KR102734603B1 - Fixation apparatus for iron core of rotating machine - Google Patents

Abstract

The present invention relates to a core fixing device for a rotating machine.
According to one embodiment of the present invention, a core fixing device of a rotary machine includes: a plurality of first support members that are in close contact with an outer periphery of a core laminate formed by stacking a plurality of cores; and at least one second support member that is in close contact with the outer periphery of the plurality of first support members and connects the plurality of first support members; wherein the second support member can be in non-contact with the outer periphery of the cores.

Description

{FIXATION APPARATUS FOR IRON CORE OF ROTATING MACHINE}

The present invention relates to a core fixing device for a rotating machine.

A rotating machine is a machine that rotates, and may include an electric motor that changes electrical energy into rotational energy and a generator that changes rotational energy into electrical energy.

The rotor and stator of a rotating machine each have an iron core, and windings can be wound on the iron core.

When preparing multiple such cores and stacking multiple cores, it is necessary to firmly support the cores so that they do not become deformed. In addition, it is necessary to consider a method to minimize or prevent eddy current loss due to leakage flux during the process of fixing and supporting the cores.

KR 10-1002958 B1 (2010.12.15)

The purpose of the present invention is to firmly fix an iron core and minimize or prevent deformation of the iron core.

In addition, the present invention aims to minimize or prevent eddy current loss due to leakage flux.

According to one embodiment of the present invention, a core fixing device of a rotating machine includes: a core laminate formed by stacking a plurality of cores, a plurality of first support members that are in close contact with the outer periphery of each core; and at least one second support member that is in close contact with the outer periphery of the plurality of first support members and connects the plurality of first support members, wherein the plurality of first support members are provided in a one-to-one correspondence with the cores, so that one first support member is coupled to the outer periphery of one of the cores, and one or each of the second support members may include a bent extension portion formed by contacting a pair of the first support members that are mutually adjacent to each other along the stacking direction of the cores and extending both ends thereof in the direction of the first support members by bending.

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Additionally, in one embodiment, the outer periphery of the first support member and the outer periphery of the core may be on the same line in the radial cross-section of the core.

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Additionally, in one embodiment, the first support member and the second support member may be discontinuously present in the stacking direction of the iron core.

Additionally, in one embodiment, the first support member may be made of a material including SS400.

Additionally, in one embodiment, the second support member may be made of a material including SUS.

According to the present invention, it is possible to firmly support an iron core and minimize or prevent deformation of the iron core.

In addition, according to the present invention, eddy current loss due to leakage flux can be minimized or prevented.

Figure 1 is a perspective view of a lamination of stator cores.
Figure 2 illustrates the eddy current distribution of the laminated body of the stator core of Figure 1.
FIG. 3 is a perspective view of a laminate of stator cores according to one embodiment of the present invention.
Figure 4 is a ZY plane cross-sectional view of area A of Figure 3.
FIG. 5 illustrates the eddy current distribution of a laminated body of a stator core according to one embodiment of the present invention.

To help understand the description of embodiments of the present invention, elements described with the same reference numerals in the attached drawings are the same elements, and related elements among the components that perform the same function in each embodiment are indicated with the same or extended numbers.

In addition, in order to clarify the gist of the present invention, descriptions of elements and techniques well known in the art will be omitted, and the present invention will be described in detail below with reference to the attached drawings.

However, the idea of the present invention is not limited to the presented embodiments, and those skilled in the art may propose other forms in which specific components are added, changed, or deleted, but it is to be understood that this is also included within the scope of the same idea as the present invention.

The X-axis and Z-axis shown in the attached drawings below are the radial directions of the rotating shaft and the stator core, and the Y-axis is the longitudinal direction of the shaft.

Figure 1 is a perspective view of a laminate of stator cores (10).

As shown in Fig. 1, a laminate of stator cores (10) can be formed by laminating a plurality of stator cores (10) and combining a plurality of support members (20) to the outer periphery of the stator cores (10). However, this is not necessarily limited to the stator core (10), and if necessary, a rotor core (not shown) can be laminated and a support member (20) can be combined to form a laminate of rotor cores (not shown).

A plurality of support members (20) can be arranged at a certain distance from each other in the circumferential direction of the stator core (10).

The support member (20) may have a certain length in the stacking direction of the stator core (10), and the length may be at least equal to the stacking height of the stator core (10).

The support member (20) can be welded to the outer surface of the stator core (10) and can restrain the stator core (10) in the diameter direction and height direction of the stator core (10).

The above-mentioned support member (20) may be provided with a material including stainless steel. Also, in one embodiment, the above-mentioned support member (20) may be provided with a material including SS400. However, when the support member (20) is provided with a material including SS400, it can be seen that an excessive eddy current loss occurs along the entire length direction of the support member (20), as shown in FIG. 2.

This is caused by the conductivity characteristics of SS400. When the support member (20) is made of a material including SS400, the leakage flux generated in the stator core (10) passes through the support member (20) due to the conductivity characteristics of SS400, causing excessive eddy current loss.

FIG. 3 is a perspective view of a laminate (110) of a stator core (111) according to one embodiment of the present invention.

A rotor structure (102) may be connected to the outer periphery of a rotating shaft (101), and a laminate (110) of stator cores (111) may be present outside the outer periphery of the rotor structure (102). A stator winding (103) may be wound around the stator core (111).

In one embodiment of the present invention, a first support member (120) may be attached to the outer periphery of the laminate. The first support member (120) may be welded to the outer surface of the stator core (111).

The first support member (120) may be provided in multiple numbers, and the number may be the same as the number of stator cores (111).

The first support member (120) is provided in a one-to-one correspondence with the stator core (111), so that one first support member (120) can be welded to the outer circumference of one stator core (111). Accordingly, the stator core (111) can be restrained in the X-axis, Y-axis, and Z-axis directions, and the stator core (111) laminate (110) can be firmly fixed. Accordingly, torsional deformation of the stator core (111) can be minimized or prevented.

The height of the first support member (120) in the Y-axis direction may be at least equal to the height of one stator core (111) in the Y-axis direction.

The plurality of first support members (120) may exist on the same line in at least some areas in the Y-axis direction. The plurality of first support members (120) may exist discontinuously in the Y-axis direction. The plurality of first support members (120) may be spaced apart from each other by a certain distance in the Y-axis direction. Accordingly, the path of the eddy current of the stator core (111) can be cut off. Therefore, the eddy current loss due to leakage flux can be minimized or prevented.

A plurality of second support members (130) may be tightly coupled to the outer periphery of a plurality of first support members (120). In one embodiment of the present invention, the second support members (130) may be welded to the first support members (120) or coupled to the first support members (120) by means of a coupling member such as a bolt (not shown).

When connecting the first support member (120) and the second support member (130) using bolts (not shown), through holes (not shown) are provided in the first support member (120) and the second support member (130), and the bolts (not shown) are inserted into the through holes, and the connection is completed by finishing with nuts (not shown) or the like. However, this is not necessarily limited to the present invention, and can be appropriately modified and applied by those skilled in the art.

A plurality of second support members (130) are provided discontinuously in the Y-axis direction, and one second support member (130) can connect a pair of first support members (120) that are adjacent to each other in the Y-axis direction. One second support member (130) can serve to restrain a pair of first support members (120) in the X-axis, Y-axis, and Z-axis directions.

In one embodiment of the present invention, the second support member (130) may be in non-contact with the outer periphery of the stator core (111). Accordingly, the first support members (120) that are provided discontinuously in the Y-axis direction can be firmly connected to each other, and the first support members (120) can be used to more firmly fix the laminated body of the stator core (111).

In one embodiment of the present invention, a plurality of second support members (130) may be provided discontinuously in the Y-axis direction. This may contribute to effectively blocking the eddy current path and minimizing or preventing eddy current loss.

In one embodiment of the present invention, the first support member (120) and the second support member (130) may be made of a material including stainless steel.

In addition, in one embodiment of the present invention, the first support member (120) may be provided with a material including SS400, and the second support member (130) may be provided with a material including SUS. Accordingly, the structural rigidity of the first support member (120) and the second support member (130) can be secured to the maximum extent, while the first support member (120) and the second support member (130) can have relatively low relative permeability. This can contribute to minimizing or preventing eddy current loss.

Figure 4 is a cross-sectional view of the Z-Y plane of area A of Figure 3.

As shown in Fig. 4, the stator core (111) may include a first stator core (111a), a second stator core (111b) laminated on the first stator core (111a), and a third stator core (111c) laminated on the second stator core (111b). The stator cores (111) may be continuously laminated in the Y-axis direction using this principle.

A first support member (120a) may be welded to the outer surface of the first stator core (111a), another first support member (120b) may be welded to the outer surface of the second stator core (111b), and another first support member (120c) may be welded to the outer surface of the third stator core (111c).

The outer circumference of the first stator core (111a) and the outer circumference of one first support member (120a) welded to the outer surface of the first stator core (111a) may exist on the same line in the Z-axis direction. In addition, the outer circumference of the second stator core (111b) and the outer circumference of another first support member (120b) welded to the outer surface of the second stator core (111b) may also exist on the same line in the Z-axis direction, and this may be applied to the third stator core (111c) and the first support member (120c) welded to the outer surface of the third stator core (111c) according to the same principle.

And a pair of first support members (120a, 120b) adjacent to each other in the Y-axis direction can be mutually connected and fixed by one second support member (130). Accordingly, the contact area between the stator core (111) and the first support member (120) can be maximized while effectively cutting off the eddy current path. Accordingly, the stator core (111) can be firmly supported while minimizing or preventing eddy current loss.

In one embodiment of the present invention, the second support member (130) may include a plurality of bent extension parts (131) formed by bending and extending both ends thereof.

One second support member (130) includes a pair of bending extensions (131), and one bending extension (131) of one second support member (130) can be coupled to an outer surface of one first support member (120a), and another bending extension (131) of one second support member (130) can be coupled to an outer surface of another first support member (120b) adjacent to the first support member (120a).

According to this, a separation space (S) can be formed between a pair of bending extensions (131) and between a pair of adjacent first support members (120a, 120b). This separation space (S) can be formed in multiple numbers in the Y-axis direction and can serve to cut off an eddy current path. Accordingly, eddy current loss due to leakage flux of the stator core can be minimized or prevented.

FIG. 5 illustrates the eddy current distribution of a laminate (110) of a stator core (111) according to one embodiment of the present invention.

As shown in Fig. 5, it can be seen that the eddy current path is interrupted in the lamination direction of the stator core (111) by the first support member (120) and the second support member (130), and thus the eddy current path is formed discontinuously. In addition, it can be seen that the eddy current loss is reduced by about 10% compared to the eddy current distribution shown in Fig. 2.

In this way, by fixing and supporting the laminate (110) of the stator core (111) by the first support member (120) and the second support member (130), not only can the laminate (110) be firmly fixed, but also eddy current loss caused by the material characteristics of the first support member (120) and the second support member (130) can be minimized or prevented.

The matters described above have been described with respect to one embodiment of the present invention, and the scope of the rights of the present invention is not limited thereto, and it will be apparent to a person having ordinary skill in the art that various modifications and variations are possible within a scope that does not depart from the technical idea of the present invention described in the claims.

101: Shaft 102: Rotor structure
103: Stator winding 110: Laminate
111: Stator core 120: First support member
130: Second support member 131: Folding extension
S: Separation space

Claims (7)

In a core laminate formed by stacking a plurality of cores, a plurality of first support members that are in close contact with the outer periphery of each core; and
At least one second support member that is in close contact with the outer periphery of the plurality of first support members and connects the plurality of first support members.
Including,
A plurality of the first support members are provided in a one-to-one correspondence with the iron core, and one of the first support members is connected to the outer periphery of one of the iron cores.
A core fixing device of a rotating machine, wherein one or each of the second support members contacts a pair of the first support members adjacent to each other along the stacking direction of the core, and includes a bent extension formed by bending both ends thereof and extending in the direction of the first support members.
delete In the first paragraph,
A core fixing device of a rotating machine, wherein the outer circumference of the first support member and the outer circumference of the core are on the same line in the radial cross-section of the core.
delete In clause 1 or 3,
The first support member and the second support member are a core fixing device of a rotating machine, which are discontinuously present in the stacking direction of the core.
In clause 1 or 3,
The above first support member is a core fixing device of a rotating machine made of a material including SS400.
In clause 1 or 3,
The above second support member is a core fixing device of a rotating machine made of a material including SUS.

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