JPH0555060A - Foil winding transformer - Google Patents

Abstract

PURPOSE:To provide a foil winding transformer in which inner and outer windings can be wound continuously while being loaded on a winder. CONSTITUTION:In a foil winding transformer wherein a metal sheet and an insulating sheet are wound while being superposed, an inner winding 2 is wound on the outside of an inner insulating tube 1 and a main insulating part 5 is constituted thereon and an obliquely split insulating tube 3 is fit thereto from the side thereof and then an outer winding 4 is wound thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foil winding of a foil winding transformer.

[0002]

2. Description of the Related Art In a conventional foil winding transformer, an inner winding is manufactured by winding an inner insulating cylinder as a core, and an outer winding is separately manufactured by using an outer insulating cylinder as a core. It Then, the two are fitted to each other via the main insulating portion to form a winding. The main insulating portion between the inner winding and the outer winding is filled with an insulating material in order to secure an insulation distance.

Since the main insulating portion formed by fitting the inner winding and the outer winding together is a high-voltage filling portion, a large insulating distance is required when using an insulating material having a high density. Therefore, the corrugated press board is used. Etc. are used to reduce the insulation distance while maintaining the distance between the inner winding and the outer winding.

3 and 4 are a horizontal sectional view and a vertical sectional view of a main part of a conventional foil winding transformer. In FIGS. 3 and 4, a metal sheet and an insulating sheet are superposed on the outer side of the inner insulating tube 1. The outer winding 4 and the outer winding 4 are wound separately, and the outer winding 4 and the outer winding 4 are separately wound. It is manufactured by inserting the wire 4 and filling the main insulating portion 5 between both windings. The main insulating portion 5 provided between the outer side of the inner winding 2 and the inner side of the outer insulating tube 6 is formed by winding a corrugated insulating plate or the like.

[0005]

However, in such a conventional foil winding transformer, a certain amount of clearance is required to fit the outer winding 4 on the outer side of the inner winding 2, and the foil winding transformer is strong. It is difficult to achieve proper integration, and the fitting work requires high skill and equipment.

Although it is possible to eliminate the above-mentioned fitting work by continuously winding up the inner winding 2 and the outer winding 4, it is necessary to carry out the winding work without removing it from the winding machine. It is necessary to eliminate the outer insulating cylinder 6 inserted between the wire 2 and the outer winding 4.

However, since the main insulating portion 5 cannot have a strong structure as described above, without the outer insulating cylinder 6, the outer winding 4 is deformed by the tension when the outer winding 4 is wound, and the outer winding 5 is deformed. It spreads to the shape of 4 and causes anxiety about strength.

The present invention has been made in view of the above points, and it is an object of the present invention to enable continuous work of winding an inner winding and an outer winding with the winding machine mounted. The purpose is to provide a foil winding transformer.

[0009]

In the foil winding transformer of the present invention, the insulating cylinder around which the outer winding is wound is diagonally divided in half and fitted into the outer side of the main insulating portion to form the outer winding. Characterized by continuous winding.

[0010]

According to the foil winding transformer of the present invention, the outer insulating cylinder is not halved vertically but diagonally halved.
It is possible to prevent the tension of the outer winding from concentrating, prevent the divided portion from protruding inside the insulating cylinder, and prevent the main insulating portion from collapsing.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a longitudinal cross-sectional view of a main part of a foil winding transformer according to an embodiment of the present invention after winding is completed. In FIG. 1, a metal sheet and an insulating sheet are provided outside an inner insulating cylinder 1. The inner winding 2 formed by stacking and winding is wound, and the outer winding 4 formed by stacking and winding a metal sheet and an insulating sheet is wound on the outer side of the outer insulating cylinder 3 on the outer side thereof. A main insulating portion 5 is provided between the outside of 2 and the inside of the outside insulating cylinder 3.

FIG. 2 is a perspective view showing the outer insulating cylinder. The outer insulating cylinder is composed of three and three parts obtained by diagonally dividing a cylindrical shape into halves. The manufacturing procedure is as follows. First, the inner insulating cylinder 1 is attached to a winding machine (not shown), the inner winding 2 is wound on it, and then the main insulating portion 5 is formed on the outer circumference of the winding machine. The outer insulating cylinders 3, 3 which are obliquely divided are fitted from the side surface, and the outer winding 4 is wound thereon to form a foil winding.

Although the foil winding transformer consisting of two windings has been described, when a tertiary winding or the like is further wound outside, or each winding is wound in a radial direction. It can also be applied in cases.

[0014]

As described above, according to the foil winding transformer of the present invention, (1) by using the vertically divided insulating cylinder, from the inner winding to the outer winding with the winding machine installed. Consistent continuous work is possible.

(2) The half-divided insulating cylinder prevents the main insulating portion, which is difficult to use a material having high strength due to its electrical insulation structure, from being crushed by the winding tension of the outer winding.

(3) It is possible to prevent the divided portion of the insulating cylinder from projecting inward by the tension of the outer winding by not dividing the insulating cylinder in half vertically but diagonally dividing it in half.

(4) Since a plurality of windings can be wound while still attached to the winding machine, the winding work can be automated and the number of winding steps can be reduced.

The following effects can be obtained.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of a foil winding transformer of the present invention.

FIG. 2 is a perspective view of an embodiment of an outer insulating cylinder of the present invention.

FIG. 3 is a transverse cross-sectional view of a main part of a conventional foil winding transformer.

FIG. 4 is a vertical cross-sectional view of a main part of an example of a conventional foil winding transformer.

[Explanation of symbols]

1 ... Inner insulation cylinder, 2 ... Inner winding, 3 ... Outer insulation cylinder, 4 ...
Outer winding, 5 ... Main insulation part.

Claims (1)

[Claims] 1. A foil winding transformer formed by stacking and winding a metal sheet and an insulating sheet, the main insulating portion being formed on the outer periphery of the inner winding wound on the inner insulating tube, and then obliquely extending in the longitudinal direction. A foil winding transformer characterized in that the outer insulating cylinder divided into is fitted from the side, and an outer winding is wound on the outer side of the outer insulating cylinder.