, the ends of the first coil and the second coil may be connected in parallel.

On the other hand, another aspect of the present invention is a stator as set forth above; And a rotor inserted and assembled inside the stator.

On the other hand, another aspect of the present invention provides a method of manufacturing a coil, comprising: a coil preparing step of preparing a first coil and a second coil having different diameters; A stator preparing step of preparing a stator having a plurality of stator teeth having a winding space portion around which the first coil and the second coil can be wound and a winding lead-out space portion for drawing out the first coil and the second coil; And a coil disposing step of disposing the first coil and the second coil in the plurality of stator teeth.

At this time, the coil arranging step may include winding the first coil and the second coil simultaneously on the plurality of stationary magnetic bodies.

Further, the coil disposing step may include: disposing the first coil in the winding space portion first; And disposing the second coil in a remaining space after the first coil is disposed.

The coil winding method may further include connecting the ends of the first coil and the second coil in parallel.

According to the present invention, since the coil is wound with a coil having two or more different diameters in a space in which the coil can be wound, the drop rate is increased.

In addition, as another effect of the present invention, the motor resistance is reduced as the dot rate increases, and such a reduction in resistance reduces the copper loss upon driving the motor.

Another advantage of the present invention is that the motor efficiency is increased by reducing the loss of copper loss, the heat loss is reduced as the copper loss is reduced, and the heat of the motor is reduced, which is advantageous for cooling.

1 is a conceptual view of a stator showing a general winding method.
FIG. 2 is a conceptual view of a stator having a winding structure for increasing a drop rate according to an embodiment of the present invention.
3 is a conceptual view of a stator having a winding structure for increasing a drop rate according to another embodiment of the present invention.
4 is a flowchart illustrating a process of disposing a coil in a stator according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the 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 first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

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 Should not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a stator having a winding structure for increasing a drop rate according to an embodiment of the present invention, a motor using the same, and a coil winding method will be described in detail with reference to the accompanying drawings.

FIG. 2 is a conceptual view of a stator having a winding structure for increasing a drop rate according to an embodiment of the present invention. 2, the stator 200 includes a winding space 240 through which a first coil 220 and a second coil 221 having different diameters can be wound, a first coil 220 and a second coil 220, A plurality of stator teeth 250 having a winding lead-out space portion 230 for drawing out the second coil 221 are formed.

The winding space portion 240 includes a first winding space portion 240-1 and a second winding space portion 240-2. A first coil housing 260-1 in which the first coil 220 is accommodated is provided in the first winding space 240-1 and a second coil housing 260-1 is provided in the second winding space 240-2. 221 is accommodated in the first coil housing 260-1.

The first and second coil housings 260-1 and 260-2 function to prevent the electrical connection between the stationary magnetic element 250 and the second coil 221 of the first coil 220. [ Therefore, an insulating material is used as the material of the first and second coil housings 260-1 and 260-2.

An insulation distance securing space 210 is provided between the first coil housing 260-1 and the second coil housing 260-2 in order to secure an insulation distance between the coils disposed between the first coil housing 260-1 and the second coil housing 260-2.

At this time, the thickness of the second coil 221 is smaller than the thickness of the first coil 220. In addition, the second coil 221 is disposed in a radial gap where the first coil 220 is disposed.

Of course, the first coil 220 and the second coil 221 are simultaneously wound on the stator tooth 250.

3 is a conceptual view of a stator having a winding structure for increasing a drop rate according to another embodiment of the present invention. 3, the stator 200 includes a winding space 240 through which the first coil 220 and the second coil 221 having different diameters can be wound, and the first coil 220 and the second coil 220, A plurality of stator teeth 250 having a winding lead-out space portion 230 for drawing out the second coil 221 are formed.

In this case, the first coil 220, which is larger than the diameter of the second coil 221, is first disposed in the winding space 240. Then, the first coil 220 is disposed in the first and second remaining spaces 310-1 and 310-2 of the winding space portion 240 after the first coil 220 is disposed.

The first remaining space 310-1 becomes the right outside portion of the first winding space 240-1 as viewed in FIG.

The second remaining space 310-2 becomes the left outer portion of the second winding space 240-2 as viewed in FIG.

The thickness of the second coil 221 is smaller than the thickness of the first coil 220 and is disposed in the winding space 240 a number of times equal to the number of times the first coil 220 is wound.

Of course, the number of turns of the second coil 221 and the number of turns of the first coil 220 are the same.

When the second coils 221 are arranged, the ends of the first coil 220 and the second coil 221 are connected in parallel.

Generally, a motor (especially a drive motor) has a loss such as an iron loss, a mechanical hand, and a copper loss. The copper loss is the heat loss caused by the winding resistance caused by the current flowing through the windings during motor operation. To reduce this, the resistance of the windings must be reduced. In addition, if the copper loss is reduced, the efficiency of the motor is improved.

The winding resistance is proportional to the length of the coil and inversely proportional to its width. The length of the coil is determined by the number of turns (number of turns). The number of turns can not be changed by the value determined by the performance of the motor. Therefore, in one embodiment of the present invention, the drop rate (ratio of the area occupied by the coil in the width of the stator slot) is increased to lower the resistance value.

Particularly, the space for winding the coil is determined by the space for securing the insulation distance and the space for the winding-out portion. 2 and 3 of the present invention, the coils are arranged so as to maximize the drop rate while adjusting the number of turns (the number of turns) selected at the time of designing. That is, all of the coil winding space is utilized to reduce the resistance.

4 is a flowchart illustrating a process of disposing a coil in a stator according to another embodiment of the present invention. Referring to FIG. 4, a first coil 220 and / or a second coil 221 having different diameters are prepared (step S410).

A winding space portion 240 around which the first coil 220 and / or the second coil 221 can be wound and a winding lead-out space portion for pulling out the first coil 220 and the second coil 221 The stator 200 having the stator teeth 250 is prepared (step S420).

Then, the first coil 220 and / or the second coil 221 are disposed in the stationary magnetic member 250 (step S430).

Of course, the order of steps S410 and S420 may be changed.

In addition, the coil disposing step (S430) may include sequentially disposing the first coil in the winding space portion sequentially; And disposing the second coil in a remaining space after the first coil is disposed.

In addition, after step S430, the step of connecting the ends of the first coil and the second coil in parallel may be further included.

200: stator
210: Insulation clearance space
220: first coil
221: second coil
230: winding take-out space part
240: winding space part
260-1: first coil housing
260-2: second coil housing

Claims (12)

Wherein a plurality of stator teeth having a winding space portion capable of winding at least two coils having different diameters and a winding lead-out space portion for drawing out at least two coils are formed.
The method according to claim 1,
Wherein at least two or more coils are arranged in a radial direction in which coils having a thickness smaller than that of the coils are arranged in the radial direction in which the coils are arranged. Stator Increase Rate Stator.
The method according to claim 1,
Wherein the at least two coils are simultaneously wound on the plurality of stator teeth.
A plurality of stator teeth having a winding space portion around which a first coil and a second coil having different diameters can be wound and a winding lead-out space portion for drawing out the first coil and the second coil,
Wherein the first coil is first disposed in the winding space portion and the second coil is disposed in a remaining space after the first coil is disposed.
5. The method of claim 4,
Wherein the thickness of the second coil is smaller than the thickness of the first coil and the number of turns of the second coil and the number of turns of the first coil are the same.
5. The method of claim 4,
And the ends of the first coil and the second coil are connected in parallel.
A stator according to any one of claims 1 to 6, And
And a rotor inserted and assembled inside the stator.
A coil preparing step of preparing a first coil and a second coil having different diameters;
A stator preparing step of preparing a stator having a plurality of stator teeth having a winding space portion around which the first coil and the second coil can be wound and a winding lead-out space portion for drawing out the first coil and the second coil; And
And arranging the first coil and the second coil in the plurality of stator teeth.
9. The method of claim 8,
Wherein the coil placement step comprises:
And winding the first coil and the second coil simultaneously on the plurality of stationary magnetic poles.
9. The method of claim 8,
Wherein the coil placement step comprises:
Disposing the first coil in the winding space portion first; And
And disposing the second coil in a remaining space after the first coil is disposed.
11. The method of claim 10,
And connecting the ends of the first coil and the second coil in parallel.
9. The method of claim 8,
Wherein the thickness of the second coil is smaller than the thickness of the first coil.

Images