KR20170049646A

KR20170049646A - A Stator

Info

Publication number: KR20170049646A
Application number: KR1020150149058A
Authority: KR
Inventors: 김한집
Original assignee: 주식회사 강림정공
Priority date: 2015-10-27
Filing date: 2015-10-27
Publication date: 2017-05-11

Abstract

The present invention provides a stator capable of maximizing generation efficiency while minimizing cogging torque during the operation of a power generator. The stator (1) is manufactured as the number (a) of magnets (13) and the number (b) of slots (14) are defined as an even number, which is b-1, and a multiple of 3, which is no less than 6, respectively, and then a and b are multiplied by the same number in accordance with a generation capacity of a generator. The width (w) of a protruding part (16) is no less than the width (u) of a body part (17) but is minimized. An end part (v) of the protruding part (16) is formed into an inclined and circular arc shape, neighboring magnets (13) has a circular arc shape of which the circumference is divided into equal parts, and a gap (x) between the neighboring magnets (13) is minimized, and thus, the present invention is capable of significantly reducing cogging torque and maximizing generation efficiency.

Description

Stator {A Stator}

The present invention relates to a stator, and more particularly, to a stator capable of minimizing cogging torque and maximizing power generation efficiency when a generator is driven.

In a linear motor such as a generator, a cogging torque (or detent force) is a force acting in the direction of movement of the mover, and has a positive or negative value depending on the structure of the device and the position of the mover.

When the cogging torque is reduced, the normal force is also reduced, which is advantageous in terms of vibration and noise, and the starting torque is also reduced.

There are a number of ways to reduce the known cogging torque, but they have not achieved satisfactory results, and research on ways to reduce cogging torque and improve power generation efficiency while reducing the size of the equipment is a challenge for the industry .

The inventor of the present invention has developed and provided a stator capable of reducing the cogging torque with more efficient development without having been filed and registered in the patent application No. 10-1011861 for this purpose.

KR Patent No. 10-1011861 KR Patent No. 10-0601491

Accordingly, the stator provided in the present invention is to provide a stator that can significantly reduce the starting torque and the cogging torque generated when the stator used in a generator or the like is started.

It is another object of the present invention to provide a stator which is excellent in durability and can provide a higher efficiency of power generation efficiency.

The present invention relates to a stator having a stator-core laminated in a multi-stage manner in a cylindrical shape;

Wherein the number of slots formed in the stator is an odd number that is a multiple of three or more,

The number of magnets provided circumferentially on the outer edge of the stator is an even number smaller than the number of the slots;

And the number of the slots and the number of the magnets are multiplied by the same number according to the generating capacity of the generator.

In addition, the present invention is characterized in that the magnet is made in an arc-like shape, and a gap between neighboring magnets is 0.5 mm or less.

Further, the present invention is characterized in that the width of the outer projecting portion of the stator-core is not less than the width of the body portion.

Further, the present invention is characterized in that the end portion of the projecting portion is formed at an inclination angle at an end point, or in an arc shape.

The stator provided in the present invention can be used for various generators,

The stator 1 has a number a of the magnets 13 and a number b of slots 14 in the range of a to b-1 to be an even number and b to be a multiple of 3 to 6, The width w of the protrusion 16 is set to be equal to or more than the width u of the body portion 17 and the end portion v of the protrusion 16 is inclined at an inclination angle And the magnet 13 is formed in an arc shape, and the gap x between the neighboring magnets 13 is minimized, so that the cogging torque can be remarkably reduced and the power generation efficiency can be maximized Invention.

1 is a cross-sectional view showing a preferred embodiment of a generator to which the stator of the present invention is applied;
2 is a plan view showing a preferred embodiment of a generator to which the stator according to the present invention is applied
3 is a plan view of the stator according to the present invention;
FIG. 4 is a plan view showing the stator of the present invention,

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

As used herein, the terms "substantially", "substantially", and the like are used herein to refer to a value in or near the numerical value when presenting manufacturing and material tolerances inherent in the meanings mentioned, Absolute numbers are used to prevent unauthorized exploitation by unauthorized intruders of the mentioned disclosure.

The stator of the present invention is characterized in that the number of the magnets (a) and the number of slots (teeth) of the stator (b) are configured as follows to reduce the cogging torque of the generator.

That is, the number of slots (b) of the stator is an odd number that is a multiple of 3, and the number of magnets (a) is an odd number of b-1, which is one smaller than the number of slot arrangements (b).

The number of slots (b) is three-phase. The number of slots is a multiple of 3, and the coils are wound in right and left directions. The ratio of 2: 3, where a = 2 and b = 3, It is characterized by excluding it.

Further, according to the present invention, the protrusion width of the stator core is made larger than the width of the body portion, but minimized, and the end point and the end portion of the protrusion are constituted by the inclined portion or the circular arc portion. And the gap between neighboring magnets is also minimized to minimize the cogging torque and to maximize the power generation efficiency.

FIG. 1 is an overall cross-sectional view showing an entire preferred embodiment of a generator G to which the stator according to the present invention is applied, FIG. 2 is a plan view, and FIG. 3 is a plan view of the stator.

When the stator 1 is applied to the generator G as shown in Figs. 1 and 2, the upper flange 3 and the several wrench bolts 4 The stator-supporter 5a is provided with the stator-supporter 5a and the stator 1 fixed to the stator-supporter 5a is separately manufactured into a plurality of stator-cores 1a, 1b, do.

The stator-cores 1a, 1b, ... 1n are used to fix the stator-cover 5 and the stator-supporter 5a up and down radially using a wrench bolt 6 to maintain a stable fixed state .

Of course, the coils 7 are wound on the respective stator-cores 1a, 1b, ... 1n. The stator 1 of the present invention can be manufactured by using an expensive high- An end turn which is protruded at both ends when the coil 7 is wound is minimized and the size of the generator G can be minimized.

The upper cover 9 and the lower cover 10 which are rotatably mounted on the bearing 8 above and below the shaft 2 on which the stator 1 is installed are provided at the outer peripheral edge of the lower cover 10 with a housing bolt 12, and a plurality of magnets 13 are fixed to the inner edge of the housing 11.

The number of the magnets 13 and the number of the slots 14 formed by the stator 1 for reducing cogging, which is a main technical problem of the present invention, are as follows.

That is, the number (b) of slots 14 is made to be an odd number of 6 or more, which is a multiple of 3. The number (a) of the magnets 13 is an even number smaller than the number (b)

That is, a is an even number of b-1, b is a multiple of 3 over 6, and a and b are multiplied by the same number according to the generating capacity of the generator. Here, b is a multiple of 3 or more because of 2: 3 where a = 2 and b = 3 are fewer than the least common multiple and the cogging torque is large.

For example, the number of magnets and the number of slots can be varied according to these criteria as shown in Table 1 below.

division × 2 × 3 × 4 × 5 a (number of magnets) = 8
b (number of slots) = 9
when a = 16 a = 24 a = 32 a = 40 b = 18 b = 27 b = 36 b = 45 a (number of magnets) = 14
b (number of slots) = 15
when a = 28 a = 42 a = 56 a = 70 b = 30 b = 40 b = 60 b = 75

The number of the magnets 13 and the number of the slots 14 can be adjusted at a predetermined ratio according to the use of the generator G. [

The number of the magnets 13 in the stator 1 for the generator G shown in FIG. 3 is 32 and the number of the slots 14 is 36.

When the number of the magnets 13 and the number of the slots 14 is four, the number of mutually opposed magnets is four. By reducing the minimum common multiple, the cogging torque can be minimized and the power generation efficiency can be improved.

Fig. 4 is a plan view of the stator 1 of the present invention, showing the recessed portion enlarged.

In order to maximize the power generation efficiency, the individual stator-cores 1a, 1b, ... 1n are formed in the slots 14 in which the coils 7 are wound, while minimizing the width w of the outermost T- (U) of the body portion (17) for forming the body portion (17).

For example, when the width u of the body portion 17 is 16 mm, the width w of the projection portion 16 is made larger than the width u of the body portion 17 by about 23 mm.

In order to reduce the cogging torque, the end portion (v) of the protruding portion (16) may be provided with an inclination angle at an end point of the protruding portion (16) .

The magnets 13 are arranged in a circumferential pattern along the outer edge of the stator 1. The magnets 13 are each formed in an arc shape in which the circumferences are equally divided, The gap x can be maintained constant by minimizing the clearance x and the gap between the neighboring magnets 13 after assembly within a range in which the interference of the magnets 13 can be minimized, Is made to be 0.5 mm or less so that the cogeneration torque can be reduced along with the improvement of the power generation efficiency.

The stator 1 of the present invention which can be configured as described above can be used for various types of generators and the like. Particularly, the stator 1 of the present invention has the number of the slots 14 b is a multiple of b-1, b is a multiple of 3 and more than 6, multiplying a and b by the same number according to the generating capacity of the generator, and the width w of the protrusion 16 (V) of the protrusion (16) is formed at an inclination angle and an arc shape at the end point, and the neighboring magnet (13) is constituted by a circle having the circumference equally divided, The gap (x) between the magnet (13) and the magnet (13) is minimized, so that the cogging torque can be remarkably reduced and the power generation efficiency can be maximized.

Although the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Will be apparent to those of ordinary skill in the art.

1: stator 1a, 1b..1n: stator core 2: shaft 3: upper flange 4: wrench bolt 5: stator-supporter 6: wrench bolt 7: coil 8: bearing 9: upper cover 10: lower cover 11: 12: wrench bolt 13: magnet 14: slot 15: oil seal 16: protrusion 17: body part G: generator

Claims

1. A stator (1) comprising stator-cores (1a, 1b, ..., 1n) laminated in a multi-stage cylindrical shape;
The number (b) of the slots (14) formed in the stator (1) is an odd number that is a multiple of 3 or more,
The number (a) of magnets (13) circumferentially disposed on the outer edge of the stator (1) is an even number smaller than the number (b) of the slots (14) by one;
Wherein the number of slots (b) and the number of magnets (a) of the slots (14) are multiplied by the same number of a and b according to the generating capacity of the generator.

The method of claim 1, further comprising:
Wherein the magnet (13) has an arcuate shape, and a clearance (x) between the magnet (13) and the neighboring magnet (13) is 0.5 mm or less.

The method of claim 1, further comprising:
Characterized in that the width w of the outer projecting portion 16 of the stator-core 1a, 1b, ... 1n is not less than the width u of the body portion 17.

4. The method of claim 3, further comprising:
And the end portion (v) of the projecting portion (16) has an inclined angle at an end point or an arc shape.