A method for transposition of stator bar of permanent magnet synchronous motor with forming transposition winding

Abstract

The invention discloses a transposition method for a stator bar of a permanent magnet synchronous motor with formed transposition windings, and relates to the technical field of permanent magnet synchronous motor design and manufacture. The present invention aims to solve the problem that after the traditional intra-turn transposition is applied to a permanent magnet synchronous motor with more coil turns per slot, the transposition of each coil turns requires more space for transposition. The space occupied in the slot is reduced, which in turn causes the problem of a decrease in the full rate of the motor slot and a decrease in the circulation suppression effect. A method for transpositioning stator bars of a permanent magnet synchronous motor with formed transposition windings according to the present invention, the permanent magnet synchronous motor includes 1 or 2 layers of windings, each layer of windings includes N turns of coils, and all the strands in the N turns of coils are It is divided into K groups, and the strands in each group are arranged in 2 rows. The strands are all flat wire structures, and all the strands in each group are transposed by interlacing and transposition between turns. The present invention is not only suitable for horizontal transposition, but also for Roebel bar transposition.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor design and manufacture. Background technique [0002] As permanent magnet synchronous motors are more and more widely used in the field of new energy vehicles, further improving the efficiency and operating performance of motors has become the focus of permanent magnet synchronous motor research and development at this stage. Since the flat wire structure winding can improve the motor slot full rate, the hairpin winding with the flat wire structure is more and more applied to the permanent magnet synchronous motor for vehicle drive. However, there are certain problems in flat wire motors at this stage. For example, the additional current in the motor winding includes two types of eddy current and circulating current. After the wire diameter increases, both currents will increase. The flat wire structure can suppress the eddy current but cannot suppress the circulating cu...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that after the traditional intra-turn transposition is applied to a permanent magnet synchronous motor with more coil turns per slot, the transposition of each coil turns requires more space for transposition. Occupying the space in the slot is reduced, which in turn causes the problem of the decrease of the motor slot full rate and the decrease of the circulation suppression effect. Now a method for transposition of the stator bar of the permanent magnet synchronous motor with formed transposition winding is provided.

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