Stator assembly with equalizing winding and motor

Abstract

The invention relates to the field of motors, in particular to a stator assembly with equalizing windings and a motor. Six layers of rectangular conductors are arranged in each stator slot; the connection path of the stator winding at the hairpin end is that the first conductor is connected with the first conductor in the other stator groove, and a combined span mode is adopted. The second conductor is connected with the third conductor in the other stator groove, and only the whole span mode is adopted. The fourth conductor is connected with the fifth conductor in the other stator groove, and a span mode of combined span is adopted; and the conductor 6 is connected with the conductor 6 in the other stator groove, and only an integral span mode is adopted. In the invention, the number of elements of each branch of each phase winding is the same, the number of phase slots and the number of layers through which each branch passes are the same, the same counter potential phase and the same size of each branch are basically realized, the same resistance and inductance at the head end and the tail end of each branch are realized, and the balanced arrangement of the three-phase winding is realized.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a stator assembly with balanced windings and a motor. Background technique [0002] The flat wire motor has the advantages of high power density and low electromagnetic noise. However, as the working speed of the motor is getting higher and higher, the AC loss problem of the flat wire motor under high frequency current operation has attracted more and more attention in the industry. [0003] The three-phase flat wire motor winding is generally composed of multiple parallel branches. When the layers or phases of the rectangular conductors of the flat wire passing through the windings of each branch are different, there will be obvious phase difference or uneven inductance between the branches. This leads to a circulation problem in each branch. The circulating current problem of each branch of the winding is the most prominent problem of the large AC loss of the flat wire motor ...

AI Technical Summary

Problems solved by technology

[0002] Flat wire motors have the advantages of high power density and low electromagnetic noise. However, as the motor operating speed increases, the AC loss of flat wire motors under high-frequency current operation has attracted more and more attention from the industry.

[0003] Three-phase flat wire motor windings are generally composed of multiple parallel branches. When the layers or phases of the flat rectangular conductors passed by the windings of each branch are different, there will be obvious phase difference or uneven inductance between the branches. Cause circulation problems in each branch

The circulation problem of each branch of the winding is the most prominent problem of the large AC loss of the flat wire motor at present

In addition, new energy vehicle drive motors generally adopt an 8-pole design. When the number of parallel branches of the motor winding is equal to 3, there has been no good solution in the industry to ensure the balanced arrangement of the branches of the three-phase winding.

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