JP2022138671A - Stationary induction electric appliance and method for manufacturing stationary induction electric appliance - Google Patents

Abstract

To provide a stationary induction electric appliance in which a magnetic shield can be easily produced and the amount of heat generated by leakage magnetic flux is small, and a method for manufacturing the stationary induction electric appliance.SOLUTION: A stationary induction electric appliance in an embodiment includes an iron core leg, a yoke, a winding, a winding support plate, and a magnetic shield. The winding support plate supports the winding. The magnetic shield includes a plurality of shield metal plates laminated in a first direction. The magnetic shield is superimposed on the winding support plate. The yoke is formed by a plurality of yoke metal plates. A plurality of yoke metal plates are laminated in a second direction intersecting the first direction. The magnetic shield is split into a plurality of split plates in a third direction. The third direction intersects the first direction and the second direction. A facing region is formed on the side surface of the yoke. The facing region faces the magnetic shield. The facing region is formed flatly by the end faces of the plurality of yoke metal plates.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD Embodiments of the present invention relate to a static induction appliance and a method for manufacturing a static induction appliance.

Static induction electric appliances such as transformers and reactors are often required to be downsized due to restrictions on transportation and installation space. Miniaturization of a static induction electric machine may increase leakage magnetic flux. Local overheating may occur when leakage magnetic flux is incident on the tank wall, supporting steel material, etc. around the stationary induction electric machine. Therefore, static induction electric appliances are required to take measures against the generation of leakage magnetic flux.

As a countermeasure against leakage magnetic flux, there is a technology that uses a magnetic shield called a "vertically stacked magnetic shield." This magnetic shield is formed by laminating a plurality of thin ferromagnetic metal plates side by side to form a plate as a whole. Since the magnetic shield of this structure has a smaller width of the surface where leakage magnetic flux is incident on the metal plate, loss due to eddy current can be suppressed.

However, the stacking magnetic shield requires time and effort to manufacture because it is necessary to laminate and bond the metal plates using a special jig. This problem can be solved by using a "flat magnetic shield" in which multiple metal plates are stacked in the thickness direction. However, since the flat-stacked magnetic shield has a large width of the surface where leakage magnetic flux is incident on the metal plate, the amount of heat generated by the leakage magnetic flux is greater than that of the vertical-stacked magnetic shield.

Japanese Patent No. 6158579 JP-A-8-298214 JP-A-4-155807

The problem to be solved by the present invention is to provide a stationary induction electric appliance and a method for producing the stationary induction electric appliance in which a magnetic shield can be easily produced and the amount of heat generated by leakage flux is small.

A stationary induction electric appliance of an embodiment has a core leg, a yoke, a winding, a winding support plate, and a magnetic shield. The core leg extends in a first direction. The yoke is provided at the end of the core leg. The winding is wound around the core leg. The winding support plate is formed along a plane intersecting the first direction. The winding support plate supports the windings. The magnetic shield is composed of a plurality of shield metal plates laminated in the first direction. The magnetic shield is overlaid on the winding support plate. The magnetic shield is plate-shaped. The yoke is formed of a plurality of yoke metal plates. The plurality of yoke metal plates are stacked in a second direction crossing the first direction. The magnetic shield is split into a plurality of split plates in the third direction. The third direction crosses the first direction and the second direction. A facing region is formed on the side surface of the yoke. The facing area faces the magnetic shield. The opposing region is formed flat by end faces of the plurality of yoke metal plates.

The side view which shows the stationary induction electric appliance of 1st Embodiment. FIG. 2 is a perspective view showing the magnetic shield of the static induction electric appliance of the first embodiment; FIG. 2 is a perspective view showing the yoke and magnetic shield of the static induction electric appliance of the first embodiment; FIG. 2 is a side view showing the yoke and magnetic shield of the static induction electric appliance of the first embodiment; FIG. 2 is a side view showing part of the yoke of the static induction electric appliance of the first embodiment; The side view which shows some yokes as a comparative form. The perspective view which shows the yoke and magnetic shield of the stationary induction electric appliance of 2nd Embodiment. The side view which shows some yokes of the static induction electric appliance of 2nd Embodiment. The side view which shows some yokes as a comparative form. The side view which shows some yokes of the static induction electric appliance of 3rd Embodiment. The side view which shows some yokes as a comparative form. The perspective view which shows the yoke and magnetic shield of the stationary induction electric appliance of 4th Embodiment. The perspective view which shows the magnetic shield of the stationary induction electric appliance of 4th Embodiment.

A stationary induction appliance and a method for manufacturing a stationary induction appliance according to embodiments will be described below with reference to the drawings.

In the following description, the Z direction, X direction, and Y direction of the XYZ orthogonal coordinate system are defined as follows. The Z direction is the vertical direction. The +Z direction is upward. The X direction is the front-to-rear direction of the static induction machine. The +X direction (to the right in FIG. 1) is in front of the static induction machine. The X direction is orthogonal to the Z direction. The Y direction is orthogonal to the Z and X directions. A plane along the Z direction and the X direction is called an XZ plane. A plane along the Z direction and the Y direction is called a YZ plane. A plane along the X and Y directions is called an XY plane. The Z direction is an example of a first direction. The X direction is an example of the second direction. The Y direction is an example of a third direction. These definitions do not limit the position of use of the static induction appliance. In this embodiment, the first, second and third directions are orthogonal to each other, but the first, second and third directions may intersect at an angle slightly deviating from 90°. . In each of the following embodiments, the same reference numerals are assigned to common configurations, and descriptions thereof may be omitted.

The stationary induction electric machine of the embodiment may be, for example, a reactor configured by winding a single-phase winding around an iron core leg. The stationary induction electric machine of the embodiment may be a transformer configured by winding multi-phase windings around core legs. The static induction electric appliance of the embodiment may be a gas-insulated static induction electric appliance using an insulating gas. The stationary induction electric appliance of the embodiment may be an oil-filled stationary induction appliance using insulating oil.

(First embodiment)
FIG. 1 is a side view showing a stationary induction appliance 10 of the first embodiment. FIG. 2 is a perspective view showing the magnetic shield 6. FIG. FIG. 3 is a perspective view showing the core yoke 2 and the magnetic shield 6. FIG. 2 and 3 are enlarged views of the portion indicated by "A" in FIG. FIG. 4 is a side view showing part of the core yoke 2 and the magnetic shield 6. FIG.

As shown in FIG. 1, a stationary induction electric machine 10 includes a core leg 1, a core yoke (yoke) 2, a fixing member 3, a winding 4, a winding support plate 5, a magnetic shield 6, a winding a support insulator 7; The core leg 1 and the core yoke 2 constitute the core.

The core leg 1 is made of metal. The core leg 1 has a columnar shape, a rectangular parallelepiped shape, or the like extending in the Z direction.
The core yoke 2 is provided at each of the upper end and the lower end of the core leg 1 when viewed from the Y direction. The core yoke 2 provided at the upper end of the core leg 1 is the first core yoke 2A. The core yoke 2 provided at the lower end of the core leg 1 is the second core yoke 2B.

As shown in FIG. 3 , the core yoke 2 is made up of a plurality of yoke metal plates 8 . The yoke metal plate 8 has a flat plate shape along the YZ plane. For example, the yoke metal plate 8 is formed in a rectangular shape having a pair of sides along the Y direction and a pair of sides along the Z direction. A plurality of yoke metal plates 8 are stacked in the X direction. The core yoke 2 shown in FIG. 3 is the second core yoke 2B (see FIG. 1).

In the portion including the X-direction end portion 2a of the core yoke 2, the height dimension (the Z-direction dimension) and the width dimension (the Y-direction dimension) of the yoke metal plate 8 are said to decrease closer to the end portion 2a. preferable.

As shown in FIG. 4 , a facing region 12 facing the magnetic shield 6 is formed on the side surface 2 b of the core yoke 2 . The facing area 12 is a flat surface along the XY plane. The opposing region 12 is formed by the end faces 8b of the inner edges 8a of the plurality of yoke metal plates 8. As shown in FIG. The inner edge 8 a corresponds to the side of the four sides of the rectangular yoke metal plate 8 that faces the winding 4 . The inner edge 8a extends in the Y direction. The inner edge 8a of the second core yoke 2B (see FIG. 1) corresponds to the upper side of the four sides of the rectangular yoke metal plate 8. As shown in FIG. The inner edge 8a of the first core yoke 2A (see FIG. 1) corresponds to the lower side of the four sides of the rectangular yoke metal plate 8. As shown in FIG. The opposing region 12 is formed by arranging a plurality of inner edges 8a at the same height in the X direction.

As shown in FIG. 1, the fixing member 3 has a flat plate shape along the YZ plane. The fixing members 3 are provided on the front and rear sides of the core yoke 2 when viewed in the Z direction. The fixing member 3 is formed to protrude from the outer surface 5a of the winding support plate 5 in the Z direction. The fixed member 3 extends in the Y direction. For example, the fixing member 3 is made of metal.

The winding 4 is constructed by winding a wire around the core leg 1 . When viewed from the Z direction, the winding 4 wound around the core leg 1 has an annular shape concentric with the core leg 1 when viewed from the Z direction. The winding 4 may be single-phase or multi-phase. For example, the wire is a conductor wire covered with an insulation coating.

A winding support plate 5 supports the winding 4 via a magnetic shield 6 and a winding support insulator 7 . The winding support plate 5 has a flat plate shape along the XY plane. The winding support plate 5 extends in the Y direction. The winding support plates 5 are provided on the front and rear sides of the core yoke 2 when viewed in the Z direction.

As shown in FIG. 2, the magnetic shield 6 is overlaid on the inner surface 5b of the winding support plate 5 (the surface opposite to the outer surface 5a). The magnetic shield 6 has a flat plate shape along the XY plane. The magnetic shield 6 as a whole has a rectangular shape having a pair of sides along the X direction and a pair of sides along the Y direction.

The magnetic shield 6 is composed of a plurality of laminated shield metal plates 9 . For example, the shield metal plate 9 is a silicon steel plate. The shield metal plate 9 has a flat plate shape along the XY plane. A plurality of shield metal plates 9 are stacked in the Z direction. The magnetic shield 6 is a flat magnetic shield because the shield metal plates 9 are stacked in the Z direction.

The magnetic shield 6 is divided into a plurality of parts in the Y direction. The magnetic shield 6 is composed of a plurality of split plates 11 arranged in the Y direction. In this embodiment, the magnetic shield 6 is divided into three. The dividing plate 11 has a rectangular shape having a pair of sides along the X direction and a pair of sides along the Y direction.

The dividing plate 11 is rectangular. The X-direction dimension (length L) of the dividing plate 11 is larger than the Y-direction dimension (width W). The plurality of split plates 11 are arranged at intervals in the Y direction. Therefore, adjacent split plates 11 are not in contact with each other. Note that the number of divisions of the magnetic shield 6 is not limited to three, and may be any number equal to or greater than two.

As shown in FIG. 3, a portion of the magnetic shield 6 (that is, a portion in the longitudinal direction of the split plate 11) is directed toward the core yoke 2 along the XY plane with respect to the winding support plate 5. procrastinating.

As shown in FIG. 4 , a portion of the magnetic shield 6 extending from the winding support plate 5 faces the facing region 12 of the core yoke 2 . More specifically, portions including leading ends 11 a of the plurality of split plates 11 face the opposing region 12 . The dividing plate 11 does not contact the opposing region 12 and is spaced from the opposing region 12 . The facing surface 11b of the dividing plate 11 and the facing region 12 face each other with a gap therebetween. The facing surface 11b and the facing region 12 are substantially parallel.

As shown in FIG. 1, winding support insulator 7 is interposed between winding 4 and magnetic shield 6 . The winding support insulator 7 has a plate shape along the XY plane.

Next, a method for manufacturing the stationary induction appliance of the first embodiment will be described. The manufacturing method of this embodiment is an example of a method of manufacturing the stationary induction appliance 10 shown in FIG. The manufacturing method of this embodiment has first to fourth steps.
As shown in FIG. 1 , in the first step, a wire is wound around a core leg 1 to form a winding 4 .

As shown in FIG. 3, in the second step, the core yoke 2 is formed by laminating a plurality of yoke metal plates 8 in the X direction. As shown in FIG. 4, when forming the core yoke 2, the opposing region 12 is formed by adjusting the mutual stacking positions of the plurality of yoke metal plates 8 so that the inner edge 8a has the same height. "y" shown in FIG. 4 is the width (dimension in the X direction) of the region where the dividing plate 11 and the facing region 12 face each other.

In the manufacturing method of this embodiment, the opposing region 12 can be formed using the same yoke metal plate 8 as a normal product. This will be described with reference to FIGS. 5 and 6. FIG. FIG. 6 is a side view showing part of a core yoke 402 as a comparative example. As shown in FIG. 6 , the core yoke 402 of the comparative example is a normal product that does not have the opposing region 12 . The four yoke metal plates 8 including the end portion 2a are referred to as yoke metal plates 8A to 8D, respectively. The height dimensions of the yoke metal plates 8A to 8D are d _1a , d _2a , d _3a and d _4a respectively.

FIG. 5 is a side view showing part of the core yoke 2 of the stationary induction electric machine 10. As shown in FIG. As shown in FIG. 5, in forming the core yoke 2 in the stationary induction electric machine 10, the facing region 12 is formed by adjusting the mutual lamination positions (height positions) of the plurality of yoke metal plates 8, as described above. Form. As the yoke metal plate 8, the same yoke metal plate 8 as a normal product can be used. As the four yoke metal plates 8 including the end portion 2a, the yoke metal plates 8A to 8D (see FIG. 6) can be used as they are. Therefore, the height dimensions d _1b , d _2b , d _3b and d _4b of the four yoke metal plates 8 are equal to d _1a , d _2a , d _3a and d _4a (see FIG. 6). That is, d _1a =d _1b , d _2a =d _2b , d _3a =d _3b and d _4a =d _4b .
As shown in FIG. 1, the core yokes 2 are provided at the upper and lower ends of the core leg 1 when viewed in the Y direction.

In this manufacturing method, the core yoke 2 can be easily manufactured because the normal yoke metal plate 8 can be used as it is only by changing the stacking position (height position).

As shown in FIG. 1, in the third step, winding support insulators 7 are formed on the top and bottom surfaces of the winding 4 . As shown in FIG. 3 , a magnetic shield 6 divided into a plurality of divided plates 11 is provided on the outer surface of the winding support insulator 7 . The magnetic shield 6 is arranged so that a part of the magnetic shield 6 faces the facing area 12 .
In a fourth step, the winding support plate 5 and the fixing member 3 are provided.
Through the above steps, the stationary induction electric appliance 10 is obtained.

Although the opposing region 12 is formed by four yoke metal plates 8 in FIG. 5, the number of yoke metal plates forming the opposing region is not particularly limited. For example, the facing area may be formed by two yoke metal plates, or may be formed by six yoke metal plates.

The stationary induction electric appliance 10 of the first embodiment uses a magnetic shield 6 (that is, a flat magnetic shield) composed of a plurality of shield metal plates 9 stacked in the Z direction. Therefore, the number of manufacturing steps is smaller than when vertically stacked magnetic shields are used. Therefore, manufacturing of the magnetic shield 6 is easy.

In the static induction electric appliance 10 of the first embodiment, the magnetic shield 6 along the XY plane is divided into multiple pieces in the Y direction (third direction). The Y direction is a direction that crosses the extending direction (Z direction) of the core leg 1 and the X direction. Therefore, the magnetic shield 6 is divided in a direction that is perpendicular to the incident direction of the leakage magnetic flux generated from the winding 4 and that does not hinder the flow of the magnetic flux within the magnetic shield 6 . Therefore, it is possible to suppress the generation of eddy current due to the incident leakage magnetic flux.

A portion of the magnetic shield that generates a large amount of heat is a portion that is close to the yoke, which is the return destination of the leaked magnetic flux absorbed by the magnetic shield. The reason why the magnetic shield tends to generate heat in the vicinity of the yoke is that the leakage magnetic flux absorbed by the magnetic shield tends to generate heat when moving through the gap with the yoke.

In the stationary induction electric machine 10 , a flat facing area 12 facing the magnetic shield 6 is formed on the side surface of the core yoke 2 . Therefore, the magnetic shield 6 and the core yoke 2 face each other over a large area. Therefore, the transfer magnetic flux density between the magnetic shield 6 and the core yoke 2 can be reduced, and the amount of heat generated can be suppressed. Since the static induction electric machine 10 can suppress the amount of heat generated, it can be suitably applied to a static induction electric machine with a large leakage magnetic flux, a gas-insulated static induction electric machine, and the like.

According to the manufacturing method of the stationary induction appliance of the first embodiment, the opposing region 12 of the core yoke 2 is formed by adjusting the stacking positions (height positions) of the yoke metal plates 8 . With this method, the core yoke 2 can be easily manufactured because the yoke metal plate 8 of a normal product can be used as it is only by changing the stacking position.

(Second embodiment)
FIG. 7 is a perspective view showing the core yoke 102 and the magnetic shield 6 of the stationary induction electric machine 110 of the second embodiment.
As shown in FIG. 7, a receiving recess 113 is formed in the side surface 102b of the core yoke 102. As shown in FIG. The receiving recess 113 is formed by an inner side surface 113a along the YZ plane and a bottom surface 113b along the XY plane. The receiving recess 113 is a groove-shaped recess extending in the Y direction.

The bottom surface 113 b serves as the facing area 112 . The opposing region 112 is formed by the end faces 108b of the inner edges 108a of the plurality of yoke metal plates 108. As shown in FIG. Receiving recess 113 receives a portion of split plate 11 including tip 11a.

Although the opposing region 112 is formed by four yoke metal plates 108 in FIG. 7, the number of yoke metal plates forming the opposing region is not particularly limited. For example, the facing area may be formed by two yoke metal plates, or may be formed by six yoke metal plates.

Next, a method for manufacturing the stationary induction appliance of the second embodiment will be described. The manufacturing method of this embodiment is an example of a method of manufacturing the stationary induction appliance 110 . In the manufacturing method of this embodiment, in the second step, the opposing region 112 is formed using the yoke metal plates 108 that are pre-formed so that the end face 108b forms a flat region when laminated. This will be described with reference to FIGS. 8 and 9. FIG.

FIG. 9 is a side view showing part of a core yoke 402 as a comparative example. As shown in FIG. 9 , the core yoke 402 of the comparative example is a normal product that does not have the opposing region 12 . In core yoke 402, four yoke metal plates 8 including end portion 2a are referred to as yoke metal plates 8A to 8D (see FIG. 6). The height dimensions of the yoke metal plates 8A to 8D are d _1a , d _2a , d _3a and d _4a respectively.

FIG. 8 is a side view showing part of the core yoke 102 of the stationary induction electric machine 110. FIG. As shown in FIG. 8, in forming the core yoke 102 in the stationary induction electric machine 110, as described above, the yoke metal plates 108 formed in advance are used so that the end face 108b forms a flat region when laminated. to form the opposing region 112 . For example, yoke metal plates 108A to 108D are used as the four yoke metal plates 108 including the end portion 2a.

The height dimensions d _1c , d _2c , d _3c , and d _4c of the yoke metal plates 108A to 108D satisfy d _1c =d _1a , d _2c <d _2a , d _3c <d _3a , and d _4c <d _4a . That is, the height dimension of the yoke metal plates 108B to 108D is smaller than the height dimension of the yoke metal plates 8B to 8D (see FIG. 9) which are normal products. By using the yoke metal plates 108B to 108D formed to reduce the height dimension, a receiving recess 113 is formed in the side surface of the core yoke 102. FIG.

The first, third and fourth steps may be the same as those of the manufacturing method of the first embodiment.

The static induction electric appliance 110 of the second embodiment is, like the first embodiment, a magnetic shield 6 composed of a plurality of shield metal plates 9 stacked in the Z direction (that is, a flat magnetic shield). to use. Therefore, the magnetic shield 6 is easier to manufacture than when vertically stacked magnetic shields are used.

A stationary induction electric machine 110 has a flat facing area 112 facing the magnetic shield 6 on the side surface 102b of the core yoke 102, as in the first embodiment. Therefore, the magnetic shield 6 and the core yoke 102 face each other over a wide area. Therefore, the transfer magnetic flux density between the magnetic shield 6 and the core yoke 102 can be reduced, and the amount of heat generated can be suppressed.

According to the manufacturing method of the static induction appliance of the second embodiment, the opposing region 112 is formed by using the yoke metal plates 108 preliminarily formed so that the end face 108b forms a flat region when laminated. Therefore, by selecting the shape and size of the yoke metal plate 108, it is possible to form the facing region 112 having an area suitable for the purpose. Therefore, the magnetic flux density reduction effect can be adjusted.

(Third embodiment)
FIG. 10 is a side view showing part of the core yoke 302 of the stationary induction machine 310 of the third embodiment. As shown in FIG. 10, a side surface 302b of the core yoke 302 is formed with a facing region 12 (see FIG. 5). The opposing region 12 is formed by the end faces 308b of the inner edges 308a of the plurality of yoke metal plates 308. As shown in FIG.

Next, a method for manufacturing the stationary induction appliance of the third embodiment will be described. The manufacturing method of this embodiment is an example of a method of manufacturing the stationary induction appliance 310 . In the manufacturing method of this embodiment, in the second step, the facing region 12 is formed using the yoke metal plates 308 that are pre-formed so that the end face 308b forms a flat region when laminated. This will be described with reference to FIGS. 10 and 11. FIG.

FIG. 11 is a side view showing part of a core yoke 402 as a comparative example. As shown in FIG. 11 , the core yoke 402 of the comparative example is a normal product that does not have the opposing region 12 . In the core yoke 402, the height dimensions of the yoke metal plates 8A to 8D (see FIG. 6) including the end portion 2a are d _1a , d _2a , d _3a and d _4a respectively.

As shown in FIG. 10, in forming the core yoke 302 in the stationary induction electric machine 310, as described above, the yoke metal plates 308 formed in advance so that the end face 308b forms a flat region when laminated are used. to form the opposing region 12 . For example, yoke metal plates 308A to 308D are used as the four yoke metal plates 308 including the end portion 2a.

The height dimensions d _1d , d _2d , d _3d and d _4d of the yoke metal plates 308A to 308D satisfy d _1d >d _1a , d _2d >d _2a , d _3d >d _3a and d _4d =d _4a . That is, the height dimension of the yoke metal plates 308A to 308C is larger than the height dimension of the yoke metal plates 8A to 8C (see FIG. 11) which are normal products. By using the yoke metal plates 308A to 308C formed so as to increase the height dimension, the opposing region 12 is formed on the side surface of the core yoke 302, like the core yoke 2 in the first embodiment.

The first, third and fourth steps may be the same as those of the manufacturing method of the first embodiment.

The stationary induction electric appliance 310 of the third embodiment is, like the first embodiment, a magnetic shield 6 composed of a plurality of shield metal plates 9 stacked in the Z direction (that is, a flat magnetic shield). to use. Therefore, the magnetic shield 6 is easier to manufacture than when vertically stacked magnetic shields are used.

A stationary induction electric machine 310 has a flat facing region 12 facing the magnetic shield 6 on the side surface 302b of the core yoke 302, as in the first embodiment. Therefore, the magnetic shield 6 and the core yoke 302 face each other over a wide area. Therefore, the transfer magnetic flux density between the magnetic shield 6 and the core yoke 302 can be reduced, and the amount of heat generated can be suppressed.

According to the manufacturing method of the static induction appliance of the third embodiment, the opposing region 12 is formed by using the yoke metal plates 308 preliminarily formed so that the end faces 308b form a flat region when laminated. Therefore, by selecting the shape and size of the yoke metal plate 308, it is possible to form the facing region 12 having an area suitable for the purpose. Therefore, the magnetic flux density reduction effect can be adjusted.

(Fourth embodiment)
FIG. 12 is a perspective view showing the core yoke 2 and the magnetic shield 206 of the stationary induction electric machine 210 of the fourth embodiment. FIG. 13 is a perspective view showing the split plate 211 that constitutes the magnetic shield 206. As shown in FIG.
As shown in FIG. 12, the dividing plate 211 has a slit-shaped notch 213 formed in the length direction (X direction) from the tip 211a. The notch 213 is formed penetrating from one surface of the dividing plate 211 to the other surface. A portion of the dividing plate 211 including the tip 211a (the portion facing the opposing region 12) is divided into a plurality of pieces in the Y direction by the cuts 213. As shown in FIG.

As shown in FIG. 13, the length L1 of the notch 213 is preferably equal to or greater than the width y (see FIGS. 12 and 4) of the region where the dividing plate 211 and the facing region 12 face each other. The number of cuts 213 may be one or plural.

In the stationary induction electric appliance 210 of the fourth embodiment, a notch 213 is formed along the length direction (X direction) of the split plate 211 in a portion of the split plate 211 facing the opposing region 12, so that the opposing region 12, the effective width dimension of the dividing plate 211 can be reduced. Therefore, it is possible to suppress the eddy current caused by the incident leakage magnetic flux. Therefore, the amount of heat generated can be further suppressed.

When multiple cuts 213 are formed, the multiple cuts 213 are formed at intervals in the Y direction. The dividing plate 211 having a plurality of notches 213 can further suppress eddy currents.

According to at least one of the embodiments described above, the magnetic shield 6 (that is, a magnetic shield in a flat configuration) is used which is composed of a plurality of shield metal plates 9 stacked in the Z direction. Therefore, the magnetic shield 6 is easier to manufacture than when vertically stacked magnetic shields are used.

In the stationary induction electric machine 10, the magnetic shield 6 along the XY plane is divided into a plurality of parts in the Y direction (third direction). Therefore, it is possible to suppress the generation of eddy current due to the incident leakage magnetic flux. In the stationary induction electric machine 10 , a flat facing area 12 facing the magnetic shield 6 is formed on the side surface of the core yoke 2 . Therefore, the magnetic shield 6 and the core yoke 2 face each other over a large area. Therefore, the transfer magnetic flux density between the magnetic shield 6 and the core yoke 2 can be reduced, and the amount of heat generated can be suppressed.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1... Core leg 2, 102, 302... Core yoke (yoke) 2b, 102b, 302b... Side surface 4... Winding 5... Winding support plate 6, 206... Magnetic shield 8, 108... Yoke metal Plates 8b, 108b... End face 9... Shield metal plate 10, 110, 210, 310... Stationary induction electric appliance 11, 211... Divided plate 12, 112... Opposite area 213... Notch X... X direction (first 2 direction), y... width of the area where the dividing plate and the opposing area face each other, Y... Y direction (third direction), Z... Z direction (first direction).

Claims (5)

core legs extending in the first direction;
a yoke provided at the end of the core leg;
a winding wound around the core leg;
a winding support plate formed along a plane intersecting the first direction and supporting the winding;
a plate-shaped magnetic shield composed of a plurality of shield metal plates stacked in the first direction and superimposed on the winding support plate;
with
the yoke is formed of a plurality of yoke metal plates laminated in a second direction crossing the first direction;
the magnetic shield is divided into a plurality of divided plates in a third direction intersecting the first direction and the second direction;
A facing region facing the magnetic shield is formed on a side surface of the yoke,
The stationary induction electric machine, wherein the opposing region is formed flat by the end faces of the plurality of yoke metal plates. 2. The stationary induction electric appliance according to claim 1, wherein said dividing plate has one or a plurality of slit-like cuts formed in a portion facing said facing region to divide this portion into a plurality of portions in said third direction. 3. The stationary induction electric machine according to claim 2, wherein the length of said cut is equal to or greater than the width of the region where said dividing plate and said facing region face each other. a first step of winding a wire around a core leg extending in a first direction to form a winding;
a second step of forming a yoke by stacking a plurality of yoke metal plates in a second direction intersecting the first direction, and providing the yoke at an end of the core leg;
A third magnetic shield comprising a plurality of shield metal plates stacked in the first direction and divided into a plurality of divided plates in a third direction intersecting the first direction and the second direction. process and
a fourth step of providing a winding support plate for supporting the winding along a plane intersecting the first direction;
including
In the second step, in forming the yoke, a flat opposing region facing the magnetic shield is formed on the side surface of the yoke by the end faces of the plurality of yoke metal plates, and the opposing region comprises a plurality of Formed by adjusting the mutual stacking position of the yoke metal plates,
A method of manufacturing a static induction electric appliance, wherein in the third step, a portion of the magnetic shield is arranged to face the facing region. a first step of winding a wire around a core leg extending in a first direction to form a winding;
a second step of forming a yoke by stacking a plurality of yoke metal plates in a second direction intersecting the first direction, and providing the yoke at an end of the core leg;
A third magnetic shield comprising a plurality of shield metal plates stacked in the first direction and divided into a plurality of divided plates in a third direction intersecting the first direction and the second direction. process and
a fourth step of providing a winding support plate for supporting the winding along a plane intersecting the first direction;
including
In the second step, in forming the yoke, a flat opposing region facing the magnetic shield is formed on the side surface of the yoke by the end faces of the plurality of yoke metal plates, and the opposing region is laminated. sometimes formed by laminating the yoke metal plates that have been formed in advance so that the end faces form the facing regions;
A method of manufacturing a static induction electric appliance, wherein in the third step, a portion of the magnetic shield is arranged to face the facing region.

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