JPS62135241A - Method for insulating winding of rotary electric machine - Google Patents

Abstract

PURPOSE:To prevent impregnated resin from flowing out of a main insulation layer, by coating the surfaces of the coil of the winding of a rotary electric machine, a series joint section, an interpole joint section, and a phase ring section, with curing catalyst solution for the impregnated resin. CONSTITUTION:The insulated coil 1 of the winding of a rotary electric machine, a series joint section 14, an interpole joint section 15, and a phase ring section 16 are integrated with a core 11, and are vacuum-pressure-impregnated with resin. After that, the whole surface of the insulation layer of the winding including the coil 1 impregnated with resin, the series joint section 14, the interpole joint section 15, and the phase ring section 16 is coated with curing catalyst solution for the impregnated resin. After that, the winding of the rotary electric machine is put into a drying furnace, and the impregnated resin is cured and dried. As a result, the impregnated resin can be prevented from flowing out of a main insulation layer, and resin can be prevented from leaking through an outermost insulation layer.

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. 1 is a partial cross-sectional view of a coil for a rotating electric machine insulated according to an embodiment of the present invention, and Fig. 4 is a diagram showing a winding of a rotating electric machine in which the coil of Fig. 1 is wound. Although it is a schematic diagram, the configuration of a conventional rotating electric machine coil and a wound rotating electric machine winding is the same as that according to the present invention, so the conventional technology will be explained with reference to these drawings.

In Fig. 1, (1) is a coil, which includes a coil straight section (2), a coil end section (3), a coil nose section (4), a coil lead section (5), and a coil conductor unit (6). , and a main insulating layer (7). Figures 2 and 3 are a cross-sectional view of the coil straight part and a cross-sectional view of the coil end part in Figure 1, respectively.
9) is provided with wire insulation (10), and this wire conductor 9) has a main insulation layer (7) and a glass tape (8).
) is formed.

In Fig. 4, the coil (1) is housed in the core (11), the spacing piece (12), the place ring (13), the series joint part (14), the pole joint part <15), and the phase ring part <16L. A support arm (17) and a marking line (18) are provided. 50, FIG. 6, and FIG. 7 are a cross-sectional view of the series joint part, a cross-sectional view of the pole joint part, and a cross-sectional view of the 1q phase ring of the winding shown in FIG. 4, respectively. In these figures,
The main gun IL layer (19) and (
20) is formed.

(The current method for insulating the windings of rotating electrical machines involves forming a coil conductor unit (6) of the rotating electrical machine winding, and then surrounding this coil conductor unit (6) with a main insulating layer mainly made of mica tape. (7) is formed.The formed main insulating layer <7
) is wound with an untreated glass tape (8) as a bind tape once or twice in a half-fold winding method or an end-fold winding method. Next, the insulating taped coil (1) is placed in the core (11), and the three operations of the winding 11 are performed. Coil (1
), the series joint part (14〉), the pole joint part (15), and the phase ring part (IG) are insulated using an insulating layer mainly made of mica tape.
9>, (20), and (Zl) at the series joint part (14
), and an untreated glass tape (8) is wound around the surface thereof as an insulating outermost layer once or twice in a half-fold winding method or an end-fold winding method. The thus insulated rotating electrical machine winding is integrally immersed in resin with the core (11) for three times under vacuum pressure and placed directly in a drying oven, where the impregnated resin is hardened and dried.

[Problems to be Solved by the Invention] A conventional method for insulating rotating electric machine windings involves forming an insulating layer on the coils, series joints, pole joints, and phase ring parts of the rotating electric machine windings, and Since the rotating electric machine windings were placed in a drying oven as they were and the resin was cured, the coils, series joints, pole joints, and phase ring parts were damaged during drying. There was a problem in that the resin impregnated in the mica tape insulating layer leaked out to the outside, creating voids in the insulating layer after drying, making it difficult to obtain a homogeneous layer.

This invention was made in order to solve such problems, and when the resin is vacuum impregnated and then dried, the resin impregnated in the main insulating layer leaks out and the resin in the outermost insulating layer leaks. This prevents voids from forming in the main insulation layer.
The object of the present invention is to obtain a method of insulating a winding of a rotary machine by which a homogeneous insulating layer can be formed.

[Means for Solving Problems] In the insulating treatment method for rotating electric machine windings according to the present invention, an insulating layer is formed, +! A curing catalyst solution for impregnated resin is applied to the coils, series joints, pole joints, and phase ring parts of a rotating electric machine winding impregnated with I fat.

[For Lft] In this invention, a curing catalyst solution for impregnated resin is applied to the coil, series joint, pole joint, and phase ring part surfaces of the rotating electric machine winding on which an insulating layer is formed and resin is impregnated. As a result, during the curing reaction of the rotating TL machine winding impregnated with resin, the curing reaction of the resin on the surface of the insulating layer coated with the catalyst solution is accelerated, and the insulating layer on the surface that hardens quickly causes the main insulating layer to It is possible to suppress leakage and outflow of the impregnated resin, and it is possible to obtain a homogeneous insulating layer without creating voids in the main insulating layer.

Embodiment] FIGS. 1 to 7 are cross-sectional views showing an embodiment of the present invention.
Figure 4 is a schematic diagram), (1) to (7), (9) to (
21) is the same as that of the above-mentioned conventional rotating electric machine coil and wound rotating electric machine winding. In the method of insulating a rotating electric machine winding according to the present invention, after forming a coil conductor unit (6) of a rotating electric machine winding, this coil conductor unit (6) is
A main insulating layer (7) mainly made of mica tape is formed around the main insulating layer (7). This insulating daping is then applied to the surface of the formed main insulating layer (7) by winding the untreated glass tape (8) as a bind tape one to two times in a half-fold wrapping method or an end-fold wrapping method. The coil (1) thus prepared is placed in the core (11), and winding work is carried out. The insulation of the series joint part (14), the pole joint part (15), and the phase ring part (1G) is as follows:
Similar to the above, the insulating layer is mainly made of mica tape.
The insulating layers (19), (20), and (21) are formed around the girth joint, etc., and an untreated glass tape (8) is applied to the surface as the outermost insulating layer using a half-wrap method or an end-wrap method. Wind it 1 to 2 times using a winding method.

Coil of rotating electric machine winding insulated in this way (1)
, the series joint part (14), the pole joint part (15), and the phase ring part (16) are integrally formed with the core (11) and made of resin (
Resin) is vacuum JJII pressure impregnated. Next, the entire surface of the insulating layer of the winding including the coil (1), series joint part (14), pole joint part (15), and phase ring part (16) impregnated with resin is coated with, for example, epoxy resin. A solution M in which Epicoat 1001 (trade name of Shell Co., Ltd.) and a carboxylic acid metal salt are dissolved in a mixed solvent of acetone and toluene is applied. As the carboxylic acid metal salt, for example, various carboxylic acid salts of sub-5;) series can be used.

After soaking, the rotating electrical machine windings are placed in a drying oven, and the impregnated resin is hardened and dried. At this time, the hardening reaction of the resin on the surface of the insulating layer coated with the solution is promoted, and the resin on the surface of the insulating layer hardens first, forming a resin shell. This shell can prevent the resin impregnated in the mica tape layer of the coil (1), series joint (14), pole joint (15), and phase ring part (16) from flowing out. , voids in the main insulating layer are less likely to occur, and a homogeneous insulating layer can be obtained.

In the above example, Micachy γ is used for the main insulating layer, but /-Menx (trade name of DuPont, USA, heat-resistant polyamide paper made from heat-resistant polyamide resin)
It can also be applied to rotating electric machine windings using tapes or sheets. In addition to the above-mentioned impregnating resins, epoxy resins such as p pon828 (product name of shell ratio) and acid anhydride hard 1
A mixture of I-IN 2200 (trade name, Hitachi Chemical Co., Ltd.) can also be used as a detergent. Moreover, although the present invention is applied to the windings that have been completely impregnated in the above, it can be similarly applied to a single coil vacuum impregnated coil or a 91-coil immersion coil.

[Effects of the Invention] As explained above, the present invention provides for the coil of the rotating electrical machine winding, the series binding part of the coil, the pole m-th 1t joint part, and the phase ring part during construction. After insulating the entire coil and completing the winding work, the coil is impregnated with resin, and then a curing catalyst solution for the impregnated resin is applied to the surfaces of the coil, the Gillies joint, the pole joint, and the phase ring. By drying the impregnated resin with hard carbon after coating, it is possible to prevent the resin impregnated in the main insulating layer from leaking out and the resin in the outermost insulation layer, and to prevent the formation of voids in the main insulating layer. This has the effect of forming a homogeneous insulating layer. subordinate
), there is an effect that insulation properties such as tan δ characteristics and environmental resistance of the rotating electrical machine windings are improved.

[Brief explanation of drawings]

Fig. 1 f) A partial cross section of a coil for a rotating electrical machine which was simultaneously insulated by a conventional method according to an embodiment of the invention [A,
Figure 2 is a cross-sectional view of the coil straight portion of the coil in Figure 1 taken along the line T, and Figure 3 is a cross-sectional view of the coil end portion of the coil in Figure 1 taken along the line I[l-1ff. , FIG. 4 is a schematic diagram of the rotating electric machine winding in which the coil of FIG. 1 is wound, and the fifth (21
is a cross-sectional view taken along the V-V line of the gi joint of the winding 4 (21), and Figure 6 is a cross-sectional view of the gi joint of the winding in Figure 4.
FIG. 7 is a cross-sectional view taken along the line Vl and the phase link portion of the line shown in FIG. In the figure, (1) is the coil, (2) is the straight part of the coil,
(3) is the coil end part, (4) is the coil nose part,
(5) is the coil lead part, (6) is the coil conductor unit, (7> is the main insulation layer, (8) is the glass tape, <9) is the wire conductor, (10) is the wire insulation, (11) is the core, (1
2) is a spacer piece, (13) is a place ring, (14) is a series joint part, (15) is an i joint part, (16) is a phase ring part, (17> is a support arm, and (18) is a Eye line, (
19) is the main insulating layer of the Gillies joint, (20) is the main insulation II of the pole joint, and (21> is the main insulating layer of the phase ring. In each figure, the same reference numerals indicate the same or equivalent parts. Does not indicate. l・

Claims (2)

[Claims] (1) When insulating the coil of the rotating electric machine winding, the series joint part, the pole joint part, and the phase ring part of the coil,
After insulating the entire coil and completing the winding work,
The coil is impregnated with a resin, and then a curing catalyst solution for the impregnated resin is applied to the surfaces of the coil, the series joint part, the pole joint part, and the phase ring part, and then the impregnated resin is cured and dried. Features a method for insulating rotating electrical machine windings. (2) The method for insulating the windings of a rotating electric machine according to claim 1, wherein the curing catalyst for the impregnated resin is a catalyst mainly containing a carboxylic acid metal salt.