JPS60234439A - Winding of electric apparatus and manufacture thereof - Google Patents

Abstract

PURPOSE:To realize an insulating organization among conductor groups without inserting an insulating substance between the groups, by a method wherein an insulating layer thicker than any other sections is formed in a section between the conductor groups confronting each other and consisting of long conductors. CONSTITUTION:A unit conductor 15 is organized by forming an insulating layer 14 (thicker section 14A) thicker than any other sections at the side end of a flat type conductor 1. The thicker sections 14A confronting each other are arranged between the first conductor group 16A and the second conductor group 16B aligned longitudinally with six unit conductors 15 each, and the groups are surrounded with a ground insulator 17 made of mica or the like. As the result, the turn insulation is performed by the insulating layer 14 of the sections except the thicker sections 14A, and the insulation between the conductor groups 16A, 16B is performed by the thicker sections 14A of each unit conductor 15.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electrical equipment winding consisting of a conductor group in which a plurality of elongated conductors are arranged in tandem, such as a stator winding of an AC rotating electrical machine, and its manufacture. Concerning improvements in methods.

[Technical background of the invention and its problems]

An example of a stator winding as this type of electric equipment winding is shown in FIG. That is, in FIG. 1, 1 is a rectangular conductor 1 as a long conductor, and an insulating layer 2 is formed on the entire circumferential surface of this rectangular conductor 1, forming a base conductor 3. Six base conductors 3 are arranged in tandem to form a second conductor group 4B similar to the first conductor group 4A, an insulator 5 is interposed between the conductor groups, and the entire circumference is covered with a resistive material such as mica. As shown in FIG.
, a product made by uniformly applying a powdered enamel resin and baking it several dozen times or more, or a product made by winding glass fiber after the baking process,
Alternatively, those constructed by winding thin heat-resistant films are in practical use.

In this case, in order to form the insulating layer 2 on the rectangular conductor 1 and manufacture the base ring 3, the electrostatic movement method is applied to the apparatus shown in FIG. That is, the rectangular conductor 1 is pulled out from the material drum 7 on which the rectangular conductor 1 is wound, and the roller 8, the electrostatic dynamic coating tank 9, and the baking furnace 1 are moved while maintaining the direction of the rectangular conductor 1.
0, a cooling device 11, and rollers 12, and is wound onto a winding drum 13. Here, in the electrostatic dynamic coating tank 9, powder resin is applied to the entire circumferential surface of the rectangular conductor 1. The deposited powder resin is baked onto the rectangular conductor 1 in a baking furnace 10, and then cooled to form a base ring 3 as shown in FIG. In addition, in FIG. 3, a conductor stretching device (not shown) and a conductor preheating device etc. are combined as necessary.

In the fixed stator winding having the above-mentioned configuration, each base ring 3
In between (between turns), there are several tens of yl? A voltage equal to the number of windings (turns) is applied. For example, if the inter-turn voltage is 20 volts, a voltage of 20×6=120 volts is applied to each conductor group 4A, 4B. Furthermore,
Switch opening/closing surges and electric surges entering from the external power source are applied between the turns and between the conductor groups. An insulating layer 2 and an insulator 5 are provided as means for preventing short circuits caused by the application of high voltage between turns and between conductor groups.

By the way, the above-mentioned 42-turn coil has a simpler winding method than other methods such as a zigzag winding coil, so it is the easiest to wind automatically. However, if applied to a stator winding, it would be configured as a hexagonal coil, and the insulator 5 would need to be installed over the entire circumference of the coil. In this case, when inserting the conductor between the conductor groups 4A and 4B, there are problems described below in ensuring the insulation function.
Ru.

That is, in the above configuration, after forming the rectangular conductor 1 or the base ring 3 in a tortoise shell shape, when arranging the insulators 5 and inserting them between the conductor groups 4A and 4B, in order to secure the space for insertion, Therefore, the conductor groups 4A and 4B must be mechanically opened, and the ends of the coils must be expanded three-dimensionally. Therefore, the work required special attention and required a lot of man-hours, making it uneconomical.

Furthermore, before forming the rectangular conductor 1 or the base ring 3 into a hexagonal shape, in other words, the insulator 6 is placed in the conductor group 4 between 4B in a long state, and then the whole is formed into a hexagonal shape. In this case, P
3. The green material 5 is subjected to large bending and stretching forces, causing wrinkles and breakage, resulting in a decrease in insulation function after completion. Therefore, special inspection and repair were required after completion, and special consideration was required in the selection of materials since the above-mentioned problems would occur.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to provide an electrical equipment winding wire and a method for manufacturing the same, in which insulation between conductor groups can be realized by a configuration other than inserting an insulator. It is about providing.

[Summary of the invention]

The electrical equipment winding according to the present invention is characterized in that an insulating layer is formed on the facing surface of a conductor group made of elongated conductors, which is thicker than other parts, and the method for manufacturing the electrical equipment winding includes:
When forming an insulating layer on the conductor using an electrostatic dynamic method and a baking process, the powder resin adhered to all parts of the conductor by the electrostatic dynamic method is applied to specific parts by twisting the conductor. It is characterized in that it is collected and dispersed and then subjected to a baking process.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. That is,
Figure 4 shows the electrical equipment winding of this embodiment, and shows the case where it is applied to the stator winding of an AC rotating electrical machine. The same parts are given the same reference numerals and their explanation will be omitted.

In FIG. 4, a base ring body 15 is formed by forming an insulating layer 14 on the rectangular conductor 1, which has a thick wall (thick part 14A) only at the side ends thereof (thick part 14A).

The first conductor group 16A1 has six base conductors I5 arranged in series.
The conductor groups 16B are arranged with their thick portions 14k facing each other, and are surrounded by ground cotton R17 made of mica or the like. In this case, multiple voids 18 are formed in the thick portion 14A between the first conductor group 161 and the second conductor group 161.16B. This void 1B can be filled with resin by complete impregnation treatment under vacuum pressure.

With the above configuration, the inter-turn insulation is done by the insulating layer 14 in the part other than the thick part 14A, and the conductor group 16 is provided with 16B.
Insulation between them is ensured by the thick portion J4A of each base conductor 15. Therefore, the overall size can be reduced without requiring the conventional insulator, and since there is no need to insert an insulator, automatic winding, which is a feature of the /4' spiral coil, is easy. It is possible to implement the method in a variety of ways, and can provide high quality and economical efficiency.

In the above method, the thick portion 14 can be formed by changing the die dimensions during the baking process, or by a local spray method, but industrially, the #permeable flow method shown in Fig. 3 is used. This can be done more easily than changing the device.

That is, as shown in FIG. 6, the roller 12 and the winding drum 1
3 is turned upside down, the rectangular conductor 1 from the material drum 7 passes through the roller 8 and the electrostatic dynamic coating tank 9 and is transferred to the baking furnace l.
The base conductor is made of a rectangular conductor which is twisted by 90' in a rectangular conductor, and is hardened by baking and hardening the rectangular conductor. 15 can be obtained.

In addition, 900 m@ of the rectangular conductor 1 in the above is achieved as follows. That is, the length from the drawer of the rectangular conductor 1 to the position where the roller 8 passes through the electrostatic dynamic coating tank 9, and the length of the baking furnace 10 after this position. This is achieved by configuring so that the length from passing through the cooling device 11 to the roller 12 is equal.

Furthermore, the dimensions of the thick portion 14 can be varied depending on the degree of flow of the powder resin. In this case, among the basic components of the powder resin, such as wood + m curing agent, flow control agent, pigment, etc., adjusting the ratio of the inorganic filler to the flow control agent and selecting the baking temperature in the baking furnace 10, Can be adjusted.

According to the present method described above, it is possible to perform the electrostatic motion method using a single baking process by simply changing the arrangement of conventional equipment, without requiring complicated processes such as multiple baking processes or die changes. The uneven thickness insulating film (the thick portion 14A and the insulating layer 14) is formed without losing the characteristics, and it becomes possible to manufacture the electrical equipment winding shown in FIG.

In the above embodiment, the case where there are two conductor groups was specifically described, but
The conductor group may be composed of three or more conductor groups, and in this case, thick portions are formed on both sides of the rectangular conductor 1. The formation of this thick part on both sides is done after twisting by 90° in Fig. 6.
This is achieved by twisting it again by 90 degrees.

The present invention is not limited to the above-described embodiments, but is applicable to all cases in which a long conductor other than a rectangular conductor is configured as a spiral coil, and can be applied to any case where a rotating machine or stationary machine is constructed. It is possible. In addition, various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, according to the present invention, when an insulating layer is formed on a long conductor by an electrostatic dynamic method and a baking process, the insulating layer is adhered to all parts of the conductor by the electrostatic dynamic method. A base conductor was obtained in which the insulation layer was thicker in the specific area than in other areas by spreading the powder resin on a specific part of the conductor by twisting it and baking it. Since the conductor group is constructed using the base conductor, it is possible to provide an electrical equipment winding that achieves insulation without inserting any member between the conductor groups, and a method for manufacturing the same.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing a conventional electrical equipment winding, Fig. 2 is a detailed view of the base conductor in Fig. 1, Fig. 3 is a diagram for explaining the manufacturing of the conventional electrical equipment winding, and Fig. 4 is a diagram for explaining the manufacturing of the conventional electrical equipment winding. 5 is a detailed diagram of the base conductor in FIG. 4, and FIG. 6 is an example of a method for manufacturing an electrical device winding according to the present invention. Diagram 7 for explaining the embodiment
The figure is a perspective view for explaining the operation of the same embodiment. l... Rectangular conductor, 7... Material drum, 8... Roller, 9... Electrostatic dynamic coating tank, 10... Baking furnace, 11
... Cooling device, 12 ... Roller, 13 ... Winding drum, 14 ... Insulating layer, 74A ... Thick part, 15.
...Base conductor, 16, 16B...1st. Second conductor group, 17... Ground insulation, 18... Air gap. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 3

Claims (1)

[Claims] (1) At least a first conductor made of a plurality of long conductors arranged in tandem. An electrical equipment winding in which a second group of conductors are arranged in parallel and facing each other, characterized in that an insulating layer is formed on the opposing surface of each conductor to be thicker than on other parts.・(2) Powder resin is applied to all parts of the long conductor constituting the stain-free device winding using the electrostatic motion method, and the conductor is twisted so that a specific part of the conductor is located at the bottom. A method of manufacturing an electrical device winding, comprising: collecting and dispersing powder resin on the specific area, and then performing a baking process to form a thicker insulating layer on the specific area of the conductor than on other areas.