JP2003077737A - Winding of electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain winding in electric equipment that has improved cooling characteristics and a high winding occupation rate in the winding of electric equipment having an electric insulating cooling medium such as an oil-filled transformer. SOLUTION: In the winding in electric equipment in a multi-section cylindrical winding structure, sections (S1, S2, S3, and the like) have a spacer 5 where the channel in the electric insulating cooling medium is provided in an axial direction and a radius direction. The cooling medium flows as shown by an arrow B along a side section 7a of a film electric wire 1 in a groove that is the channel of the cooling medium formed in the axial direction of the spacer 5 due to natural convection. Then, the cooling medium flows along an upstream section side section 8a of the cooling medium in a groove that is the channel of the cooling medium formed in the radius direction of the spacer 5 due to natural convection as shown by an arrow C, thus improving the cooling characteristics.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding wire of an electric device such as a transformer or a reactor.

[0002]

2. Description of the Related Art As an example of a winding of an electric device, a high voltage winding of a dry type transformer such as a 6 kV molded transformer for distribution has a winding structure called a multi-section cylindrical winding. In the multi-section cylindrical winding structure, the entire winding is divided into multiple sections in the axial direction, and each section has a cylindrical winding structure. Since the winding space factor is better than that of a normal cylindrical winding structure. Widely used for high voltage winding of dry type transformer such as mold transformer.

FIG. 10 is an axial sectional view showing an example of a general structure of a winding of an electric device adopting a conventional multi-section cylindrical winding structure, showing an example of a molded transformer.
In FIG. 10, 1 is a covered electric wire, 2 is a barrier, 3 is a resin spacer, 4 is a cast insulator, S1 is a first section,
S2 is the second section and S3 is the third section.
A is the central axis of the winding, and this direction is the axial direction.

In determining the transformer winding specifications, first, the voltage generated per one turn of the winding, the rough selection range of which is determined by the manufacturing results of the transformer capacity and the like, is determined. Next, the total number of winding turns required to generate a predetermined voltage specified by the standard or specification is obtained. Next, the number of sections of the entire winding and the number of windings and the number of layers in each section are determined so as to satisfy a predetermined winding height limited by the window height of the iron core used. The number of layers in each section is preferably an odd number to facilitate the passage of wires from one section to the next.

In the example of FIG. 10, the voltage generated per turn of the winding is 7.23 V, the total number of turns is 539,
The entire winding is divided into 11 sections (only the upper three sections S1 to S3 are shown in FIG. 10), and each section has 7 turns with 7 turns, for a total of 4 sections.
Nine turns are wound in a cylinder.

As the winding procedure, first, in the first section S1 formed of the resin spacer 3, the first turn is performed from the inside of the winding structure on the barrier 2 as the first lowermost layer,
Roll 2nd turn, 3rd turn, ~, 7th turn in a row. Next, on the winding of the first layer, the 8th turn, the 9th turn, the 10th turn of the second layer directly following the first layer,
~, 14th turn is rewound in the direction opposite to the winding direction from the 1st turn to the 7th turn of the first layer.
Thereafter, a total of 7 layers of winding are wound in the first section S1 by the same procedure.

Next, the last 49th turn winding of the seventh layer, which is the outermost layer in the first section S1, is placed along the resin spacer 3 of the next second section S2 and lowered to the innermost layer of the winding. Then, similarly to the first section S1, the 50th turn, the 51st turn, the 52nd turn, to the 56th turn are continuously wound as the lowermost first layer. Next, on the winding of the first layer, the 57th turn, the 58th turn, the 59th turn, and the 63rd turn of the second layer, which are continued from the first layer, are turned 50 turns of the first layer. Rewind in the direction opposite to the direction from the eye to the 56th turn. In the same procedure as described below, the windings for a total of 7 layers are connected to the second section S2.
Wrap inside.

Thereafter, a total of 11 sections are wound in the same procedure to form a winding. Next, the winding is fixed in a mold, and a cast insulator 4 is provided between the covered electric wires 1 and between the resin spacers 3.
And then heat-cured to complete the entire winding.
The amount of heat generated in this winding is transferred to the casting insulator 4 by heat conduction, and is radiated by heat transfer to the air that naturally convections from the lower side to the upper side of the winding.

[0009]

However, since the winding structure by the multi-section cylindrical winding used in such a dry transformer as the molded transformer has a poor cooling characteristic, for example, 6 kV for distribution. It could not be applied to windings such as oil-filled transformers, which account for the majority of transformers.

Further, as windings for electric equipment such as oil-filled transformers, there is a need for a more compact and high winding space factor in view of social demands for resource saving and energy saving in recent years. Is increasing.

The present invention has been made in order to solve the above problems, and is a winding of an electric device having an electrically insulating cooling medium such as an oil-filled transformer, the winding having excellent cooling characteristics. The purpose is to obtain windings of electric equipment with a high space factor.

[0012]

A winding of an electric device according to the present invention is a winding of an electric device having a multi-section cylindrical winding structure, in which a section of a flow path of an electrically insulating cooling medium is provided in an axial direction. It is provided with spacers provided in the radial direction.

The winding of the electric device according to the present invention is
In a winding of an electric device having a multi-section bale winding structure, in the section, 6 in the axial direction of the flow path of the electrically insulating cooling medium and the direction in which the cooling medium flows in the axial direction.
It is provided with a spacer provided in a direction forming an angle of 0 °.

The winding of the electric device according to the present invention is
The spacer has grooves formed on the front surface and the back surface thereof to form a flow path of the cooling medium.

The winding of the electric device according to the present invention is
The arrangement angle of the spacer around the central axis of the winding is changed between the adjacent sections so that the cooling medium flows in the grooves on the front surface and the back surface of the spacer.

The winding of the electric device according to the present invention is
The shape of the spacer is changed between adjacent sections so that the cooling medium flows in the grooves on the front surface and the back surface of the spacer.

The winding of the electric device according to the present invention is
In the winding of electrical equipment of multi-section cylindrical winding structure,
The section is provided with a plurality of spacers that form a flow path of an electrically insulating cooling medium in the axial direction and the radial direction.

The winding of the electric device according to the present invention is
In a winding of an electric device having a multi-section bale winding structure, a plurality of spacers that form a flow path of an electrically insulating cooling medium in an axial direction and in a direction forming an angle of 60 ° with respect to the axial direction in the section. Be prepared.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is an axial cross-sectional view showing a configuration of a winding wire of an electric device according to a first embodiment of the present invention. In the drawing, 1 is a covered electric wire, 2 is a cylindrical barrier, and 5 is a cooling medium not shown. Spacers provided with the flow passages in the axial direction and the radial direction, 6 is a gap between the coated electric wires 1, 7a is a portion of the groove formed in the axial direction of the spacer 5 which is a channel of the cooling medium, and 8a is a covered electric wire. Is a portion of the groove, which is a channel for the cooling medium formed in the radial direction of the spacer 5, on the upstream section side of the cooling medium, S1 is the first section, S
2 is the second section, and S3 is the third section. A is the central axis of the winding, and this direction is the axial direction. In addition, arrows B and C indicate the direction in which a cooling medium (not shown) flows. As the cooling medium, an electrically insulating liquid such as insulating oil is used.

FIG. 1 shows a winding specification similar to that of the winding configuration of the electric equipment of FIG. 10 which is a conventional technique (voltage generated per one winding of the winding is 7.23 V, total winding turn is 539 V).
The number of windings is 11 and the total winding is 11
Section (the upper three sections in FIG. 1, S1
Through S3), each section has 7 layers with 7 turns per layer, for a total of 49 turns, which are wound in a cylindrical shape.

As a winding procedure, first, a predetermined number of spacers 5 are provided on the barrier 2, and the first layer, which is the lowermost layer from the inside of the winding structure, is formed on the spacers 5 of the first section S1.
Continue winding the 1st, 2nd, 3rd, ~, and 7th turns. Next, on the winding of the first layer, the 8th turn, the 9th turn, the 10th turn, ..., and the 14th turn of the 2nd layer, which continued directly from the 1st layer, are turned one turn of the 1st layer. Rewind in the direction opposite to the direction from the eye to the 7th turn. Thereafter, a total of 7 layers of winding are wound in the first section S1 by the same procedure.

Next, the last 49th turn of the seventh layer, which is the outermost layer in the first section S1, is arranged along the spacer 5 of the next second section S2 (for example, the opening 5 in FIG. 2).
(through a), lower to the innermost layer of the winding, and subsequently, as the first section, wind 50th turn, 51st turn, 52nd turn, to 56th turn as the first layer of the lowest turn. Next, on the winding of the first layer, the 57th turn, the 58th turn, and the 5th turn of the second layer directly following the first layer.
The 9th turn, the 63rd turn, and the 63rd turn are rewound in the direction opposite to the winding direction from the 50th turn to the 56th turn of the first layer. Thereafter, a total of seven layers of winding are wound in the second section S2 by the same procedure.

In the following, a total of 11 sections are wound by the same procedure to complete the entire winding.

FIG. 2 is a diagram showing a structural example of the spacer 5 in which the flow path of the cooling medium in the winding of the electric device according to the first embodiment of the present invention is provided in the axial direction and the radial direction.
The same reference numerals denote the same or corresponding parts. In FIG. 2, 5a is an opening, 7b is a barrier 2 side portion of a groove which is a cooling medium flow path formed in the axial direction of the spacer 5, and 8b.
Is a portion of the groove, which is a channel for the cooling medium formed in the radial direction of the spacer 5, on the downstream section side of the cooling medium, and R is the radial direction. The barrier 2 side portion 7b of the groove, which is a cooling medium passage formed in the axial direction of the spacer 5, has a function of supplying the cooling medium from the upstream section to the downstream section of the axial flow of the cooling medium. is doing.

As described above, on the front surface and the back surface of the axial direction portion of the cooling medium flow path of the spacer 5, the covered electric wire 1 side portion 7a of the groove which is the cooling medium flow path formed in the axial direction and the axial direction. The barrier 2 side portion 7b of the groove, which is the flow path of the cooling medium formed in the above, is formed. Further, on the front surface and the back surface of the radial direction portion of the flow path of the cooling medium of the spacer 5, the cooling medium upstream section side portion 8a of the groove which is the flow path of the cooling medium formed in the radial direction and the radial direction are formed. Section 8 of the cooling medium downstream section of the groove which is the flow path of the cooling medium
b is formed.

The spacer 5 can be manufactured by molding a corrugated press board, for example. That is, in the example of FIG. 2, the cross-sectional shape of the spacer 5 provided with the cooling medium passage in the axial direction and the radial direction orthogonal to the flowing direction of the cooling medium is wavy.

In the spacer 5 shown in FIG. 2, the coated electric wire 1 side portion 7a of the groove which is a channel of the cooling medium formed in the axial direction.
1, the cooling medium flows by natural convection from the upstream side to the downstream side as indicated by an arrow B in FIG. 1, and a portion of the groove, which is a cooling medium flow path formed in the radial direction of the spacer 5, is located on the upstream section side of the cooling medium. The cooling medium flows along the line 8a from the inner circumference side of the winding to the outer circumference side of the winding by natural convection as shown by an arrow C in FIG. Further, the flow of the cooling medium along the barrier 2 side portion 7b of the groove which is the channel of the cooling medium formed in the axial direction of the spacer 5 causes the cooling medium of the groove which is the channel of the cooling medium formed in the radial direction. A cooling medium flows along the downstream section side portion 8b of the cooling medium.

For example, when the spacers 5 having the same shape are used, the flow of the cooling medium in the grooves on the front surface and the flow in the groove on the rear surface of the spacer 5 are ensured to radiate heat by heat transfer to the cooling medium of each section. In order to perform effectively, it is necessary to change the arrangement angle of the spacer 5 around the central axis (A axis) of the winding between the adjacent sections.

FIG. 3 is an explanatory diagram of the arrangement angle change of the spacer 5 around the central axis of the winding in the winding of the electric device according to the first embodiment of the present invention, which is formed in the axial direction of the spacer 5. A part of the grooves 7a and 7b which are the flow paths of the cooling medium is shown. Further, in FIG. 3, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding portions, and T is the spacer 5
Repeatedly formed by connecting the covered electric wire 1 side portion 7a of the groove which is the cooling medium flow path formed in the axial direction and the barrier 2 side portion 7b of the groove which is the cooling medium flow path formed in the axial direction. It is the circumferential length of one unit of the shape.

FIG. 3A shows a case where there is no change in the arrangement angle of the spacer 5 around the central axis of the winding in the first section S1 to the third section S3. Further, FIG. 3B shows that the axial length of the spacer 5 is shifted by ½ of the circumferential length T of one unit of the repeating shape in the circumferential direction, and the central axis of the winding is wound between the adjacent sections. Surrounding spacer 5
The case where the arrangement angle change is given is shown.

In the case of FIG. 3 (a), in the third section S3, the groove is formed in the axial direction of the spacer 5 and is formed in the radial direction of the coated electric wire 1 side portion 7a of the groove which is the flow path of the cooling medium. Further, a flow of the cooling medium (B → C in FIG. 1) can be generated through the upstream section side portion 8a of the groove that is the flow path of the cooling medium. Further, the flow of the cooling medium passing through the barrier 2 side portion 7b of the groove, which is the channel of the cooling medium formed in the axial direction of the spacer 5, causes the cooling medium of the groove, which is the channel of the cooling medium formed in the radial direction. There is also a flow of cooling medium through the downstream section side part 8b of the.

However, the spacer 5 of the third section S3
Since most of the flow of the cooling medium passes through the second section S2 and the first section S1 through the barrier 2 side portion 7b of the groove that is the cooling medium flow path formed in the second section, In S2 and the first section S1,
The flow of the cooling medium can be ensured in the downstream section side portion 8b of the cooling medium of the groove, which is the flow channel of the cooling medium formed in the radial direction of the spacer 5, but the flow channel of the cooling medium formed in the axial direction of the spacer 5 It is not possible to secure the flow of the cooling medium passing through the coated wire 1 side portion 7a of the groove and the flow of the cooling medium passing through the upstream section side portion 8a of the groove which is the flow path of the cooling medium formed in the radial direction. Therefore, the winding cannot be cooled effectively.

In the case of FIG. 3 (b), the third section S3 is cooled as effectively as in FIG. 3 (a). In addition, the second section S2 is the third section S3.
Part of the flow of the cooling medium passing through the barrier 2 side portion 7b of the groove, which is the flow path of the cooling medium formed in the axial direction of the spacer 5 of the second section S2, is formed in the axial direction of the spacer 5 of the second section S2. The flow of the cooling medium through the coated electric wire 1 side portion 7a of the groove which is the channel and the upstream section side portion 8a of the groove which is the channel of the cooling medium formed in the radial direction (B →
C). Further, the barrier 2 of the groove, which is a channel of the cooling medium formed in the axial direction of the spacer 5 of the third section S3.
Since a part of the flow of the cooling medium passing through the side portion 7b becomes the flow of the cooling medium passing through the barrier 2 side portion 7b of the groove, which is a channel of the cooling medium formed in the axial direction of the spacer 5 of the second section S2. Also, the flow of the cooling medium can be secured in the downstream section side portion 8b of the cooling medium of the groove, which is the channel of the cooling medium formed in the radial direction of the spacer 5 of the second section S2. Further, in the first section S1, the same flow of the cooling medium as in the second section S2 can be secured. Therefore, the winding can be effectively cooled.

FIG. 4 shows an example in which the shape of the spacer 5 provided in the windings of the electric device according to the first embodiment of the present invention in which the flow path of the cooling medium is provided in the axial direction and the radial direction is changed for each section. It is a figure and shows a part of groove | channels 7a and 7b which are the flow paths of the cooling medium formed in the axial direction of the spacer 5. Further, in FIG. 4, the same reference numerals as those in FIGS. 1 and 2 denote the same or corresponding portions, and Ti (i = 1 to 3)
Is a covered electric wire 1 side portion 7a of a groove which is a channel of a cooling medium formed in the axial direction of the spacer 5 in the i-th section Si (i = 1 to 3) and a channel of the cooling medium formed in the axial direction. It is a unit length in the circumferential direction of a repeating shape formed by continuation of the barrier 2 side portion 7b of the groove. Also,
The configuration of FIG. 4 shows an example in which the circumferential length Ti of one unit of the repeating shape of the spacer 5 is changed between the adjacent sections, and the spacer 5 in the second section S2 is changed.
The circumferential length T2 of one unit of the repeating shape is the circumferential length T3 of one unit of the repeating shape of the spacer 5 in the third section S3 and the circumferential length of one unit of the repeating shape of the spacer 5 in the first section S1. It is half of T1.

In the configuration of FIG. 4 as well, similar to FIG. 3B, the second section S2 is a barrier of a groove which is formed in the axial direction of the spacer 5 of the third section S3 and which is a channel for the cooling medium. A part of the flow of the cooling medium passing through the second side portion 7b is formed in the groove 7 which is a channel of the cooling medium formed in the axial direction of the spacer 5 of the second section S2 and in the radial direction of the covered electric wire 1 side portion 7a. Flow of the cooling medium passing through the upstream section side portion 8a of the groove which is the flow path of the cooling medium (B → C in FIG. 1)
Becomes In addition, a part of the flow of the cooling medium passing through the barrier 2 side portion 7b of the groove, which is a channel of the cooling medium formed in the axial direction of the spacer 5 of the third section S3, is partially removed.
Since the cooling medium flows through the barrier 2 side portion 7b of the groove, which is a cooling medium flow path formed in the axial direction of the second spacer 5, the cooling formed in the radial direction of the spacer 5 in the second section S2. The flow of the cooling medium can be secured also in the downstream section side portion 8b of the cooling medium of the groove which is the flow path of the medium.
Further, in the first section S1, the same flow of the cooling medium as in the second section S2 can be secured. Therefore, the winding can be effectively cooled.

As described above, for example, as shown in FIG. 3B or FIG. 4, the cooling medium is configured to flow in the grooves on the front surface and the back surface of the spacer 5, so that the winding in each section is Since the amount of heat generated can be effectively removed by heat transfer, the entire winding can be effectively cooled. Therefore, it is possible to realize a winding of an electric device having an excellent cooling characteristic and a high winding space factor.

In the above description, the case where the cylindrical winding circumscribes the axial portion of the spacer 5 having the shape shown in FIG. 2 has been described, but the present invention is not limited to such a shape. For example, other winding shapes such as rectangle,
The shape of the spacer 5 may be determined according to the winding shape.

Further, in the above description, the spacer 5 provided in the axial and radial directions of the cooling medium flow path has a wavy cross-section orthogonal to the direction in which the cooling medium flows, and the spacer 5 has a front surface and a back surface. Although the case where the groove forming the flow path of the cooling medium is provided is shown, the present invention is not limited to such a cross-sectional shape, and the flow path of the cooling medium is provided in the axial direction and the radial direction. I wish I had it.

Embodiment 2. FIG. 5 is an explanatory diagram showing a configuration of a spacer 9 that forms a flow path of a cooling medium in a winding of an electric device according to a second embodiment of the present invention in an axial direction and a radial direction. 1 that are the same as those in FIG. 2 indicate the same or corresponding parts. In FIG.
9a is an axial portion of the spacer 9, and 9b is a radial portion of the spacer 9. Further, the entire configuration of the winding of the electric device according to the second embodiment of the present invention is similar to that of the first embodiment shown in FIG. 1, and the spacer 5 in FIG. 1 is replaced with a spacer 9.

In FIG. 5, the spacer 9 is formed by bending, for example, a flat press board as shown in FIG. 5 (a), and as shown in FIG. 5 (b), the spacer 9 is radially formed around the central axis of the winding. Many are placed in. The arrangement as shown in FIG. 5B can be performed, for example, by attaching spacers 9 to a paper tape at predetermined intervals and attaching the spacers to the barrier 2.

With such a structure, a space is created between the adjacent spacers 9, and the space between the axial portion 9a of the spacer 9 and the axial portion 9a of the adjacent spacer 9 forms a flow path in the axial direction of the cooling medium. And the radial portion 9 of the spacer 9
The space between b and the adjacent radial portion 9b of the spacer 9 forms a radial flow path of the cooling medium.

As described above, the cooling medium flows in the axial direction and the radial direction by natural convection through the flow path formed by the plurality of spacers 9, whereby the amount of heat generated from the windings in each section is transferred by heat transfer. Since it can be effectively taken away, the entire winding can be effectively cooled.
Therefore, it is possible to realize a winding of an electric device having an excellent cooling characteristic and a high winding space factor.

Embodiment 3. FIG. 6 is an axial cross-sectional view showing a structure of a winding wire of an electric device according to a third embodiment of the present invention, and the same reference numerals as those in FIG. 1 of the first embodiment indicate the same or corresponding portions. In FIG. 6, 6a is a gap between the coated electric wires 1, 10 is an axial direction of a cooling medium flow path (not shown), and 60 ° with respect to the direction in which the cooling medium flows in the axial direction.
The spacers 11a provided in the direction of the cooling medium are formed in the direction of the cooling medium flowing in the direction of the axial direction of the cooling medium at an angle of 60 °. , Arrow D indicates the direction in which a cooling medium (not shown) flows.

As a winding procedure, first, a spacer 5 having a flow path of a cooling medium provided in the axial direction and the radial direction is provided on the barrier 2 of the first section S1. From the 1st turn as the 1st layer of the bottom layer, 2
Continue winding the 1st, 3rd, ~, and 7th turns.
Next, the 8th turn of the 2nd layer directly following the 1st layer is wound between the 6th turn and the 7th turn of the 1st layer on the winding of the 1st layer. The first section S1 is formed by a winding method called so-called bale winding (or 60 ° winding) in which the eyes are wound between the 5th and 6th turns of the first layer.
Do the winding inside. Next, in the second section S2, the cooling medium flow path is bale-wound on the spacer 10 provided in the axial direction and in the direction forming an angle of 60 ° with respect to the flowing direction of the cooling medium. Do the winding. The following sections are also wrapped in a bale to complete the entire winding.

In the structure of the winding wire shown in FIG. 6, the winding structure in the section is formed into a bale winding so that the gap 6a between the covered electric wires 1 becomes equal to the gap 6 between the covered electric wires 1 shown in FIG. Since it is smaller than the above, the winding space factor is further improved. Further, by using the spacer 10 in which the flow path of the cooling medium is provided in the axial direction and in the direction forming an angle of 60 ° with respect to the direction in which the cooling medium flows in the axial direction, the cooling medium as in the first embodiment is used. This is intended to further improve the cooling characteristics by increasing the flow velocity of the cooling medium as compared with the case of using the spacer 5 in which the flow path is provided in the axial direction and the radial direction. This increase in flow velocity can be realized because the bending loss in the flow from B to D in FIG. 6 is smaller than that in the flow from B to C in FIG. 1 and the like.

FIG. 7 shows an angle of 60 ° with respect to the axial direction of the cooling medium flow path in the winding of the electric device according to the third embodiment of the present invention and the direction in which the cooling medium flows in the axial direction. It is a figure which shows the structural example of the spacer 10 provided in the direction, and the code | symbol same as FIG. 6 and FIG. 2 of Embodiment 1 has shown the same or equivalent part. In FIG. 7, 10a is an opening, and 11b is 6 with respect to the direction in which the cooling medium flows in the axial direction.
It is a portion of the groove, which is a flow path of the cooling medium formed in the direction forming an angle of 0 °, on the downstream section side of the cooling medium. Such a spacer 10 can be manufactured by molding a corrugated press board, for example.

In the spacer 10 shown in FIG. 7, the cooling medium flows from the lower part of the winding along arrow B in FIG. 6 along the coated electric wire 1 side portion 7a of the groove which is a channel of the cooling medium formed in the axial direction. Along the upstream section side 11a of the cooling medium, which is a channel of the cooling medium that is formed in a direction that makes an angle of 60 ° with the direction in which the cooling medium flows in the upper direction of the winding by natural convection. Then, the cooling medium flows by natural convection from the inner circumference side of the winding to the outer circumference side of the winding as shown by arrow D in FIG. Further, the flow of the cooling medium along the barrier 2 side portion 7b of the groove, which is a channel of the cooling medium formed in the axial direction, forms the cooling medium in a direction forming an angle of 60 ° with respect to the axial direction. A flow of the cooling medium occurs along the downstream section side portion 11b of the cooling medium of the groove, which is the flow path of the cooled cooling medium.

The cooling operation of the winding by the cooling medium in FIGS. 6 and 7 is the same as in the first embodiment.

As described above, since the cooling medium flows in the axial direction and in the direction forming an angle of 60 ° with respect to the direction in which the cooling medium flows in the axial direction, the amount of heat generated from the winding in each section is reduced. Since it can be effectively taken away by heat transfer, the entire winding can be effectively cooled. Therefore, it is possible to realize a winding of an electric device having an excellent cooling characteristic and a high winding space factor. In particular, since the flow velocity of the cooling medium increases as described above, the entire winding can be cooled more effectively.

Fourth Embodiment FIG. 8 shows a structure of a spacer 12 which forms a flow path of a cooling medium in a winding wire of an electric device according to a fourth embodiment of the present invention in an axial direction and a direction forming an angle of 60 ° with respect to the axial direction. It is an explanatory diagram, and in the figure, the same reference numerals as those in FIG. 5 of the second embodiment indicate the same or corresponding portions. In FIG. 8, 12 a is an axial portion of the spacer 12, and 12 b is a portion forming an angle of 60 ° with the axial direction of the spacer 12. Moreover, the entire configuration of the winding of the electric device according to the fourth embodiment of the present invention is similar to that of the third embodiment shown in FIG.
Is replaced with a spacer 12.

In FIG. 8, the spacer 12 is formed by bending, for example, a flat press board as shown in FIG. 8A, and is radially formed around the central axis of the winding as shown in FIG. 8B. Many are placed in.

With this structure, a space is created between the adjacent spacers 12, and the axial portion 12 of the spacer 12 is formed.
The space between a and the axial portion 12a of the spacer 12 adjacent to each other forms a flow path in the axial direction of the cooling medium, and the axis of the spacer 12 adjacent to the portion 12b forming an angle of 60 ° with respect to the axial direction of the spacer 12 The space with the portion 12b forming an angle of 60 ° with respect to the direction forms a flow path in a direction forming an angle of 60 ° with respect to the axial direction of the cooling medium.

FIG. 9 shows a spacer 12 for forming a flow path of a cooling medium in a winding of an electric device according to a fourth embodiment of the present invention in the axial direction and in a direction forming an angle of 60 ° with respect to the axial direction. It is an explanatory view showing composition, and in the figure, arrow B is a direction where a cooling medium which is not illustrated flows in the axial direction.
The spacer 12 has an angle of 60 ° with respect to the direction B in which the cooling medium flows in the axial direction, as shown in FIG. 9A, depending on the bale winding structure. It can also be configured to have an angle of 120 ° with respect to the axial flow direction B.

As described above, the cooling medium flows in the axial direction and the direction forming an angle of 60 ° with respect to the axial direction by natural convection through the cooling medium flow path formed by the plurality of spacers 12. Since the amount of heat generated from the winding wire in each section can be effectively removed by heat transfer, the entire winding wire can be effectively cooled. Therefore, it is possible to realize a winding of an electric device having an excellent cooling characteristic and a high winding space factor.

[0055]

Since the winding of the electric device according to the present invention is configured as described above, in the winding of the electric device having an electrically insulating cooling medium such as an oil-filled transformer,
It is possible to obtain a winding wire of an electric device having an excellent cooling characteristic and a high winding space factor.

[Brief description of drawings]

FIG. 1 is an axial sectional view showing a structure of a winding wire of an electric device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration example of a spacer 5 in which a flow path of a cooling medium in a winding wire of an electric device according to a first embodiment of the present invention is provided in an axial direction and a radial direction.

FIG. 3 is an explanatory diagram of changes in the arrangement angle of the spacer 5 around the central axis of the winding in the winding of the electric device according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an example in which the shape of the spacer 5 in which the flow path of the cooling medium in the winding of the electric device according to Embodiment 1 of the present invention is provided in the axial direction and the radial direction is changed for each section. .

FIG. 5 is an explanatory diagram showing a configuration of a spacer 9 that forms a flow path of a cooling medium in a winding wire of an electric device according to a second embodiment of the present invention in an axial direction and a radial direction.

FIG. 6 is an axial cross-sectional view showing the configuration of windings of an electric device according to Embodiment 3 of the present invention.

FIG. 7 is a diagram showing a flow path of a cooling medium in a winding of an electric device according to a third embodiment of the present invention, which is provided in an axial direction and a direction forming an angle of 60 ° with respect to a direction in which the cooling medium flows in the axial direction. It is a figure which shows the structural example of the spacer 10 which did.

FIG. 8 shows a structure of a spacer 12 which forms a flow path of a cooling medium in a winding wire of an electric device according to a fourth embodiment of the present invention in an axial direction and a direction forming an angle of 60 ° with respect to the axial direction. FIG.

FIG. 9 shows a structure of a spacer 12 that forms a flow path of a cooling medium in a winding wire of an electric device according to a fourth embodiment of the present invention in an axial direction and a direction forming an angle of 60 ° with respect to the axial direction. FIG.

FIG. 10 is an axial cross-sectional view showing a general configuration example of a winding of an electric device adopting a conventional multi-section cylindrical winding structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Coated electric wire, 2 Barrier, 5 Spacer which provided the flow path of a cooling medium in the axial direction and the radial direction, 7a The coated electric wire 1 side part of the groove which is a flow path of the cooling medium formed in the axial direction, 7a
b 2 a part of the groove which is a channel of the cooling medium formed in the axial direction on the barrier 2 side, 8 a a part of the groove which is a channel of the cooling medium formed in the radial direction on the upstream section side of the cooling medium, 8 b
A portion of the groove, which is a channel for the cooling medium formed in the radial direction, on the downstream section side of the cooling medium, 9 A spacer for forming the channel for the cooling medium in the axial direction and the radial direction, 9a A spacer 9
Axial portion, 9b radial portion of the spacer 9,
Spacers provided in the flow path of the cooling medium in the axial direction and in a direction forming an angle of 60 ° with respect to the direction in which the cooling medium flows in the axial direction, 11a An angle of 60 ° in the direction in which the cooling medium flows in the axial direction The upstream section side of the cooling medium of the groove, which is the flow path of the cooling medium formed in the direction that forms
The downstream section side of the cooling medium of the groove, which is the channel of the cooling medium formed in the direction forming an angle of 60 ° with respect to the direction in which the cooling medium flows in the axial direction, 12 A spacer formed in a direction forming an angle of 60 ° with respect to the axial direction, an axial portion of the spacer 12a, a portion forming an angle of 60 ° with respect to the axial direction of the spacer 12b, a central axis of the winding A (axis Direction), B, C, D
Direction of cooling medium flow, S1 first section, S2
Second section, S3 Third section.

Claims (7)

[Claims] 1. A winding of an electric device having a multi-section cylindrical winding structure, characterized in that the section is provided with a spacer provided with a flow path of an electrically insulating cooling medium in an axial direction and a radial direction. Winding of electrical equipment. 2. A winding of an electric device having a multi-section bale winding structure, wherein the section is 60 ° with respect to an axial direction of a flow path of an electrically insulating cooling medium and a direction in which the cooling medium flows in the axial direction. A winding of an electric device comprising a spacer provided in a direction forming an angle. 3. The winding of an electric device according to claim 1, wherein the spacer is provided with grooves forming a flow path of a cooling medium on a front surface and a back surface thereof. 4. The arrangement angle of the spacer around the central axis of the winding is changed between adjacent sections so that the cooling medium flows in the grooves on the front surface and the back surface of the spacer. The winding of the electric device described in 3. 5. The winding of an electric device according to claim 3, wherein the shape of the spacer is changed between adjacent sections so that the cooling medium flows in the grooves on the front surface and the back surface of the spacer. . 6. A winding of an electric device having a multi-section cylindrical winding structure, wherein the section is provided with a plurality of spacers that form a flow path of an electrically insulating cooling medium in an axial direction and a radial direction. And winding of electrical equipment. 7. In a winding of an electric device having a multi-section bale winding structure, a flow path of an electrically insulating cooling medium is formed in the section in an axial direction and a direction forming an angle of 60 ° with respect to the axial direction. A winding of an electric device, comprising a plurality of spacers.