SU1501216A1 - Three-phase switchable-pole winding - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is to increase the use of active materials by increasing the winding factors. The proposed winding implements obtaining pole numbers 2p ₁ : 2p ₂ = 16: 2 and is used to manufacture two-speed asynchronous motors with slot numbers multiple of 36. The winding contains 18 coil groups, with a certain correspondence between the coil group numbers and the grooves in which these coil groups are laid , as well as with a certain distribution of coil groups in winding semi-phases. Each phase is divided into semi-phases. Conclusions are made from the beginning and end of the phases and the points of connection of the semi-phases. 1 il.

Description

The invention relates to pole-switched windings of alternating current electrical machines and can be used in electrical engineering for the manufacture and installation of stator windings of two-speed asynchronous motors.

The purpose of the invention is to increase the use of active materials by increasing the winding factors.

The drawing shows the unfolded winding circuit, made in 36 slots of the stator with numbers from 1 to 36.

The coil includes 18 coil groups with serial numbers 1g 18g. Coils with a total number of turns W are shown as thick solid lines, and coils with a number of turns Wji are shown as thin solid lines. Filling all the grooves is the same. The winding contains nine terminals 16С1, 16С2, 16СЗ, 2С1, 2С2, 2СЗ, С1, -С2, СЗ, which provides switching according to the / &

When the clips 16С1, 16С2, 16СЗ are connected to the symmetric power supply network and the clips C1, C2, СЗ are closed, a rotating magnetic field with the number of poles occurs in the motor. With 2S1, 2C2, 2SZ clips connected to a symmetrical mains supply and closed in three groups

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terminals 16С1-С1-2С2, 16С2-С2-2СЗ, 16СЗ-СЗ-2С1, a rotating magnetic field with the number of poles arises in the engine.

The winding ratios of the proposed winding are: Kw-, 0.888; , 857,, 872.

In a constructive respect, the winding is single-double-layered, it is sooit from 18 concentric coil groups and can be laid on the modern stator wound. equipment, since its design satisfies all the requirements imposed on windings for mechanized installation.

This winding is superior to that known for the use of active materials and can be recommended for use in the electrical industry in the manufacture and installation of the stator windings of two-speed asynchronous motors with slot numbers multiple of 36.

Claims (1)

Invention Formula Three-phase pole-switched winding with a ratio of the numbers of poles 2p: 2p. 16: 2, containing coils unevenly distributed among the coil groups connected in series, forming a phase, divided into two semi-phases, provided with leads from the beginning and ends of the phases and connecting points of the semi-phases, characterized in that, in order to increase the use of active materials by increasing the winding coefficients, the winding is made of 18 coil groups with serial numbers from 1g to 18g, of which six coil groups with serial numbers 1g, 4g, 7g, South, 13g, 16g and the beginning of the coils in the slots with numbers 1, 7, 13, 19, 25 31 respectively are formed by coils with the number of turns We and pitch, six coil groups with order numbers Zg, 6g, 9g, 12g, 15g and 18g and the beginnings of external coils in the slots numbered 2, 8, 14, 20, 26, 32, respectively, are formed by concentric coil groups consisting of one coil with the number of turns Wft, in increments of 17 and one coil with the number of turns W in increments, six coil groups with serial numbers 2g, 5g, 8g, 11g, 14g, 17g and in the grooves with numbers 5, 11, 17, 23, 29, 36, respectively, are formed by coils with a number of turns W and a pitch, and in the first half-phase of the first phase with clips 16C1-2C1 coil groups with order numbers 6g, 14g, 7g are included , the second half phase of the first phase with clips 2C1-C1 includes 15g, 5g, 16g, the first half-phase of the second phase with clips 16C2-2C2 includes 18g, 8g, 1g, the second half-phase of the second phase with clips 2C2-C2 includes 9g, 17g, South, in the first half-phase of the third phase with clips 16СЗ-2С included 12g, 2g, 13g, in the second half-phase of the third phase with clips 2СЗ-СЗ on The prices are 3g, 4g, 2g, while the coil groups with the order numbers 1g, 3g, 4g, 6g, 7g, 9g, South, 12g, 13g, 15g, 16g, 18g are included in opposite to the other coil groups within the semi-phases and the relative number of turns of the coils are in respect of WrWjL 1.0: 0.5.