JPS5951735B2 - Manufacturing method of multi-wound coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a multi-turn coil with a two-part structure used in transformers, reactors, etc.

BACKGROUND ART A structure in which the coil of a transformer or the like is formed of a multi-turn coil and the coil is divided into upper and lower halves is employed for various purposes. For example, for the purpose of series-parallel switching, for reducing stress on interlayer insulation, or for winding upper and lower coils at the same time to reduce winding man-hours. Target, etc. FIG. 1 shows an example of a conventional multi-turn coil with a two-part structure.

Conventionally, such a coil was manufactured by first winding the lower half (or upper half) of the coil, and then winding the upper half of the coil. The end filler 2 was inserted, the interlayer insulator 3 was placed, the second layer of coil was wound thereon, and the required number of layers were wound in the same manner to form a multi-wound coil. In such a multi-wound coil, after the conductor 4 is wound, the end filler 2 and the interlayer insulator 3 are wound and inserted.

In other words, the coil winding process consists of the conductor winding process and the insulator insertion process in series. However, such work is a combination of different works, and the coil winding work is
Inserting the interlayer insulator or end filler required a discontinuous work process, lengthened the work time, and was also a major obstacle in automating the coil winding work. On the other hand, from the viewpoint of materials, the width of the coil varies depending on various specifications such as model and capacity, so it is necessary to prepare interlayer insulators according to each specification.

Therefore, space for manufacturing, preparing, storing, and storing various interlayer insulators is required, making the work even more complicated. In addition, in terms of insulation, a voltage proportional to the number of turns is applied to each part of the interlayer insulator coil, but the interlayer insulator is selected to withstand the highest applied voltage. The insulation part had become over-insulated and unreasonable.

In terms of workability and finish, when inserting interlayer insulators, a wide material is wound, which causes wrinkles, bulges and creases, resulting in a decrease in insulation properties, variations in finished dimensions, vibrations, and electromagnetic machinery. It had drawbacks such as being weak against force.

In particular, when the dimensions are large, the interlayer insulator is thick and hard, or the number of sheets is large, winding is difficult, requiring two people, and the wrinkles and curling described above often become severe. Regarding the end filling, the type of material differs depending on the capacity, model, etc., and the work involves wrapping and fixing the necessary number of sheets according to the thickness of the conductor, and then cutting them according to the coil circumference. Some work was required. Regarding the yield of other materials, there are many different widths of interlayer insulators, and
Since the amount used was different, the yield during processing was poor, and the circumferential length of the filling was different for each layer, as well as the width was different, so the yield was poor and there was a lot of waste.

As mentioned above, there are many points that need to be improved in conventional multi-wound coils, such as management of working time and insulation materials, yield, over-insulation in terms of insulation, and machining defects.

The purpose of the present invention has been made in view of the above-mentioned points, and it is possible to shorten working time and facilitate automation, and also to make it easier to standardize the types of insulating materials, as well as to significantly improve yield and production management. The present invention aims to provide a method for manufacturing a multi-wound coil having a two-part structure that rationalizes insulation, reduces machining defects, and is resistant to short-circuit mechanical forces.

That is, in the present invention, a coil having a two-part structure is manufactured by using a tape-shaped insulating material and simultaneously and continuously winding a coil conductor, an interlayer insulating material, and an end filler.

The present invention will be explained below with reference to the drawings. In FIG. 2, first, the winding start portions 111, 1"1 of the coil conductors 11, 11" fixed at a predetermined position on the inner peripheral insulator 10 are sequentially wound in the direction of the arrow, respectively. The tape-shaped insulators 121 and 12''1 are also wound at the same time to fill the end portions 13.
a, 13″a are stacked.

When the conductor 11 is wound n1 times, the conductor 11 is placed at a certain position 11n1.
, 1 "n1, and the tape-shaped insulator 12 has completed the formation of the end filling 13a. After that, the conductors 11, 1
`` is sequentially wound up to n times and advances to the position 11n, 1''n, and the tape-shaped insulator 12 is wrapped around the interlayer insulator 14.
a, 14a'', the wound conductor 11,
11" with appropriate wraps and after n times, conductor 1
1n and 11''n respectively. This completes the formation of the first winding layer of each coil. Next, conductors 11 and 11''
is from the winding end portions 11n, 11″n of the first winding layer to the second winding layer.
The conductors 11n+1, 1'n+1 are wound sequentially to the conductors 112n, 1'2n, respectively, moving to the layers. Meanwhile, the tape-shaped insulators 12, 12' are wrapped around the end filling 13.
After layering the interlayer insulators 14b, 13b'',
4b''. At the same time as the conductors 112n and 1''2n are wound, the tape-shaped insulators 12 and 12'' are also wound with appropriate wraps on the conductors 11 and 11'', respectively, to form the second layer. Complete the second coil winding. Repeat the same operation to wind the third and subsequent layers to complete all coil windings. In the above explanation, two coils are wound as shown in Figure 2. Although the directions of winding are shown to be opposite to each other, they may be wound in the same direction.

Furthermore, the winding start position may be determined at any position. As is clear from the above description, the multi-wound coil according to the present invention can be manufactured by continuous winding by matching the number of turns of the coil conductor 11 and the number of turns of the tape-shaped insulator 12, and furthermore, the multi-wound coil according to the present invention can be manufactured with continuous winding, and also has end filling and interlayer insulation. Objects can be formed at the same time as the conductor is wound, with great results for standardizing coil winding materials and automating coil winding.

In addition, in order to wind the upper and lower coils at the same time, the cooling oil pipe (
or airway) 15 can be placed in common between the upper and lower coils. Since two coils are wound at the same time, the working time for the coil can be greatly reduced. The present invention can also be applied to cases where the number of coil divisions is two or more.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a multi-turn coil with a two-part structure that has been commonly used in the past, and FIG. 2 is a cross-sectional view of a multi-turn coil with a two-part structure according to the present invention. 1... Main gap insulator, 2... End filling, 3... Interlayer insulator, 4... Coil conductor, 5...・Duct, 6...Other windings, 7
... Iron core, 10 ... Inner circumference insulator, 11
, 11'' coil conductor, 12... tape-shaped insulator, 13... end filling, 14... interlayer insulator, 15 duct.

Claims (1)

[Claims] 1. When forming multiple coils by winding multiple coil conductors in multiple layers on an insulating cylinder, the end fillers provided at both ends of each coil and the interlayer insulation provided between the layers are replaced with tape-shaped insulators. A method for manufacturing a multi-wound coil, characterized in that it is formed by winding a multi-wound coil.