SU1476568A1 - Three-phase-single-phase combined electric machine winding - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to simplify the design and manufacture by reducing the number of coils in the coil group, as well as improving the parameters by increasing the winding coefficients for each pole. The winding is made with pole position P ₁ / P ₂ = 1/3 in 36 _P1 slots of 6 _P1 uniformly distributed coil groups / KG / with concentric coils and connected into two parallel three-phase stars with three-phase clamps for polarity P ₁ and additional single-phase clamps for polarity P ₂ from the zero points of the stars. The coils of each CG are divided into three subgroups, connected in series in each phase by the first subgroups to the branch of one star, the third subgroups to the branch of the other star, and the second subgroups to the additional branch, the beginning of which forms a phase clamp for polarity P ₁ and its end is connected to the beginning branches of star phase. Each CG is formed of five coils coaxial with the steps along the grooves have _n = 17,15,13,9,7. Two-layer coils with Y _n = 17 and 15 are connected in series and form the first subgroup, with Y _n = 9 and 7 form the third subgroup, and a single-layer coil with Y _n = 13 forms the second subgroup. 4 ill., 1 tab.

Description

 17 and 15 form the first subgroup, with Y „9, 7 - the third subgroup, and the single-layer coil with Y p 13 forms the second subgroup. The axes of the coil groups are shifted by angles (in electrical degrees) of 60 ° 180 °

p / | 1 and 60.3

for poles for poles

p 3. The winding is connected in two parallel three-phase stars with three-phase clamps C, C2, Sz for a pole of p1 10 with additional single-phase clamps 01-02 for polarity of r r 3 from the zero points of the stars. The first phase (C1) contains the coil groups with numbers 1 and 4, the second phase (C2) with numbers 3 and 6, the third phase (C3) with numbers 5 and 2. The first subgroups of the coil groups of each phase are connected in series to the branch one star, the third subgroups in the branch of another star, and the second subgroups in one (a „1)

an additional branch, the beginning of which forms the phase clamp, and the end (point 0 for phase C1 in Fig. 2). connected to the beginnings of the star branches of the phase, and the subgroups of even coil groups are included opposite to the subgroups of the odd coil groups. The second subgroups can be included in the phases in two (a - 2) parallel additional branches (Fig. 3).

FIG. 2-4 EMF vectors of the second subgroups are assigned the numbers of coil groups of the C1 phase, and the EMF vectors of the first and third subgroups are assigned the same numbers with one and two strokes. EMF coils are proportional to their coefficients.

shorten K y, sin and K Y3 - sin (ftYn / 2 / i i), where

№ / 2

 36/2 1R and division for p

 - pole 1 and p 1 - 3.

EMF of individual parts of the phase winding

FIG. 1, the upper row of arrows shows the direction of the currents when powering the winding through C1, C2, N3 is three-phase: for polarity of rc 1 (Fig. 2), 55 nym (rg 1), and the lower row - EMF of an additional (a 1) branch when powered windings through 01-02 CI-O -Ecf-o. 2 0,063-2-with WK single-phase current (pg 3). 3.6252 w; The EMF of the branches is 0-01 and Thus, we offer both 0-002-Eo-oi 2 (0.9962 + 0.9659), the coil is electromagnetically independent5

0

five

(l-x) wji "3.9242 (1-x) w and} - (0.707HO, 5736) (1 + x) wn 2.5614 x (l + x) wK; EMF of phase С 1-Е с +

 + 0.5 (EO -DI + Eo -oi) winding coefficient KO61 EЈ4 / 4 (c + l) for pole position PIJ 3 of phase C1 (figure 4) EMF between terminals 01-02 4 (0.9659 + 0.7071 ) wK „

0 6,692 winding coefficient K0еa - К0.0, / 8 WK 6,692 / 8 0,8365.

From the condition of equality of the EMF of the branches and O-02 for the polarity p 1 (Ef-02) we find x 0.21 WK and (1-x) w, (1 + x) WK 0.79 1.21 WK is the ratio of the numbers of turns of the double-layer coils of the first and third subgroups, and the grooves in which the sides of these coils are located, have 2 w turns (Fig. 1). If we take the coefficient c 1.0, we get Et1 3,6252 x x with WK + 0.5 (3,, 79 + 2.5614 x x 1.21) w (3.6252-s + 3.10) WK 6.7252 w to and K 0 ,, 6.7252 / 8 0.8407. Then, for example, for an EMF of the EU, V5 ECJ we get (3.6252.c + + 3.10) WK, 7252.wK, from where we find with 2.36 and Kofi1 | 3 x 6 7252/4 (2.36 + 0 0.8667, i.e., in this case, the coil of the second subgroup will have 2c w 4.72 w turns with a wire cross section 2.36 times smaller than the wire cross section of the remaining coils. Thus, with s 1.0, the winding can be used, for example , for a three-phase voltage of 230 (220) V, and with с 2.36 - for a voltage of 400 (380) V while maintaining for both cases unchanged the meters of the circuit Ot-02 for polarity p 3 (6,692 WK and K063 0.8365 ). All the winding slots have the same copper fill factor, and the coefficient C can also have other meanings. Similarly, the C coefficient is determined and when the second subgroup of phases is connected into two (a a 2) parallel additional branches (Fig. 3).

FIG. 1, the upper row of arrows shows the direction of the currents when the winding is fed through C1, C2, N3 three-phase 0

five

five

0

5 nym current (wg 1), and the lower p d - when the winding is powered through 01-02 by single-phase current (pg 3). Thus, the proposed coil has electromagnetically independent opposite-pole clamps: the field with PJ 1 does not induce an emf at clamps 01-02 (Fig. 2 and 3), and the field with p. Does not induce an emf at linear clamps C1, C2 , NW (Fig. 4). Compared to the prototype winding, for which K0 (and about 0.795 and K065 0.746, the proposed winding has fewer coils in the coil group and improved parameters, since its winding coefficients are higher at 0.8365 / 0.746 1.121 for pft 3 and 0.8407 / 0.795 1.057 times for pf

(At C 1.0 and poison 1).

Claims (1)

Invention Formula Three-phase-single-phase combined electric winding with pole PJ / PQ 1/3, for example, for the synchronous machine core with excitation system from the third harmonic field, made in 36 p ,, slots of 6p., Uniformly distributed coil groups with concentric coils and connected in two parallel three-phase stars with three-phase clamps for the polarity of p1 and with additional single-phase clamps for the polarity of p from the zero points of the stars, the coils of each coil group are divided into three subgroups included 476568-6 successively in each phase the first subgroups into the branch of one star, the third subgroups into the branch of another star, and the second subgroups into the additional branch, the beginning of which forms a phase clamp for polarity p, the end is connected to the beginnings of the branches of the stars of the phase 1 + 3k in the first phase, 3 + 3k in the second phase, 5 + 3k in the third phase and the opposite inclusion of the subgroups of even coil groups relative to the subgroups of odd tubular groups, which, in order to simplify the design and manufacture by reducing coils in the coil group, as well as an increase in the charge factors for each polarity, each coil group contains five coaxial coils with steps along the grooves Y, 17, 15, 13, 9, 7, bilayer sequentially 15 Y - 1 H The coils connected with Ґ, 17 form the first subgroup, with 9 and 7 form the third subgroup, and the coil with Yf, 13 is made single-layer and form the second subgroup, with the numbers of turns of the coils of the first, second and third subgroups being 0.79: 2, 0: 1.21, where O, 1, 2 ... ... (2p1). Phia.1 #