JPH1126253A - Electric apparatus coil and lead wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an electric apparatus coil to be improved in assembly workability and enhanced in cooling efficiency by a method wherein irregularities which are provided between adjacent members to ensure a coolant path are provided to a lead wire. SOLUTION: A lead wire 11 is equipped with irregular members 112 which are each W in width and t in thickness and fixed at an interval d to a conductor wound with an insulating tape. A part of width W is made protrudent, and another part of length d is made recessed. The lead wire 11 is equipped with the irregular members 112 which are formed and arranged so as to satisfy a formula, d<W or d>W, or the protrudent part and recessed part of the irregular members 112 are set different from each other in with and so selected as to produce a gap when they are fitted together, and a path of coolant 2 is ensured between the adjacent lead wires 2 without fail. A tape member is wound like spirals on the lead wire 2 in its lengthwise direction to serve as the irregular members 112.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil and a conductor used for an electric device, and more particularly to a coil and a conductor for an electric device with improved winding cooling efficiency.

[0002]

2. Description of the Related Art An electric device includes a coil for forming a magnetic circuit, an induction circuit, and the like. A coil used in an electric device such as a transformer generates a loss, and most of the coil is converted into heat, so that the temperature of the electric device including the coil increases. In order to prevent this temperature rise, a flow path for a cooling medium is provided in a coil for electric equipment. FIG. 7 shows a conventional coil for electric equipment using a cooling medium. FIG. 7A is a horizontal sectional view of the coil, and FIG. 7B is a vertical sectional view.

[0003] A conventional coil 1 'for electric equipment is composed of a conductor 11' formed by winding an arbitrary number of times in the coil axial direction and circumferential direction, and a duct for convection of a cooling medium 2 'between the conductors 11'. It has a forming duct piece 12 'and a cooling duct 13' in which a space to be a flow path is secured by the duct piece 12 ', and a cooling medium 2' flows through the cooling duct 13 '. At the time of manufacturing the coil 1 ', the operation of winding the conducting wire 11' and the operation of inserting and attaching the duct piece 12 'are repeated to secure a predetermined number of turns and the cooling duct 13'. In some cases, the cooling duct structure may not be provided inside the coil 1 '. Heat is generated when a current flows through the conductor 11 ′, and the heat is cooled by transferring heat to the cooling medium 2 ′ in the cooling duct 13 ′ and on the surface of the conductor 11 ′. The coil 1 'having no cooling duct 13' inside is cooled by heat transfer only from its surface.

It is also known that a coil of a superconducting rotary electric machine is formed by spirally winding spiral insulation around a superconducting wire and forming a cooling path in a gap between the spiral insulations (see, for example, Japanese Unexamined Patent Publication No. Hei. 133562).

[0005] In some cases, an insulating tape not fixed to the conductor is used as an electric insulating coating of the conductor in the conductor 11 'used for the coil 1'. In this case, when the conductor 11 'is cut, the insulation tape is removed. Since the conductive wire may be peeled off from the cut portion, it is necessary to take measures such as fixing the insulating tape at the cut portion with an adhesive tape or the like. This treatment led to deterioration of workability at the time of product production.

[0006]

The coil for electric equipment is
The temperature rises until the internal heat generation and the cooling action by the cooling medium reach an equilibrium state. In order to suppress the temperature rise, it is necessary to reduce the internal heat generation or increase the cooling efficiency. Examples of ways to reduce the internal heating value include reducing the resistance by increasing the cross-sectional area of the conductor, and using a low-resistance material for the conductor. Cause the rise. Examples of ways to increase the cooling efficiency include a method of expanding the duct space and expanding the flow path of the cooling medium, and a method of increasing the number of duct insertion points and increasing the area in contact with the cooling medium. As a result, assembling workability deteriorates, which leads to an increase in product price.

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned drawbacks, and greatly reduces or eliminates the number of duct pieces to be inserted into a coil, thereby reducing the number of coil parts and improving assembly workability. At the same time, an object of the present invention is to provide a coil for electric equipment in which cooling efficiency is greatly improved. Also, when using an insulating tape that is not fixed to the conductor as an electrical insulating coating of the conductor in the conductor used for the coil, it is not necessary to take measures such as fixing the insulation tape in the cut part of the conductor. It is to be.

[0008]

According to the present invention, there is provided a lead wire having an uneven member for securing a flow path of a cooling medium between adjacent members, wherein the uneven member is a lead wire attached to the conductive wire. is there.

Further, the present invention is the conductive wire, wherein the uneven member is attached to the conductive wire from above an insulating tape wound on the conductive wire portion.

According to the present invention, there is provided a conductive wire including a concave and convex member for securing a flow path of a cooling medium between adjacent members, wherein the concave and convex member guides a tape-shaped member having a different thickness in a tape width direction. This is a wire wound spirally on the wire in the length direction of the wire.

Further, the present invention relates to a lead wire having an uneven member for securing a flow path of a cooling medium between adjacent members, wherein the uneven member has a tape-like member having a different thickness in a tape length direction. The conductor is a spirally wound conductor on the conductor in the longitudinal direction of the conductor.

Further, the present invention is a conductive wire having a gap when the shape of the concave portion and the shape of the convex portion are fitted.

Further, the present invention is the conductive wire, wherein the concave and convex members have different widths of the concave portion and the convex portion.

Further, the present invention is a conductive wire in which the uneven member is formed of a convex member, and is provided with an interval of a width serving as a concave portion.

Further, according to the present invention, the uneven member is a conductive wire having a smooth outer surface.

According to the present invention, the uneven member is a conductive wire that is a thermocouple or a temperature sensor.

Further, the present invention relates to a coil for electric equipment provided with a conducting wire having a flow path of a cooling medium between adjacent members, wherein the conducting wire is the above-mentioned conducting wire.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described. Embodiments of a coil and a conductor for an electric device according to the present invention will be described with reference to FIGS. FIG. 1 shows one embodiment of a conductive wire used for a coil for electric equipment. As shown in the figure, the conductive wire 11 of this embodiment has a concavo-convex member 112 having a width W and a thickness t attached to a conductor portion wound with an insulating tape at a predetermined distance d. As the uneven member 112, in addition to the shape of the uneven member 112 having the concave portion and the convex portion, even if the uneven member 112 has only the convex portion, if the portion to be attached is selected, the portion where the uneven member is not attached is substantially It becomes a recess. In FIG. 1, a portion having a width W becomes a convex portion, while a portion having a predetermined distance d becomes a concave portion. The concavo-convex member 112 is mainly made of an insulating material. Is attached to the conductor portion 111 of the first embodiment. If it has electrical insulation performance, it is possible to use a conductive material such as a metal or a semiconductor material as the uneven member 112, and if a temperature sensor or the like using a thermocouple or a semiconductor is used,
The temperature of each part of the coil can be measured.

FIG. 2 shows an embodiment of the electric device coil 1 having the conductor 11. 2A is a horizontal sectional view of the coil and an enlarged explanatory view thereof, and FIG. 2B is a vertical sectional view of the coil and an explanatory view thereof. The electric device coil 1 includes a conductive wire 11, and the conductive wire 11 forms one block by being wound in n stages in the axial direction and m rows in the circumferential direction. When n = 1, it is a disc-shaped coil. Also,
An insulator 12 may be inserted between rows.

The number n of steps and the thickness t of the uneven member 112 must be selected so as not to hinder the flow of the cooling medium. When the member adjacent to the conductor 11 has a flat portion, the conductor 11
When the adjacent member also has an uneven portion, for example, when it is the same conductive wire 11, the concave and convex portions of the uneven member may have a gap even if they are fitted. In this case, the coil can be assembled without considering the positions of the concave and convex portions. When there is a case where a gap does not occur when fitted, it is necessary to assemble the coil in consideration of the positions of the concave and convex portions. With this configuration, the flow path 13 of the cooling medium 2 is secured between the conductive wires 11. In the duct space formed by the duct pieces according to the conventional method, it is necessary to take a sufficient vertical distance before the flow of the cooling medium develops into turbulent flow. A gap is formed between the conductive wire 11 and the vertical flow path, and the vertical flow path position is shifted for each stage, so that a turbulent flow is easily generated and the cooling effect can be greatly increased.

The conductor 11 shown in FIG. 1 may have d = W, but in particular d <W or d> W, that is, the uneven member 1
12, the width of the convex portion (W portion) and the width of the concave portion (d)
If the length of the cooling medium 2 is selected so as to have a gap even when fitted, a flow path of the cooling medium 2 can be always secured between the adjacent conductors 11. These methods can be used in combination with a conventional duct piece duct. In that case, the ducts are adjacent members.

Since the tape is used as the electric insulating coating of the conductor, the insulating tape is likely to be peeled off from the conductor at the end of the conductor, and it is necessary to take measures such as fixing the insulation tape with an adhesive tape or the like. there were. However, when the uneven member having the U-shaped cross section is caulked, the heat-shrinkable member is heated, or the like, and the uneven member is attached to the conductor from above the insulating tape wound on the conductor, the insulating tape is fixed. Therefore, peeling can be prevented, and workability can be greatly improved.

Next, a description will be given of another embodiment of the coil for electric equipment and the conductor according to the present invention. FIG. 3 shows the conductor 11 of the present embodiment. In this embodiment, a tape-shaped member is wound spirally in the length direction of the conductive wire as the uneven member 112. According to this method, the uneven member 112 can be easily provided on the conductive wire 11. The concavo-convex member 112 is a coil for electric equipment 1
It can be attached at the time of winding work. The thickness t of the tape member needs to be selected so as not to hinder the flow of the cooling medium 2 in the coil 1. If d <W or d> W is selected, the flow path of the cooling medium 2 can be reliably secured between the adjacent conductors 11.

FIG. 4 shows a specific example of a tape member which is the concave and convex member 112 used for the conductor 11 of this embodiment. The thickness of the tape member is different in the tape width direction, and the unevenness can be formed by winding the tape member around the conductive wire 11. The tape member forming the uneven portion does not need to have a special amount of change in the thickness in the width direction. In addition, even when d = 0, that is, when the gap between the adjacent tape member is 0 when the conductor 11 makes one round, the conductor 11 of the present embodiment has an uneven portion. Note that the thickness of the tape member may be different in the tape length direction, and the unevenness may be formed by winding the tape member around the conductive wire 11.

FIG. 5 shows an embodiment of a conductor using another tape member. The thickness of the tape member to be used changes in a tapered shape. By winding the tape member around the conductive wire 11, it is possible to provide an uneven portion. Also, d = 0
However, the same effects as in the other embodiments can be obtained.

FIG. 6 shows a conductor 11 according to another embodiment. An uneven portion is provided in advance on the conductor portion 111 of the conductive wire 11 and an insulating layer is provided on the surface thereof, whereby the uneven portion can be provided. The insulating layer may be coated with an enamel or the like, or may be formed of an insulating tape, and have the same effects as those of the other embodiments.

It is possible to use a member having a smooth outer surface, for example, a chamfered end, as the uneven member. For example, if a horn-shaped uneven member is used for a conductive wire used as a coil, there is a possibility that the horn-shaped uneven member may be rubbed and caught by an adjacent uneven member during a tightening operation during coil winding. However, the use of the concave-convex member whose end is chamfered does not cause rubbing or snagging with the adjacent concave-convex member, and does not reduce the efficiency of the tightening operation during coil winding.

[0028]

As described above, according to the present invention, the cooling efficiency is greatly improved by providing the coil and the conductor for electric equipment with the uneven portion for securing the flow path of the cooling medium between the adjacent members. It is possible to obtain a coil and a lead wire for an electric device, which are improved, the number of coil parts is reduced, and the assembling workability is improved.

[Brief description of the drawings]

FIG. 1 is a structural explanatory view of one embodiment of a conductor according to the present invention.

FIG. 2 is a structural explanatory view of one embodiment of a coil for electric equipment of the present invention.

FIG. 3 is a structural explanatory view of one embodiment of a conductor according to the present invention.

FIG. 4 is a structural explanatory view of one embodiment of a conductor according to the present invention.

FIG. 5 is a structural explanatory view of one embodiment of a conductor according to the present invention.

FIG. 6 is a structural explanatory view of an embodiment of a conductor according to the present invention.

FIG. 7 is an explanatory view showing a configuration of a conventional electric device coil.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric equipment coil 11 Conductor 111 Conductor conductor 112 Concavo-convex member 12 Insulator 13 Flow path 2 Coolant

Claims (10)

[Claims] 1. A conductive wire having an uneven member for securing a flow path of a cooling medium between adjacent members, wherein the uneven member is attached to the conductive wire. 2. The conducting wire according to claim 1, wherein the uneven member is attached to the conducting wire from above an insulating tape wound on the conducting wire portion. 3. A conductive wire including an uneven member for securing a flow path of a cooling medium between adjacent members, wherein the uneven member has a tape-shaped member having a different thickness in a tape width direction, and a conductive wire length on the conductive wire. A conductive wire characterized by being spirally wound in a vertical direction. 4. A conductive wire having an uneven member for securing a flow path of a cooling medium between adjacent members, wherein the uneven member has a tape-shaped member having a different thickness in a tape length direction on the conductive wire. A conductive wire characterized by being spirally wound in the length direction. 5. The conductive wire according to claim 1, wherein the concave and convex member has a gap when the shape of the concave portion and the shape of the convex portion are fitted. . 6. The conductive wire according to claim 5, wherein the concave and convex members have different widths of a concave portion and a convex portion. 7. The conductive wire according to claim 5, wherein the uneven member is formed of a convex member, and is provided with an interval of a width serving as a concave portion. 8. The conductive wire according to claim 1, wherein an outer surface of the uneven member is smooth. 9. The conductive wire according to claim 1, wherein the uneven member is a thermocouple or a temperature sensor. 10. A coil for an electric device comprising a conductor which is a flow path of a cooling medium between adjacent members, wherein the conductor is the conductor according to any one of claims 1 to 9. A coil for electric equipment characterized by the above-mentioned.