SU1136257A1 - Rotor for bipolar asynchronized turbine-driven generator - Google Patents

Abstract

ROTOR OF TWO-STRIP ASINCHRONIZES OF HIS TURBO GENERATOR, containing two-phase winding consisting of coil groups, solitary. from concentric coils, spaced in the grooves of the magnetic core, characterized in that, in order to achieve a loss, the coils of one side of each coil group are at least one of the phases shifted within the pole division in one direction relative to the other side, forming solid wireless sections along circumference of the rotor magnetic circuit. t with

Description

This invention relates to an electric drive, in particular to a turbo jet,

Asynchronized turbo-generators have a multi-phase, mainly but two-phase, winding on the rotor, designed to increase the stability of the madoga operation in the power system in transient conditions due to the separate current control in the Yu phase.

The rotors are known with a two-phase two-layer winding consisting of concentric coils laid in the lower and upper layers of the heading i,

Odaako rotor with the specified winding has increased losses with respect to the low winding coefficient, not exceeding the winding coefficient of the loop winding with shortening of the pitch / i 0.5.

The rotor of a two to 25 pole asynchronous turbo generator containing a two phase winding consisting of coil groups made of concentric coils 30 located in the slots of the magnetic circuit 2j is closest to the invention in its technical essence and the effect achieved.

The disadvantage of the known rotor is the rather high losses due to the unfavorable triangular shape of the resulting magnetic motive force (VL) curve, which contains an increased composition of higher harmonics in the synchronous mode of operation of the machine, which is a prolonged mode of operation, which leads to 40 more losses in the rotor ,

The purpose of the invention is to reduce losses in the car,

This goal is achieved by the fact that 45 in the rotor of a bipolar asynchronized turbo generator containing a two-phase winding consisting of coil groups made of concentric coils placed 50 in the slots of the magnetic core, coils of one side of the coil group are at least one of the phases shifted in the limits of the band division in one direction relative to the other cost are 55 RONES, forming solid wireless sections along the circumference of the rotor magnetic conductor.

Fig. 1 shows the arrangement of the conductors with a current on the rotor magnetic conductor; figure 2 - diagram of the winding of the rotor; FIG. 3 shows a curve of the resultant MDS of the rotor on one pole; FIG. 4 shows the end part of the proposed rotor, a longitudinal section.

The rotor of a bipolar asynchronized turbogenerator contains a winding of two phases 1 and 2, having the beginnings H and H2 and the ends K1 and K2. Each phase consists of groups of 3-3, 4-A and 5-5, bb concentric coils placed in the slots of the magnetic core 7 of the rotor. One of the sides 3 and 4 of each coil group of at least one of the phases 1 is displaced in the same tapgenic direction (for example, clockwise) from its other side 3 and 4, respectively. Between the shifted sides .3 and 4 of the coil groups of one phase 1 and the sides 5 and the coil groups of the other phase 2, the cord-shaped ribs 8 and 9 (shown in angular dimensions) are formed on the rotor circumference. The same shift of the sides 5 and 6 of the coil groups of the second phase 2. can be performed in the opposite direction (counterclockwise) to the shift of the first phase, in order to increase the non-conductive sections 8 and 9. The width of these sections is not less than 1/3 pole division Oh, the rotor.

The sides of all coil groups after the shift can be distributed in the grooves of the magnetic circuit with a uniform, measuring step. In addition, between the sides of Zi4; 4iz; 5ib; 6 and 5 coil groups in each phase additional wireless sections 10–13 can be made on a 1-1.5-pitch rotor grooved, used to place bapant weights on the magnetic core and to arrange a place to locate the current leads (leads from the terminals) of the phases and supply refrigerant to the frontal parts of the rotor windings that have direct cooling of the conductors.

The curve of the resulting winding is constructed using single vertical segments from the currents in the conductors, which in synchronous mode have the same magnitude in the phases. Opposite directions of currents in the conductors are marked “(plus) and (point). The vertical segments are located opposite their groove divisions and are connected horizontally and by segments, forming the stepped curve of the ES within the pole division C, is the base of it. (step curve is shown by thin lines). Sloping lines depicting average values of ((C, replacing values crawling along a stepped curve. The presence of cordless sections 8 and 9 on the rotor forms an upper horizontal segment on the curve, the length of which is in fractions of seconds, the width of sections 8 and 9 The presence of the wireless sections 10-13 of the rotor forms on the ESP curve on the lateral horizontal segments, the length of which corresponds to the width of the sections 10-13 of the rotor. As a result, the ESP curve instead of the triangular one acquires a simplified form with two horizontal protrusions in the middle the height of the part extending to its base to the base. The vertical axis of symmetry d of the S curve corresponds to the longitudinal axis d on the rotor. The device works as follows. When the winding phases are fed, the rotor sections 8 and 9 reduce the presence of the rotor in the curve SCHS composition of higher harmonic, primarily the third ninth, etc., which improves the shape of the magnetic field in the gap of the machine, bringing it closer to the sinusoidal and at the same time enhances the ground harmonic, i.e. It winds the winding rate of the winding by expanding the coils in groups due to the displacement of one of the sides. The presence of four other wireless sections 10–13 practically does not change either the degree of approximation of the thyroid curve to the sinusoidal form, nor its first i armonic form, it does not provide constructive advantages. One of the options for securing the frontal winding parts of the proposed rotor (4 ″ g. 4) provides for the frontal parts of two winding layers, the arcs of which are displaced in the axial direction by half of the I step of their b, and the support of the lower layer through the intermediate composite insulation cylinder-14 and spacers 15 on the inner surface of the back-ring of the ring 16. Due to this, the upper layer of the winding frontal parts is free from loading with the lower layer, which frees it, from additional mechanical compressive stresses. Thus, the winding of the rotor, in which one of the coil sides of the coil coil at least one of the phases is displaced in one direction relative to the other side, forms coils of one phase and coil groups of another phase of the wireless sections around the circumference. - rotor line, allows to reduce the magnitude of the rotor current and the loss due to this by reducing the magnetic resistance of the magnetic circuit on the cordless sections, increasing the winding of the winding coefficient and improvement of the shape of the curve of its EF. In addition, the improved shape of the ESP curve allows to reduce losses in the stator core of the turbo-generator.

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Claims (1)

ROTOR OF A TWO-POLE ASYNCHRONIZED TURBOGENERATOR, comprising a two-phase winding consisting of coil groups made of concentric coils placed in grooves of the magnetic circuit, characterized in that, in order to reduce losses, the coils of one of the sides of each coil group of at least one of the phases are shifted within pole fission in one direction relative to the other side, forming continuous cordless sections around the circumference of the magnet-rotor wire. 1 1136257 1