JPS644335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for manufacturing a cut-shaped wound core using an amorphous sheet.

``Prior Art'' Most of the cut-shaped wound cores used in pole-mounted transformers are lap-cut types in which the positions of the cut portions are staggered in a stepped manner, so we will explain how to manufacture them. As shown in Fig. 3, this method involves first winding a long amorphous sheet 2 wound around a drum 1 into a ring shape, and then cutting the wound core 3 at one point with a cutter 4 to form a trapezoidal shape. . Next, this trapezoidally laminated amorphous sheet group 5 is divided into several blocks 5A and wound around a ring-shaped wrap-cut wound core 6 whose abutted ends are lapped one after another. Thereafter, the wound core is formed into squares by pressing and annealed in a magnetic field, and then divided into several blocks 6A each and inserted into the windings 7A and 7B arranged side by side. The direction of insertion is indicated by an arrow. 8 in the figure is a wrap cut portion.

"Problems to be Solved by the Invention" Because the wound core 3 is to be combined with the windings 7A and 7B, it is necessary to cut the wound core once, and the amorphous sheet 2 is very thin and hard. , it is difficult to cut, and the cut surface becomes crumbly. Moreover, the cut wound core is divided into a plurality of groups and assembled into the windings 7A and 7B by a worker, but this work is difficult due to the thinness of the core.

"Means for solving the problem" Taking into account that the amorphous sheet 2 is very thin and will break when bent, the windings 7A are arranged in parallel.
The purpose is to obtain a wrap-cut wound core 6 by winding the amorphous sheet 2 around the core 7B while alternating the winding direction for each turn.

"Operation" Since the long amorphous sheet 2 is continuously wound around the windings 7A and 7B arranged side by side in this way while alternating the winding direction, the amorphous sheet 2 is cut at the bending point and cut. form a section. Moreover, if the bending position is shifted, the position of the cut portion is shifted, resulting in a lap cut shaped wound core 6.

"Example" FIG. 1 shows the winding method of the present invention. First, two windings 10A and 10B formed by winding heat-resistant electric wires are placed side by side. The tip 11A of the long amorphous sheet 11 is fixed above (or even below) the winding 10A, and the amorphous sheet 11 is passed through one winding 10B and then into the other winding 10A.
When passing 0A, the tip 1 of the amorphous sheet 11
It reaches 1A. The amorphous sheet 11 is bent at a position facing the tip 11A to change the winding direction by 180 degrees. This completes the first turn of the innermost circumference of this wound core. By this bending, the bent end is cut to form a wrap cut portion 13 between it and the tip 11A. Next, as in the first turn, this amorphous sheet 11 is passed through the other winding 10A and one winding 10B, and then bent at a position slightly shifted from the previous bending position to adjust the winding direction. Change by 180°. This completes the second turn. By carrying out this winding for a prescribed number of turns, the wrap-cut wound core 12 is wound around the windings 10A and 10B. The winding direction of the amorphous sheet 11 is indicated by an arrow.

The shape after winding shown in FIG. 2 is the same as that produced by the conventional manufacturing method shown in FIG. In the figure, 13 indicates a wrap cut portion. After this, winding 10
This winding 10A and 10 with A and 10B combined
Magnetic field annealing is performed using B as an excitation coil.

In the embodiment described above, the bending position of the amorphous sheet 11 was changed every turn, but the bending position of the amorphous sheet 11 may be changed every multiple turns.

In addition, to improve work efficiency, multiple sheets of amorphous
The sheets 11 may be bundled, passed through the windings 10A and 10B at once, and bent at once. Furthermore, the bending position may be fixed at one location to form a cut-shaped wound core.

Furthermore, up to now, the wound core 12 has been explained by exemplifying a single-phase inner iron type (generally referred to as a single-phase D core).
It may be a single-phase outer iron type (generally referred to as a single-phase B core), a three-phase wound iron core type, or the like.

"Effects of the Invention" According to this winding method, (1) Since the wound core 12 is directly wound around the windings 10A and 10B, there is no need to cut the wound core 3 once wound as in the conventional embodiment. do not have.

(2) Since the amorphous sheet 11 is very thin, it will be cut when folded to change the winding direction, and since it is folded one by one, or every 4 to 5 sheets at most, the bent end (cut end) will not fall apart.

(3) Since heat-resistant wire is used as the winding material, magnetic field annealing can be performed with the windings 10A and 10B combined, shortening the work process and greatly improving work efficiency.

As described above, according to the present invention, the features of the amorphous sheet 11 are utilized, and the winding 10
Since it is directly wound around A and 10B, work efficiency is further improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIG. 2 is a front view showing a wound core manufactured according to this embodiment, and FIG. 3 is a manufacturing process diagram showing a conventional embodiment. In the drawing, 10A and 10B are windings, 11 is an amorphous sheet, 12 is a wrap-cut wound core,
13 is a wrap cut portion.

Claims (1)

[Claims] 1. Two windings made of heat-resistant electric wire are placed side by side, the tip of a long amorphous sheet is fixed to these windings, and the amorphous sheet is passed through one winding and then into the other winding. The amorphous sheet is passed through the wire and turned around once, then bent at the tip of this amorphous sheet to change the winding direction by 180 degrees.Then, the bent amorphous sheet is passed through the other winding and then inside one winding. Pass it around in the opposite direction from the previous time,
It is characterized in that it is bent at this point and the winding direction is changed by 180°, and then the winding is continued from the innermost turn to the outermost turn while alternating the winding direction for a prescribed number of turns. Method of manufacturing an amorphous amorphous core.