SU1494115A1 - Massive rotor of electric machine - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to high-speed turbo engines. The purpose of the invention is to increase reliability by reducing the heating of tooth heads from eddy currents. Insulated winding rods 1 with conductive cylindrical dies 2 are placed in the axial grooves of the massive barrel 3 of the rotor. The element 8 of a material with high electrical conductivity has a bend along the length, which gives it a Z-shaped form. The upper part of the element 8 is located in the slots of the heads of the teeth, and the lower part in the open grooves made in the shorting part of the comb back. 5 il.

Description

.one

314

The invention relates to electrical engineering, in particular to high CKopocTiibiM turbo engines having massive rotors

The purpose of the invention is to increase the reliability of reducing the heating of the heads of the teeth from eddy currents.

Figs 1 and 2 show the right side of the rotor and two projections; fig about 3 -. slit LL on; FIG. A, —cf a copraous tsch1indriches comb; Fig 5 is a section bB in Fig.4 about

Insulated rods of winding 1 together with conductive centers with shinning combs 2 are placed in axial grooves milled in a massive barrel 3 of the rotorS They are fastened with wedges 4 of a high-strength material. Between the rods and the comb, there are insulated gaskets 5 "For the end parts of the rotor barrel, the rotor teeth in the heads of the rotor are closely spaced; : Axial closed grooves, epic to their outer surface, 6 with slots 7c

The 8 kz element of a material with a good electrical conductivity, for example from; go, has a bend along its length (fGSZ), which gives it a Z-o6pa3Hyio shape. The upper part of the rod is inserted into ops; combs are open pizzas 9, in which the clamping parts of the element 8 are laid. A solid solder is used to create and ensure reliable electrical contact of the element with the comb. On the pin ;; astine comb, the bandage of Yuo is pulled over the butt end of the rotor barrel and the display is 11 dpi to hold the curved part of element 8, which is subjected to tweetting of detrobeste forces. The bandage se kolg.o his protrusion is extended to the edge of the rotor "

On frame 1G, 1 one element of a circular chain per rotor tooth is shown depending on the specific structural dimensions of the end part of the rotor, the amplitudes of the higher harmonics zero and its technological features from the heating square, the number of elements per tooth can be more than one, and the section of the element may differ

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About 5 5

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54

It can be round, for example, its upper part can be square, and the lower rectangular, in the form of a strip.

Elements of the Z-shaped form can also be located in the end part of the large tooth of the rotor barrel.

The device works as follows.

The harmonics of the magnetic field, created by the high-frequency components of the stator winding current, induce in the thin surface layer of the heads of the rotor teeth the corresponding eddy currents directed along the 1st axis of rotation of the rotor. However, the closure. These currents in its end part in the tangential direction prevent the slits 7, h GS SG, cause eddy currents to rush along the electroconductive elements 8 and further along the comb 2, where onc closes with currents from other elements. As a result, additional losses from high-frequency eddy currents in the end part of the rotor barrel are, like the heating from them, soup1; naturally snyukannymi compared with devices where the number of holes occurs on the steel of the rotor barrel and retaining rings o

Claims (1)

Invention Formula A massive rotor of an electric machine containing a barrel with radial teeth, a winding secured in its grooves by means of wedges, retaining rings and conductive cylindrical combs located under the wedges and retaining rings, characterized in that, in order to ensure reliability of the teeth by reducing the heating of the heads of the teeth from eddy currents, the rotor is equipped with Z-shaped elements made of electrically conductive material with an electrical conductivity higher than that of steel, and in the heads of the teeth of the end parts of the rotor barrel and located under The axial grooves are made with retaining rings of the combs, in which the upper and lower parts are located, respectively. Z-shaped elements. 8 FIG. g eleven ten ////////////, WA. dzie.Z (rigA Fig5