JPS62152352A - Insulation treatment of rotary electric machine winding - Google Patents

Abstract

PURPOSE:To control external flow of resin impregnated in a core slot portion and to improve insulation characteristics by arranging synthetic fiber material readily saturating impregnated resin and having good resin maintainability in a gap between the coil corner and core slot portions. CONSTITUTION:Synthetic fiber material 12 easily impregnated with immersion of resin and having good resin maintainability is arranged in a gap between the core slot potion 2 of a rotary machine winding and the coil corner portion 11 of coils 3, 4 which are them inserted into a core slot portion 2. After the winding work of coils 3, 4 inserted into the core slot portion 2 has been completed subsequently, the whole winding is impregnated with resin and the impregnated resin is subject to setting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for insulating windings of a rotating electric machine.

[Prior Art] Fig. 2 is a sectional view of a core slot portion of a conventional rotating electrical machine winding into which a coil is inserted, in which (1) is the core, (2)
is the core slot portion into which the coil is inserted, <3) is the lower coil inserted into the core slot portion (2), (4) is the upper coil as well, and (5) is the lower coil (3) and the upper coil. The separator inserted between the coils (4), (6) the liner placed on the upper coil (4), (7) the lower coil coil 3) inserted into the core slot part (2), and the upper Locoilk 4), separator (5), and liner (6)
Wedge for fixing (8) is the lower end coil (3)
and the cable conductor constituting the upper end coil, (9) is the wire insulation layer of the wire conductor (8), (10) is the main insulation layer of the wire conductor (8), (11> is the lower end coil ( 3) and upper mouth coil (4
) is the coil corner part.

The core slot portion of a conventional rotating electrical machine winding is configured as described above, and when insulating it, the lower coil (3), upper coil (4), etc. are inserted into the core slot portion (2). At this time, nothing special was done in the gap between the coil corner part (11) and the core slot part (2).Next, the lower end coil (3) and the upper end coil (3) were inserted into the core slot part (2). After carrying out the winding work of 4), the entire winding wire was impregnated with an impregnating resin under vacuum pressure, and then the impregnated resin was dried.

[Problems to be Solved by the Invention] In the method for insulating the windings of a rotating electric machine as described above, a gap exists between the coil corner portion (11) and the core slot portion (2), and the vacuum of the resin There is a problem in that the impregnated resin flows out of the core slot portion along this gap after pressure impregnation and during drying of the impregnated resin.

This invention was made to solve these problems, and is a rotating electric machine winding that suppresses the resin impregnated in the core slot portion from flowing out, ensures a homogeneous coil insulation layer, and improves insulation properties. The purpose is to obtain a method for insulating wires.

[Means for Solving the Problems] The insulating treatment method for rotating electric machine windings according to the present invention includes impregnating the gap between the coil corner portion and the core slot portion when the coil is inserted into the core slot portion of the rotating electric machine winding. It is made of synthetic fiber material that is easily impregnated with resin and has good resin retention properties.

[Function] In this invention, the synthetic fiber material disposed in the gap between the coil corner part and the core slot part is impregnated into the coil insulation part, that is, the main insulation layer, in order to fill this gap and retain the impregnated resin. The external outflow path of the resin is blocked, and the resin impregnated in the core slot portion is suppressed from flowing out to the outside.

[Embodiment] FIG. 1 is a sectional view showing a core slot portion of a rotating electric machine winding according to the present invention, and (1) to (11) are completely the same as those in the conventional core slot portion.

(12) is a synthetic fiber material, such as prepreg polyester felt, which is arranged in the gap between the coil corner part (11) and the core slot part (2), and which is easily impregnated with the impregnated resin and has good resin retention properties, and is made of a carboxylic acid metal salt. This prepreg is impregnated with a curing catalyst for impregnated IM resin, which is mainly composed of: As the carboxylic acid metal salt, various zinc-based carboxylates can be used.

Insulating the rotating electric machine winding configured as described above is performed by lowering the prepreg polyester felt (IZ) when inserting the lower coil (3) and upper coil (4) into the core slot section (2). Mouth coil (3) and upper mouth coil (4
) coil corner part (11) and core slot part (2
) Next, the core slot part (2
) The lower end coil (3) and the upper end coil (4) inserted into the coil are wound, the entire winding is vacuum impregnated with a resin such as an epoxy resin, and the impregnated resin is dried.

The prepreg polyester felt (12) arranged as described above holds the resin impregnated in the gap between the coil corner part (11) and the core slot part (2),
Prepreg polyester felt during drying process (12)
The curing reaction of the resin is promoted by the curing catalyst impregnated in the coil insulating part, that is, the main insulating layer (10).
2) It is possible to suppress the resin impregnated with the resin from flowing out to the outside.

In the above example, polyester felt was used as the prepreg material, but other synthetic fiber materials can also be used as long as they are easily impregnated with resin and have good resin retention properties, such as Nomex. Felt (trade name, DuPont, USA) or polyester felt can be suitably used. In addition, as a resin impregnation treatment method, the vacuum pressure impregnation treatment method was described;
The same applies to resin immersion treatment methods.

[Effects of the Invention] As explained above, the present invention arranges a synthetic fiber material that is easily impregnated with impregnated resin and has good resin retention property in the gap between the core slot portion of the rotating electric machine winding and the coil corner portion of the coil. After completing the winding work of the coil inserted into the core slot, the entire winding is impregnated with resin and the impregnated resin is cured. This has the effect of accelerating the reaction, suppressing the impregnated resin from flowing out of the core slot, ensuring a homogeneous coil insulation layer, and further improving the insulation properties. It also has the effect of improving the adhesion between the outermost coil insulator and the core.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a core slot portion of a rotating electric machine winding according to the present invention, and FIG. 2 is a sectional view of a core slot portion of a conventional rotating electric machine winding. In the figure, 1) is the core, (2) is the core slot, (3) is the lower coil, (4) is the upper coil, and (5) is the lower coil.
is a separator, (6> is a liner, (7) is a wedge,
(8) is a wire conductor, (9) is a wire insulation layer, (10) is a main insulation layer, 11) is a coil corner portion, and (12) is a synthetic fiber material. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (7)

[Claims] (1) In the gap between the core slot part of the rotating electrical machine winding and the coil corner part of the coil, a synthetic fiber material that is easily penetrated by the impregnated resin and has good resin retention properties is placed, and the coil is inserted into the core slot part. Then, after completing the winding work of the coil inserted into the core slot portion, the entire winding is impregnated with resin, and the impregnated resin is cured. . (2) The rotating electric machine winding according to claim 1, wherein the synthetic fiber material is a prepreg polyester felt impregnated with a curing catalyst for impregnated resin mainly composed of carboxylic acid metal salts. How to insulate wires. (3) The method for insulating the windings of a rotating electric machine according to claim 1, wherein the Imanari fiber material is Nomex felt. (4) The method for insulating a winding of a rotating electric machine according to claim 1, wherein the synthetic fiber material is polyester felt. (5) The method for insulating a rotating electric machine winding according to any one of claims 1 to 4, wherein the resin is an epoxy resin. (6) A method for insulating a rotating electric machine winding according to any one of claims 1 to 5, wherein the resin is subjected to vacuum pressure impregnation treatment. (7) A method for insulating a rotating electric machine winding according to any one of claims 1 to 5, wherein the resin is subjected to a dipping treatment.