CN201051437Y

CN201051437Y - Triangle transformer iron core

Info

Publication number: CN201051437Y
Application number: CNU2007200852308U
Authority: CN
Inventors: 陈育生
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-12
Filing date: 2007-06-12
Publication date: 2008-04-23
Anticipated expiration: 2017-06-12

Abstract

The utility model relates to an iron core of a transformer, in particular to a triangular iron core of transformer. The utility model is composed of three single-phase iron cores which are assembled together. Each single-phase iron core is a rectangular or square framework which is provided with an elliptic cross section, and the three single-phase iron cores form an equilateral trigone-shaped iron core, and an iron-core column and a yoke are of an integral structure. The utility model resolves the problem of increase of magnetic resistance caused by that a gap exists between the iron-core column and the yoke of insert iron cores, and also resolves the problem of over loss caused by underutilization of flat winding iron cores which have no three-phase closed magnetic circuits and cause leakage flux in A phases and B phases. The utility model is characterized by simple structure, easy manufacture, less raw material, and low manufacture cost, and is adaptable to three-phase transformers.

Description

The triangle transformer core

Technical field:

The utility model relates to a kind of transformer core, relates in particular to a kind of triangle transformer core.

Background technology:

Existing three-phase transformer iron core is divided into plug-in type and plane takeup type two big classes, the coiled three-phase transformer iron core in plane is again the improvement of carrying out on the basis of plug-in type iron core, it has overcome between the iron core column of plug-in type iron core and the iron yoke many slits, the magnetic loop of transformer core is interrupted discontinuous, causes the shortcoming of the magnetic resistance increase of iron core.But plane takeup type iron core causes A to have leakage flux to exist mutually with C mutually because there is not the closed magnetic circuit of three-phase, so iron core is not fully used, makes loss too high.

Summary of the invention:

The purpose of this utility model is, providing a kind of elder generation to be wound into three sections by the silicon strip of different in width is oval-shaped single-phase iron core, is assemblied to form the whole tri-phase iron core of 3-D triangle again by three single-phase iron cores, does not produce leakage flux.And compact conformation reduces the raw material of making greatly.Triangle transformer core easy to manufacture.

The utility model is to realize above-mentioned purpose by the following technical solutions:

This triangle transformer core is assembled by three single-phase iron cores, it is characterized in that: described single-phase iron core is rectangle or square, the cross section of the iron core column of single-phase iron core, upper yoke member and lower yoke member is oval, forms equilateral tridimensional triangle iron core after three single-phase iron core assembly units.

The utility model beneficial effect compared with prior art is:

This triangle transformer core is owing to adopt the single-phase iron core of three integral body to be assembled into equilateral tridimensional triangle iron core, both overcome between the iron core column of plug-in type iron core and the iron yoke to have the slit, causes the big shortcoming of iron core magnetic resistance.Having overcome plane takeup type iron core does not again have the closed magnetic circuit of three-phase, cause A mutually and C the leakage flux existence is arranged mutually, iron core is not fully used, and makes the problem that loss is excessive.And simple in structure, easy to manufacture, reduce the raw material of making greatly, cost is low.

Description of drawings:

Fig. 1 is the front view of triangle transformer core;

Fig. 2 is the vertical view of triangle transformer core;

Fig. 3 is the front view of single-phase iron core;

Fig. 4 is the vertical view of single-phase iron core.

Among the figure: 1, iron core column, 2, upper yoke member, 3, lower yoke member, 4, single-phase iron core.

Embodiment:

This triangle transformer core is by three identical single-phase iron cores 4 assembled (referring to accompanying drawing 1-2).Single-phase iron core 4 connects the back from beginning to end by several silicon steel sheets of different in width and reels and make.Silicon steel sheet begins to reel from the narrowest steel band in the winding process, at first with the coiling back, top and itself welding of first silicon strip, carries out coiling again, and the head and the tail of every silicon strip connect the inferior arc-welding welding of employing.In the winding process, silicon strip is earlier wide from being too narrow to, and carries out coiling by wide to narrow again, make the inclined-plane of outer surface of the single-phase iron core 4 that turns at 45, the single-phase iron core 4 of coiling also can change its specification according to the size of capacity, promptly changes the size of what and material of the number of turn.On make-up machine it is adopted the both sides extruding then, the method that both sides stretch is made into rectangle or square (as shown in Figure 3-4), makes the cross section of iron core column 1, upper yoke member 2 and the lower yoke member 3 of single-phase iron core 4 become elliptical shape.After the single-phase iron core after the moulding 4 annealing, again with three single-phase iron cores 4 by the corresponding in twos 3-D triangle that is spliced in 45 ° of inclined-planes of iron core column 1, promptly make this triangle transformer core.

Claims

1. triangle transformer core, it is assembled by three single-phase iron cores (4), it is characterized in that: described single-phase iron core (4) is rectangle or square, the cross section of the iron core column (1) of single-phase iron core (4), upper yoke member (2) and lower yoke member (3) is oval, forms equilateral tridimensional triangle iron core after three single-phase iron cores (4) assembly unit.