JP2001160511A - Stationary induction apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in which a transformer is deteriorated in durability and efficiency due to the fact that insulating oil is warmed up by windings and a core, and raised in temperature when an oil chamber formed in a lower core clamping piece is made to communicate with the windings to cool down the windings with insulating oil in the oil chamber. SOLUTION: Insulating oil 22 is supplied to an oil chamber 20 from an outer oil guide pipe 11 distant from a winding 5 and a main leg 1, by which the insulating oil 22 is hardly warmed up and improved in cooling efficiency as it is kept distant from the core and the windings 5, so that a transformer can be lessened in size and elongated in service life. Moreover, the outer oil guide pipe is mounted only on the one side of the oil chamber 20, so that a general-purpose pipe can be used as the outer oil guide pipe.

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 such as a transformer and a reactor, and more particularly to a static induction device having an improved cooling structure with a lower metal core clamp.

[0002]

2. Description of the Related Art Generally, in a static induction electric device such as a transformer or a reactor, a leakage magnetic flux generated from a winding increases with an increase in capacity. The increase in loss due to the leakage magnetic flux and the local temperature rise are problems.

Conventionally, there is a method of arranging a shield in order to reduce the loss in the iron core fastener, or making the iron core fastener a box-shaped structure, and flowing an insulating oil to suppress a local temperature rise. . Of the above methods, the latter cooling method is often employed in large-capacity stationary induction devices.

However, in the method of flowing the insulating oil, since the iron core fastening member has a box-shaped structure made of a steel plate, the leakage flux from the windings penetrates into the iron core fastening member to increase the loss and to reduce local overheating. There were drawbacks that occurred.

On the other hand, a structure and a cooling system for reducing the loss generated in the lower metal core fastener are disclosed in JP-A-55-153.
303 and JP-A-59-121904, respectively. JP-A-55-121904 discloses an oil chamber that is connected to a winding and a cooling duct of an iron core.
Although the upper plate member of the oil chamber is made of an insulating material, the oil chamber is formed in the longitudinal direction of the lower metal core fastener, so that the number of working steps and the manufacturing cost tend to increase. In addition, the insulating oil sent from the cooler cools the lower metal core fastener, so that the temperature of the insulating oil rises and the windings and the iron core cannot be efficiently cooled.

On the other hand, Japanese Patent Application Laid-Open No. Sho 59-121904 discloses that an oil chamber is provided in a lower metal core clamp in order to efficiently cool a winding and an iron core constituting a transformer main body, and an oil chamber is provided at an end in the oil chamber longitudinal direction. The oil supply pipes from the common oil guide are connected to each other, and the oil distribution is precisely adjusted via the oil control valve at the opposite end. Therefore, the leakage magnetic flux from the windings penetrates, the loss increases, and it is insufficient to prevent local overheating.

[0007]

In the above prior art, there has been a problem that local overheating is caused by the lower metal core clamp of the transformer, and the cooling efficiency is poor due to the heating of the insulating oil.

It is an object of the present invention to provide a stationary induction device in which the leakage flux from the windings penetrates, the loss increases, the portion where local overheating occurs is reduced, and the cooling efficiency is improved.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a winding wound around an iron core, and iron core clamps provided on the upper and lower sides of one side and the other side of the winding. A mounting body, a transformer main body in which an iron core and a winding are fixed by the iron core tightening bracket, and a stationary body in which the transformer main body is housed in a tank and a cooling medium is circulated between the tank and the cooler for cooling. In the induction electric machine, a space surrounded by an iron core-side member of the lower iron core fastener and an upper member and a lower member extending on a winding side provided on a lower end thereof is formed, and a predetermined space is formed in this space. A cooling chamber having a through hole closed with the provided closing plate and communicating with the winding is formed, and an outer conductive pipe communicating with a cooler separated from an iron core of the cooling chamber formed on at least one side is provided. And

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the internal configuration of an oil-feeding three-phase five-legged transformer, and FIG. 2 is a front view showing the internal configuration in the AA cross section of FIG. FIG. 3 shows FIG.
It is a side view which shows the internal structure in the BB cross section of FIG. Figure 1
In 2 and 3, after connecting the main leg 1 and the side leg 2 with the lower yoke 4 and inserting the winding 5 into the main leg 1 and the side leg 2, the connection between the main leg 1 and the side leg 2 is made. Are connected by the upper yoke 3. A transformer main body formed by tightening between both sides of the winding 5 with an upper core tightening fitting 6 and a lower iron tightening fitting 7 is housed in a tank 10.

Further, the lower iron core fastener 7 for cooling the main leg 1 and the winding 5 is formed in a box shape, and forms a cooling passage composed of an upper member 7A and a lower member 7D and side members 7B and 7C. I do. The cooling passage has a structure in which a partition plate 7Z is provided for each winding 5 and an independent oil chamber 20 is formed. An oil chamber 20 is formed for each winding in the lower core fastener 7 arranged on both sides of the winding 5 of each phase, and an external oil guide pipe 11 is attached to the outside of the lower core fastener 7 to provide an external oil guide pipe. Cooler 3 for 11
It is connected to an oil feed pipe 12 that communicates with zero. The external oil guide pipe 11 has a through hole 25 communicating with the oil chamber 20 of each phase. Upper surface member 7A of lower iron core clamp 7 of oil chamber 20
Is provided with a through hole 25A communicating with the winding 5.

The tank 10 is connected to a cooler 30 having oil pumps (not shown) at the upper and lower ends.
The oil chamber 20 has an inlet connected to an oil pump (not shown) and an outlet connected to the main leg 1 and a cooling duct (not shown) for the winding 5. The upper surface member 7A and the side surface member 7B of the lower core fastener 7 are made of an insulator. Placeboard and reinforced wood are used as insulation.

According to this configuration, since the upper surface member 7A and the side member 7B of the lower core fastening member 7 are made of an insulating material, the leakage magnetic flux (not shown) from the winding 5 reduces the lower core fastening. Even if it enters the metal fitting 7, the insulating oil 22 in the oil chamber 20 cannot be warmed by an amount corresponding to an increase in loss at that portion or a portion at which local overheating occurs, thereby improving the cooling efficiency of the transformer. The service life of the vessel, that is, the service life, is also improved.

In order to cool the main leg 1 and the winding 5, the external oil guide pipe 11 only needs to be attached between the upper surface member 7A and the side member 7B. In addition, since general-purpose piping can be used, piping arrangement can be facilitated, work efficiency can be improved, and inexpensive general-purpose piping can be used. Further, an oil chamber 20 is formed for each winding of the lower core fastener 7, and a through-hole 25 is provided for flowing the insulating oil 22 from a part of the external oil guide pipe 11 to the oil chamber 20 as shown by an arrow. It can be manufactured inexpensively because it requires only a few man-hours.

Further, since the insulating oil 22 is supplied to the oil chamber 20 from the winding 5 and the external oil guide pipe 11 provided at a position distant from the iron core, the insulating oil 22 is hardly heated, and the cooling efficiency is reduced. The better you get away from 5. Further, since the external oil guide pipe 11 is closer to the tank side than the winding 5 and the side member 7B, the leakage magnetic flux (not shown) from the winding 5 can be reduced, so that the loss can be reduced. There is also a milit.

The material of the external oil guide pipe 11 is a steel plate normally used as the lower iron core clamp 7, and can be manufactured at a low cost by using a commercially available general-purpose square pipe. . Further, by manufacturing the material of the external oil guide pipe 11 from a normally used steel plate with a silicon steel plate, it is possible to reduce the loss.

Further, in FIG.
Reference numeral 2 denotes a common pipe 15 which divides the flow to the left and right. The oil flows from the external oil guide pipe 11 to the winding 5 via one side, that is, the left communication pipe 12. External oil guide pipe 11 via right-hand transmission pipe 12
To the winding 5. Thus, one side external oil guide pipe 1
If the 1 and the external oil guide pipe 11 on the other side are separately arranged,
When the pipes are assembled, they do not interfere with each other, so that the pipes can be easily seen, the pipe assembly work can be easily performed, and the work efficiency can be improved.

FIG. 4 shows another embodiment of the present invention. The same parts as those in FIG. 3 are denoted by the same reference numerals, and the description thereof will be omitted. As can be seen from FIG. 4, the magnetic shunt 50 is provided on the side member 7 </ b> C on the iron core side of the lower iron core fastener 7 corresponding to the outer conduit 11.

According to this configuration, even if the leakage magnetic flux (not shown) from the winding 5 attempts to enter the lower iron core fastener 7C, it is effectively attracted by the magnetic shunt 50.
It is possible to reduce the loss in the lower core fastening metal 7C and prevent local overheating, thereby improving the durability and efficiency of the transformer. As the material of the magnetic shunt 50, it is effective to use a material in which silicon steel plates or the like having high magnetic permeability are laminated. Further, as indicated by the arrow, the insulating oil 22 cooled from the oil pump (not shown) passes through the external oil guide pipe 11 and the oil chamber 20 provided in the lower iron core clamp 7 and the main leg 1 and the winding 5. Therefore, local overheating of the magnetic shunt 50 can be prevented, and a highly reliable stationary induction device can be provided.

FIG. 5 shows another embodiment of the present invention.
The same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted. As can be seen from FIG. 5, the external oil guide pipe 11 provided in a part of the lower core fastener 7 is a round pipe, and the magnetic shunt 50 is provided outside the side member 7C in the longitudinal direction of the tank 10 (perpendicular to the paper). The configuration is arranged.

According to this configuration, even if the leakage magnetic flux (not shown) from the winding 5 attempts to enter the lower iron core fastener 7C, it is effectively sucked by the magnetic shunt 50.
Since the loss in the lower core fastener 7C can be reduced and local overheating can be prevented, the durability and efficiency of the transformer can be improved. In addition, the material of the external oil guide pipe 11 is a steel plate normally used for the lower metal core fastener 7, and the use of a commercially available round pipe makes it possible to manufacture the pipe at low cost.

Also, a round pipe is used for the oil-conducting pipe 11 and the pipe which communicates with the lower iron core clamp 7, and the round pipe is used to connect a lead wire drawn out from a winding and another electric appliance. You may. In this case, it is necessary to provide an insulating means at the point where the round pipe is connected to another electric conductor, or to configure the round pipe with an insulator or cover it with an insulator.

FIGS. 6 and 7 show another embodiment of the present invention. FIG. 6 is a plan view showing the internal configuration of the oil-feeding three-phase five-leg transformer, and FIG. 7 is a side view showing the internal configuration in the AA section of FIG. 1 and 3 are denoted by the same reference numerals and description thereof is omitted. Figure 6
As can be seen from FIG. 7, the structure in which the insulating oil 22 flows from the cooler 30 through the common pipe 15 and the oil feed pipe 12 to the lower iron core fastener 7 from one external oil guide pipe 11 as shown by the arrow. It has become. Further, the insulating oil 22 flowing into the lower iron core clamp 7 via the external oil guide pipe 11 is
As shown by the arrow, one side flows into the winding 5 on the right side of the figure,
The other side is diverted downward through a through hole 25B provided in a part of the lower surface member 7D of the lower core fastener, and the core base 35
Through the lower cooling passage 35C formed through the lower core 7 and the through-hole 25B provided in a part of the lower surface member 7D of the lower-side clamp 7 on the opposite side. And the lower core fastening metal 7 is cooled. As shown by arrows, gaps for allowing the insulating oil 22 to pass therethrough are appropriately formed between the laminated iron core plates constituting the main leg 1. 10A is a tank bottom plate.

That is, the iron core side member 7 of the lower iron core fastener 7
C and a space surrounded by an upper surface member 7A and a lower surface member 7D extending on the winding side provided on the lower end thereof, and a partition plate 7Z provided at a predetermined interval in this space.
Chamber 2 having a through-hole 25A communicating with winding 5
0 is formed, and an external oil guide pipe 11 communicating with the cooler 30 is mounted outside the oil chamber 20. A core base 35 which supports the main leg 1 of each phase and is attached at a predetermined interval to a lower part of a lower core fastener which is disposed on one side and the other side of the winding 5;
A lower cooling passage 35C is formed by the winding 5, the main leg 1, and the corresponding tank bottom surface 10 </ b> A, and the insulating oil 22 from the cooler 30 and the external oil guide pipe 11 is transferred from the right oil chamber 20 to the winding 5 and the lower The oil is diverted to the cooling passage 35C,
0 to cool the winding 5.

According to this configuration, one external oil guide pipe 1 is provided from the cooler 30 via the common pipe 15 and the oil feed pipe 12.
Since the structure is such that it flows into the lower iron core clamp 7 from one, the number of the oil supply pipes 12 in FIG. 1 can be reduced, and an inexpensive stationary induction device can be provided. Also, a lower cooling passage 35C is provided for flowing the insulating oil 22 flowing from the external oil guide pipe 11 into the oil chamber 20 to the opposite oil chamber 20, and there is no need to provide a dedicated oil guide pipe. Since the lower side of the winding 5 can be cooled, efficient cooling can be performed.

That is, the lower side of the main leg 1 and the winding 5 is always cooled by the insulating oil 22 in the lower cooling passage 35C.
The cooling efficiency can be improved by the provision of the lower cooling passage 35C.

FIGS. 8 and 9 show another embodiment of the present invention. FIG. 8 is a plan view showing the internal configuration of the oil-feeding three-phase five-leg transformer, and FIG. 9 is a side view showing the internal configuration in the AA section of FIG. 6 and 7 are denoted by the same reference numerals and description thereof is omitted. Figures 8 and 9
As can be seen from FIG.
From 0, the insulating oil 22 flows into the oil chamber 20 of the lower metal core clamp 7 through the common pipe 15 and the oil supply pipe 12 as indicated by the arrow.

According to this configuration, the insulating oil 22 flows directly from the cooler 30 via the common pipe 15 and the oil supply pipe 12 to the oil chamber 20 provided in the lower iron core clamp 7. Simplification, the external oil guide pipe 11 can be omitted, and an inexpensive and highly reliable static induction device can be provided.

FIGS. 10 and 11 show another embodiment of the present invention. FIG. 10 is a plan view showing the internal configuration of an oil-feeding three-phase five-legged transformer, and FIG. 11 is a side view showing the internal configuration in the AA section of FIG. 8 and 9 are denoted by the same reference numerals and description thereof is omitted. As can be seen from FIGS. 10 and 11, the external oil guide pipe 11 is eliminated, and the cooler 30 arranged on both sides of the transformer main body is connected to the lower iron core clamp 7 via the common pipe 15 and the oil feed pipe 12. The configuration is such that the insulating oil 22 flows into the oil chamber 20 provided as shown by the arrow.

According to this configuration, the insulating oil 22 cooled by the cooler 30 is supplied from both sides to the common pipe 1 as shown by the arrows.
5. Since the oil flows through the oil supply pipe 12 to the oil chamber 20 constituted by the lower iron core clamp 7, it is possible to provide a stationary induction device with improved cooling efficiency.

Further, since the coolers 30 are dispersed on the left and right sides perpendicular to the longitudinal direction of the windings of each phase, the longitudinal direction of the windings of each phase does not become long, and the coolers 30 are arranged in a line. The width of the interval is wider and the work is easier than in the case where the operation is performed.

FIG. 12 shows another embodiment of the present invention.
FIG. 2 is a plan view showing an internal configuration of a phase five-leg transformer. The same parts as those in FIG. 10 are denoted by the same reference numerals, and description thereof will be omitted. As can be seen from FIG.
A cooler 30, a common pipe 15, and an oil feed pipe 12 are arranged on both sides opposite to the above, and an insulating oil is supplied to an oil chamber 20 formed by the external oil guide pipe 11 and the lower iron core clamp 7 as shown by an arrow. 22.

According to this configuration, the cooler 30 is connected to the tank 1
By arranging the oil supply pipe 12 and the common pipe 15 of FIG. 1 by arranging the oil supply pipe 12 and the common pipe 15 of FIG.
Since the insulating oil 11 is not easily heated and the cooling efficiency is improved, and the length of the oil supply pipe 12 and the common pipe 15 is greatly reduced to increase the mechanical strength, the oil transmission by the magnetic vibration of the transformer is performed. The amount of vibration of the pipe 12 and the common pipe 15 is reduced, and the possibility that the insulating oil leaks at the connection point is reduced.

Since the number of oil supply pipes 12 for cooling the main leg 1 and the windings 5 from the cooler 30 can be reduced, the number of assembling steps can be reduced and work efficiency can be increased. Although the present invention has been described in the case where six coolers 30 are arranged,
It goes without saying that the same effect can be expected even when the number of the coolers 30 is changed.

In the above-mentioned various embodiments, the case where the iron core fastening member 7 is constituted by a commonly used steel plate and an insulator is described as an example. Needless to say, can be expected.

Further, the common pipe 15 and the cooler 30 on one side and the common pipe 15 and the cooler 30 on the other side are separately arranged as in FIG. Since the cooler and the piping can be seen immediately without interfering with each other, it is possible to prevent forgetting to attach and mistakes in assembly, so that the worker can work with peace of mind and improve the efficiency of the assembly work.

FIG. 13 shows another embodiment of the present invention.
FIG. 2 is a plan view showing an internal configuration of a phase three-leg transformer. The same parts as those in FIG. 12 are denoted by the same reference numerals, and description thereof will be omitted. As can be seen from FIG. 13, two external oil guide pipes 11 are connected from the cooler 30 via the common pipe 15 and the oil feed pipe 12, and the oil chamber is connected by the external oil guide pipe 11 and the lower core fastener 7. 20 is formed.

According to this configuration, since the two external oil guide pipes 11 are connected, the cooler 30 and the common pipe 1 are connected.
The insulating oil 22 flowing from the main leg 1 and the winding 5 can be efficiently flown to the main leg 1 and the winding 5, and the cooling efficiency of the main leg 1 and the winding 5 can be improved.

FIG. 14 is a plan view showing an internal configuration of an oil-feeding single-phase center core transformer according to another embodiment of the present invention. As can be seen from FIG. 14, the insulating oil 22 flows to the oil chamber 20 via the two coolers 30, the common pipe 15, and the oil feed pipe 12, as indicated by the arrows, and thereafter, the lower surface member 7D of the lower iron core clamp is attached. (Not shown) through hole 25 provided in a part of
(Not shown), through a core base 35 (not shown), from a hole 25 (not shown) provided in a part of the lower surface member 7D (not shown) of the lower-side lower metal core fastener. The structure is such that the oil flows into the oil chamber 20 and the winding 5.

According to this configuration, the insulating oil 22 is supplied from the cooler 30 to the common pipe 15 and the oil feed pipe 1 as shown by arrows.
Oil chamber 20 provided in lower core fastener 7 via
Then, a hole (not shown) is provided in a part of the lower surface member 7D (not shown) of the lower core tightening fitting, and the lower core tightening on the opposite side is provided via the core base 35 (not shown). Since the structure is such that it flows into the lower surface member 7D (not shown) of the metal fitting, it is possible to provide a stationary induction device with high cooling efficiency and high reliability.

FIG. 15 is a plan view showing the internal configuration of an oil-feeding single-phase two-legged transformer according to another embodiment of the present invention. As can be seen from FIG. 15, the insulating oil 22 flows through the cooler 30, the common pipe 15, and the oil supply pipe 12 to the oil chamber 20 provided in the lower core fastener 7 as shown by the arrow. .

According to such a configuration, the insulating oil 22 is provided to the lower iron core clamp 7 from the two coolers 30 via the common pipe 15 and the two oil feed pipes 12, as indicated by arrows. The oil flows into the oil chamber 20, and then passes through the lower member 7D (not shown) of the lower core fastener and the lower member 7D (shown) of the opposite lower core fastener via the core base 35 (not shown). ) To the oil chamber 20, it is possible to provide a stationary induction device with improved cooling efficiency in the main leg 1 and the winding 5.

FIG. 16 is a plan view showing the internal configuration of an oil-feeding single-phase four-legged transformer according to another embodiment of the present invention. As can be seen from FIG. 16, a cooling flow passage is formed in the oil chamber 20 provided in the lower core fastener 7 via the cooler 30, the common pipe 15, and the oil supply pipe 12.

According to such a configuration, the insulating oil 22 is provided to the lower iron core clamp 7 from the two coolers 30 via the common pipe 15 and the two oil feed pipes 12, as indicated by arrows. The oil flows into the oil chamber 20, and then passes through the lower member 7D (not shown) of the lower core fastener and the lower member 7D (shown) of the opposite lower core fastener via the core base 35 (not shown). ), The cooling efficiency of the main leg 1 and the windings 5 is improved, local overheating of the transformer body is prevented, and a highly reliable stationary induction electric appliance is provided. Can be.

Although the present invention has been described with respect to an example in which two coolers 30 are arranged, it goes without saying that the same effect can be expected even when the number of coolers 30 is changed.

Although the structure in which the cooler 30 is disposed on one side is described as an example, it is needless to say that the same effect can be expected when the cooler 30 is disposed on both sides. In the present invention, it goes without saying that the same effect as described above can be expected even if a cooling medium such as SF6 gas or perfluorocarbon liquid is used in addition to the transformer insulating oil.

[0047]

As described above, according to the present invention, since the cooling medium is supplied to the cooling chamber from the external conduit away from the windings and the iron core, the cooling medium is hardly heated, and the cooling efficiency is reduced. And the distance from the windings, the cooling efficiency of the transformer is improved, the transformer is downsized and the service life of the transformer, that is, the service life is improved. Since it is only necessary to attach to one side, general-purpose piping can be used, so piping arrangement can be facilitated, work efficiency can be improved, and inexpensive general-purpose piping can be used.

[Brief description of the drawings]

FIG. 1 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core clamp according to an embodiment of the present invention.

FIG. 2 is a front view of a stationary induction device showing a cooling configuration of a lower iron core fastener in the embodiment of the present invention.

FIG. 3 is a side view of a stationary induction device showing a cooling configuration of a lower iron core clamp according to the embodiment of the present invention.

FIG. 4 is a side view of the stationary induction device showing a cooling configuration of the lower iron core fastening according to the embodiment of the present invention.

FIG. 5 is a side view of the stationary induction device showing a cooling configuration of the lower iron core fastener in the embodiment of the present invention.

FIG. 6 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core clamp according to the embodiment of the present invention.

FIG. 7 is a side view of the stationary induction device showing a cooling configuration of the lower iron core fastener in the embodiment of the present invention.

FIG. 8 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core fastener in the embodiment of the present invention.

FIG. 9 is a side view of the stationary induction device showing a cooling configuration of the lower iron core fastener in the embodiment of the present invention.

FIG. 10 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core clamp according to the embodiment of the present invention.

FIG. 11 is a side view of the stationary induction device showing the cooling configuration of the lower iron core fastener in the embodiment of the present invention.

FIG. 12 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core clamp according to the embodiment of the present invention.

FIG. 13 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core clamp according to the embodiment of the present invention.

FIG. 14 is a plan view of the stationary induction device showing a cooling configuration of the lower iron core fastener in the embodiment of the present invention.

FIG. 15 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core clamp according to the embodiment of the present invention.

FIG. 16 is a plan view of a stationary induction device showing a cooling configuration of a lower iron core fastener in the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main leg, 2 ... Side leg, 3 ... Upper yoke, 4 ... Lower yoke, 5
... winding, 6 ... upper core clamp, 7 ... lower core clamp, 7A ... upper member, 7B, 7C ... side member, 7D ... lower member, 10 ... tank, 11 ... external oil pipe, 12 ... Oil supply piping, 15: common piping, 20: oil chamber, 22: insulating oil,
25, 25A, 25B ... through-hole, 30 ... cooler, 35 ...
Core base, 50 ... magnetic shunt.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Etsunori Mori 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Hitachi, Ltd. Kokubu Office (72) Inventor Masaru Kashiwakura 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi Kokubu Office Hitachi, Ltd. (72) Inventor Miya ▲ Saki ▼ Toshiyuki 1-1-1 Kokubuncho, Hitachi City, Ibaraki Prefecture F-term in Hitachi Kokubu Office 5E050 CA04 CA06

Claims (10)

[Claims] 1. A winding wound around an iron core, an iron core fastening member provided at an upper part and a lower part on one side and the other side of the winding, and the iron core and the winding are fixed by the iron core fastening metal. The transformer body and the stationary body in which the transformer body is housed in a tank and a cooling medium is circulated and cooled between the tank and the cooler. In addition, a space surrounded by the upper surface member and the lower surface member extending to the winding side provided at the lower end is formed, and the space is closed by a partition plate provided at a predetermined interval, and a through hole communicating with the winding is formed. A static induction electric device comprising: a cooling chamber having at least one side thereof; and an external conducting pipe communicating with a cooler provided at least on one side of the cooling chamber and separated from an iron core of the cooling chamber. 2. A winding wound around an iron core, iron core fasteners provided on upper and lower sides of one side and the other side of the winding, and the iron core and the winding are fixed by the iron core fastener. The transformer body and the stationary body in which the transformer body is housed in a tank and a cooling medium is circulated and cooled between the tank and the cooler. In addition, a space surrounded by the upper surface member and the lower surface member extending to the winding side provided at the lower end is formed, and the space is closed by a partition plate provided at a predetermined interval, and a through hole communicating with the winding is formed. Forming a cooling chamber, supporting the cores of each phase, and a core base attached at a predetermined interval to a lower portion of a lower core fastening member arranged on one side and the other side of the winding, and a winding; The lower cooling passage is formed by the iron core and the corresponding tank bottom. And an external conduit connected to the cooler is attached to the outside of the lower cooling passage on one side, and the cooling medium from the external conduit flows through the lower cooling passage from the cooling chamber on one side and is supplied to the cooling chamber on the other side. A static induction device characterized by the following. 3. A winding wound around an iron core, core fastening members provided on upper and lower sides of one side and the other side of the winding, and the core and the winding are fixed by the core fastening bracket. The transformer body and the stationary body in which the transformer body is housed in a tank and a cooling medium is circulated and cooled between the tank and the cooler. In addition, a space surrounded by the upper surface member and the lower surface member extending to the winding side provided at the lower end is formed, and the space is closed by a partition plate provided at a predetermined interval, and a through hole communicating with the winding is formed. A cooling chamber having a cooling chamber, and an external conduit connected to a cooler separated from the iron core of the cooling chamber is provided on one side of the cooling chamber, and one side and the other side of the external conductive pipe are connected to one side in the longitudinal direction of the iron core and the winding. Connect coolers located on the side and the other side A static induction device characterized by the following. 4. The stationary induction device according to claim 1, wherein the upper surface member and the side member on the side of the external conduit are made of an insulating material. 5. The stationary induction device according to claim 1, wherein the lower metal core fastener is made of an insulating material. 6. The stationary induction device according to any one of claims 1 to 3, wherein a magnetic shunt is provided on a side member on the iron core side of the lower iron core clamp corresponding to the external conduit. 7. A magnetic shunt is provided on the upper surface member and the side member on the side of the cooler.
A static induction device according to item 1. 8. The static induction device according to claim 6, wherein the magnetic shunt is made of a magnetic material such as a silicon steel plate or an amorphous material. 9. The static induction device according to claim 1, wherein a square pipe or a round pipe is used for the external conducting pipe. 10. The static induction device according to claim 2, wherein a through hole communicating with the iron core is provided in the lower cooling path.