CN2212827Y - Winded iron core - Google Patents

Abstract

The utility model relates to a winded iron core formed of aequilate linear steel belts through winding with a step-shaped cross-section. Observing from the step-shaped cross-section, the vertex angles of the step winded by two narrowest and closest steel belts falls on the circumference of an asymptotic ellipse, while the rest vertex angles of the step winded by the steel belts all falls on the circumference of the asymptotic ellipse. Assembled with a cylinder framework, the steel belts of the winded iron core can not loosen or fall off during high-speed rotation. The material of the steel belts adopts aequilate linear steel belts with utilization rate of 95%-96%, while a blanking cutting knife cuts the steel belts in a linear mode with high cutting efficiency and small wear.

Description

Winded iron core

The utility model relates to a kind of Wound core of transformer.

Existing transformer core has three kinds, be three kinds of E type punching iron cores, C type Wound core, R type Wound core, wherein E sections core and C sections core are because of the characteristic of structure and manufacturing process causes the noise of product big, magnetizing power is big, temperature rise, power consumption is big, efficient is low, and this type of iron core also has manufacturing process complexity, production efficiency low, defectives such as the consistency of performance difference of iron core.And every performance index of R sections core have greatly improved than E type and C sections core and improve, but because of the cross section of its iron core is circular, so when making, the curve steel band of the nonlinear change wide in the middle of the used steel band of reeling must be divided into, that two ends are narrow.The consumption of steel band is increased, and general utilization has only 60-75%, as described in Chinese patent 92241551.X.Adding man-hour, this cutting knife of steel band material down is curved motion, so the wearing and tearing of cutter are big, cutting efficiency is low; Then its production cost must improve, make selling price behind the transformer then far above the transformer that adopts C type and E sections core, therefore general electron production factory can not use R sections core transformer fork-like farm tool used in ancient China to make electronic product in a large number, thereby has influenced being extensive use of of R sections core.

The purpose of this utility model is that the Wound core that a kind of performance is good, cost is low will be provided.

The utility model is to implement like this:

According to the basic calculation of " electromagnetism " indication, determine the physical dimension of iron core according to the iron core capacity.Calculating on the cross section of this Wound core to have N ladder, and N is odd number (N=5,7,9 ...), its N= $\sqrt{k{}_{N}D}$ , K wherein _NBe constant, generally be decided to be 0.6-1.2; D is the core section diameter.

Wound core should have the magnetic steel band of (N+l)/2 kind of different in width, obtains the thickness and the width of steel band of each ladder then with special-purpose formula, and the THICKNESS CALCULATION formula of ladder is:

H _1-n=K _tD/N; K _tBe 0.65-1.8;

The width B of ladder=

Steel band is cut into the wide straight line steel band material of several width specifications according to the top data that calculate fork-like farm tool used in ancient China.The wide straight line steel band of this different in width is fixed on again and can keeps being wound to the wideest steel band by narrow steel strip on the constant special fixture of core center axis, from then on the wideest again being wound to is the narrowest, reels successively, forms iron core at last.

The cross section of this kind iron core, no matter it has several ladders, the drift angle of each ladder all can drop on one by in the asymptotic oval-shaped circumference of circle.On this cross section, find out, the narrowest steel band ladder drift angle and the second narrow steel band ladder drift angle close with it should drop on the oval periphery of the asymptotic ellipse of this circle and go up (the imaginary point bank line in the accompanying drawing 4), and the drift angle of remaining steel band ladder all should drop on the circumferential edge of this asymptotic ellipse (the dotted line camber line in the accompanying drawing 4).

To the joint of the steel band of different in width, available normally used bridging type or welded type join during coiling.

The Wound core of making at last in the time of will can not taking place to collide iron core because of the skeleton high speed rotating, makes the iron core strip deformation, gets loose when the coiling of supporting cylinder frame.Because this Wound core is rolled into a plurality of stepped steel coil strip pieces and forms steel band is folded, except that the outside of the narrow steel strip ladder of coiling initial sum end part and inboard no steel band clamping, other each steel band ladder is all clamped by the steel band ladder of both sides.

After joining two cylinder frames at the iron core overcoat, iron core should maintain a certain distance with the inner periphery of skeleton cylinder.So when skeleton cylinder high speed rotating, Wound core may collide with skeleton, but the drift angle that drops on the steel band ladder on the circumferential edge can not make strip deformation, get loose after collision, that is because steel band is compressed around ladder block by the steel coil strip of the left and right sides, and the narrowest steel band drift angle place nothing of the left and right sides, cross section compresses, if can make strip deformation loosening through collision, so design of the present utility model is that two the narrowest close steel coil strip are dropped on the oval periphery of an asymptotic ellipse around the drift angle of ladder; Even then skeleton and iron core collision also can only be collided the drift angle on the asymptotic oval circumferential edge, and be bumped less than the drift angle on the oval periphery of asymptotic ellipse, the narrowest ladder strip deformation and loosening phenomenon so just can not take place.

Because the stepped space that forms between circle and each steel band ladder in the skeleton cylinder has than the bigger radiating surface of existing iron core formation, so the temperature rise of this kind Wound core is than low with the temperature rise of E, the C of power, R sections core.

Adopt the Wound core of the utility model indication, have the good electric magnetic property of R sections core, and its area of dissipation is big, temperature rise is low; Because the linearly wide shape of steel band, then the raw-material utilance of steel band can be to 95-96%, and improves 20-35% than the steel band utilance of R sections core.Thereby cost of manufacture greatly descends, and makes its universal use on each electronic product become possibility.

Elaborate below in conjunction with the Wound core of accompanying drawing the utility model indication.

Accompanying drawing 1 is the profile schematic diagram of this Wound core assembling skeleton coiling electromagnetic wire;

Accompanying drawing 2 is profile schematic diagrames of this Wound core;

Accompanying drawing 3 is cross section (A-A) schematic diagrames of this Wound core;

Accompanying drawing 4 is these Wound cores and cross sectional representation after cylinder frame cooperates.

With reference to accompanying drawing, a kind of Wound core is to be reeled on a special fixture by the steel band (1) of different in width to form, its steel coil strip around after cross section stepped, each steel coil strip is around the drift angle (K of the ladder that forms _N-N-1, K ' _N-N-1) should drop on the oval periphery of an asymptotic ellipse, and the drift angle (K of remaining steel band ladder _1-N-2, K ' _1-N-2) should drop on the circumferential edge of this asymptotic ellipse, cover is joined two cylinder frames (2) on the both sides of Wound core, keeps certain staircase rectilinear clearance between Wound core (1) and the skeleton (2).

When the bobbin fast rotational, the steel coil strip of iron core (1) is around ladder ladder drift angle (K placed in the middle _1-N-2) may collide with the inner periphery limit of cylinder frame, so will collide the ladder drift angle (K that also can only collide on the circumferential edge that drops on this asymptotic ellipse _1-N-2), and bump less than the steel band drift angle (K on the oval periphery that drops on asymptotic ellipse _N-N-1, K ' _N-N-1), that just reaches the purpose that can not make this part steel band be out of shape when rotated, get loose.Owing to be formed with enough stepped gaps between Wound core (1) and the cylinder frame (2), its area of dissipation greatly increased.

Be wide linearity because of the steel band that this Wound core adopted again, save steel band than nonlinear curve band material and reach 20-35%, and because of cutting tool no longer moves along a curved path, and moving linearly, the cutting efficiency of cutter is greatly improved, the corresponding prolongation of the life-span of cutter.

When making iron core, the physical dimension of iron core is determined by the iron core capacity; The width of steel band, the thickness of steel band all are fixed with special-purpose formula calculating.The ladder number of steel band ladder is to use N= $\sqrt{k{}_{N}D}$ Fork-like farm tool used in ancient China calculates, wherein K _NBe the ladder distribution constant, generally get 0.6-1.2.

And the step-thickness H of iron core _1-n=K _tD/N;

K wherein ₄Get 0.65-1.8.

The width B of the ladder of iron core _n=

Adopt this Wound core, not only have the good electric magnetic property of R shape iron core, and its area of dissipation is big, temperature rise is low.And manufacturing cost and price will be significantly less than manufacturing cost and the price that adopts R sections core.

Claims (3)

1, a kind of Wound core, be by steel coil strip after forming, on its both sides, add join the coiling cylinder frame form, it is characterized in that this steel coil strip around after cross section be stepped; And the drift angle (K of ladder _1-N-2) should drop on the circumferential edge of an asymptotic ellipse, and the ladder drift angle (K of the narrowest close two steel bands _N-N-1) should drop on the oval periphery of this asymptotic ellipse.

2,, it is characterized in that maintaining stair-stepping gap between steel band ladder (1) on the cross section of Wound core and the cylinder frame (2) according to the Wound core of claim 1.

3,, it is characterized in that the definite of ladder number of its steel band can utilize formula N=according to the Wound core of claim 1 $\sqrt{k{}_{N}D}$ Fork-like farm tool used in ancient China determines that wherein D is the core section diameter; K _NGenerally get 0.6-1.2;

The step-thickness H of iron core _1-n=k _tD/N;

K _tGet 0.65-1.8;

The ladder width B of iron core _n=

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