JPH0260440A - Rotor - Google Patents

Abstract

PURPOSE:To prevent damage to rotor coils by fixing epoxy-resin-impregnated glass tape to bind lead wires and crossovers to the coil end sections of the rotor coils with the resin which the tape is impregnated with. CONSTITUTION:A lead wire 15 led from a rotor coil 13 and a crossover 16 to connect between rotor coils 13 are arranged along the right end of a coil end section 13a of a rotor coil 13. The lead wire 15 and crossover 16 are bound at plural spots with binding tape 17 consisting of glass tape impregnated with epoxy resin. They are mutually fixed with the resin with which the tape is impregnated. The binding tape 17 itself is fixed to the right end of the coil end section 13a of the rotor coil 13 with the resin which the tape is impregnated with.

Description

DETAILED DESCRIPTION OF THE INVENTION [First aspect of the invention] (Industrial Application Field) The present invention relates to a rotor with an improved bundling structure for lead wires and crossover wires.

(Prior Art) As an example of a rotor for a rotating electric machine, those shown in FIGS. 5 and 6 are provided. 5 and 6, 1 is a rotor shaft, 2 is a rotor core mounted on the rotor shaft 1, and 3 is a rotor coil wound around the rotor core 2. In FIGS. Reference numeral 4 indicates a lead wire led out from the rotor coil 3, and reference numeral 5 indicates a crossover wire that connects the rotor coils. Bondage is fixed. 7 is a binding tape made of epoxy resin-impregnated glass tape, which is attached to the coil end portion 3a.
The wire is wound around the wire a predetermined number of times, and after being fully impregnated with varnish, it is dried in a hot air oven. As a result, the binding tape 7 is cured and fixed by the impregnated resin.

(Problems to be Solved by the Invention) However, in the above conventional configuration, when the lead wire 4 and crossover wire 5 are tied to the coil end portion 3a with the glass string 6 as shown in FIG. Since the inside of the rotor coil 3 is penetrated, there is a risk of damaging the rotor coil 3 when passing through the rotor coil 3.

In this case, since a carphon brush is used in a rotor having such a rotor coil 3, the conductive material of the carpon brush may be deposited on the damaged part of the rotor coil 3. There was a problem in that the insulation resistance decreased, causing dielectric breakdown. Further, due to strength problems of the glass string 6, the string may break during the above-mentioned binding, resulting in low productivity. Furthermore, even after binding, the glass string 6 may break due to external force, etc. In particular, if the glass string 6 breaks due to centrifugal force while the rotating electric machine is operating, the lead wire 4 or the crossover wire 5 or the stator coil may be damaged. The drawback was that contact could cause dielectric breakdown.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent rotor coils from being damaged when fixing lead wires and crossover wires to coil end portions, improve productivity, and further improve the reliability of the above-mentioned fixing. We are able to provide rotors that can.

[Structure of the Invention] (Means for Solving the Problems) The rotor of the present invention has a rotor coil wound around a rotor core, a lead wire led out from the rotor coil, and a connection between the rotor coil. The lead wire and the crossover wire are bound together with epoxy resin-impregnated glass tape at a plurality of locations and fixed to each other with the impregnated resin, and the tape is fixed to the wire with the impregnated resin. It is unique in that it is fixed to the coil end of the rotor coil.

(Function) According to the above means, the tape that binds the lead wire and the crossover wire is simply fixed to the coil end portion with its impregnated resin, unlike the conventional method in which the string threading needle is passed through the inside of the rotor coil. , there will be no damage to the rota coil. Additionally, glass tape is stronger than glass cord and will not break when tied together, improving productivity.

In addition, since the glass tape is cured by its impregnated resin and fixes the lead wire and crossover wire to each other and to the coil end portion, the reliability of the fixing can be made higher than that of conventional glass strings.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 4.

First, in FIG. 3, ]] is a rotor shaft, and 12 is a rotor core made of laminated stamped iron plates with a predetermined thickness, which is shrink-fitted into a four-trochanter shoe.

]3 is a rotor coil wound around the rotor core 12, which is inserted into the slot of the rotor core [2] via a slot insulator]4.

Now, in Figures 1 and 4, 15 is the rotor coil]
The lead wire 16 is a connecting wire connecting between the rotor coils 13, and the lead wire 15 and the connecting wire 16 are connected along the right end of the coil end 13a of the rotor coil 13 in FIG. It is located. Reference numeral 17 denotes a binding tape made of epoxy resin-impregnated glass tape, which binds the lead wires 5 and crossover wires 6 at a plurality of locations, for example, eight locations, and fixes them to each other using the impregnated resin. The above-mentioned binding tape] 7 binds the coil end portion 1.3 a of the rotor coil 13 with its impregnated resin.
It is fixed to the right end in FIG.

On the other hand, reference numeral 18 denotes a binding tape made of epoxy resin-impregnated glass tape, which is wound around the outer periphery of the coil end portion 13a a predetermined number of times and fixed by the impregnated resin. ] 7 with both ends 17a and 1.7b sandwiched therebetween.

Here, a method of binding the binding tape 17 and winding the binding tape 8 will be described with reference to FIG. 2 as well. As shown in FIG. 2, after placing one end 17a of the binding tape 7 on the outer periphery of the coil end 13a, the binding tape 1 is placed over the one end 17a.
8 is primarily wound around the outer periphery of the coil end 13a. At the same time, after binding the lead wire 15 and crossover wire 16 with the binding tape 17 at the right end in FIG. 2 of the coil end portion 13a, the other end 17b of the binding tape 17 is connected to the
Next, place it on the wound binding tape 18. After this, bind tape from above other end]-7b]8
is wound in a secondary manner as shown in Fig. 1. When binding the above-mentioned binding tape 17 and winding the binding tape 18, the binding and winding work is performed while applying a predetermined amount of heat. Since it hardens with nuclear heat, the binding tape] 7 Nyorori-1 - Fixing the wire 15 and the crossover wire 16, fixing the binding tape] 7 and the coil end part 13a, binding tape 18 and the coil end Fixing with part 13a and binding tape] 8 and both ends 17a and 17b of binding tape 17 are fixed. After this, the entire tape is subjected to an impregnating varnish treatment, and then heated and dried in a hot air oven. By heating, the adhesion strength of each tape 17, 18 due to its respective impregnated resin is further improved.

According to this embodiment having such a configuration, the binding tape 17, which is a circular tube for binding the lead wire 15 and the crossover wire 16, is fixed to the coil end portion 1.3a with its impregnated resin. Unlike the conventional method of penetrating the interior of the rotor coil 3 with a threading needle (see Fig. 5), the rotor coil 3 is not scratched or damaged. It prevents the occurrence of dielectric breakdown without causing any adhesion or deposition. Further, the binding tape 17 is a glass tape, and this glass tape is stronger in strength than a glass string, and unlike the conventional bonding using the glass string 6, no tension is applied to the tape 17 when binding. There is no possibility that the tape 17 will break during the bundling work, and productivity will be improved. and,
The binding tape 17 is hardened by the impregnated resin.
1. Since the wire 15 and the connecting wire 16 are fixed to each other and to the coil end portion 13a, the reliability of the fixing can be made higher than that of the conventional method in which the wires are tied together using glass strings 6. Therefore, even if centrifugal force acts on the F wire [5] and the crossover wire [6] during operation of the rotating electric machine, the fixed binding tape 17 will not be cut. and crossover wire] 6. Accidents of contact with the stator coil are eliminated, and the occurrence of dielectric breakdown can be prevented.

[Effects of the Invention] As is clear from the above description, the present invention binds a lid wire and a crossover wire with epoxy resin impregnated in multiple places with lath tape and fixes them to each other with the impregnated resin,
Since the tape is fixed to the coil end portion of the rotor coil with its impregnated resin, it is possible to prevent damage to the rotor coil when fixing the lead wire and crossover wire to the coil end portion, and improve productivity. This has the excellent effect of improving the reliability of the fixation described above.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, FIG. 1 is a longitudinal sectional side view of the main part, FIG. 2 is a longitudinal sectional side view of the main part showing a state in the middle of manufacturing, and FIG. FIG. 4 is a longitudinal sectional side view of the upper half of the rotor, and FIG. 4 is a front view of the rotor. In addition, Figures 5 and 6 are equivalent to Figure 1 and Figure 4, respectively, showing the conventional configuration.
It is a figure equivalent figure. In the drawing, 12 is a rotor core, 13 is a rotor coil, ]3
a is the coil end, ]5 is the lead wire, 16 is the crossover wire,
17 indicates a binding tape (epoxy resin-impregnated glass tape).

Claims (1)

[Claims] 1. A rotor coil wound around a rotor core, a lead wire derived from the rotor coil, and a crossover wire connecting the rotor coils, wherein the lead wire and the crossover wire are A rotor characterized in that the rotor is bound together with epoxy resin-impregnated glass tape at a plurality of locations and fixed to each other with the impregnated resin, and the tape is fixed to the coil end portion of the rotor coil with the impregnated resin.