DE2009644C - Radially laminated magnetic core - Google Patents

Description

3 '4

closed so that both parts are glued to different on the carrier organ. When sticking

Potential. The radially arranged sheets are pressed against each other so that the best

Get the fill factor for the finished core that is possible with shrink rings or multi-part clamps

held together. mid.

The invention is based on the object of providing a 5 In the manufacture of the in the base element entradially The laminated magnetic core of the sheets described at the beginning is expediently assumed to develop the same kind of band, which is simple and cheap, the width of which is equal to the width of the ger way can be produced and is in the air gap sheets. The sheets will be stretched from this strip in the core element with low eddy current. cut and with the isolated surfaces against losses can be trained. io other inserted into a magazine. The magazine has

To solve this problem, according to the invention, a pressing device through which the laminated core is supplied a radially laminated magnetic core which is initially pressed together. One long side of the magazine proposed type, which is thereby open, so that the cut surfaces of the metal sheets is free is that the concentrically arranged Hegen. A binding tape coated with glue is layered of the core element as individual rings with 15 pressed against the free cut surface of the laminated core, sheets attached to the respective carrier are the same so that all individual sheets adhere to the tape Width are formed. oleiben. The binding tape thus serves as a Tiägerorgan

The advantage of the invention over the previous one for the sheets.

applied constructions is that you get the F i g. Figure 2 shows a circular core element that

Basic element in the form of a piece of goods and all ver ao made of a number of rings 4 is made. The Rings

can produce turned sheets in the same shape. consist of one and the same basic element and

This allows a high degree of mechanization, which means that they have the same radial material thickness.

Work in the manufacture of the basic element, "The manufacture of the core element is

at the same time, the waste losses are greatly reduced. that one in a mold with the outer dimensions

From the manufactured piece goods, suitable solutions of the finished core element are made starting from

Cut lengths and shaped into rings, one ring at a time, extending its circumference

be arranged concentrically until the core element inserts the prefabricated basic element. The core

has the desired diameter. element can be sealed with an insulating tube 5

In the case of a core element according to the invention which encloses the central hole 6, all outer surfaces protrude from the cutting edges of the 30. The closure can also consist of a cylindrical individual sheet metal. This reduces the eddy current center part that is lost to the molding tool to the lowest possible degree, whatever is heard. When the core element is ready in the form, particularly advantageously in the case of the core tool already mentioned, a solvent-free resin construction is used, in which the core leg 1 is poured from a binding agent that forms all cavities between the number of circular, stacked rings and between the n individual core elements separated by air gaps, so that an absolutely compact unit is built up. With a core element according to the emerge. In order to further strengthen the core element, according to the invention, a certain air gap section can be placed in a bandage 7 around the circumference of the element several sections with very low eddy currents. The bandage can be divided from insulating losses. The invention therefore gives 40 material, e.g. B. made of fiberglass tape,
The designer has considerably greater possibilities. Resin binders are used in excess, as was previously the case, the necessary air gap distance in one that a thin kerf on the upper side of the element is split up and forms a resin layer evenly. In this layer spacers, plates made of insulating material are pressed, which then

Two embodiments of the invention are in 45 an air gap between two stacked one on top of the other

described below with reference to the drawing. Make it core elements. This last pass will

shows only applied when the finished core is made up of two or

F i g. 1 a piece of a «basic element is composed according to the several core elements and

Invention, between these should be an air gap. The required

F i g. 2 a core element, the air gap borrowed from a number of 50 can also be achieved by

Rings that have the same radial shape as one another that is made from the resin binder on the top

elongation, and the core element directly the required distance

Fig. 3 shows a core element which is formed from a number of elements.

Rings with an outwardly increasing radial shape. 3 shows a core element in which

elongation is established. 55 Manufacture one basic elements with different

The basic element 1 shown in Fig. 1 consists of thickness used. Especially with large diameters

a flexible support member 2 made of paper, knives it may be advantageous on the outside

Adhesive tape or the like. Can exist. The carrier- to arrange thicker rings. Near the center

organ is coated with glue on one side, narrow rings should be used around the

to achieve the best film factor of several sheets 3 of the same size 3 with an edge 60.

1 sheet of drawings

Claims (7)

1 2 of each core part are parallel, as a result of which at least one part of the leakage flux hits a flat core sheet surface and generates large eddy current losses there. 1. Radially laminated magnetic core with min- To avoid such losses, it is already at least one essentially circular core 5 known to be arranged element essentially radially for transformers, inductors NEN, so that the leakage flux along a Schneidod. Like. Inductive devices that can penetrate from concentric edge in the sheets. Gtm one arranged layers of a basic element of another known embodiment becomes a round one forms, which is divided into sectors from a bendable support core; pkel, with sheet metal and filled on one side with an edge of different widths. All flat, rectangular sheets made of magnetic sheets go from the *. Circumference of the thigh Shem material consists, thereby ge characteristic inward and extend to different distances draws that the concentrically arranged- · inside. The disadvantage here is that the putting together Layers of the core element as individual layers of such a core are time-consuming and costly (4) is an example of the respective carrier (2), since sheets of different widths were consolidated Sheets (3) formed of the same width must turn in order to have a reasonably good fill factor are. to obtain. Such a core must be laid by hand 2. Magnetic core according to claim 1, are thereby, which increases the manufacturing costs considerably indicates that all rings have a good fill factor in the manufacture of elements (1) with the same thickness produced 20 core legs with a circular cross-section are. "Hold has been suggested to hold the core limb 3. Magnetic core narh claim 1, thereby composed of involute-shaped curved sheets indicates that the center of the core element menzusetzen, the curvature simple or The closest rings made of basic elements can be doubled (US Pat. No. 952,105). at th (1) with a smaller thickness than the outer 25 of a Kernschenkd produced in this way Rings are made. the cylindrical part of the outer surface in the we 4. Magnetic core according to claim 1, characterized essentially by parts of the curved surfaces of the characteristic that the outer ring of the core element is formed by individual fleece. Since the stray flux to and ments is surrounded by a bandage (T) that surrounds the circumference of a leg bandage (T) produced in this way. If you pass 30 flat sheet metal surfaces, large us emerge 5. Magnetic core according to claim 1, characterized gel current losses, especially in those cases in which indicates that the core element with one leg for a reactor core with Luftspaltcn Resin binder is impregnated. and the leg from a number of one- 6. Magnetic core according to claim 1, characterized by geotherlaced circular core parts with larger ones indicates that with a magnetic core, which consists of 35 or smaller air gaps between the individual builds up two or more core parts stacked on top of one another. In such Kcrr. constructions elements is built, note that the leakage flux between the kernel elements is cutting edges of the menten spacer plates are arranged. Sheet metal should happen to avoid eddy current losses 7. Magnetic core according to claim 6, thereby keeping low. Dk known construction leads indicates that the spacer plates in connection 40 lead to excessively large losses to be practically applicable to be finished with the impregnation of the core elements. Next is the bending of the sheets and that Resin binders are made. Putting together cores or core parts too time consuming and expensive. In addition, a post-treatment in the form of stress relief annealing is er-45 necessary, since the bending of the sheets causes a cold represents machining. In the case of the known arrangement mentioned at the beginning (German Auslegeschrift 1 253 351), a carpet-like Basic element produced, which is wound in spirals to form an essentially round core. The invention relates to a radial lamel- The basic element is obtained in that the lierttn magnetic core with at least one essentially sheet metal lamellae on one side with a: sheet metal edge on a borrowed circular core element for transformer winding hair band-shaped base are applied, gates, choke coils or. . to a round the core to maintain the like inductive devices must teppichaus the concentrically arranged layers of a 55-like basic Accordingly, at its outer ends ^u:; The basic element is formed, which can be made from a bending-decreasing thickness. In addition, the length of the element must be determined on one side with an edge on one side of the carrier, fixed flat, rectangular sheets of magnetic material / the correct diameter of the core adhered to table material exists (German Auslegeschrift is when the element is rolled up. At the beginning 253 351). 60 and at the end additional wedge-shaped filling With inductive devices you have to attach the desired elements. Obtaining this type of core values for the inductance of the apparatus, however, is complex and expensive to manufacture.
the core with one or more air gaps. From German patent 730 718 it is see, by looking at at least part of the ma also known, at a high voltage power table Circle divided into several core parts 65 transformer one. Core legs as radially laminated and to build them up into a vertical core leg with a column, which is supported by a coaxial insulating spacer plates Made of non-magnetic material between the jacket is divided into two parts. Each of these parts has stacked the core parts on top of each other. All sheets are attached to a different point of the winding.