JP3069011B2 - Static induction device winding and method of manufacturing the same - 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 such as a transformer, 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, flame-retardant properties are required for stationary induction equipment installed in buildings and underground malls, especially for large equipment such as transformers. For this reason, conventional oil-immersed transformers using flammable mineral oil are being replaced with mold transformers whose windings are molded (injected) with a flame-retardant epoxy resin or the like.

However, when a mold winding is employed, cooling of the winding depends on air cooling from the outer surface of the mold insulating layer. Convection cooling and cooling,
Coolability is significantly reduced. For this reason, it is necessary to take measures such as lowering the current density of the windings, which tends to increase the size of the device and 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, there has been proposed a configuration in which a winding is formed by a non-loop type thin tube heat pipe to improve the cooling performance of the winding. This will be described with reference to FIGS.

First, as shown in FIG. 11, a winding container 2 is formed by a thin tube container 1 formed as a hollow tubular electrically insulated wire.
And the working fluid is sealed in the thin tube container 1 so that the winding body 2 is formed as a non-loop type thin 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 member 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 refrigerant 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 transferred to the heat collecting member 6 by the axial vibration of the working fluid in the thin tube container 1.
Is transported to a portion (heat radiating portion) that is in close contact with the heat collector, and is transferred to the heat collecting member 6 where heat is collected. Then, the heat collected by the heat collecting member 6 is transmitted to the refrigerant, and the refrigerant is forcedly circulated in the connection pipe 5 by being driven by the circulation pump, and is transported to the external heat exchanger, where it is discharged to the outside. The heat is dissipated.

Further, as shown in FIG. 12, the heat collecting member 6 is formed of a metal plate-like member, and has a substantially U-shaped refrigerant passage 6a formed therein. This allows
The heat collecting member 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 member 6, and connection pipes 5 are provided at both ends of the refrigerant flow path 6 a of the heat collecting member 6 via the pipe connection portions 7. It is connected.

[0008]

When the winding body 2 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 these are connected. It is necessary to apply a seal for preventing resin leakage from the drawn-out portion. For this reason, there is a problem that a lot of time is required for the mold assembly, and there is a problem that air is sucked from a sealing portion for preventing resin leakage at the time of resin molding and a possibility that a void defect is generated in the mold insulating layer is increased. Further, since a large number of connection pipes 5 are configured to penetrate the mold insulating layer, the possibility of deterioration of insulation due to separation of the interface between the resin and the connection pipes 5 is considerably increased. In particular, in the case where a conductive thin film is formed on the outer surface of the mold insulating layer to form a grounded outer surface winding, the above-described boundary surface peeling may be a fatal defect.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the cooling performance by forming a winding main body with a non-loop-type thin heat pipe, thereby making it possible to reduce the size and weight of the whole structure, as well as to achieve insulation. 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 reliability and the manufacturability in molding by molding with resin.

[0010]

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 in a hollow tubular thin tube container. A winding body having a plurality of disc-shaped winding units stacked in the axial direction, and a plurality of disc-shaped winding units are 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 plurality of flat heat collecting members having a refrigerant flow path, a mold insulating layer covering the winding body and the heat collecting member, and a connection connected to the refrigerant flow path of the heat collecting member and the external heat exchanger. A plurality of heat collecting members, each formed of an insulating resin, and connected along the axial direction of the winding body so that the internal refrigerant flow paths communicate with each other. I do.

In this case, it is preferable that the heat collecting member is formed to have a smaller thickness at a portion in contact with the disc-shaped winding unit than at other portions. The heat collecting member is preferably formed of a resin containing a filler such as silica, and has a linear expansion coefficient substantially equal to that of the mold insulating layer covering the winding body and the heat collecting member.

Further, the heat collecting member is preferably formed of a resin mixed with a ceramic powder having a high thermal conductivity such as boron nitride as a filler, and preferably has a high thermal conductivity. Further, in the method for manufacturing the static induction device winding having the above configuration, a step of housing the winding body and the heat collecting member in a casting mold, and a step of injecting a resin into the casting mold. Opening the casting mold after the injected resin is cured, wherein the plurality of heat collecting members are connected to each other through the communicating portions of the refrigerant flow paths. Store in the mold. In this case, if a seal connecting member made of a rubber-like elastic body is used for interconnecting the refrigerant channels of the heat collecting members, the mold assembly is further facilitated.

[0013]

According to the above means, since the winding body is constituted by a non-loop type thin tube heat pipe, the heat generated by the winding is dissipated by the heat radiating portion of the winding body (disk-shaped winding unit). Transported to Then, the heat transported to the heat radiating portion is transmitted to the refrigerant through the heat collecting member, and the refrigerant is transported to the external heat exchanger through the inside of the connection pipe, where the heat is radiated to the outside. 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.

Here, since the heat collecting member is formed of an insulating resin, the heat collecting member does not generate heat due to the magnetic flux even if it is arranged in the winding. In addition, since the refrigerant circulating in the heat collecting member is also an insulating liquid, an insulating layer such as an insulating coating for maintaining insulation from the winding is not required, and a portion of the portion that contacts the disk-shaped winding unit is not required. If the thickness of the heat collecting member is reduced, the thermal resistance of the heat collecting portion can be suppressed to a small level.

In the case of a high-voltage winding, if a crack or a peeling defect exists in a high electric field portion such as between the disk-shaped winding units, partial discharge may occur and dielectric breakdown may occur after long-term operation. The heat collecting member of the winding of the stationary induction device according to the present invention is a contact point between the winding and the refrigerant, where a large temperature difference occurs, and cracks and peeling defects easily occur due to thermal stress caused by a difference in linear expansion coefficient of the used member. However, the heat collecting member is formed of an insulating resin containing a filler such as silica, and has a linear expansion coefficient substantially equal to that of the mold insulating layer covering the winding body and the heat collecting member. There is no possibility that cracks or peeling defects occur due to stress. Furthermore, the heat collecting member,
Forming a resin blended with a high thermal conductive ceramic powder such as boron nitride as a filler not only can reduce thermal stress, but also has a high thermal conductivity, so the thermal resistance of the heat collecting member can be further reduced. Can be.

On the other hand, according to the manufacturing method of the present invention, since the refrigerant flow paths of the heat collecting members are connected to each other in advance, the refrigerant drawn out of the casting mold to the outside only needs one refrigerant at a time. Only the flow path is provided. Therefore, as compared with the conventional configuration, the number of seal portions for preventing resin leakage can be reduced, the mold assembly can be simplified, and the possibility of occurrence of void defects can be greatly reduced.

Further, if a seal connecting member made of a rubber-like elastic material is used for interconnecting the refrigerant flow paths of the heat collecting members, not only the adhesion becomes unnecessary but also the manufacturing error can be absorbed by the elasticity. Therefore, the close contact between the heat collecting member and the disk-shaped winding unit can be maintained. Therefore, it is possible to greatly improve the manufacturability when the winding body is molded with resin, and to provide a static induction device winding excellent in cooling performance with a small thermal resistance between the winding and the heat collecting member. Obtainable.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An 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 molding with resin, a winding main body 1 is shown.
1 is formed by winding a thin tube container 12 formed as a hollow tubular electrically insulated wire 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 made of a hollow tubular conductor having low electrical 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. An insulating working fluid is sealed in the thin tube container 12 from the winding start end or the winding end end, so that the winding body 11 is configured as a non-loop type thin tube heat pipe. Have been. As the working fluid, for example, pure water or fluorine-based liquid is used.

The winding body 11 is formed in a form in which a plurality of disk-shaped winding units 13 are stacked vertically with a spacing piece 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, 7 turns) from the innermost to the outermost. Then, the disc-shaped winding unit 13
A heat collecting member 17 communicated with a connecting pipe 16 (see FIGS. 2 and 3)
Is sandwiched so as to serve also as a part of the spacing piece. 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 formed by laminating two plate members 171 made of an insulating resin (for example, epoxy resin). As shown in FIG. 6, the plate-like member 171 has a substantially U-shaped refrigerant flow path 17a formed on one side of a flat plate, and a through-hole 17 serving as an entrance and exit of the refrigerant flow path 17a.
Refrigerant flow path forming pipes 17d and 17e extending in a direction penetrating the flat plate are formed so as to surround the b and 17c. By bonding two plate-like members 171 to each other, a substantially U-shaped refrigerant is formed therein. A channel 17a is formed, and communicates with the refrigerant channel 17a.
One upper and lower refrigerant flow path forming pipes 17d and 17e form a refrigerant inflow path 20, and the other upper and lower refrigerant flow path forming pipes 17e and 17d form a refrigerant outflow path 21. As a result, the heat collecting member 17 is configured such that the flat plate portion comes into contact with the thin tube container 12 of the disc-shaped winding unit 13 of the winding main body 2 with a sufficient contact area, and heat is conducted. In this case, grease or resin having good heat conductivity may be applied to the joint surface between the heat collecting member 17 and the thin tube container 12 so as to reduce the contact thermal resistance between them.

The plate-like member 1 constituting the heat collecting member 17
As shown in FIG. 7, if the thickness t of the portion abutting on the disc-shaped winding unit 13 is configured to be sufficiently smaller than the thickness T of the other portions as shown in FIG. The heat conduction is excellent, and the thickness T of the other portions is larger than that.
This has the effect of facilitating the bonding of 71.

The winding main body 11 and the heat collecting member 17 configured as described above are molded by a resin such as an epoxy resin as shown in FIGS. It is molded and covered with the mold insulating layer 18. A plurality of heat collecting members 17 are respectively formed on the mold insulating layer 18 by the upper and lower refrigerant flow path forming pipes 1.
7d, 17e or the winding body 1 via 17e, 17d
1 are connected along the axial direction (vertical direction in the figure), so that the refrigerant pipe 17a formed inside the plurality of heat collecting members 17 and the connection pipe 16 connected to the external heat exchanger Is formed. The refrigerant flow path 19 includes a refrigerant inflow path 20 and a refrigerant outflow path 21. As shown in FIGS. 1 and 2, the refrigerant inflow passage 20 extends along the axial direction of the winding body 11,
The heat collecting member 17 is formed so as to penetrate through the coolant inflow through hole 17b. The lowermost end is opened to the lower surface of the mold insulating layer 18, and the uppermost end is formed in the mold insulating layer 18. It is closed. The lower end opening 20 of the refrigerant inflow passage 20
The refrigerant delivery side end 16a of the connection pipe 16 is connected to a.

Similarly, the refrigerant outflow passage 21 extends along the axial direction of the winding main body 11 and through the refrigerant outflow through hole 17c of the heat collecting member 17, as shown in FIGS. And the uppermost end is the mold insulating layer 1.
8, and the lowermost end is closed in the mold insulating layer 18. The refrigerant return side end 16b of the connection pipe 16 is connected to the upper end opening 21a of the refrigerant outflow channel 21.

The connection pipe 16 is made of an insulating material, for example, a resin such as Teflon (trade name) or cross-linked polyethylene, and has an insulating refrigerant sealed therein. As the refrigerant, for example, pure water, a fluorine-based liquid, or the like is used. In this case, the connection pipe 16 does not need to be entirely made of an insulating material, and at least
Upper opening 21a and lower opening 20 of field insulating layer 18
The portion connected to a may be simply made of an insulating material. When a conductive thin film is formed on the outer surface of the mold insulating layer to form a grounded outer surface winding, the connection pipe 16 may be entirely made of metal (ground potential).

In the above 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 12, where it 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 channel 17a, and further,
By driving the circulation pump, the refrigerant is forcibly circulated in the connection pipe 16 and transported to the external heat exchanger, where the refrigerant is radiated to the outside. Thereby, the winding body 11 is efficiently cooled.

Next, a method for manufacturing the molded winding having the above structure, particularly, a method for molding the winding body 11 and the heat collecting member 17 with resin will be described with reference to FIGS. I do. 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 heat pipe), and the disk-shaped winding unit 13 ( The heat collecting member 17 is inserted and fitted between the heat radiating portions 15). Here, the refrigerant flow path forming pipes 17d and 17e of the heat collecting member 17 are cut in advance to an appropriate length, and when the heat collecting members 17 are inserted and fitted, the tips facing vertically are bonded to each other. 17f, 17g by bonding with adhesive
And a step of forming a refrigerant flow path along the axial direction of the winding body 11 is performed. A refrigerant flow path forming pipe 17d above the uppermost heat collecting member 17 constituting the refrigerant inflow path 20
Is bonded and sealed with a sealing lid 17h.
The refrigerant flow path forming pipe 17e at the lower part of the lowermost heat collecting member 17 which constitutes 1 is bonded and sealed with a sealing lid 17i.

Subsequently, as shown in FIG. 8, a step of housing 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 and a mold. Then, the lower end of the refrigerant flow path forming pipe 17d of the heat collecting member 17 constituting the refrigerant inflow path 20 is molded so as to penetrate the lower end mold 28 and protrude to the outside. Similarly, the upper end of the refrigerant flow path forming pipe 17e of the heat collecting member 17 forming the refrigerant outflow path 21 is formed so as to penetrate the upper end mold 27 and protrude to the outside. In addition, in each penetration part (two places) of said two pipes 17d and 17e,
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, for example, epoxy resin into the casting mold 24 is performed. Thereafter, when the injected resin is cured, a step of opening the casting mold 24 is performed. As a result, a mold-formed winding as shown in FIGS. 1 to 3 is manufactured.

According to the present embodiment having such a configuration, when forming the winding body 11, a non-loop type thin tube heat sink is used.
Since the thin tube container 12 constituting the top pipe is used, the winding operation can be performed in the same manner as a normal winding conductor, and there is no need to form a loop in the thin 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 furthermore, 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.

Further, 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 connecting pipe 1 is provided at a predetermined location between the layers of the disc-shaped winding unit 13 forming a pair of the wire main body 11, that is, at the heat radiating portion 15.
Since the heat collecting members 17 communicating with 6 are placed in close contact with each other, the heat radiating portions 15 are provided for each turn, and the heat radiating portions 15 can be dispersedly arranged. For this reason, since the winding main body 11 operates effectively as a non-loop type thin heat pipe, the internal temperature distribution of the winding main body 11 can be made uniform.

In the above configuration, the heat generated in the winding main body 11 by energization firstly acts on the non-loop type thin heat pipe, that is, the shaft of the working fluid sealed in the thin tube container 12. Due to the directional vibration, the heat is transferred 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. Heat collecting member 1
The heat collected to the refrigerant 7 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 outflow path 21 of the mold insulating layer 18 and the connection pipe 16 To the external heat exchanger, where it is released to the outside. The refrigerant cooled by the external heat exchanger flows through the connection pipe 16 and the refrigerant inflow path 20 into the refrigerant flow path 17a of the heat collecting member 17 and circulates.

In the case of this configuration, the heat collecting member 17 is formed in a shape having a sufficient contact area with the thin tube container 12 of the winding main body 11, specifically, in a flat plate shape.
The heat is easily transmitted from the heat radiating portion 15 to the heat collecting member 17,
The cooling efficiency of the winding body 11 can be greatly improved.

Since the heat collecting member 17 is formed of an insulating resin, the heat collecting member 17 is formed by magnetic flux even if it is disposed in the winding.
Does not generate heat and, as a result, lowers the cooling efficiency of the winding body 11. Further, since the refrigerant circulating in the heat collecting member 17 is also an insulating liquid such as a fluorine-based liquid, an insulating layer for maintaining the insulation of the winding main body 11 from the thin tube container 12 is not required. Further, the disc-shaped winding unit 13
By forming the thickness t of the heat collecting member 17 at the portion in contact with the (small tube container 12) to be small, the thermal resistance of the heat collecting portion can be suppressed to a small level. Heat is easily transmitted to the heat member 17, and the cooling efficiency of the winding body 11 can be improved.

On the other hand, when manufacturing the mold winding of this embodiment, as shown in FIG. 8, the refrigerant passage forming pipes 17d and 17e of the heat collecting member 17 are bonded and connected to each other. After forming the refrigerant inflow channel 20 and the refrigerant outflow channel 21 along the axial direction of the winding 11, the winding main body 11 is moved to the casting mold 24.
Then, the resin was injected into the casting mold 24. As a result, since only one end of the upper and lower refrigerant flow path forming pipes is pulled out from the casting mold 24, compared with the conventional configuration (see FIG. 11), a system for preventing resin leakage is provided. The number of holes can be greatly reduced, the mold assembly becomes very simple, and the possibility of occurrence of void defects due to air suction during molding is greatly reduced.

In the case of a high-voltage winding, if cracks or peeling defects exist between the disk-shaped winding units or in a high electric field portion such as a refrigerant flow path, partial discharge occurs and dielectric breakdown occurs after long-term operation. Sometimes. The insertion part of the heat collecting member 17 and the refrigerant flow path 19 part of the present configuration are the contact points between the windings and the refrigerant, and a large temperature difference is generated. The heat collecting member 17 is formed of a resin mixed with a filler such as silica, similarly to the mold insulating layer 18, and may be generated. Since it has a linear expansion coefficient substantially equal to that of the mold insulating layer 18 covering the path forming pipes 17d and 17e, it is possible to eliminate the possibility of cracks and peeling defects due to thermal stress. Therefore, it is possible to generally improve the manufacturability when molding the winding with the resin, and it is possible to obtain a static induction machine winding excellent in insulation reliability.

In the above embodiment, the heat collecting member 17 is formed of a resin containing a filler such as silica, but instead of silica, BN (boron nitride) or ALN (aluminum nitride) is used.
If it is formed of a resin blended with a high thermal conductive ceramic powder as a filler, not only can thermal stress be reduced, but also because of its high thermal conductivity, the thermal resistance of the heat collecting section can be suppressed to a lower level, Further, the cooling efficiency can be improved.

In the above embodiment, the bonding means is used for interconnecting the refrigerant flow forming pipes 17d and 17e of each heat collecting member 17, but instead of bonding, a rubber as shown in FIGS. 9 and 10 is used. By using a seal connecting member 17j made of an elastic body, a fitting connection is made as shown in FIG.
Adhesion is not required, and mold assembly becomes easy. Also, when the bonding means is used, if the coolant flow path forming pipes 17d and 17e cut in advance are too long, they will be stretched by the pipe portions, and the heat collecting member 17 and the disc-shaped winding unit 13 will be in close contact. Without this, the thermal resistance of the heat collecting part may increase. However, if the seal connecting member 17j made of a rubber-like elastic body is used, a manufacturing error can be absorbed by its elasticity.
Since the heat collecting member 17 and the disc-shaped winding unit 13 can be closely contacted with each other without being stretched by the pipe portion, a static induction device winding having a small heat resistance of the heat collecting portion and excellent cooling efficiency can be obtained.

[0039]

According to the present invention, as is apparent from the above description,
The winding body is composed of a non-loop type thin tube heat pipe, and the winding body and a plurality of heat collecting members are molded with resin.
In the mold insulating layer, a plurality of heat collecting members are provided in the mold insulating layer, a refrigerant flow path is provided along the axial direction of the winding body, and a connection is made to an external heat exchanger through a connection pipe. As a result, it is possible to improve the cooling performance of the winding main body, thereby reducing the size and weight of the entire structure, and to improve the insulation reliability. In addition, when molding the winding body and the heat collecting member, only one end of the two refrigerant flow path forming pipes is pulled out from the casting mold, so that compared to the conventional configuration. As a result, the number of sealing portions for preventing resin leakage can be greatly reduced, the mold assembly becomes very simple, and the possibility of occurrence of void defects due to air suction during molding is greatly reduced. Manufacturability and insulation reliability can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a winding of a stationary induction device showing one 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 showing a winding main body before mold forming.

FIG. 5 is a perspective view showing a heat collecting member used in the present invention.

FIG. 6 is a perspective view showing a plate-like member constituting the heat collecting member.

FIG. 7 is a cross-sectional view of another embodiment of the plate member.

FIG. 8 is a cutaway perspective view showing a state where the winding body is housed in a casting mold.

FIG. 9 is a partial cross-sectional view showing an interconnected state of a heat collecting member.

FIG. 10 is a perspective view of a seal connecting member.

FIG. 11 is a diagram corresponding to FIG. 4, showing a conventional configuration.

FIG. 12 is a diagram corresponding to FIG. 5, showing a conventional configuration.

[Explanation of symbols]

11 is a winding body, 12 is a thin tube container 12, 13 is a disk-shaped winding unit, 16 is a connection pipe, 17 is a heat collecting member, 17a is a refrigerant flow path, 17d and 17e are refrigerant flow path forming pipes, 18 Is a mold insulating layer, 19 is a coolant channel, 20
Denotes a refrigerant inflow channel, 21 denotes a refrigerant outflow channel, 24 denotes a casting mold, and 171 denotes a plate member.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01F 27/08 H01F 27/18

Claims (6)

(57) [Claims] 1. A plurality of disc-shaped winding units which are constituted by a non-loop type thin tube heat pipe in which a working fluid is sealed in a hollow tubular thin tube container, and are stacked in the axial direction. A winding body having a plurality of plate-like windings provided between the plurality of disk-like winding units so as to be in close contact with the heat radiating portion of the disk-like winding unit, and having a refrigerant passage therein. A heat insulating member, a mold insulating layer covering the winding body and the heat collecting member, and a connection pipe connected to a refrigerant flow path of the heat collecting member and an external heat exchanger; The static induction device winding, wherein the heat members are each formed of an insulating resin, and are connected along the axial direction of the winding body so that the internal refrigerant flow paths communicate with each other. 2. The stationary induction machine winding according to claim 1, wherein a thickness of a portion of the heat collecting member that contacts the disc-shaped winding unit is thinner than other portions. 3. The heat collecting member is formed of a resin containing a filler such as silica, and has a linear expansion coefficient substantially equal to that of a mold insulating layer covering the winding body and the heat collecting member. The winding of a stationary induction machine according to claim 1, wherein: 4. The heat collecting member is formed of a resin mixed with a ceramic powder having high thermal conductivity such as boron nitride as a filler, and is substantially formed of a mold insulating layer covering the winding body and the heat collecting member. The static induction device winding according to claim 1, wherein the winding has a similar linear expansion coefficient and high thermal conductivity. 5. The method for manufacturing a static induction machine winding according to claim 1, wherein the winding body and the heat collecting member are housed in a casting mold, and a resin is provided in the casting mold. And a step of opening the casting mold after the injected resin is cured, wherein the plurality of heat collecting members adhere the communicating portions of the respective coolant flow paths to each other. A method for manufacturing a winding of a static induction device, wherein the winding is stored in a casting mold in a connected state. 6. The static induction device winding according to claim 5, wherein a seal connecting member made of a rubber-like elastic material is used for interconnecting the refrigerant flow passage portions of the heat collecting members. Manufacturing method.