JPH051969Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a winding of a high-voltage rotating electric machine, and more particularly to a mounting structure for a semiconducting member that is attached to a core groove of a winding to equalize its surface potential.

[Conventional technology]

As conventional structures of this type, those shown in FIGS. 3 and 4 are widely known. In the figure, 1 is a tortoise-shell-shaped wire loop piece as a winding wire, which is a ring-shaped conductor wrapped with an insulating tape capable of withstanding the working voltage, and 2 is a straight line located in the core groove (not shown) of this wire loop piece 1. 3 is a semiconducting sheet 2 which is a first semiconducting member that makes the surface potential uniform, and is wrapped around the semiconductive sheet 2.
This presser tape 3 is wrapped around the wire ring piece 1 so as to form a gap l at a predetermined interval so that the semiconductive sheet 2 comes into direct contact with the core groove. It is done like this. 4 is a surface tape located at the outer end of the wire ring piece 1 of the presser tape 3. A semiconductive resin layer 5 is a second semiconductive member that is applied from a gap formed at the outer end of the semiconductive sheet 2 to the surface tape 4 at the outer end of the wire ring piece 1.

In order to manufacture a device having the above configuration, first, the semiconductive sheet 2 is wrapped around the coil piece 1, which is a conductor wrapped with insulating tape. In order to fix the semiconductive sheet 2, a presser tape 3 is further wound around the surface of the semiconductive sheet 2 at predetermined intervals to form a gap 1 as shown in the figure. This presser tape 3 is continuously wound around the outer end of the wire loop piece 1 as a surface tape 4. Particularly, a semiconductive resin layer 5 is applied to a portion of the wire ring piece 1 extending from the straight portion to the bent portion as shown in an enlarged view in FIG. As a result, the electric field at the end of the wire ring piece 1 is relaxed, thereby suppressing partial discharge at that part.

[Problem that the invention attempts to solve]

Since the conventional wire loop piece 1 is constructed as described above, the lap portion between the semiconductive sheet 2 and the semiconductive resin layer 5 has a sufficient electrical contact area between the two due to the presence of the presser tape 3. Therefore, the problem was that the original role of mitigating the electric field in this region could not be fully exerted.

This idea was made in order to solve the above-mentioned problems, and it makes complete electrical contact between the semiconducting sheet 2 and the semiconducting resin layer 5, sufficiently relaxing the electric field, and effectively suppressing partial discharge. The purpose is to

[Means for solving problems]

This invention includes an annular conductor covered with an insulating coating that is installed in a core groove of a high-voltage rotating electrical machine, a first semiconducting member that is attached to the groove position of the annular conductor, and a first semiconducting member that is attached to the groove of the annular conductor. a first adhesive band attached at a predetermined interval to an area other than both outer ends of the first semiconductive member to be fixed to the annular conductor;
an adhesive member that adhesively fixes both outer ends of the semiconductive member to the annular conductor; and a second adhesive member that is attached at a predetermined interval to an area of the annular conductor excluding the area where the first semiconductive member is attached. The device includes an adhesive member, and a second semiconductive member that covers the outer end of the first semiconductive member and the outer end of the annular conductor.

[Effect]

According to this invention, electrical contact between the first semiconducting member and the second semiconducting member can be made complete;
The electric field is sufficiently relaxed at the outer end of the annular conductor, and partial discharge at this location can be effectively suppressed.

〔Example〕

Hereinafter, based on the embodiment shown in FIGS. 1 and 2, the features of this invention will be mainly explained, with the same or corresponding parts as those of the conventional device being designated by the same reference numerals. According to the same figure,
The holding tape 3, which is the first adhesive band for fixing the semiconductive sheet 2, is wrapped around the wire ring piece 1 with both outer ends of the direct part left intact, and the bent part of the outer end of the wire ring piece 1 is
A presser tape 3 and the same tape are wrapped as a surface tape 4, which is a second adhesive band, from a position a little apart from the end of the semiconductive sheet 2. However, since the ends of the semiconductive sheet 2 are not fixed by the presser tape 3, this fixation is not sufficient, and therefore the double-sided adhesive tape 6, which is the adhesive member, is not fixed.
The semiconducting sheet 2 is directly adhered and fixed to the insulating tape of the wire ring piece 1 using a . After the semiconductive sheet 2 is sufficiently exposed and fixed in this manner, a semiconductive resin layer 5 is applied to the end portion thereof as in the conventional manner. With this configuration, it is possible to ensure sufficient electrical contact between the semiconductive sheet 2 and the semiconductive resin layer 5, so that the electric field at the end of the wire ring piece 1 can be relaxed more effectively than before. Therefore, partial discharge in this region can be suppressed more effectively.

In the above embodiment, the double-sided adhesive tape 6 was used to fix the ends of the semiconductive sheet 2, but other methods may be used as long as this part of the semiconductive sheet 2 can be fixed to the coil piece 1. It goes without saying that adhesive means may also be used.

[Effect of idea]

As described above, according to this invention, an annular conductor coated with an insulating coating is installed in a core groove of a high-voltage rotating electric machine, a first semiconducting member is attached to the groove position of the annular conductor, and the first semiconducting member is provided. a first adhesive band affixed at a predetermined interval to an area other than both outer ends of the first semiconducting member to fix it to the annular conductor; and both outer ends of the first semiconducting member. a second adhesive member that is attached at a predetermined interval to an area of the annular conductor excluding the area where the first semiconducting member is attached; Since the second semiconductive member is coated from the outer end of the semiconductive member to the outer end of the annular conductor, good electrical contact is made between the first semiconductive member and the second semiconductive member. Therefore, the relaxation of the electric field in this portion can be improved and partial discharge can be more effectively prevented.

[Brief explanation of the drawing]

Figure 1 is an overall perspective view showing the structure of the wire ring according to this invention, Figure 2 is an enlarged view of its main parts, Figure 3 is a view equivalent to Figure 1 showing a conventional wire ring, and Figure 4 is an enlarged view of the main part. This is a diagram corresponding to Figure 2. In the figure, 1 is a wire loop piece (conductor), 2 is a semiconductive sheet (first semiconductive member), 3 is a presser tape (first adhesive band), 4 is a surface tape (second adhesive band), 5 6 is a semiconductive resin layer (second semiconductive member), and 6 is a double-sided adhesive tape (adhesive member). In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] (1) An insulated annular conductor installed in a core groove of a high-voltage rotating electric machine, a first semiconducting member attached to the groove position of the annular conductor, and a first semiconductor member attached to the groove position of the annular conductor; 1
the first to fix the semiconducting member to the annular conductor;
a first adhesive band attached at a predetermined interval to an area other than both outer ends of the semiconductive member; and an adhesive member for adhesively fixing both outer ends of the first semiconductive member to the annular conductor. , a second adhesive member attached at a predetermined interval to an area of the annular conductor excluding the area where the first semiconductive member is attached;
A winding wire for a high-voltage rotating electrical machine, comprising: a second semiconductive member covering the outer end of the annular conductor from the outer end of the semiconductive member. (2) The winding wire for a high-voltage rotating electric machine according to claim 1, wherein the adhesive member is a double-sided tape.