CN202443818U

CN202443818U - Magnetic core for magnetic coil

Info

Publication number: CN202443818U
Application number: CN2012200880972U
Authority: CN
Inventors: 李珏莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-09
Filing date: 2012-03-09
Publication date: 2012-09-19
Anticipated expiration: 2022-03-09

Abstract

The utility model discloses a magnetic core for a magnetic coil. The magnetic core comprises a frame body and is characterized in that: the frame body has a multilayer structure formed by coiling magnetizers; each layer comprises more than three magnetizers side by side; and an insulating layer is arranged between every two layers. The belt-shaped magnetizers are coiled into a spiral structure with more than three circles, so that eddy current can be obviously reduced. Not only can the energy consumption be greatly reduced, but also hysteresis is further reduced, so that the working frequency of an electric device is improved.

Description

A kind of magnetic core of magnetic coil

Technical field

The utility model relates to the used magnetic coil in a kind of alternating current machine, the electrical equipment, specifically is a kind of magnetic core of magnetic coil.

Background technology

The conductor of bulk moves in magnetic field or is in the magnetic field of variation, all will produce induced electromotive force, forms eddy current, thereby causes bigger eddy current loss.For reducing eddy current loss, often magnetic core (iron core) is formed by stacking with many ferromagnetic conductor thin slices (for example silicon steel sheet), these sheet surfaces scribble the oxide of thin layer insulating varnish or insulation.When magnetic flux passed the stenosed section of thin slice, eddy current was limited in along some the narrow and small loop stream mistakes in each sheet, and the clean electromotive force in these loops is less, and the length in loop is longer, so just can reduce eddy current loss significantly.So, extensively adopt stacked iron core in alternating current machine, the electrical equipment.

The used iron core overwhelming majority of electrical equipment such as transformer, instrument transformer, voltage regulator adopts silicon steel sheet or silicon strip manufacturing at present.The method of making mainly contains lamination and reels two kinds.Laminated core structure is to be built up by a definite form by silicon steel sheet.This iron core is owing to exist air-gap in the magnetic circuit, defective tightness between silicon steel sheet, but also it is inconsistent to exist the high magnetic conduction direction and the magnetic circuit direction of local area material, makes the poor-performing of iron core, the transformer noload losses of processing is higher, noise is bigger.

Silicon steel sheet in the iron core of existing transformer, because of receiving condition restriction such as production, processing, installation, mechanical strength, its thickness is between 0.25 to 0.6 millimeter, so still there is bigger eddy current to exist, electric energy loss is bigger, does not meet energy conservation and environment protection.If calculate with China's gross generation every day 10,000,000,000 degree, total but the power transformation loss of pressing because of ascending, descending has layer by layer just surpassed 1/10 power consumption, and being exactly to have spent 1,000,000,000 every day more.And,, force it in narrow frequency, to work because the magnetic hysteresis that eddy current caused makes operating frequency limited for sound equipment, and can't work frequently at whole tone, in addition also because of the magnetic hysteresis phase shift, also can cause defectives such as distorted signals.

Summary of the invention

In order to overcome above-mentioned deficiency, the utility model purpose is to provide a kind of magnetic core that can reduce the magnetic coil of eddy current significantly.

To achieve these goals, the technical scheme of the utility model employing is:

A kind of magnetic core of magnetic coil includes framework, it is characterized in that: said framework is the sandwich construction that is formed by the magnetic conductor coiling, and every layer is to be made up of side by side magnetic conductor more than three; Be provided with insulating barrier between layer and the layer.

Said sandwich construction is to be formed by a ribbon magnetic conductor coiling, and every layer is by the above helical structure of banded magnetic conductor coiling three circles.

The cross section of said magnetic conductor is not more than 3mm2.

The beneficial effect of the utility model: owing to, can reduce eddy current significantly, not only greatly reduce energy loss, but also reduced magnetic hysteresis, improved the operating frequency of electrical equipment with banded magnetic conductor helical structure more than coiling three circles in every layer.

Description of drawings

Below in conjunction with accompanying drawing the utility model is done further to specify.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a vertical view shown in Figure 1.

Embodiment

Like Fig. 1, shown in 2; A kind of magnetic core of magnetic coil includes framework, it is characterized in that: said framework is the sandwich construction that is formed by the magnetic conductor coiling; Said sandwich construction is to be formed by a ribbon magnetic conductor 2 coilings, and every layer 1 is by the above helical structure of banded magnetic conductor coiling three circles.

Operation principle: factor such as the magnetic permeability of the motion of the size of eddy current loss and the variation pattern in magnetic field, conductor, the geometry of conductor, conductor and conductivity is relevant.If 1 square iron be divided into 8,16,32...... piece etc., get more for a short time, eddy current is more little, power consumption is few more.Each sheet in the magnetic core is processed thread structure, and eddy current is limited in forming narrow and small loop in each magnetic conduction silk, and the clean electromotive force in these loops is less, and the length in loop is longer, so just can reduce eddy current loss significantly.

The above is the preferred implementation of the utility model, can not limit the interest field of the utility model certainly with this.Should be pointed out that for those skilled in the art, the technical scheme of the utility model is made amendment or is equal to replacement, do not break away from the protection range of the utility model.

Claims

1. the magnetic core of a magnetic coil includes framework, it is characterized in that: said framework is the sandwich construction that is formed by the magnetic conductor coiling, and every layer is to be made up of side by side magnetic conductor more than three; Be provided with insulating barrier between layer and the layer.

2. the magnetic core of magnetic coil according to claim 1, it is characterized in that: said sandwich construction is to be formed by a ribbon magnetic conductor coiling, every layer is by the above helical structure of banded magnetic conductor coiling three circles.

3. the magnetic core of magnetic coil according to claim 1 and 2, it is characterized in that: the cross section of said magnetic conductor is not more than 3mm2.