JP6158579B2 - Static induction machine - Google Patents

Description

  The present invention relates to a static induction electric machine, and more particularly, to a static induction electric machine having an improved magnetic shield structure in an iron core fastening bracket arranged in the vertical direction of a winding.

  Normally, in a static induction electric machine composed of an iron core consisting of an iron core leg and an iron core yoke, and a winding wound around the iron core leg, particularly when a large iron core is used, the iron core is loaded. It is tightened from both sides in the thickness direction with upper and lower iron core clamps to hold the core shape firmly and hold the windings using upper and lower iron core clamps.

  Since the above-described iron core fastening fitting requires mechanical strength, a metal (for example, iron, stainless steel, etc.) is used as a material. In addition, since the iron core clamp is disposed above and below the vicinity of the winding, an eddy current flows through the iron core clamp due to leakage magnetic flux from the coil, and eddy current loss (heat) occurs. In order to reduce this eddy current loss, a shield made of a nonmagnetic material may be used.

  On the other hand, it is known that eddy current loss occurs due to leakage magnetic flux even in the electric wire constituting the winding. In particular, since the magnetic flux density has various directional components at the upper and lower ends of the winding, the leakage magnetic flux tends to be larger than that at the center of the winding.

  Moreover, in recent years, static induction electric appliances have become smaller and leakage magnetic flux density tends to increase in order to reduce manufacturing costs. Further, in order to reduce the loss due to the leakage magnetic flux, it is desired to reduce the eddy current loss in the winding part, the loss in the iron core clamp, and the loss of the shield as a whole.

  As a means for reducing the above-described leakage loss, it has been proposed to use a magnetic shield made by stacking a plurality of silicon steel plates.

  For example, Patent Document 1 discloses a shield in which a plurality of ribbon-shaped silicon steel plates are stacked and formed into a disk shape, and a shield in which rib members are integrally fixed. Patent Document 2 discloses a structure in which a magnetic shield produced by laminating flat silicon steel plates is surrounded by a sound absorbing material and attached to a clamp for attaching a coil. Patent Document 3 discloses a structure in which a magnetic shield made of a material having high magnetic permeability (silicon steel plate) is installed on the surface of the iron core fastener that faces the coil. Furthermore, Patent Document 4 discloses a shield in which a magnetic shield (magnetic clamp) formed by laminating a plurality of ribbon-shaped silicon steel plates in a straight line is disposed in the vicinity of upper and lower fastening brackets (support members). ing.

JP 61-99314 A JP 09-293622 A Japanese Patent Laid-Open No. 08-288153 JP 58-139415 A

  In the structure of Patent Document 1, since the leakage magnetic flux flows toward the magnetic shield, there is an effect of reducing the occurrence of eddy current loss at the winding end. However, it is difficult for the magnetic flux to move between the silicon steel sheets, and the magnetic flux flows into or out of the iron core via the member that supports the iron core, so that the loss reduction effect is not sufficient. In addition, the disk-shaped magnetic shield is difficult to manufacture, and there is a problem that manufacturing cost and installation cost are high. Moreover, in the structure of patent document 2 and patent document 3, although generation | occurrence | production of the loss in a magnetic shield is small, magnetic flux crosses from the magnetic shield to the clamp (patent document 2) and the clamp | tightening metal fitting (patent document 3) behind it, Therefore, there is a problem that a large loss occurs. Furthermore, in the structure of Patent Document 4, the magnetic shield can significantly reduce the eddy current loss of the upper and lower iron core clamps, but the magnetic flux density component that crosses the electric wire constituting the winding at the winding end is reduced. This is not easy, and it is difficult to reduce the eddy current loss of the winding.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to occur in a winding eddy current loss caused by leakage magnetic flux from the winding, an iron core clamp, and a magnetic shield for reducing loss. An object of the present invention is to provide a static induction device capable of reducing loss as a whole.

In order to achieve the above object, a static induction electric machine according to the present invention includes an iron core composed of an iron core leg portion and an iron core yoke formed by laminating a plurality of silicon steel plates, and a winding wound around the iron core leg portion. comprising lines and an upper and lower core clamping bracket is positioned above and below the windings fastening and fixing the core, and a magnetic shield disposed between each said winding of said upper and lower core clamping bracket the axial distance between the upper core clamping bracket and the magnetic shield disposed in said upper portion, with being made size rather configured than the radial distance between the magnetic shield disposed in said upper and said core, each The magnetic shield is divided into three in the longitudinal direction of the upper and lower iron core clamps, the rolling direction of the silicon steel plate of the magnetic shield located in the center is perpendicular to the rolling direction of the silicon steel plate constituting the iron core, and The rolling direction of the silicon steel plate of the magnetic shield located at the end is perpendicular to the rolling direction of the silicon steel plate of the magnetic shield located at the central portion, and the magnetic shield located at the central portion has a rectangular planar shape And the planar shape of the magnetic shield located in the said both ends is trapezoid, It is characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the loss which generate | occur | produces in the eddy current loss of a coil | winding resulting from the leakage magnetic flux from a coil | winding, a core clamp metal fitting, and a magnetic shield for loss reduction can be reduced as a whole.

It is a longitudinal cross-sectional view which shows the principal part of the transformer which is Example 1 of the static induction appliance of this invention. It is a top view which shows arrangement | positioning (lower half) of the structure above the coil | winding in the transformer of FIG. 1, and positional relationship (upper half) with another structure. It is a bottom view which shows the arrangement | positioning (lower half) of the structure below the coil | winding in the transformer of FIG. 1, and positional relationship (upper half) with another structure. It is the side view which looked at the laminated magnetic body attachment structure from the side of the upper iron core clamp in Example 1 of the present invention. It is the front view which looked at the laminated magnetic body attachment structure from the front of the upper iron core clamp in Example 1 of the present invention. It is a characteristic view which shows the relationship between the position of the laminated magnetic body in Example 1 of this invention, and the loss generate | occur | produced by a leakage magnetic flux. It is a top view which shows arrangement | positioning (lower half) of the structure above the coil | winding in the transformer of Example 2 of the static induction machine of this invention, and positional relationship (upper half) with another structure. It is a bottom view which shows the arrangement | positioning (lower half) of the structure under a coil | winding in the transformer of Example 2 of the static induction device of this invention, and the positional relationship (upper half) with another structure. It is a top view which shows arrangement | positioning (lower half) of the structure above a coil | winding in the transformer of Example 3 of the static induction machine of this invention, and positional relationship (upper half) with another structure. It is a top view which shows arrangement | positioning (lower half) of the structure above a coil | winding in the transformer of Example 4 of the static induction machine of this invention, and positional relationship (upper half) with another structure. It is a longitudinal cross-sectional view which shows the principal part of the transformer which is Example 5 of the static induction appliance of this invention. It is a bottom view which shows arrangement | positioning (lower half) of the structure above a coil | winding in the transformer of Example 5 of the static induction machine of this invention, and positional relationship (upper half) with another structure. It is a longitudinal cross-sectional view which shows the principal part of the transformer which is Example 6 of the static induction appliance of this invention.

  Hereinafter, the static induction machine of this invention is demonstrated based on the illustrated Example. In addition, a code | symbol uses the same code | symbol for the same component in each Example.

  FIG. 1 shows the configuration of a transformer that is a first embodiment of a static induction electric machine according to the present invention, and FIGS. 2 and 3 show the arrangement of lower and upper structures in the transformer of this embodiment (lower half). And the positional relationship (upper half) with other structures is shown. 2 and 3 show the center main leg and its vicinity out of the transformer core composed of three main legs (the same applies to the other embodiments described below). .

  As shown in FIG. 1, the main part of the transformer according to the first embodiment of the present invention includes a core leg 1A and a core yoke 1B formed by laminating a plurality of silicon steel plates in the radial direction (y direction). And the high-voltage side winding 4 and the low-voltage side winding 5 wound around the iron core leg 1A. The iron core 1 is disposed above the high-voltage side winding 4 and the low-voltage side winding 5. The upper core fastening metal fitting 2 and the lower iron core fastening metal fitting 3 arranged below the high voltage side winding 4 and the low voltage side winding 5 are fixed.

  The upper iron core clamp 2 is formed in a U-shaped cross section comprising a vertical plate 2a, an upper plate 2b, and a lower plate 2c, and an overhang structure 11 is provided on the lower plate 2c of the upper iron core clamp 2. A winding pressing member 13 attached to the structure 11 forms an upper insulator 6 and an upper channel structure (a channel through which cooling oil for cooling the high-voltage side winding 4 and the low-voltage side coil 5 flows. The structure is such that the high-voltage side winding 4 and the low-voltage side winding 5 are tightened via 7.

  In addition, a magnetic shield 10 in which a plurality of silicon steel plates are laminated in the axial direction (z direction) and integrally formed is disposed between the upper iron core clamp 2 and the high-voltage side winding 4 and the low-voltage side winding 5. The magnetic shield 10 is fixed by a magnetic shield mounting structure 12 made of stainless steel.

  In this embodiment, the magnetic shield 10 and the lower plate 2c of the upper iron core clamp 2 are separated from each other in the axial direction (z direction) by H, and the iron core side end of the magnetic shield 10 and the iron core are separated from each other. 1 is arranged such that the distance in the radial direction (y direction) is L, and the magnetic shield 10 is arranged so that the axial distance H is larger than the radial distance L.

  On the other hand, the lower iron core fastening bracket 3 is formed in a U-shaped cross section comprising a vertical plate 3a, an upper plate 3b, and a lower plate 3c, and a lower flow path structure 8 is formed on the upper plate 3b of the lower iron core fastening bracket 3. (Which forms a flow path for flowing cooling oil for cooling the high-voltage side winding 4 and the low-voltage side winding 5) and the lower insulator 9 are arranged, and the high-voltage side winding 4 and the low-voltage side winding 5 are placed below Support from the side. A magnetic shield 20 in which a plurality of silicon steel plates are laminated in the axial direction and integrally formed is embedded in a part of the lower insulator 9.

  Next, the magnetic shield 10 disposed above the high-voltage side winding 4 and the low-voltage side winding 5 will be described in detail.

  As shown in FIG. 2, the magnetic shield 10 of the present embodiment is divided into three in the longitudinal direction (x direction) of the upper iron core clamp 2, and the central magnetic shield 10 a and the two arranged at both ends of the central magnetic shield 10 a. The central magnetic shield 10a is formed in a rectangular shape, and the two end magnetic shields 10b are formed in a trapezoidal shape.

  In the present embodiment, the center magnetic shield 10a and the end magnetic shield 10b are formed by rolling the silicon steel sheet in which the rolling direction of the silicon steel sheet (the arrow direction (y direction) in the lower half of FIG. 2) constitutes the iron core 1. It arrange | positions so that it may become a right angle with a direction (z direction).

  The central magnetic shield 10a and the two end magnetic shields 10b are perpendicular to the rolling direction (z direction) of the silicon steel plate constituting the iron core 1 when the plane of the silicon steel plate is in the horizontal direction (y direction). Or the planes of the central magnetic shield 10a and the two end magnetic shields 10b are perpendicular to the rolling direction (z direction) of the silicon steel sheet constituting the iron core 1 in the vertical direction (z direction). Are arranged.

  The upper half of FIG. 2 shows the positional relationship between the upper iron core clamp 2 and the magnetic shield 10, the iron core 1, the high voltage side winding 4 and the low voltage side winding 5. As shown in the figure, since the central magnetic shield 10a and the end magnetic shield 10b are arranged so as to substantially cover the gap between the high-voltage side winding 4 and the low-voltage side winding 5, It is easy to collect leakage magnetic flux from the low-voltage side winding 5.

  The central magnetic shield 10a and the end magnetic shield 10b are formed by immersing a stack of silicon steel plates cut into respective shapes (for example, 150 sheets) in a liquid resin and then solidifying by applying heat. It is what is done.

  Next, the magnetic shield 20 disposed below the high-voltage side winding 4 and the low-voltage side winding 5 will be described in detail.

  As shown in FIG. 3, the magnetic shield 20 of the present embodiment is divided into three in the longitudinal direction (x direction) of the lower iron core fastening fitting 3, and is disposed at both ends of the central magnetic shield 20a and the two central magnetic shields 20a. Further, the planar shape of the central magnetic shield 20a is rectangular, and the planar shape of the two end magnetic shields 20b is trapezoidal.

  In the present embodiment, the center magnetic shield 20a and the end magnetic shield 20b are formed by rolling the silicon steel sheet in which the rolling direction of the silicon steel sheet (the arrow direction (y direction) in the lower half of FIG. 3) constitutes the iron core 1. It arrange | positions so that it may become a right angle with a direction (z direction).

  The central magnetic shield 20a and the end magnetic shield 20b are arranged so that the plane of the silicon steel plate is perpendicular to the rolling direction (z direction) of the silicon steel plate constituting the iron core 1 in the horizontal direction (y direction). Or arranged such that the planes of the central magnetic shield 20a and the end magnetic shield 20b are perpendicular to the rolling direction (z direction) of the silicon steel sheet constituting the iron core 1 in the vertical direction (z direction). It is what.

  The upper half of FIG. 3 shows the positional relationship between the lower core fastening metal fitting 3 and the magnetic shield 20, the iron core 1, the high-voltage side winding 4, and the low-voltage side winding 5. As shown in the figure, the central magnetic shield 20 a and the two end magnetic shields 20 b are arranged so as to substantially cover the gap between the high-voltage side winding 4 and the low-voltage side winding 5.

  The manufacturing method of the central magnetic shield 20a and the end magnetic shield 20b is the same as the manufacturing method of the central magnetic shield 10a and the end magnetic shield 10b described above.

  Next, details of the magnetic shield mounting structure 12 will be described with reference to FIGS.

  As shown in the figure, the magnetic shield mounting structure 12 is composed of an upper iron core fastening bracket side support member 12a, an overhang structure side support member 12b, a magnetic shield holding case 12c, and a magnetic shield sealing member 12d. Each is made using a non-magnetic material (in this embodiment, made of stainless steel).

  The above-described magnetic shield holding case 12c is a frame-like structure made of narrow stainless steel for the purpose of suppressing the occurrence of loss at the same part. The magnetic shield sealing member 12d is fixed by screwing or welding after the magnetic shield 10 is inserted into the magnetic shield holding case 12c.

  Further, the magnetic shield holding case 12c into which the magnetic shield 10 is inserted has the iron core 1 side over the upper iron core clamp metal support member 12a via the upper iron core clamp metal support member 12a and the anti-iron core 1 side overhanging structure side support member. Each is fixed to the overhanging structure 11 via 12b.

  When the weight of the magnetic shield 10 is small, all or part of the magnetic shield mounting structure 12 may be made of an insulator such as fiber reinforced plastic.

  As described above, the rolling direction of the silicon steel plate constituting the iron core 1 faces the vertical direction (z direction) in parallel with the vertical plate 2a of the upper iron core fastening fitting 2, and the silicon steel plate constituting the magnetic shield 10 is rolled. The direction (y direction) is substantially perpendicular. As a result, the magnetic flux can be transferred from the magnetic shield 10 to the iron core 1 without causing concentration of the magnetic flux.

  Next, the effect of reducing the loss in this embodiment will be described.

  FIG. 6 shows the relationship between the position of the magnetic shield 10 and the loss generated by the leakage magnetic flux from the high-voltage side winding 4 and the low-voltage side winding 5, and the horizontal axis shows the magnetic shield 10 and the upper iron core clamp 2. A value obtained by dividing the distance H from the lower plate 2c by the distance L between the iron core side end of the magnetic shield 10 and the iron core 1, and the vertical axis represents the total loss generated by the leakage magnetic flux, and the upper and lower magnetic shields The generated loss when 10 and 20 are not used is shown as 100%.

  As is apparent from the figure, the loss generated by the leakage magnetic flux decreases as H / L increases from 0, but it is gradually saturated when H / L exceeds 1.

  As described above, in this embodiment, the leakage magnetic flux from the high voltage side winding 4 and the low voltage side winding 5 flows mainly to the magnetic shield 10, but the distance H between the magnetic shield 10 and the lower plate 2 c of the upper iron core clamp 2. However, since the leakage magnetic flux from the magnetic shield 10 flows so as to be taken into the iron core 1, the high-voltage side winding is formed so as to be larger than the distance L between the iron core side end of the magnetic shield 10 and the iron core 1. The magnetic flux traversing the electric wires constituting the wire 4 and the low voltage side winding 5 can be reduced, and the eddy current loss of the high voltage side winding 4 and the low voltage side winding 5 can be reduced. Further, since the magnetic flux entering the upper iron core fastening bracket 2 can be greatly reduced and the generated loss of the magnetic shield 10 is less than that of a nonmagnetic shield or the like, the upper and lower iron core fastening fittings 2 and 3 and the upper and lower magnetic shields 10 are provided. And the loss which generate | occur | produces by 20 can be reduced. As a result, the transformer as a whole has an effect of reducing generation loss due to leakage magnetic flux.

  In the above-described embodiment, the magnetic shields 10 and 20 are divided into three parts. However, the magnetic shields 10 and 20 may be formed as a single body (the same applies to other embodiments described below). By configuring the magnetic shields 10 and 20 as a single body, there are merits such as easy creation, mechanical strength, and easy fixing.

  7 and 8 show a transformer according to a second embodiment of the static induction device of the present invention. This figure shows the arrangement (lower half) of the structure above and below the winding in the transformer and the positional relationship with the other structure (upper half).

  In Example 1, a plurality of divided magnetic shields having the same rolling direction of the silicon steel plates constituting the magnetic shields 10 and 20 were used, but in this example, the rolling direction of the silicon steel plates constituting the magnetic shields 10 and 20 was used. This is an example using a plurality of divided magnetic shields having different values.

  As shown in FIG. 7, the magnetic shield 10 above the winding of the present embodiment is also divided into three in the longitudinal direction (x direction) of the upper iron core clamp 2 in the same manner as in the first embodiment. The two end magnetic shields 10b are arranged at both ends of the shield 10a, and the planar shape of the central magnetic shield 10a is rectangular and the two end magnetic shields 10b are trapezoidal. In this embodiment, the central magnetic shield 10a is arranged such that the rolling direction (y direction) of the silicon steel sheet is perpendicular to the rolling direction (z direction) of the silicon steel sheet constituting the iron core 1, and The rolling directions (x direction) of the silicon steel plates of the two end magnetic shields 10b are arranged so as to be perpendicular to the rolling direction (y direction) of the silicon steel plates of the central magnetic shield 10a.

  Similarly, as shown in FIG. 8, the magnetic shield 20 below the winding is also divided into three in the longitudinal direction (x direction) of the lower iron core fastening fitting 3, and is arranged at both ends of the central magnetic shield 20a and the central magnetic shield 20a. Two end magnetic shields 20b, the planar shape of the central magnetic shield 20a is rectangular and the planar shape of the two end magnetic shields 20b is trapezoidal, and the central magnetic shield 20a is The rolling direction (y direction) of the silicon steel plate is arranged so as to be perpendicular to the rolling direction (z direction) of the silicon steel plate constituting the iron core 1, and the rolling direction of the silicon steel plate of the two end magnetic shields 20b. (X direction) is arranged so as to be perpendicular to the rolling direction (y direction) of the silicon steel plate of the central magnetic shield 20a. Other configurations are the same as those of the first embodiment.

  By adopting such a configuration of the present embodiment, the same effects as those of the first embodiment can be obtained, and the leakage magnetic flux generated in the high-voltage side winding 4 and the low-voltage side winding 5 is caused by the end magnetic shield 20b. And then flows in the rolling direction (x direction) of the silicon steel sheet, and further flows into the iron core 1 through the central magnetic shield 10a in the rolling direction (y direction) of the silicon steel sheet. There is an effect of reducing the leakage magnetic flux. In addition, the central magnetic shield 20a and the end magnetic shield 20b disposed below the winding also generate a flow similar to the magnetic flux flow of the magnetic shield 10 disposed above the winding described above. There is an effect of reducing the leakage magnetic flux.

  FIG. 9 shows a transformer according to a third embodiment of the static induction appliance of the present invention. The figure shows the arrangement (lower half) of the structure above the winding in the transformer and the positional relationship with the other structure (upper half).

  The present embodiment shown in FIG. 9 is almost the same as the configuration of the second embodiment shown in FIG. 7, but the silicon steel plate whose planar shape is not trapezoidal but rectangular as the end magnetic shield of the magnetic shield 10 above the winding. The difference is that the end magnetic shield 10c constituted by the above is used. That is, the central magnetic shield 10a divided into three and the two end magnetic shields 10c are all rectangular in plan view. Moreover, in this embodiment, the two end magnetic shields 10c located at both ends thereof are formed to have a smaller cross-sectional area than the central magnetic shield 10a.

  By adopting such a configuration of the present embodiment, the same effects as those of the first embodiment can be obtained, and the cost for manufacturing the magnetic shield 10 can be reduced.

  Although a detailed description is omitted, a magnetic shield having the same shape can be used for the magnetic shield 20 below the winding.

  FIG. 10 shows a transformer according to a fourth embodiment of the static induction appliance of the present invention. The figure shows the arrangement (lower half) of the structure above the winding in the transformer and the positional relationship with the other structure (upper half).

  The present embodiment shown in FIG. 10 is almost the same as the configuration of the second embodiment shown in FIG. 7, except that another end magnetic shield 10d is arranged on the main leg side other than the end magnetic shield 10c, The magnetic shield 10 is disposed substantially without a break at the lower part of the iron core clamp 2.

  The end magnetic shield 10c has a smaller cross-sectional area than the central magnetic shield 10a, and the end magnetic shield 10c and the end magnetic shield 10d have substantially the same cross-sectional area. The rolling direction (y direction) of the silicon steel plates of the central magnetic shield 10a and the end magnetic shields 10c and 10d is the same, and is arranged so as to be perpendicular to the rolling direction (z direction) of the silicon steel plates constituting the iron core 1. It is what has been.

  By adopting such a configuration of the present embodiment, the same effects as those of the first embodiment can be obtained, and the magnetic flux taken into the upper core fastening bracket 2 located between the central main leg and the other main legs. There is an effect that the loss caused by the leakage magnetic flux can be further reduced.

  11 and 12 show a transformer according to a fifth embodiment of the static induction device of the present invention. FIG. 12 shows the arrangement (lower half) of the structure below the winding in the transformer and the positional relationship with the other structure (upper half).

  The present embodiment shown in FIGS. 11 and 12 is almost the same as the configuration of the first embodiment shown in FIGS. 1 to 3, but the lower core fastening bracket used for the large-capacity transformer has a box-type structure. It is an example.

  That is, the present embodiment is the same as the structure shown in FIGS. 1 to 3 except for the lower iron core clamp and the structure in the vicinity thereof, but in this embodiment, a box-shaped lower iron core clamp 33 is used. The iron core 1 is fastened and fixed by the box-shaped lower iron core fastening bracket 33, and an oil passage 35 for cooling is formed inside the box-shaped lower iron fitting 33, and the mineral oil that has flowed through the oil passage 35 is formed. A part of the current flows through the oil introduction hole 37 provided in the upper part of the box-shaped lower fastening fitting 33 to the high-voltage side winding 4 and the low-voltage side winding 5.

  In this embodiment, as shown in FIG. 11, the magnetic shield 30 is embedded in the lower insulator 9, and the magnetic shield 30 is formed in a rectangular shape in plan view as shown in FIG. Two magnetic shields 30b arranged away from the oil introduction hole 37 and another magnetic member having a larger cross-sectional area than the magnetic shield 30b and connecting between the two magnetic shields 30b arranged away from the oil introduction hole 37 It is comprised from the shield 30a. The rolling direction (y direction) of the silicon steel plates constituting the two magnetic shields 30b is arranged so as to be perpendicular to the rolling direction (z direction) of the silicon steel plates constituting the iron core 1, and another magnetic shield. The rolling direction (x direction) of the silicon steel plate constituting 30a is arranged to be perpendicular to the rolling direction (y direction) of the silicon steel plate constituting the magnetic shield 30b.

  By adopting such a configuration of the present embodiment, the same effect as that of the first embodiment can be obtained, and the magnetic flux transferred to the magnetic shields 30a and 30b is arranged so as to avoid the oil introduction hole 37, and two magnetic fields can be obtained. The shield 30b can be transferred to the iron core 1, and the silicon steel plate constituting the iron core 1 and the silicon steel plate constituting the two magnetic shields 30b arranged away from the oil introduction hole 37 of the iron core 1 are substantially perpendicular to each other. Since the magnetic flux concentration is avoided and the oil introduction hole 37 is arranged and the two magnetic shields 30b can be transferred to the iron core 1, the effect of reducing the loss generated by the magnetic shields as a whole is remarkable. It is.

  FIG. 13 shows a transformer according to a sixth embodiment of the static induction appliance of the present invention. The present embodiment shown in FIG. 13 is almost the same as the configuration of the first embodiment shown in FIGS. 1 to 3, but has a structure in which the magnetic shield 10 disposed above the winding is embedded in the insulator 6. ing.

  By adopting such a configuration of the present embodiment, the same effects as those of the first embodiment can be obtained, and the magnetic shield 10 can be easily fixed.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Iron core, 1A ... Iron core leg, 1B ... Iron core yoke, 2 ... Upper iron core clamp, 2a ... Vertical plate of upper iron core clamp, 2b ... Upper plate of upper iron core clamp, 2c ... Upper iron core clamp Lower plate, 3 ... Lower iron core clamp, 3a ... Lower iron plate vertical plate, 3b ... Lower iron plate upper plate, 3c ... Lower iron plate lower plate, 4 High voltage winding, 5 Low pressure Side winding, 6 ... upper insulator, 7 ... upper channel structure, 8 ... lower channel structure, 9 ... lower insulator, 10, 20, 30, 30a, 30b ... magnetic shield, 10a, 20a ... center Magnetic shield, 10b, 10c, 10d, 20b ... end magnetic shield, 11 ... overhang structure, 12 ... magnetic shield body mounting structure, 12a ... upper iron core fastening bracket side support member, 12b ... overhang structure side support member, 12c ... Magnetic shield holding Over scan, 12d ... magnetic shielding sealing member 13 ... winding pressing member, 33 ... box-shaped lower core clamping bracket 35 ... oil flow passage, 37 ... oil introducing hole.

Claims (3)

An iron core composed of a core leg portion and a core yoke formed by laminating a plurality of silicon steel plates, a winding wound around the iron core leg portion, and an upper and lower sides of the winding to tighten the iron core comprising upper and lower core clamping bracket for fixing, and a magnetic shield disposed between said winding and each of said upper and lower core clamping bracket,
The axial distance between the upper core clamping bracket and the magnetic shield disposed in said upper portion, with being made size rather configured than the radial distance between the magnetic shield disposed in said upper and said core, each of said magnetic The shield is divided into three in the longitudinal direction of the upper and lower iron core clamps, the rolling direction of the silicon steel plate of the magnetic shield located in the center is perpendicular to the rolling direction of the silicon steel plate constituting the iron core, and both ends The rolling direction of the silicon steel plate of the magnetic shield located at a right angle is perpendicular to the rolling direction of the silicon steel plate of the magnetic shield located at the central portion, and the magnetic shield located at the central portion has a rectangular planar shape. The stationary induction machine is characterized in that the planar shape of the magnetic shield located at both ends is a trapezoid . The static induction machine according to claim 1 ,
The winding includes a low-voltage side winding wound around the iron core leg portion and a high-voltage side winding wound around the low-voltage side winding with a predetermined gap around the low-voltage side winding. The magnetic shield is disposed so as to cover a gap between the low-voltage side winding and the high-voltage side winding. The static induction machine according to claim 1 or 2 ,
Each of the magnetic shields divided into three and arranged on the upper part is housed in a holding case, and the iron core side of the holding case is connected to the upper iron core fastening bracket via the first support member. The stationary induction machine, wherein the iron core side is fixed to an overhang structure provided on the upper iron core fastening bracket via a second support member.

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