JPS5843166A - Coil for high voltage rotary electric machine - Google Patents

Abstract

PURPOSE:To improve the insulating property of a coil for a high voltage rotary electric machine by forming a coating for preventing resin from dropping to the part except a core inserting part of a coil coated with a ground insulator of a hexagonal insulator coated wire. CONSTITUTION:Strands are bundled in an elliptical shape, varnish is filled, is then thermally hardened, is formed in a hexagonal shape, and is insulated between layers as an insulator coated wire. A mica tape or the like is wound on the wire, thereby forming a ground insulator. This wire is inserted into a slot of an armature core, and a coating for preventing resin such as adhesive varnish or paint from dropping to the entire coil end or to the coil end at the opposite side of a lead wire. Accordingly, an integral immersion type is performed, thereby preventing the resin once immersed in the coil from flowing out during hardening the resin to eliminate an air gap produced in the coil and improving the insulating property of the coil.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to windings of high-voltage rotating electric machines, and the present invention relates to windings of high-voltage rotating electric machines, and uses an integral impregnation method to prevent resin impregnated inside the windings from flowing out.
4! The winding a installed in a general ILC rotating electrical machine is coated with an enamel insulating film, and is rolled into a large number of oval shapes, and this heel is filled with varnish, resin, etc. This is heated and cured, formed into a tortoiseshell shape, and then subjected to interlayer insulation I&, and ground insulation is provided by wrapping mica tape, glass tape, etc. around the outermost periphery of this insulating coating 1, resulting in a carp A. There is an integrated impregnation method ecs I-VB, which is inserted into the slot provided in the iron core of the rotor in the t-m stator, and then the whole is immersed in a wood ltd tube in the shape of a transfer and hardened by heating. As a result, the winding is attached integrally with the iron core.

However, in this integral impregnation method, the resin inside the coil that has been impregnated may flow out during the heat curing of the resin. Especially from the side part of the coil that is inserted into the slot. It was found that the resin leakage from the coil end part protruding from the slot and from Hiji 1 was significant, whereas the resin leakage was not that great.

As a result, after the integral impregnation treatment, voids are created in the coil.If a high voltage is applied to the coil with these voids present, partial discharge will occur and the insulation properties will deteriorate. In view of the above-mentioned drawbacks, the present invention aims to provide a winding cord for high-voltage rotating electric machines that has improved insulation properties.

In order to achieve such a target sound, the present invention includes applying a resin drip-preventing coating to the whole or part of the part other than the core insertion part of the coil, which is made of a tortoiseshell-shaped insulated wire and insulated to the ground. Here, the present invention will be described in detail. The material is rolled into an oval shape and filled with a festival or resin, heated and hardened, and formed into a tortoise shell shape, and then insulation between the eyebrows is applied. It is applied to make the skin covered with electricity.
This extremely fine skin has an electrical connection! Apply ground insulation by wrapping squid tape or glass tape.

In this coil with ground insulation, for example, the coil end part (exposed part) that is inserted into the slot of the iron core of an armature, for example, the coil end, the lead S part, for example, the anti-low side coil end. , Apply a coating to prevent resin from dripping, such as an adhesive face or paint.

This coating is applied in stripes over the entire exposed portion as described above, which is perfect for preventing dripping, but depending on the orientation of the coil during impregnation, it is not necessary to apply it over the entire exposed portion. For example, in the case of heating and curing as shown in FIG. 1, even if the coating is applied only to the sunrise side, the drop of the resin can be largely prevented compared to the conventional method. '1 and 2 are sunrise.

Mae, anti-sunrise only:! - If a meeting is held, 1
As shown in s2, when the tortoiseshell-shaped coil 1 is directly placed and impregnated and cured by heating, the resin will not drip and spread. If there is no coating, the dashed line is the case without coating.

As a coating for the exposed part, do not use it on the side of the Hirota exit line.
Regardless of whether booting is applied to the OIS portion, such as the Kuchide-Yu coil end, Kuchide So, or a combination of these, there is definitely less dripping compared to the conventional OJ'. You are free to choose between hardening 1'' or al*, which improves work efficiency.
&h73 method. After coating, insert the coil tube into the iron core, connect the wires, and
It is amazing that aaIl has no dielectric corrosion properties, and that the core and coil are integrally impregnated in a resin tube under vacuum and then cured by heating.

As explained in the examples above, according to the Zero-Hatsu I14, there is no void inside the coil due to the coating applied to the tube coil to prevent resin from dripping (the insulation properties are significantly improved compared to the conventional one). Gataki 9.

[Brief explanation of the drawing]

Figures 1 and 2 are state diagrams showing two examples of coil postures during resin impregnation, and Figures t & 3 are tag J-1 characteristic** diagrams. In the drawings, lll1 coil and 2tjq outgoing wires. Patent applicant Meiden Shayo Co., Ltd. Patent attorney Shibu Mitsuishi (1 other person)

Claims (1)

[Claims] Nine high-voltage rotating electrical machinery windings with a coating to prevent tree layer dripping.