JPS58139417A - Manufacture of conductor for coil of electric equipment - Google Patents

Abstract

PURPOSE:To facilitate unification of coils after coil formation by a method wherein the multiple conductors are continuously unified in a body in parallel making use of photo setting resin. CONSTITUTION:The flat type enamel wires 20 are respectively drawn from multiple drums 1 to be passed through the felts 2 soaked with liquid resin mixed with photosetting resin and peroxide so as to coat the wires 20 with this mixed resin while the wires 20 are passing through the felts 2. Firstly the multiple connectors 20 are bundled in parallel by means of the rollers 3, 4 being depressed in the vertical direction by the rollers 5 to be irradiated by ultraviolet rays using a lamp 6. Secondly said conductors 20 get into a heating furnace 7 settng the resin perfectly to form another conductor 14 into solid one body. Thirdly the conductor 14 is coated with a mixture of potential setting agent and epoxy resin or B stage resin through another felt 9 to be wound up on a drum 11 via a solvent drying furnace 10.

Description

[Detailed Description of the Invention] This invention relates to a method for manufacturing a conductor for an electric equipment coil, and more specifically, a conductor for an electric equipment coil in which multiple conductors are bonded in parallel to form an integrated conductor. The present invention relates to a manufacturing method.

Conductors used in coils of electrical equipment are generally used in alternating magnetic fields generated by their own coils or other coils, and this alternating magnetic field causes eddy current losses in the conductors. In order to reduce this eddy current loss, the conductor is often divided into multiple thin conductors and configured in parallel. There was a problem in that the conductor deformed due to force.

As a solution to this problem, it would be practically advantageous to bond the divided conductors together with an adhesive and integrate them, but no suitable manufacturing method has been found so far. Therefore, there has been a demand for an appropriate manufacturing method that integrates multiple conductors in parallel and continuously.

This invention is based on the above l! This was developed in response to the demand for electrical equipment coils, in which multiple conductors are continuously integrated in parallel using a photocurable resin, and then a self-adhesive resin is applied or insulation paper is wrapped around the coil. The object of the present invention is to provide a method for manufacturing a conductor.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 7, an enameled wire 20 with a rectangular cross section pulled out from a counting drum is passed through a felt rod shaped like a die. For example, this Feltco uses epoxy acrylate resin or unsaturated polyester resin that has one or more double bonds in seven molecules, a photocuring initiator such as benzophenone or benzoin, and a peroxide such as dicumyl peroxide. A suitable mixture of different polymerization initiators is constantly impregnated, and when the enameled wire ao passes through the feltco, this mixed resin is applied. Next, roller 3. A plurality of enamel wires 0 are bundled in parallel by a roller 3 which further presses the enamel wires 0 in the vertical direction with appropriate pressure via a spring (not shown) so that they become parallel rectangular wires. Pass through the enameled wire coated with the mixed resin. At this time, the enameled wire O is irradiated with ultraviolet light from the lamp 6. This is the second
As shown in the figure, when the ultraviolet rays shown by the arrows are irradiated from the left and right of the enameled wire 0, the resin in the grooves formed at the joints of the rectangular enameled wires 0 and 0 is instantly cured.

In this way, the enameled wires are bonded to each other to the extent that they do not come apart even if the force of the presser is removed. The enameled wire ○ bonded in this way then enters the heating furnace 7, where the light-irradiated part is heated and the resin is completely cured by the action of the peroxide polymerization initiator, forming a strong, integrated conductor/ 41 is formed. Guide rollers t guide the conductor to the center of the heating furnace.

Next, a mixture of a latent curing agent and an epoxy resin dissolved in a solvent or a B-stage resin is applied to the conductor /41 integrated by Fell), and finally passed through a solvent drying oven lθ. wind the drum//#C conductor 14I.

The rollers J, 4', j and the guide roller j are desirably made of a material such as polytetrafluoroethane, which has good slippage and is resistant to damaging enamel or cured resin.

When a desired coil is constructed using the conductor /4< formed as described above, the coil is temporarily fixed to prevent it from falling apart and heated. The mixture of latent curing agent and epoxy resin applied with epoxy resin or B-stage resin self-fuses and cures, and the conductors/4I comrades cured with photocurable resin are bonded together, making it possible to integrate the entire coil. It will be shown.

Next, another embodiment of the invention will be described using FIG. 3. The conductor led out from the heating furnace 7 in FIG. 1 passes through a paper winding machine 13 that winds an insulating paper tape /2, and is wound onto a drum.

Such a paper-wrapped conductor 7411L is useful as a conductor for a coil for oil-filled electrical equipment.

As described above, this invention integrates multiple conductors using light and heat, and furthermore, makes it easier to integrate the coils after coil formation by using self-adhesive resin, or by wrapping insulating paper and applying oil. It has advantages such as being suitable for use in coils of electrical equipment.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram for explaining one embodiment of the present invention,
FIG. 1 is a partially enlarged perspective view, and FIG. 3 is a conceptual diagram for explaining another embodiment. /...Drum, Ko, 9...Felt, J,, 41. j・
・Roller, 6...Lamp, 7...Heating furnace, l...Guide roller, lO...Solvent drying oven, /'/@・Drum, lco...Insulating paper tape, 13...Paper rolling machine, /lI, /F&・
・Conductor, CO0...enamel wire. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Shin Kuzuno −

Claims (1)

[Claims] I/L rectangular enamel conductor is coated with a liquid resin containing a photocurable resin mixed with peroxide, and a plurality of the rectangular enamel conductors coated with the liquid resin are bundled to form a parallel conductor. A conductor for an electrical equipment coil, characterized in that the parallel conductor is irradiated with ultraviolet rays, further heated, and then coated with at least one of a B-stage resin or a mixture of a latent curing agent and an epoxy resin. manufacturing method. (v) Applying a liquid resin containing a photocurable resin and peroxide to a rectangular enamel conductor, and bundling a plurality of the rectangular enamel conductors coated with the liquid resin to form a parallel conductor;
A method for producing a conductor for an electrical equipment coil, which comprises the steps of irradiating the parallel conductor with ultraviolet rays, then heating it, and then winding an insulating paper tape.