JP3192860B2 - Static induction device winding and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction device winding suitable for reducing the size and weight of a static induction device and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, power equipment has been increasingly installed in urban areas in response to an increase in power demand in urban areas. Among these types of power equipment, stationary induction equipment installed in buildings and underground malls, especially large equipment such as transformers, is required to have flame retardancy. For this reason, a conventional oil-filled transformer using flammable mineral oil is being replaced with a molded transformer in which a coil is molded with a flame-retardant epoxy resin or the like.

However, when a molded (cast) coil is employed, the cooling of the coil depends on air cooling from the outer surface of the coil, so that a liquid insulating and cooling medium such as an oil-immersed transformer is required. The cooling performance is significantly lower than that of cooling by convection circulation. For this reason, it is necessary to take measures such as lowering the current density of the winding,
There was a tendency to increase the weight. On the other hand, downsizing and weight reduction of transformers are top priorities due to the nature of installing transformers (stationary induction equipment) in places where land prices are high and import restrictions are severe in urban areas. There is a strong demand for improved cooling of equipment windings.

As a configuration for solving such a problem, the present applicant has previously filed Japanese Patent Application No. 5-207432. According to the present invention, the winding is formed by a non-loop type thin tube heat pipe to improve the cooling property of the winding. Hereinafter, this structure will be described with reference to FIGS.

[0005] First, as shown in FIG. 8, a winding body 2 is formed by a thin tube container 1 formed as a hollow tubular electrically insulated wire, and a working fluid is sealed inside the thin tube container 1 to thereby form a winding. The main body 2 is configured as a non-loop type thin tube heat pipe. And this winding body 2
Means that a plurality of disc-shaped winding units 3 are vertically
It is configured in a form stacked through. Further, a heat collecting portion 6 connected to a connection pipe (cooling pipe) 5 is sandwiched at a predetermined position between the layers of the disc-shaped winding unit 3 so as to also serve as a spacing piece. And the thin tube container 1 of the disc-shaped winding unit 3 are in close contact. An external heat exchanger and a circulation pump are connected to the remaining portion of the connection pipe 5. In the case of this configuration, the heat generated in the winding is transported to a portion (heat radiating portion) that is in close contact with the heat collecting portion 6 due to the axial vibration of the working fluid in the thin tube container 1, and the heat collecting portion 6 here. The heat is transferred to and collected. Then, the heat collected by the heat collecting unit 6 is transmitted to the refrigerant, and the refrigerant is forcedly circulated in the connection pipe 5 by being driven by the circulating pump, and is transported to the external heat exchanger. The heat is dissipated.

Further, as shown in FIG. 9, the heat collecting section 6 is formed of a metal plate-like member, and has a substantially U-shaped refrigerant passage 6a formed therein. Thereby, the heat collecting section 6 is configured to sufficiently contact the thin tube container 1 of the disc-shaped winding unit 3 of the winding main body 2. An insulating coating made of, for example, epoxy resin is applied to the surface of the heat collecting unit 6, and a connection pipe 5 is connected to both ends of the refrigerant flow path 6 a of the heat collecting unit 6 via a pipe connecting unit 7. Have been.

[0007]

When the winding having the above structure is molded with an epoxy resin or the like, a large number of connecting pipes 5 are pulled out of the casting mold, and the connecting pipes 5 are drawn into these drawn portions. Requires a seal to prevent resin leakage. For this reason, there is a problem that a lot of time is required for the mold assembly, and a possibility that a void defect occurs due to an air suction in the pressurizing step is increased. Furthermore, since a large number of connection pipes 5 are configured to penetrate the resin layer of the molded body, the possibility of deterioration in insulation due to separation of the boundary surface between the resin and the connection pipes 5 is considerably increased. In particular, in this case, when a conductive thin film is formed on the outer surface layer of the coil to form a grounded outer surface coil,
There is also a possibility that the boundary surface peeling may be a fatal defect.

Therefore, an object of the present invention is to improve the cooling performance by forming a winding main body with a non-loop type thin tube heat pipe, to reduce the size and weight of the entire structure, and to mold with a resin. It is an object of the present invention to provide a static induction device winding and a method for manufacturing the same, which can improve the manufacturability of the winding.

[0009]

SUMMARY OF THE INVENTION A stationary induction machine winding according to the present invention comprises a non-loop type thin tube heat pipe in which a working fluid is sealed inside a hollow tubular thin tube container, and is stacked in the axial direction. A winding main body having a plurality of disc-shaped winding units is provided, and is provided between the plurality of disc-shaped winding units so as to be in close contact with a heat radiating portion of the disc-shaped winding unit. A heat collecting member having a flat plate shape having a refrigerant flow path, and a mold insulating layer covering the winding body and the heat collecting member are provided. In this mold insulating layer, a refrigerant flow path of the heat collecting member and an external heat exchanger are provided. The present invention is characterized in that a communicating refrigerant flow path communicating with a connection pipe connected to is connected. In the case of this configuration, it is also preferable that the heat collecting member is formed of a ceramic having an insulating property and a high thermal conductivity or a resin mixed with a powder of the ceramic.

[0010] In the method of manufacturing a stationary induction device winding having the above-described configuration, a rod-shaped first core is fitted into a refrigerant inflow hole formed in the heat collecting member.
Accommodating the winding main body and the heat collecting member in which a second core having a rod shape is fitted in a coolant outflow hole formed in the heat collecting member in a casting mold; It is preferable that the method further includes a step of injecting the resin into the mold, and a step of opening the casting mold and removing the two cores after the injected resin is cured. In this case, the core may be formed of a silicone resin, a fluorine resin, a polyethylene resin, or the like, which has a higher thermal expansion coefficient than each of the heat collecting member and the casting resin and has low tackiness. preferable.

Further, as another manufacturing method for manufacturing the above-described stationary induction device winding, a step of molding the winding main body and the heat collecting member with a resin, and a step of forming a hole in the molded insulating layer. Forming a communicating refrigerant flow path that communicates with the refrigerant flow path of the heat collecting member.

[0012]

According to the above means, since the winding body is constituted by the non-loop type thin tube heat pipe, the heat generated in the winding body is transported to the heat radiating portion of the winding body (disk-shaped winding unit). Is done. Then, the heat transported to the radiator is transmitted to the refrigerant via a heat collecting member having high thermal conductivity, and the refrigerant is circulated in the connection pipe and transported to the external heat exchanger, where it is radiated to the outside. You. As a result, the cooling performance of the winding main body is improved, and the overall configuration of the winding can be reduced in size and weight. Further, since the communication refrigerant flow path is formed in the mold insulating layer itself, the interface between the resin of the mold insulating layer and the connection pipe does not peel off at all, so that the insulation property is deteriorated. Can be reliably prevented.

On the other hand, when manufacturing the above-mentioned winding, a first core having a rod shape is fitted into a refrigerant inflow hole formed in the heat collecting member, and a refrigerant outflow hole formed in the heat collecting member is formed. After the step of housing the winding body and the heat collecting member in the casting mold in a state where the second core having a rod shape is fitted, and injecting the resin into the casting mold. After the injected resin is cured, open the casting mold,
A step of removing two cores is performed. As a result, only two cores are pulled out of the casting mold, so that the number of sealing points can be reduced compared to the conventional configuration, the mold assembly becomes very simple, and void defects occur. The likelihood of doing so is greatly reduced. Therefore, the manufacturability when molding the winding body with resin can be greatly improved.

In this case, the core is formed of a silicone resin, a fluorine resin, a polyethylene resin, or the like, which has a thermal expansion coefficient larger than that of each of the heat collecting member and the casting resin and has low tackiness. Therefore, at the time of resin injection (at high temperature), the core expands and closely adheres to the hole of the heat collecting member, thereby preventing the resin from flowing into the coolant flow path. Since the core shrinks and is non-adhesive, the core can be easily pulled out (removed).

Further, as another manufacturing method, after performing a step of molding the winding body and the heat collecting member with a resin, a hole is formed in the molded insulating layer, so that the refrigerant flow of the heat collecting member is reduced. The step of forming a communicating refrigerant channel communicating with the path may be executed. With this configuration, the mold assembly is further facilitated, and the manufacturability can be further improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a transformer winding will be described below with reference to FIGS. Note that a transformer is usually composed of two windings, a low-voltage winding and a high-voltage winding, but in the following description, only one winding will be described, and the other winding will be described and illustrated. I omit it.

First, in FIG. 4 showing the overall schematic configuration of a disk-shaped winding before being molded with resin, a winding main body 1 is shown.
1 is formed by winding a thin tube container 12 formed as a hollow annular electrically insulated conductor in a disk shape, and stacking a plurality of the disk-shaped winding units 13 in the vertical direction. It is constituted by winding continuously to the winding end. The thin tube container 12 is formed of a hollow annular conductor having low electric resistance and high thermal conductivity such as copper or aluminum, and is provided with an insulating layer having a predetermined thickness on an outer peripheral surface thereof. Here, the insulating layer is preferably formed from a material having high thermal conductivity. The working fluid is sealed in the thin tube container 12 from the winding start end or the winding end end, whereby the winding body 11 is configured as a non-loop type thin tube heat pipe. As the working fluid, for example, pure water or a fluorine-based liquid is used.

Further, the winding body 11 is formed in a form in which a plurality of disc-shaped winding units 13 are vertically stacked with spacing pieces 14 interposed therebetween. The spacing pieces 14 are provided for providing a predetermined gap between the disc-shaped winding units 13 to insulate them. In addition, each disc-shaped winding unit 13
It is configured by winding several turns (for example, seven turns) from the innermost to the outermost. Then, the disc-shaped winding unit 13
A heat collecting member 17 communicated with a connection pipe 16 (see FIGS. 2 and 3) is sandwiched between the heat radiating portions 15, which are predetermined portions between the layers, so that the heat collecting members 17 also serve as some of the spacing pieces. in this case,
The heat collecting member 17 is configured to be closely adhered to the thin tube container 12 of the disc-shaped winding unit 13 via a sheet (not shown) having an insulating property and a high thermal conductivity. The above sheet is made of BN (boron nitride) or ALN
It is composed of a ceramic powder such as (aluminum nitride) or the like which is solidified in a sheet shape with a rubber material. An external heat exchanger and a circulation pump (both not shown) are provided at the other end of the connection pipe 16.

Here, as shown in FIG. 5, the heat collecting member 17 is made of a metal (for example, copper, aluminum or non-magnetic stainless steel) plate-like member, and has a substantially U-shaped inside. A hollow tubular refrigerant passage 17a is formed.
Thereby, the heat collecting member 17 has a shape having a sufficient contact area with the thin tube container 12 of the disc-shaped winding unit 13 of the winding main body 11. The surface of the heat collecting member 17 is coated with an insulating coating made of, for example, an epoxy resin or the like as required for insulation. This allows
The heat collecting member 17 has insulating properties and high thermal conductivity. At the right end in FIG. 5 of the heat collecting member 17, two through holes 17b and 17c are formed so as to communicate with both ends of the refrigerant flow path 17a. It serves as an inflow hole, and the other through hole 17c serves as a refrigerant outflow hole. The heat collecting member 17 and the thin tube container 12
A grease or resin having good thermal conductivity may be applied to the joint surface between the two to reduce the heat transfer resistance of both.

The winding main body 11 and the heat collecting member 17 configured as described above are formed by a molding method (manufacturing method) described later in detail, as shown in FIGS.
Molded with resin such as epoxy resin. In this case, a communication refrigerant flow path 19 is formed in the molded insulating layer 18 formed by resin molding so as to cover the winding body 11 so as to connect the refrigerant flow path 17 a of the heat collecting member 17 and the connection pipe 16. ing. The communicating refrigerant flow path 19 is composed of a refrigerant inflow passage 20 and a refrigerant outflow passage 21. In this case, as shown in FIGS. 1 and 2, the refrigerant inflow passage 20 extends along the axial direction (vertical direction in the drawing) of the winding main body 11 and passes through the refrigerant inflow hole 17 b of the heat collecting member 17. The lower end is open to the lower surface of the mold insulating layer 18 (the upper end is closed in the mold insulating layer 18). The refrigerant outlet side end 16a of the connection pipe 16 is connected to the lower end opening 20a of the refrigerant inflow passage 20.

Similarly, as shown in FIGS. 1 and 3, the refrigerant outflow passage 21 extends along the axial direction (vertical direction in the figure) of the winding main body 11 and the refrigerant outflow hole 17 of the heat collecting member 17.
c is formed so as to penetrate through the inside, and the upper end is opened at the upper surface of the mold insulating layer 18 (the lower end is closed in the mold insulating layer 18). The refrigerant return end 16 b of the connection pipe 16 is connected to the upper end opening 21 a of the refrigerant outflow passage 21. The connection pipe 1
Reference numeral 6 is made of an insulating material, for example, a resin such as Teflon or vinylidene chloride, and has an insulating refrigerant sealed therein. As the refrigerant, for example, pure water, fluorine-based liquid, or the like is used. In this case, the entire connection pipe 16 does not need to be formed of an insulating material, and at least a portion connected to the upper end opening 21a and the lower end opening 20a of the mold insulating layer 18 may be formed of an insulating material. .

In the case of this configuration, the heat generated in the winding main body 11 is transported to the heat radiating portion 15 by the axial vibration of the working fluid in the thin tube container 11, and is transmitted to the heat collecting member 17 where the heat is collected. It is. Then, the heat collected by the heat collecting member 17 is transmitted to the refrigerant in the refrigerant flow path 17a, and further, by driving the circulation pump, the refrigerant is forcibly circulated in the connection pipe 16 and external heat exchange is performed. Transported to a vessel where it is radiated to the outside. Thereby, the winding body 1
1 is cooled efficiently.

Next, a method of manufacturing the molded winding having the above-described structure, particularly, a method of molding the winding body 11 and the heat collecting member 17 with resin will be described with reference to FIGS. First, as shown in FIG. 4 and as described above, the winding body 11 is constituted by the thin-tube container 12 (non-loop type thin-tube heat pipe), and the disk-shaped winding unit 13 (radiator of the winding body 11) is formed. 15) Heat collecting member 1 between
7 is inserted and fitted. Then, in the assembled state up to this point, as shown in FIG. 6, the first core 22 having a round bar shape is inserted into the refrigerant inflow hole 17 b of the heat collecting member 17 and fitted therein, and the round bar shape is similarly formed. A step is performed in which the second core 23 to be formed penetrates and fits into the refrigerant outflow hole 17 c of the heat collecting member 17. Here, the first and second cores 22, 23 are used.
Is formed of a silicone resin, a fluorine resin, a polyethylene resin, or the like, which has a higher thermal expansion coefficient than each of the heat collecting member 17 and the casting resin and has low tackiness.

Subsequently, a step of accommodating the first and second cores 22 and 23 by fitting and mounting the winding body 11 and the heat collecting member 17 in the casting mold 24 is performed. In this case, the casting mold 24 has an inner peripheral mold 25 fitted to the inner peripheral portion of the winding main body 11 via a predetermined gap, and an inner peripheral mold 25 fitted to the outer peripheral portion of the winding main body 11 via a predetermined gap. And an upper end mold 27 that covers the upper end of the winding body 11 with a predetermined gap, and a lower end mold that covers the lower end of the winding body 11 with a predetermined gap. 28 are assembled as shown in FIG. The lower end of the first core 22 is assembled so as to penetrate the lower end mold 28 and protrude to the outside.
Similarly, the upper end of the second core 23 is molded so as to penetrate the upper end mold 27 and protrude to the outside. In addition, in each penetration part (two places) of the above-mentioned two cores 22 and 23,
A seal is provided to prevent resin leakage.

After the winding main body 11 and the heat collecting member 17 are accommodated in the casting mold 24 as described above, a step of injecting resin into the casting mold 24 is performed. After this,
When the injected resin is cured, a step of opening the casting mold 24 and pulling out and removing the two cores 22 and 23 is executed. In this way, a winding formed by molding as shown in FIGS. 1 to 3 is manufactured.

According to the present embodiment having such a configuration, when the winding main body 11 is formed, the thin tube container 12 constituting the non-loop type thin tube heat pipe is used. It is not necessary to form a loop in the capillary tube container 12,
Also, since it is not necessary to draw out the conductor from the middle of the winding to form the heat radiating portion, and further, it is not necessary to attach a valve body, and the winding can be easily formed without any difference from the conventional winding process. In addition, an optimum configuration can be obtained in terms of insulation.

In the thin-tube container 12 constituting the non-loop-type thin-tube heat pipe, it is necessary to disperse the heat-radiating portions appropriately. A predetermined position between the layers of the disc-shaped winding unit 13 forming a pair, that is,
Since the heat collecting member 17 communicating with 6 is placed in close contact with the heat collecting member 17, the heat radiating portion 15 is provided for each turn, and the heat radiating portion 15 can be distributed. For this reason, since the winding main body 11 operates effectively as a non-loop type thin tube heat pipe, it is possible to make the internal temperature distribution of the winding main body 11 uniform.

In the above configuration, the heat generated in the winding main body 11 by energization is first caused by the operation of the non-loop type thin tube heat pipe, that is, the axial vibration of the working fluid sealed in the thin tube container 12. Is transported to the heat radiating portion 15 which is a heat radiating portion of the non-loop type thin tube heat pipe, where it is transmitted to the heat collecting member 17 and collected. Then, the heat collected by the heat collecting member 17 is transmitted to the refrigerant in the refrigerant flow path 17a, and the refrigerant is forced to circulate by the circulating pump so that the refrigerant flows out of the refrigerant outflow passage 2 of the mold insulating layer 18.
1 and the connection pipe 16 to the external heat exchanger, where the heat is released to the outside. The refrigerant cooled by the external heat exchanger is supplied to the connection pipe 16 and the refrigerant inflow passage 20.
And flows into the refrigerant passage 17a of the heat collecting member 17 to circulate.

In the case of this configuration, the heat collecting member 17 is made of metal and has a shape having a sufficient contact area with the thin tube container 12 of the winding body 11, specifically, a flat plate shape. Heat is easily transmitted from the heat radiating portion 15 of the wire main body 11 to the heat collecting member 17, and the cooling efficiency of the winding main body 11 can be greatly improved. Even if the heat collecting member 17 is made of metal, the heat collecting member 17 is insulated with respect to the ground potential.
Sufficient insulation performance can be obtained only by applying an insulation coating of a predetermined thickness on the surface of 7 or by interposing a sheet having insulation and high thermal conductivity.

Further, in the above embodiment, the metal heat collecting member 17 is configured to be in an electrically floating state. In this case, two disk-shaped winding units 13 sandwiching the heat collecting member 17 are provided.
Between the two disc-shaped winding units 13
Therefore, stable insulation performance can be maintained even in a transient state. Furthermore, even if the heat collecting member 17 is made of metal, the heat collecting member 17 is made of a high magnetic field in the winding body 11 by using copper or aluminum having low electric resistance and a large demagnetizing effect, or non-magnetic stainless steel. , The eddy current loss generated in the heat collecting member 17 can be minimized.

On the other hand, when manufacturing the molded winding of the present embodiment, as shown in FIG. 6, a first core 22 having a rod shape is fitted into a refrigerant inflow hole 17b formed in the heat collecting member 17. At the same time, after the rod-shaped second core 23 is fitted into the refrigerant outflow hole 17c formed in the heat collecting member 17, the winding main body 11 is housed in the casting mold 24, and The resin was injected into the casting mold 24. As a result, only one end of each of the two cores 22 and 23 is pulled out from the casting mold 24.
), The number of seal locations can be greatly reduced, the mold assembly becomes very simple, and the possibility of void defects due to air suction in the pressurizing step is also greatly reduced.
In addition, since the coolant inflow passage 20 and the coolant outflow passage 21 are formed as the communication coolant passage 19 in the mold insulation layer 18 itself, the boundary surface between the resin of the mold insulation layer and the connection pipe may be separated. Since there is none, it is possible to prevent the insulation from being deteriorated. Therefore, the productivity in molding the winding with resin can be generally improved.

In this case, the cores 22 and 23 are connected to the heat collecting member 1.
7 and a resin having a higher coefficient of thermal expansion than the respective coefficients of thermal expansion of the casting resin, and a low tackiness resin such as a silicone resin, a fluorine resin or a polyethylene resin. At the time of injection (at high temperature), the cores 22 and 23 expand and the holes 17 b and 17
c, the resin is prevented from flowing into the coolant flow path 17a. On the other hand, after the resin is cured (at low temperature), the core 22,
Since core 23 shrinks and is non-sticky, core 2
2 and 23 can be easily removed (removed) from the mold insulating layer 18. This eliminates the need to seal between the cores 22 and 23 and the holes 17b and 17c of the heat collecting member 17, and eliminates the need to provide an extraction taper in the cores 22 and 23, thereby further improving manufacturability. be able to.

In the above embodiment, insulating coating is applied to both upper and lower surfaces of the heat collecting member 17, and a sheet having high insulating property and high thermal conductivity is attached. Although it is configured to be sandwiched, the configuration may be such that only an insulating coating is applied or a sheet is simply attached. In the above embodiment,
The heat collecting member 17 was formed of metal, but instead of this,
Ceramics having insulating properties and high thermal conductivity (for example, BN
(Boron nitride), ALN (aluminum nitride), etc.)
It may be formed by a resin (for example, a heat-resistant rubber made of silicone rubber or the like) mixed with the ceramic powder. With this configuration, insulation reliability when applied to a high-voltage winding can be further improved.

FIG. 7 shows a second embodiment of the present invention, and different points from the first embodiment will be described.
In the second embodiment, the communication refrigerant flow path 19 is formed in the mold insulating layer 18 without using the cores 22 and 23. Specifically, first, instead of the heat collecting member 17, a heat collecting member 29 as shown in FIG. Make up the body. The heat collecting member 29 is, similarly to the heat collecting member 17, formed of a metal plate-like member, and has a substantially U-shaped hollow tubular refrigerant flow passage 29a formed therein. The heat collecting member 29 is not formed with holes corresponding to the refrigerant inflow hole 17b and the refrigerant outflow hole 17c of the heat collection member 17.

In the second embodiment, when performing the step of molding the winding body with resin, the winding body and the heat collecting member are housed in the casting mold without using the core. Then, in the housed state, a resin is injected into the casting mold and the winding body is molded with the resin. Thereafter, when the resin is cured, the mold is opened and the molded winding is taken out. Then, as shown in FIGS. 1 to 3, by forming a hole in the mold insulating layer of the molded winding, a refrigerant inflow passage 20 is formed as a communication refrigerant passage 19 communicating with the refrigerant passage 29 a of the heat collecting member 29. And a refrigerant outflow passage 21. Therefore, also in the second embodiment,
It is possible to obtain substantially the same operation and effect as in the first embodiment. In particular, in the second embodiment, since the core for the communication refrigerant flow path 19 is not used, the number of sealing portions is reduced accordingly, and the mold assembly of the casting mold is further simplified.

[0036]

According to the present invention, as is apparent from the above description, the winding body is constituted by a non-loop type thin tube heat pipe, and the winding body and the heat collecting member are molded with resin. Since the communicating refrigerant flow path is provided in the insulating layer so that the refrigerant flow path of the heat collecting member and the connection pipe communicate with each other, the cooling performance of the winding body can be improved, and the overall configuration can be downsized. In addition, the present invention has an excellent effect that the weight can be reduced and the insulation property can be reliably prevented from being deteriorated. Also, when molding the winding body and heat collecting member, only two cores are pulled out from the casting mold, so that the number of sealing points can be significantly reduced as compared with the conventional configuration. In addition, the mold assembling becomes very simple, and the possibility of the occurrence of void defects due to air suction during the pressurizing step is greatly reduced, so that the manufacturability can be greatly improved.

Further, the core is made of a silicone resin, a fluorine resin, a polyethylene resin, or the like, which has a coefficient of thermal expansion larger than that of each of the heat collecting member and the casting resin and has low tackiness. When the resin is injected (at high temperature), the core expands and comes into close contact with the hole of the heat collecting member, thereby preventing the resin from flowing into the coolant flow path. On the other hand, after the resin is cured (at low temperature), Since the core shrinks and is non-tacky, the core can be easily pulled out.

Further, as another manufacturing method, a step of molding the winding body and the heat collecting member with resin is performed, and then a hole is formed in the molded insulating layer, so that the refrigerant flow of the heat collecting member is reduced. Since the molded winding is manufactured by performing the step of forming the communicating refrigerant flow path communicating with the path, the mold assembly is further facilitated, and the productivity can be further improved.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a mold winding showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cutaway perspective view of a winding body before molding.

FIG. 5 is a perspective view of a heat collecting member.

FIG. 6 is a cutaway perspective view showing a state where the winding body is housed in a casting mold.

FIG. 7 is a view corresponding to FIG. 5, showing a second embodiment of the present invention.

FIG. 8 is a diagram corresponding to FIG. 4, showing a conventional configuration.

FIG. 9 is a diagram corresponding to FIG. 5;

[Explanation of symbols]

11 is a winding main body, 12 is a thin tube container, 13 is a disc-shaped winding unit, 15 is a heat radiating section, 16 is a connection pipe, 17 is a heat collecting member, 17a is a refrigerant flow path, 17b is a refrigerant inflow hole,
17c is a refrigerant outflow hole, 18 is a mold insulating layer, 19 is a communicating refrigerant flow path, 20 is a refrigerant inflow path, 21 is a refrigerant outflow path, 22 is a first core, 23 is a second core, 24 is A casting mold, 29 indicates a heat collecting member, and 29a indicates a refrigerant flow path.

Continuation of the front page (56) References JP-A-64-84699 (JP, A) JP-A-3-286510 (JP, A) JP-A-57-143813 (JP, A) Jpn. , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01F 27 / 08,27 / 28,30 / 00 H01F 30 / 12,41 / 04,41 / 12

Claims (5)

(57) [Claims] 1. A winding comprising a non-loop type thin tube heat pipe in which a working fluid is sealed inside a hollow tubular thin tube container, and having a plurality of disk-shaped winding units stacked in the axial direction. A main body, a plate-shaped heat collecting member provided between the plurality of disc-shaped winding units so as to be in close contact with a heat radiating portion of the disc-shaped winding unit, and having a refrigerant passage therein; A mold insulating layer covering the wire main body and the heat collecting member, and a communicating refrigerant provided on the mold insulating layer so as to communicate a refrigerant flow path of the heat collecting member with a connection pipe connected to an external heat exchanger. A static induction device winding comprising a flow path; 2. The stationary induction machine winding according to claim 1, wherein the heat collecting member is formed of a ceramic having an insulating property and a high thermal conductivity or a resin mixed with a powder of the ceramic. 3. The manufacturing method for manufacturing a winding of a stationary induction device according to claim 1, wherein a first core having a rod shape is fitted into a refrigerant inflow hole formed in the heat collecting member, and A step of housing a winding body and a heat collecting member in which a second core having a rod shape is fitted in a refrigerant outflow hole formed in the heat collecting member, in a casting mold; A stationary guiding apparatus, comprising: a step of injecting a resin into the mold; and, after the injected resin is cured, a step of opening the casting mold and removing the two cores. Manufacturing method of winding. 4. The core is formed of a silicone resin, a fluororesin, a polyethylene resin, or the like, which has a coefficient of thermal expansion larger than each coefficient of thermal expansion of the heat collecting member and the casting resin and has low tackiness. Claim 3 characterized by the following:
A method for manufacturing the static induction device winding according to the above. 5. The method for manufacturing a winding of a stationary induction machine according to claim 1, wherein the winding main body and the heat collecting member are molded with a resin, and a hole is formed in the molded insulating layer. Forming a communicating refrigerant flow path communicating with the refrigerant flow path of the heat collecting member.