SU399970A1 - THREE-PHASE DOUBLE-LAYERED INDIVIDUAL - Google Patents

Description

one

This invention relates to pole-selectable windings of AC motors.

The known three-phase two-layer pole-switching windings for the number of slots multiple of 48, with the ratio of the number of pole pairs / 1 / Р2 / РЗ 4/3/2, are characterized by a technologically inconvenient distribution of coils by grooves or a large number of terminals.

The purpose of the invention is to simplify the design.

This is achieved in that the winding is divided into PO - equal parts, coil 4

each of which are located in z / Po grooves

z (d - l) ha with numbers from 1+ - to- inclusive XORO

but, with the number of pairs of poles p, the coil groups are included in each phase, the numbers for which bypassing the stator are determined by the formula L (2t-1) + 3 /.

Each coil group consisting of 2 / (coils occupies grooves with numbers from 2K (N-1) + 1 to 2K.N, while adjacent coil groups of each phase are turned on counter, and when switching the winding on the number of pairs of poles and rz in each of the RO sections, the winding of each phase is divided into groups according to the included coils, and the numbers of the slots in which each coil lies

2

groups of this phase are in the range defined for p2 for the first and second phases of the formula -

1 + IQKi + Kt 5X 1 + IQKi + e / C (+ 1). for the third phase - 1 + 15 / С + 8 / С 53 1 + 5К +% K (t + 1),

at rz -

1 + 4 / С (7-20 + 12/5

C-4 / S (7-20 + 12 / G (/ + 1),

moreover, the adjacent groups of phase coils are turned on, with: PI. p2 RZ - NUMBER of winding pole pairs; i is the phase number, Z is the number of slots (the number of winding coils); d is the sequence number of each of the ROs

parts, K is a positive integer.

,

/WITH

48R

t - number of coil group in phase

O / 2p-1;

S is the number of the groove in which the coil of the group of the i-th phase is located.

The drawing shows the proposed winding for, 2RZ 4.

The winding has twelve conclusions when mating phases

DDL / LAACH

and fifteen when mating phases

l / l l / l

and contains 48 coils located in slots 1-48. When switching, the direction of current is changed in part of the phase coils. Switching coils from phase to phase does not occur.

Subject invention

Three-phase two-layer pole-switched winding of a three-speed motor with 48 coiled coils, with a ratio of pole pair numbers pi / p2 // 3 4/3/2, characterized in that, in order to simplify the design, the winding is composed of PO of identical sections with the number of coils z / Po in each, and within one section there are 26 reel groups, the numbers of coils in each of which, starting from the first, correspond to the row - 2L :, 2K, 2K, 2K, 2K, 2K, 2K, K, K, 2K, 2K, 2K. 2K. 2K, 2K, 2K. 2K, 2K, 2K, 2K, K, K, 2K, 2K, 2K, 2K, with the coil phase groups on each of the Ro sections

Divided into four parts, each of which includes coil groups having the following sequence numbers in the above range: I phase, the first part - 14, 11; the second part - 20, 17; third part - 7, 4;

the fourth part - 1, 24; Phase II, first part - 10, 19; the second part is 16, 13; the third part - 3, 26; the fourth part - 23, 6; Phase III, first part - 18, 15; the second part - 12, 8, 22; the third part - 25, 21, 9;

the fourth part - 5, 2; in each of the four parts of the phase, the neighboring coil groups are included in the opposite direction, except according to the included coil groups 8 and 22, 9 and 21, and the parts of the same PO of the same name are interconnected, where:

PI, p2, pg - the number of pairs of winding poles;

I-- - - - the number of identical sections 4 3 2

winding forks;

2 - the number of winding coils; K. - positive integer number 1 / С

lo / C

48I „

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