SU1198580A1 - Three-phase transformer - Google Patents

Abstract

A THREE PHASE TRANSFORMER containing a base, a spatial magnetic core made of three twisted O-shaped elements, the conjugate straight-line portions of which form rods, and the non-conjugate rods of magnetic wires, the windings placed on the rods of the magnetic circuit, and the lower ends of the windings with the outer side is placed and fastened on the supporting elements fastened to the base, the upper and lower clamps fastened by a pin extending along the central axis of the magnetic circuit, while the upper clamp abuts against The cores of the magnetic circuit, characterized in that, in order to reduce energy losses by improving the electromagnetic characteristics of the magnetic circuit and reducing the complexity of manufacturing, the transformer is equipped with insulating spacer elements placed between the upper magnetic cores and the upper ends of the windings, and the lower ends of the windings are internally supported on the second clamp.

Description

The invention relates to electrical engineering, in particular to three-phase transformers on a spatial magnetic circuit.

The aim of the invention is to reduce energy loss by improving the electromagnetic characteristics of the magnetic circuit and reducing the complexity of manufacturing a transformer.

In FIG. 1 schematically shows the proposed transformer, front view; in FIG. 2 - the same, with the cover and casing removed, top view; in Fig.3 - windings with a magnetic circuit before impregnation and baking during their fixation.

The proposed three-phase transformer contains a spatial magnetic circuit 1, consisting of three O-shaped elements, the conjugate rectilinear sections of which form the rods 2, and the non-conjugate yokes 3 of the magnetic circuit 1. Windings 4 are wound on the rods 2. Windings 4 are placed between the upper welded frame 5 and the supporting elements 6, welded to the base 7, and the frame 5 and the supporting elements 6 are pulled together by pins 8 located on the outside between the windings 4. Between the upper yokes 3 and the upper ends of the windings 4 spacer elements 9 are inserted. the central axis passes the coupling pin 10 with the upper clamp 11, resting on the upper yoke 3, and with the lower clamp 12, on which the lower ends of the windings 4 are supported.

In the manufacture of the proposed transformer after winding the windings 4 into the magnetic circuit 1, they are fixed on it with the help of a central pin 10, upper 11 and lower 12 clamps and spacer elements 9. In this case, the fixing of the windings 4 begins with the upper clamp 11 (clamp, which after the assembly of the transformer is based on the upper yokes 3) with the central pin 10, a magnetic circuit 1 with windings 4 is installed, inserted between the yokes 3 (yokes, which after the end of the assembly of the transformer become upper) and the windings 4 are spacer inserts ki 9, is then mounted and pressed against the lower clamp them windings 4 to magnetic circuit 1 through the insert 9.

The windings 4, fixed on the magnetic circuit 1, are impregnated and baked on the feed line, hanging ⁵ windings with the magnetic circuit by the central pin to the conveyor or by installing a section of the conveyor moving cyclically through the impregnation line.

After impregnation and baking, the windings, 10 fixed on the magnetic circuit, go to the transformer assembly. They are installed on the supporting elements 6 of the base 7, then the windings 4 are pressed in by installing the upper frame 5 on them and pulling it together with the supporting elements 6, the tie rods 8. ^{15 The} proposed transformer has less energy loss, since it has better electromagnetic characteristics compared to the prototype due to the fact that it lacks vertical ₂₀ crimping of the magnetic circuit 1 and eliminated stresses in the steel of the magnetic circuit 1.

If in the known transformer the magnetic circuit 1 is pressed between the upper clamp and the base with the help of a central pin passing through the base25, and the windings are pressed between the frame and the base with the help of tie rods, then in the proposed transformer the windings 4 are pressed between the upper frame 5 and the supporting elements 6 s by means of pins 8 and fastened to the base 7, and the magician ^{30 the} nitro line is suspended on the windings 4 by the upper yoke 3 and mounted on the windings 4 using clamps 11, 12, spacers 9 and the central pin 10.

Production proposed transformer significantly less laborious ³⁵ compared with the known, since it eliminates the need for a process device for impregnating and zapechki windings with a magnetic core, and therefore does not waste time and materials for its production, 40 to assemble and disassemble it before and after impregnation and baking each active part, to prepare the technological device before each use (removal of varnish from the previous baking).

FIG. g.

VNIIIPI Order 7727/51

Branch of PPP "Patent", g.

Fig 3

Circulation 678 Subscription

Uzhhorod, st. Project, 4

Claims (1)

A THREE-PHASE TRANSFORMER containing a base, a spatial magnetic core made of three twisted O-shaped elements, the conjugate rectilinear sections of which form the rods, and the non-conjugate ones are the yokes of the magnetic wire, the windings placed on the rods of the magnetic core, the lower ends of the windings on the outside being placed fixed on the supporting elements fastened to the base, the upper and lower clamps, tightened by a pin passing along the central axis of the magnetic circuit, while the upper clamp rests on the upper yokes and a magnetic circuit, characterized in that, in order to reduce energy losses by improving the electromagnetic characteristics of the magnetic circuit and reduce the complexity of manufacturing, the transformer is equipped with insulating spacers located between the upper yokes of the magnetic circuit and the upper ends of the windings, and the lower ends of the windings with an internal the sides rest on the second clamp. ® Figure 1