SU1125706A1 - Combined rotor winding for single-machining frequency changer - Google Patents

Abstract

COMBINED ROTOR COVER FOR SINGLE-MACHINE FREQUENCY CONVERTERS with the numbers of pairs of poles P, / Pg, three-phase for polarity P,}. short-circuited for polarity P, containing SP, distributed coil groups with group numbers in the first phase 1 + 3k, in the second phase 3 + 3k, in the third phase 5 + 1 3k connected in parallel branches, the beginnings of which form three-phase clamps for polarity P The ends are connected to a common zero point, characterized in that, in order to simplify the design and manufacture, as well as to improve the parameters, in each phase the beginnings of the odd groups are connected to the phase clamp, and the ends of the even groups to the zero point, and the ends odd and start even groups with dineny together and move coils is three times the pole pitch for j polyusnostiR, where p, / P "r 1/6, k 0,1,2, ..., (). Fy pz pt fe

Description

The invention relates to the field of windings of combined AC electric machines, for example, single-machine frequency and phase converters.

Combined AC machines are known, embodied in the form of parallel branches of one polarity P, each of which contains spatially shifted coils and has findings of midpoints that are the beginning of the phases of another polarity Pn. The angle between the axes of the same branch is .2lf (+ P,) ed, and the number of turns in the coils is proportional to the angle of shift of them relative to the axis of the turns lj.

The disadvantages of these windings are complexity of design and manufacture, large losses from equalizing currents in wind are 20 3 + x. The closest to the invention is the combined winding of the rotor of single-machine frequency converters, made with the numbers of pole pairs a whole number and containing 6 or 3 RL distributed coil groups, connected in P „parallel branches, the beginnings of which form three-phase clamps with a polarity Prt for the generator and are connected to contact rings, and the ends are connected to a common zero point and the contours of the branches form Rotary coil with pole P for asynchronous motor The disadvantages of the known winding are the large number of inter-ball joints (with the number of coils bR), which complicates the design and manufacture, increases the consumption of copper. In addition, in such a winding it is possible to execute Pg parallel branches, which limits its functionality. The purpose of the invention is to simplify the KOH structure and manufacture j as well as improve the parameters. This goal is achieved by the fact that in the combined rotor winding with the numbers of pole pairs, three-pole for polarity Pj and short-circuited for polarity P, containing 3 Pj distributed coil groups with group numbers in phases 1 + 31, 3 3k, 3 + 3k, connected in parallel-felny branches, the beginnings of which. form three-phase clamps for polarity Pg, and the ends are connected in common

the zero point, in each phase of the beginning of the odd, the groups are connected to the phase clamp, and the ends of the even groups are in the zero point, the ends of the odd and the beginning of the even groups are connected together, and the coil pitch is three times the pole division for the poltochnosti P, where P ,, ,, 2, .. ,, (PJ, - 1).

FIG. 1 is a diagram of the proposed winding j in FIG. 2 and 3 are diagrams of the emf of the phase for polarity Pj 1 and Pg 6.

The winding (Fig. 1) is made single-layer in 36 slots of 18 distributed coils (with numbers from 1 to 18 with a step along the slots of UE 9.

For polarity, Rd 6 is three phase with coil numbers, in phases 1 + 3k 1,4,7,10,13,16, 3k 3,6,9,12,15,18, 5 + 3k 5,8 , 11,14,17,2, where to 0,1,2 ... (). In each phase, the beginning of the odd coils are connected to the phase clamp (P1, P2, P3), and the ends of the even coils are connected to the zero point O, and the ends are odd. and the beginnings of even phase coils are connected together The arrows in FIG. 1 shows the direction of the currents when the winding is supplied through the terminals P1, P2, P3 with a three-phase current (Pj 3). Winding winding ratios: for polarity Р.1-К, 0.707, for% bk, 5 (, 1.0.: In Fig. 2 and 3, the phase EMF vectors are assigned to the coil numbers. Of Fig. 2, constructed for Phase P1 - O for the polarity of P 1, it is clear that this phase forms a short-circuited system equivalent to a six-phase winding. In Fig. 3, constructed for the polarity of P2 6, it is clear that the P1-0 phase has P „/ 2 3 parallel branches, midpoints which are connected together. Such a connection of equipotential points improves the winding parameters for polarity P: reduces the sensitivity of the winding to magnetic noise and vibrations of the machine with the proposed winding. Thus, the proposed winding has a simpler design compared to the known one. Because of the smaller lengths of the inter-joint connections, as well as better parameters for polarity P. It can be used on the rotor asynchronous and asynchronous-synchronous single-machine frequency converters and number of phases.

Claims (1)

COMBINED ROTOR WINDING FOR SINGLE-MACHINE FREQUENCY CONVERTERS with the numbers of pole pairs $ ₍ / Pg, three-phase for pole and short-circuited for pole P, containing Sp, distributed coil groups, groups with group numbers in the first phase, 1 + 3k + Зк, in the third phase 5 + 1 Зк, connected in parallel branches, the beginnings of which form three-phase clamps for the Pg pole, and the ends are connected to a common zero point, characterized in that, in order to simplify the design and manufacture, as well as improve parameters in each phase la of the odd groups are connected in the phase clamp, and the ends of the even groups are at the zero point, and the ends of the odd and the beginning of even groups are connected together, and the step of the coils is three times the pole division for the pole P ₂ , where P, / Pa = 1/6, k = 0,1,2, ..., (P _a -1). S_U _nu 1125706. 1 11