SU1764088A1 - Planar magnetic circuit - Google Patents

Description

one

(21) 4782898/07; 4800355/07

(22) 01/15/90

(23) 01.22.90

(46) 09/23/92. Bul No. 35

(75) M.A. Nagorny

(56) Japanese Patent No. 49-42605,

cl. H01 F 27/24, 1964.

R.X.Val n. Transformers of low power, M ,: Soviet radio, 1971, p.96.

(54) PLANAR MAGNETIC WIRE (57) Uses: in electrical engineering. SUMMARY OF THE INVENTION: The plenary magnetic conductor is made of electrical steel tape 1 wound and pressed into a roll. Holes are made in the roll, the placement and dimensions of which correspond to the placement and dimensions of the windows 5 and 6 of the magnetic circuit. 5 il.

The invention relates to electrical engineering and can be used in the manufacture of magnetic cores for transformers, chokes, and other induction equipment.

The purpose of the invention is to simplify the manufacturing technology.

This goal is achieved by the fact that the planar magnetic circuit of the induction apparatus, made of an W-shaped twisted electrical steel steel tape, is made of a single extruded roll in which the tape layers are laid flat, parallel to the longitudinal section plane. Making the magnetic core twisted from one planar reel simplifies the technology and shortens the manufacturing time.

Fig. 1 shows a roll of electrical steel tape from which the magnetic core is made; in Fig.2 and 3 - a variant of the design of the magnetic circuit with the placement of the rods across the rolling; 4 and 5 show a variant of the design of the magnetic circuit with the placement of the rods along the rolling sheet.

The planar magnetic circuit of the induction apparatus is made of electrical steel strip 1 (see Fig. 1), wound and pressed into a roll. The width of the tape from which the roll is wound is equal to the height of the magnetic circuit. The roll in the compressed state is made of a thickness equal to the diameter of the rods 2-4 (Figures 2 and 3) of the magnetic core. 2 - 4 and PM 7 and 8 of the magnetic circuit. Figures 2 and 3 show the structure and general view of the magnetic core with windows 5 and 6 made in the roll. At the end of the winding and crimping of the roll, the beginning and end of the roll tape are fixed by spot welding in several places. The final adjustment to the specified dimensions is carried out if necessary, for example, by milling. The configuration of the end parts of the magnetic circuit and the partially circular cross section of the outer rods 2 and 4 are formed in

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account winding flax you roll. In this case, there is no need to process them from the front sides of the magnetic circuit. The specified sections of the middle rod 3 and partly extreme rods 2 and 4 are formed when windows 5 and b are being made. Plenary magnetic core with the placement of the rods along the rolling is made of rolled electrical steel strip 1 (see Figures 4 and 5), wound and pressed into a roll. The roll is made with a thickness equal to the diameter of the rods 2-4 of the magnetic circuit. In this embodiment, the width of the roll tape is equal to the length of the magnetic circuit, and the length of the wound roll - its height. The end sides of the coil are machined in accordance with the configuration of its extreme rods 2 and 4. Holes are made in the coil, the placement and dimensions of which correspond to the placement and dimensions of the magnetic conductor windows 5 and 6, at which the specified dimensions and configuration of the rods and PM of the magnetic core are achieved. Windows 5 and 6 of the magnetic core are configured so that the cores of the magnetic core are placed along the rolling line of the electrical steel coil tape. Figures 4 and 5 show the structure and general view of the magnetic circuit with the windows made in a roll

5 and 6 and rods placed along the rolled products. Processing the end sides of the magnetic circuit and making windows in it can be carried out in the tape also during its winding into a roll or after winding and crimping the roll is done by cutting it into windows and externally, for example, laser cutting. Crimping the coil can be done by providing cooling channels along its rods (not shown in the figures). After winding the tape into roll 1 (see Fig. 5) and crimping it, the beginning and end of the roll tape are fixed, for example, by means of spot welding. After processing the end sides of the magnetic circuit and making the windows 5 and

6 in the compressed roll, the final adjustment to the given overall dimensions is carried out, if necessary, also, for example, by milling. Further operations for the manufacture of the magnetic core (annealing, banding of the rods, impregnation with hardened synthetic resin, roasting, etc.) are similar to those known for use in the manufacture of magnetic conductors. The manufacture of a magnetic circuit does not require special preparation and can be carried out in small areas, and also does not require a large investment of time. Waste when making windows in a tape are rectangular in shape and can be used in the manufacture of related products containing cores made of electrical steel in their construction. For work

The magnetic cores on its cores wind the windings in a known manner, fasten them with respect to the cores and the PM, are interconnected in a certain way and apply a voltage. The current passing through the primary winding forms a magnetic flux in the magnetic core, which induces an electromotive force in the secondary winding. The implementation of the planar magnetic circuit in the form of a single design from one roll allows to simplify the manufacturing technology by performing one ring, reducing the routine operations that occur in the analog and eliminating the need to perform the tape

complex configuration compared to the prototype. The advantage of the proposed design is also in reducing the magnetization loss by approximately 15-20%. Thus, in a magnetic core made of three wound rings (frames), magnetic fluxes in each of the frames pass along magnetic tapes, but their transition from one frame to another requires intersecting the technological gap between the tapes and the tape layers themselves. transverse direction. Such a path is a large magnetic resistance and the flows passing from frame to frame do not exceed a few percent.

therefore, practically these streams can be considered autonomous, and thus, unlike the proposed magnetic circuit, two independent streams coexist in each rod, shifted in phase, which leads to an increase in magnetization losses both in the rods and in the rods. The proposed magnetic circuit is devoid of these disadvantages. Improving the reliability of the magnetic circuit achieved for

an account of the unity of the design and exclusion of the fastening elements of the component parts of the magnetic circuit. The absence of joints between rmami and the cores of the magnetic circuit also allows to increase its stability

jolts, shocks, vibrations. The greatest effect can be obtained when using cold-rolled steel of predominantly cubic structure.

The proposed technical solution makes it relatively easy to carry out the process of mechanization of the manufacture of the magnetic circuit. The design of the magnetic circuit also lends itself to the automation of its manufacture.

Claims (1)

Claim Plenary magnetic core of the induction apparatus, made W-shaped, twisted from electrical steel tape, characterized in that simplification of manufacturing technology, the magnetic core is made of a single compacted coil in which the tape layers are laid flat, parallel to the longitudinal section plane. eight 1 ftsg.Z b 6 eight figl CQ B § one  -J h: ° 0 r I i C