SU1251240A1 - Three-phase winding with switching pole numbers in the ratio 10:8 - Google Patents

Abstract

The invention relates to fully connected windings and is used to create multi-speed electric motors. The purpose of the invention is to improve the energy performance due to the harmonic composition of the magnetizing force and the reduction of the differential scattering coefficient. The winding is divided into six identical semi-phases with conclusions from the beginnings and ends of semi-phases, contains forty-two coil groups. The first half-phase of phase A includes the groups with numbers 1.3, -6, 12-16, -18, 21, the second half-phase of phase A - groups -22, -24; 27, -33, 37, 39, -42, the first half-phase of phase B - groups 15, 17, -20, 26, -30, -32, 35, the second half-phase of phase B - groups -36, -38, 41, - 5, 9, 11, -14, the first half-phase of phase C - groups 29, 31, -34, 40, -2, -4.7, the second half-phase of phase. C - groups -8, -10, 13, -19, 25, -28, a minus sign in front of the number means the group’s on-switching. Such a winding arrangement makes it possible to reduce the amplitude of the maximum harmonic. 2 3.p. f-ly, 3 silt, 1 tab. yu (L

Description

The invention relates to pole-switched windings and can be used to create multi-speed electric motors.

The purpose of the invention is to improve the energy performance by improving the harmonic composition of the magnetizing force and decreasing it. differential ratio coefficient.

Fig. I shows a diagram of the connection of coil groups in conjunction with phase matching to provide a minimal difference in the ratio of the magnetic induction BP (with the number of poles Р „4) to В Р„ 5)

pairs of poles Р 4) to (when the number of pairs of poles is Pj 5) are from one; in FIG. 2, the connection diagram of the coils corresponds to the connection of the coil groups in FIG. the number of katugak in each of the coil groups 1-42, starting from the first, correspond to the row (K, K, K, 2K, 5K 4K, K) ...-,.

The coil group is depicted with a figure corresponding to the Howepy coil group. To the left of the figure the beginning of the coil group is depicted, to the right the end (the end and the beginning of the coil group are marked with an asterisk). The conclusions are made from the beginning (FOR, 5В, 5С) and the end (4А, 4В, 4С) of the first semi-phases.

The findings in FIG. 2 correspond to the outputs in FIG. one .

At P 5, power is supplied to VY4C

Р, 5 waters 5А, 5В, 5С (conclusions 4А, 4В,

are free), and with RZ 4, the power is supplied to the highways 4A, 4B, 4C (conclusions 5A, 5B, 5C are shorted),

Other coil distributions are possible across coil groups 1-2.

The table shows the comparative data of the winding circuits shown in FIGS. 2 and 3 with the step of shortening the winding of 8 and the phase matching at which the ratio of magnetic inductions is closest to unity.

i

As follows from the data in the table, the TD index is 1.28 times less, and the TH is 1.34 - 1.42 times. Relative amplitude maximum

2

less

in 1.18-1.26

harmonics DA1y) X times.

Claims (3)

Formula of gain five 0 five 0 five 0 five 1 i Three-phase winding with switching numbers of poles in the ratio of South 8 with the number of slots Z К 90 (К 1,2,3 ...), divided into six equal semi-phases with leads from the beginnings and ends of semi-phases in which the change in the number of pairs of poles is reached changing the current direction in the first three or second half phases of each phase, distinguishing and so that, in order to improve energy performance by improving the harmonic composition of the magnetizing force and reducing the differential scattering coefficient, it contains forty-two coil groups, the number of coils in each of which, for example, starting with the first, do (i, ij i 3 --ij included according to, if the number of the coil group is positive, and counter, if the number of the coil group is negative, is six half-phases so that the first half-phase of the phase belongs to the coil groups with numbers 1,3, -6, 12 , -16, -18, 21, wto the phase A phase - phase coil - coil, groups -22, -24, 27, -33, 37, 39, -42, the first semi-phase of phase B - coil groups 15, 17, -20, 26, -30, -32, 35, to the second half-phase of phase B - the coil groups -36, -38, 41, -5, 9, P, -14, the first half-phase of the phase C - coil groups 29, 31, -34, 40, -2, -4, 7, the second phase C phase - coil groups -8, -10, 13, -19, 23, 25, -28, where ir (G 1-7) is a natural number and h 15 K, and the minus sign in front of the number of the coil group means its opposite turning on. 2. Winding according to Claim 1, characterized in that in the coil groups the number of coils corresponds to the row (K, K, K, 2K, 5K, 4K, K) .... 0 3. Winding device 1, characterized in that in the coil groups the number of coils correspond to the row (K, 2K, K, K, 5K, 4K, K) .... Slot numbers Ular shrink winding Phase wiring diagram Winding ratio TO four (R, ) Winding coefficient K. 05 (P 5) The coefficient of differential scattering TD4,% (P .4) Differential scatter coefficient TD5,% (PJ 5) TD TD4 + TD5,% The coefficient of differential scattering without taking into account the lower garm TH4,% (P 4) Differential scattering coefficient of low TH harmonics accounting,% ( TH TH4 + TH5,% Induction ratio AT one / at 05 Relative amplitude of maximum harmonic AMAH,%. The order of maximum harmonic PMAH 90 8 Aul5 four 0.8173 0.7476 2.55 3, -56 6.11 1, 20 3.44 4.64 0.845 1.6 90 eight 0.8334 0.7249 2.54 3.58 6.12 0.99 3.39 4.38 0,803 12,4 90 8 0.6641 0.9224 4.02 3.82 7.84 3.90 2.32 6.22 0.962 14.6 14 FIG. 2