CN103680835A

CN103680835A - Iron core for transformer

Info

Publication number: CN103680835A
Application number: CN201210338725.2A
Authority: CN
Inventors: 陆明岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-13
Filing date: 2012-09-13
Publication date: 2014-03-26

Abstract

The invention discloses an iron core for a transformer. The iron core comprises two semicircular iron core bodies (1), and two magnetized cuboid permanent magnetic ferrite pieces (2) and (2') are placed between the two joint surfaces of the two semicircular iron core bodies, wherein the two joint surfaces of the two semicircular iron core bodies are in butt joint. The directions of magnetic fields generated by the two permanent magnetic ferrite pieces in the two semicircular iron core bodies are consistent with each other, and the directions of the magnetic fields generated by the two permanent magnetic ferrite pieces are opposite to the direction of the magnetic field generated by a direct current in a transformer winding. Because part of the magnetic field generated by the direct current in the transformer winding is counteracted by the magnetic field generated by permanent magnetic ferrite magnetic cores, a larger direct current can pass through the transformer winding. Through the method, the direct current bias characteristic of the transformer can be greatly improved, and a larger direct current can be allowed to pass through the transformer.

Description

A kind of transformer is with unshakable in one's determination

Technical field

The present invention relates to a kind of iron core, relate in particular to a kind of transformer with unshakable in one's determination.

Background technology

At present, in high-frequency circuit, generally use unshakable in one's determination as transformer, develop rapidly along with electronic technology, require electronic devices and components constantly to miniaturization and high power future development, in order to meet this growth requirement, require transformer to allow the direct current that passes through increasing, and this tends to cause the significantly decline of Transformer Winding inductance, thereby transformer cannot normally be worked.For preventing the generation of magnetic saturation phenomenon, must improve the DC superposition characteristic of transformer, traditional method is in the magnetic circuit of magnetic core, to open one section of air gap, although this method can be improved the DC superposition characteristic of transformer to a certain extent, improved degree is very limited.For being operated in the transformer with larger direct-current component, cannot adopt in this way, because the air gap in iron circuit, can not open very greatly, otherwise inductance is very low, and leakage field is very large, to other electronic devices and components, can produce certain electromagnetic interference.

Summary of the invention

Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of electronic circuit transformer that can be applied to have larger direct-current component is provided.

The technical solution adopted in the present invention is: the present invention includes two semicircular ring iron cores of docking mutually, between two faying faces that mutually dock of semicircular ring iron core, respectively put a rectangular-shaped permanent-magnet ferrite sheet having magnetized, these two permanent-magnet ferrite sheets are consistent at two semicircular ring inner magnetic direction producing unshakable in one's determination of docking, and the magnetic direction that its magnetic direction producing produces with direct current in Transformer Winding is contrary.

The invention has the beneficial effects as follows: the magnetic direction that the magnetic direction producing in two semicircular ring inside unshakable in one's determination of docking due to these two permanent-magnet ferrite sheets produces with direct current in Transformer Winding is contrary, therefore, offset in some magnetic field being produced by permanent-magnet ferrite sheet, the magnetic field that in Transformer Winding, direct current produces, thereby can make in Transformer Winding by larger direct current.By the inventive method, can greatly improve the DC superposition characteristic of transformer, transformer can be allowed by larger direct current.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the invention will be further described.

Fig. 1 is that two semicircular ring iron cores are combined into core construction schematic diagram with two permanent-magnet ferrite sheets.

Embodiment

In Fig. 1, two semicircular ring iron cores 1, between its two faying faces that mutually dock, be placed with two rectangular-shaped permanent-magnet ferrite sheets 2 and 2 that magnetized ', the magnetic direction that these two permanent-magnet ferrite sheets produce in two semicircular ring iron cores is consistent, and the magnetic direction that its magnetic direction producing produces with direct current in Transformer Winding is contrary.Because offset in some magnetic field being produced by permanent-magnet ferrite sheet, magnetic field that direct current in Transformer Winding produces, thereby can make in Transformer Winding by larger direct current.By the inventive method, can greatly improve the DC superposition characteristic of transformer, transformer can be allowed by larger direct current.

Claims

1. a transformer, with unshakable in one's determination, is characterized in that: comprise two semicircular ring iron cores (1), between its two faying faces that mutually dock, be placed with two rectangular-shaped permanent-magnet ferrite sheets (2) and (2 that magnetized '), the magnetic direction that these two permanent-magnet ferrite sheets produce in two semicircular ring iron cores is consistent.