JPS62169313A - Transformer - Google Patents

Abstract

PURPOSE:To enable a dimension of a bobbin in the winding width direction and that of a core in the main magnetic path direction to be reduced, by bending insulating films, by which insulation length can be secured between wires wound and plurally divided in the direction parallel to the main magnetic path of a transformer, in the direction vertical to the winding width direction at the both ends of the with direction. CONSTITUTION:The title transformer is composed of a core 11, a bobbin 12, primary winding 13 divided in two, a secondary winding 14, insulation film 15 between both windings, and a winding cover 16. The insulating films 15 between both windings are bent in the direction vertical to the winding width direction at both ends in this direction, securing insulation length between the primary windings 13 and the secondary windings 14, the primary windings 13 and themselves, or the secondary windings 14 and themselves. A dimension of the bobbin 12 in the winding width direction and that of the core 11 in the main magnetic path direction can be reduced by bending the insulating films 15 in the vertical direction to the winding width direction at both ends in this direction. Because insulation between the core 11 and the winding parts can be also realized at the curved parts of the insulating films 15, the collar part vertical to the winding width direction of the bobbin 12 can be made smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transformer used in a power supply device v1 used in all fields.

BACKGROUND OF THE INVENTION In recent years, V4 power supplies have been widely used in various fields, and transformers are always used in these power supply devices. below,
A conventional transformer will be explained with reference to the drawings.

Figure 4 shows the cross section of a conventional transformer. In Figure 4, 1 is the core, 2 is the bobbin, 31 is the primary winding divided into two parts, 4 is the secondary winding, and 5 is the winding. Q: Insulating tape, 6 is the winding cover.

In such a structure, in order to ensure an insulation distance, the inter-winding insulating tape 5 has a longer dimension distance than the windings 3 and 4 in the winding width direction.

Problems to be Solved by the Invention In such a conventional configuration, since the insulation distance is taken only in the winding width direction (main magnetic path direction), the winding width direction dimension of the bobbin 2 and the main magnetic path direction dimension of the core 1 are was getting bigger.

In view of these points, it is an object of the present invention to provide a transformer in which the dimensions of the bobbin in the winding width direction and the dimensions of the core in the main magnetic path can be reduced.

Means for Solving the Problems The present invention solves the above problems by winding a wire in a direction parallel to the main magnetic path direction of the transformer and dividing it into a plurality of pieces υ1 parallel to the main magnetic path between the δ wires. The insulating film that ensures the insulation distance is bent at both ends in the width direction in a direction perpendicular to the winding width direction.

Effect of the Invention With the above-described configuration, the present invention can make the dimensions of the bobbin in the winding width direction and the core in the main magnetic path direction smaller than those of the conventional structure in which the insulation distance is taken only in the winding width direction.

Embodiment One embodiment of the present invention will be described based on the drawings. 1st
The figure shows a cross-sectional view of the transformer of the invention.

In Figure 1, 11 is the core, 12 is the bobbin, and 13 is the 2
The divided primary winding, 14 is a secondary winding, 15 is an inter-winding insulation film, and 16 is a winding cover. This 14-wire insulation film 15 is bent in a direction perpendicular to the winding width direction at both ends in the winding width direction, and is bent between the primary winding and the secondary winding, and between the primary winding and the secondary winding e1. Insulation distance (IEC
-VDE-C8A-UL- The insulation distance tn> specified in the safety standards under the Electrical Appliance and Material Control Law is ensured. In the inter-winding insulating film 15 shown in 1) in FIG. 1, the outside III valley 1 of the primary winding 3 which is divided into two! The outer insulating film 15a between the QMI and the secondary winding 4 is partially bent in the direction perpendicular to the winding width direction in order to increase the insulation creepage distance. It is assumed that the inner insulating film 15b between the winding layer and the secondary winding 4 has been deformed so as to partially match the winding width direction dimension.

FIG. 2 shows a half cross-section 1 of the inter-winding insulating film 15 with both ends bent in a direction perpendicular to the six-width direction.

This is a three-layer structure in which one insulating film 15 is made up of 3 mm of film, and the brim part bent perpendicular to the winding width direction is one layer. Formed by the outermost layer of the film. This inter-winding insulating film 15 is formed using thermoplastic, for example, relatively inexpensive polyester resin.

FIG. 3 shows its external appearance, and the inner diameter d is formed to be slightly larger than the outer peripheral diameter of the winding to be inserted. This is to facilitate the insertion of an insulating film during transformer manufacture, and it is appropriate that the inner diameter d is approximately 0.2 to 0.03 mm larger than the outer diameter of the winding.

In this way, since the cylindrical insulating film with a flange formed in advance to have a three-layer structure is inserted, there is no need to scrape the insulating tape, which was often done in the past, and the transformer manufacturing time is shortened. Further, since the insulating film is simply inserted, automation is also possible.

Furthermore, since the insulating fill 18 is bent in a direction perpendicular to the winding width direction at both ends in the winding width direction, the dimensions of the bobbin in the winding width direction and the dimensions of the core in the main magnetic path direction are reduced. Further, since the bent portion of the insulating filter also serves as insulation between the core and the winding portion, the flange portion perpendicular to the winding width direction of the bobbin can be made wider.

Effects of the Invention As described in 1, the present invention can reduce the widthwise dimension of the bobbin and the dimension of the core in the main magnetic path direction by a simple method, and is extremely suitable for use in practical applications.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a transformer in an embodiment of the present invention;
Figures 2a and 2b show 3 of the interwinding insulating film used in the present invention.
A side view J3 of the layer mi plane and an A-AIgi plane view of layer A, FIG. 3 is an external view thereof, and FIG. 4 is a sectional view of a conventional transformer. 11... Core, 12... Bodon, 13... 2 minutes x
11 primary winding, 14...secondary winding, 15...
Interwinding insulation film agent Yoshihiro MorimotoFigure 1 L 15 ・-11ji f14Apht4<Funochino L-
(14, Figure 2) (2 Figure 3 Figure 4)

Claims (1)

[Claims] 1. An insulating film is installed at both ends in the winding width direction to ensure the insulation distance between the windings of a transformer that is wound parallel to the main magnetic path and has multiple windings divided parallel to the main magnetic path. A transformer bent perpendicular to the winding width direction.