CN102646495A

CN102646495A - Method for reducing eddy current generated by magnetic core in magnetic coil

Info

Publication number: CN102646495A
Application number: CN2011100451252A
Authority: CN
Inventors: 李珏莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-02-22
Filing date: 2011-02-22
Publication date: 2012-08-22

Abstract

The invention discloses a method for reducing an eddy current generated by a magnetic core in a magnetic coil. The method comprises the steps of: A, selecting a permeability magnetic material; B, pressing or drawing the permeability magnetic material in the step A into permeability magnetic wires with cross section areas of not more than 6mm<2>; C, arranging insulation layers on the peripheries of the permeability magnetic wires made in the step B; and D, setting the permeability magnetic wires with the insulation layers into a shape of the magnetic core required by an appliance, then overlapping a plurality of permeability magnetic wires with the shapes of the magnetic cores into a magnetic core, or winding the permeability magnetic wires with the insulation layers into a magnetic core required by the appliance. Because a permeability magnetic sheet is changed into the permeability magnetic wires, the eddy current is limited in some narrow loops in the wires to flow, and the loops have smaller pure electromotive force and longer lengths, thus the eddy current can be remarkably reduced, energy loss is greatly lowered, hysteresis is also reduced, and working efficiency of the appliance is increased.

Description

The magnetic core in the coil of deperming produces the method for eddy current

Technical field

The present invention relates to a kind of method that permeability magnetic material produces eddy current that reduces, specifically is the method for the magnetic core generation eddy current in a kind of used magnetic coil that reduces in alternating current machine, the electrical equipment.

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 bigger, so just can reduce eddy current loss significantly.So, extensively adopt stacked iron core in alternating current machine, the electrical equipment.

But; Silicon steel sheet in the iron core in the electric equipments such as existing motor, 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 object of the invention is to provide a kind of method that permeability magnetic material produces eddy current that reduces.

To achieve these goals, the technical scheme of the present invention's employing is:

The magnetic core in the coil of deperming produces the method for eddy current, may further comprise the steps:

A, choose permeability magnetic material;

B, with the permeability magnetic material in steps A compacting or be drawn into the magnetic conduction silk that cross-sectional area is not more than 6mm;

The outer periphery insulating barrier of C, the magnetic conduction silk processed at step B;

D, the magnetic conduction silk that will have an insulating barrier are set as the needed core shapes of electrical equipment, and the magnetic conduction silk with a plurality of core shapes is superimposed as magnetic core then, and the magnetic conduction filament winding that perhaps will have insulating barrier is processed the needed magnetic core of electric equipment.

Beneficial effect of the present invention: the inventive method is owing to the version that magnetic conduction sheet has been made into the magnetic conduction silk; Eddy current is limited in along some the narrow and small loop stream mistakes in each, and the clean electromotive force in these loops is less, and the length in loop is longer; So just can reduce eddy current significantly; Not only greatly reduce energy loss, but also reduced magnetic hysteresis, improved the operating frequency of electrical equipment.

Description of drawings

Below in conjunction with accompanying drawing the present invention is done further detailed description.

Fig. 1 is the structural representation of magnetic core in the single-phase transformer of the embodiment of the invention 1;

Fig. 2 be shown in Figure 1 along A-A to cutaway view;

Fig. 3 is the structural representation of magnetic core in the three-phase transformer of the embodiment of the invention 2;

Fig. 4 be shown in Figure 3 along B-B to cutaway view.

Among the figure: 1, magnetic core; 2, silicon steel silk; 3, wire frame.

Embodiment

Embodiment 1: reduce the method for the generation of the magnetic core in magnetic coil eddy current in the single-phase transformer, may further comprise the steps:

A, utilize silicon steel material to be permeability magnetic material, and permeability magnetic material is processed magnetic conductive pole, this magnetic conductive pole is exactly the silicon steel bar;

B, with the silicon steel bar in steps A compacting or draw the square magnetic conduction silk that becomes 0.2 * 0.2mm, also can be described as the silicon steel silk;

Insulating barrier is wrapped in the periphery of C, silicon steel silk that step B is processed;

D, the silicon steel silk that will wrap insulating barrier are designed to the core shapes of annular, and the silicon steel silk 2 with a plurality of core shapes is superimposed as magnetic core 1 then, and the magnetic core of the individual event transformer of processing is like Fig. 1, shown in 2.

Embodiment 2: the magnetic core in the magnetic coil of minimizing three-phase transformer produces the method for eddy current, may further comprise the steps:

B, with the silicon steel bar in steps A compacting or be drawn into the square magnetic conduction silk that diameter is 0.2 * 0.2mm, also can be described as the silicon steel silk;

D, the shape of utilizing numerical control filament winder will be surrounded by the silicon steel silk of insulating barrier turn to the shape of wire frame 3, and the shape of the magnetic core of then that 3 assemblies of three wire frames are complete three-phase transformer is like Fig. 3, the shape shown in 4.

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.

Though described execution mode of the present invention in conjunction with accompanying drawing; But those skilled in the art can make various distortion or modification within the scope of the appended claims; As long as be no more than the described protection range of claim of the present invention, all should be within protection scope of the present invention.

Claims

1. the magnetic core in the coil that deperms produces the method for eddy current, it is characterized in that: may further comprise the steps:

Choose permeability magnetic material;

The magnetic conduction silk that cross-sectional area is not more than 6mm is suppressed or be drawn into to permeability magnetic material in the steps A;

The outer periphery insulating barrier of the magnetic conduction silk of processing at step B;

2. the magnetic core in the coil that deperms according to claim 1 produces the method for eddy current, and it is characterized in that: the magnetic conduction silk among the said step B is circular or square or polygon.