JPH0636338U - Rotating electric machine winding - Google Patents

Abstract

(57) [Summary] [Structure] The resin injection is not obstructed during the vacuum pressure impregnation treatment, and the resin is prevented from flowing out during curing and drying. [Effect] When the resin is injected, the insulating sheet 8 having a good impregnating property is inserted into the outlet branching portion 7, and therefore passes through the inside of the insulating sheet 8. Further, the resin can be impregnated into the conductor 4 through the gap between the insulating sheet 8 and the insulating tape 6. Further, during curing and drying, the catalyst contained in the insulating sheet 8 reacts with the resin, the curing is promoted in the insulating sheet 8 portion, and the resin can be prevented from flowing out from the outlet branch portion 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to insulation of a lead wire portion of a rotary electric machine winding.

[0002]

[Prior art]

 The stator winding of the rotary electric machine winding has a hexagonal shape as shown in FIG. As shown in FIG. 4, the lead wire insulation 3 is formed by winding a mica tape and a polyester film on the coil lead wire 2. The coil insulation 5 is obtained by winding a mica tape and a polyester film on the conductor 4, and the lead-out insulation 3 and the coil insulation 5 are individually wound. The insulation 5 and the insulation 5 are integrally insulated. A gap is formed in the outlet branch portion 7 and serves as a resin injection path to the conductor 4 during the vacuum pressure impregnation process which will be performed later. After that, the coil is housed in the iron core, and the iron core and the coil are integrally subjected to epoxy resin vacuum pressure impregnation treatment and curing and drying.

Since the coil is laid horizontally during the curing and drying, the output wire branching portion 7 is located below the coil, and the resin whose viscosity has decreased due to heating flows out from this portion. Further, since the polyester film of the output wire insulation 3 and the polyester film of the coil insulation 5 are in contact with each other at the output wire branching portion 7, the flowability of the treated resin is good and the flow of the resin is promoted.

For this reason, there is a problem that a void is slightly generated between the conductors 4 and between the conductor 4 and the coil insulation 5, and the insulation characteristics are deteriorated. Further, a method of inserting a sheet into the outlet branching portion 7 or a method of setting a coil with the outlet branching portion 7 facing up and performing curing and drying treatment can be considered. However, the former impedes the resin injection during the vacuum pressure impregnation process, resulting in poor impregnation between the conductors 4. The latter requires the coil to fall over, which lowers productivity and causes resin outflow in the core slots, resulting in deterioration of insulation characteristics. SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims at preventing resin injection during vacuum pressure impregnation treatment and preventing resin outflow during curing and drying.

[0005]

[Means for Solving the Problems]

 The present invention inserts an insulating sheet impregnated with a catalyst that accelerates the curing of resin in advance at the branch line of the lead wire, wraps the insulating tape on the insulating sheet to form a winding, and then vacuum-presses it with epoxy resin. A rotating electrical machine winding characterized by being impregnated.

[0006]

[Action]

 At the time of resin injection, the insulating sheet 8 having a good impregnating property is inserted into the branching portion 7 of the mouth, so that the resin passes through the inside of the insulating sheet 8. Further, the resin can be impregnated into the conductor 4 through the gap between the insulating sheet 8 and the insulating tape 6. Further, during curing and drying, the catalyst contained in the insulating sheet 8 reacts with the resin, the curing is promoted in the insulating sheet 8 portion, and the outflow of the resin from the outlet branch portion 7 can be prevented.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of a rotating electric machine winding according to the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a general view of the rotating electric machine winding. In the figure, mica tape is wound around the surface of the conductor 4 to form the coil insulation 5, and the lead insulation 3 is also formed to form a hexagonal stator winding as shown in FIG.

As shown in FIG. 1, the outlet branch portion 7 between the outlet insulation 3 and the coil insulation 5 contains or is coated with a catalyst that enhances the curing of the resin, and has an excellent insulation property. (For example, non-woven fabric, aramid paper) 8 is inserted, and the insulating tape 6 is wound on the output insulation 3 to integrally insulate the output insulation 3 and the coil insulation 5 (as shown in FIG. 3). Therefore, the gap between the output insulation 3 and the coil insulation 5 is eliminated by the insulating sheet 8. After that, the stator having the stator winding 1 housed in a slot of an iron core (not shown) is placed in a vacuum tank, subjected to vacuum pressure impregnation treatment with epoxy resin, and cured and dried. At the time of resin injection, since the insulating sheet 8 having a good impregnating property is inserted into the branching portion 7, it passes through the inside of the insulating sheet 8. Moreover, the resin can be impregnated into the conductor 4 through the gap between the insulating sheet 8 and the insulating tape 6. In addition, in the output branching portion 7, the flowability of the treated resin can be hindered by the insulating sheet 8 between the polyester film of the output insulation 3 and the polyester film of the coil insulation 5.

Further, during effective drying, the catalyst contained in the insulating sheet 8 reacts with the resin before the treated resin cures, the curing is promoted in the insulating sheet 8 portion, and the resin is shielded in the insulating sheet 8 portion. The resin impregnated in the space between the conductors 4 can prevent the resin from flowing out from the outlet branch portion 7.

[0010]

[Effect of device]

 The resin can be prevented from flowing out in the vicinity of the conductor during curing and drying, and voids in the vicinity of the conductor can be prevented from occurring, so that deterioration of the insulating property can be prevented.

Further, since the branching portion of the mouth can be shielded, the deterioration of the Meg is suppressed even in the rotating electric machine used in a severe environment such as high humidity, sweat damage, salt damage, etc., and the reliability of the insulation quality is improved. You can

[Brief description of drawings]

FIG. 1 is a transverse sectional view of a rotating electric machine winding according to the present invention,

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an overall view of a rotating electric machine winding,

FIG. 4 is a cross-sectional view of a conventional rotary electric machine winding,

5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stator winding 2 ... Coil lead wire 5 ... Coil insulation 6 ... Insulation tape 7 ... Exit branch 8 ... Catalyst impregnated insulation sheet

Claims (1)

[Scope of utility model registration request] 1. A rotary electric machine winding in which a hexagonal stator winding having mica insulation is housed in a slot of an iron core, wherein hardening of a resin is promoted in advance at a lead wire branch portion of the stator winding. A rotary electric machine winding, wherein an insulating sheet impregnated with a catalyst is inserted, an insulating tape is wound on the insulating sheet to form a winding, and then vacuum pressure impregnation treatment is performed with an epoxy resin.