Optimum Design Method of AC Motor Branch Asymmetric Winding Arrangement and Branch Asymmetric Winding Arrangement Scheme

Abstract

The invention discloses an AC motor asymmetric branch winding arrangement optimization design method and an asymmetric branch winding arrangement scheme. The method of the invention combines the traditional asymmetric winding research method, a branch winding arrangement scheme serves as the minimal unit, fuzzy grouping processing is carried out on the branch winding arrangement scheme, search match is carried out on each branch winding arrangement scheme in a group, and finally, a winding arrangement scheme with small branch amplitude asymmetry degree and maximal phase difference is obtained. Minimization of the asymmetry degree of the asymmetric branch winding arrangement scheme can be realized, and thus, loop current between branches can be reduced, winding loss is reduced, and the motor operation efficiency and the stability are improved; and during the optimization process, a large amount of useless schemes can be filtered automatically, the winding design precision and the efficiency are greatly improved, and the practicality is strong.

Description

technical field [0001] The invention relates to the field of stator winding design of an AC motor, in particular to an optimal design method for an asymmetric winding arrangement of an AC motor branch and an arrangement scheme of an asymmetric winding arrangement of an AC motor branch designed by the method. Background technique [0002] The branch asymmetrical winding refers to the winding in which the windings of each phase are distributed symmetrically and the windings of each branch are distributed asymmetrically. The asymmetric design of the branch circuit for the stator winding of a large AC motor can effectively reduce the working current of the conductor in the slot, thereby effectively solving the prominent problems of large loss, temperature rise, and large electromagnetic force on the wire rod of the stator winding of a large-capacity AC motor. Thereby improving the efficiency and stability of the whole unit operation. [0003] The existing branch asymmetric wind...

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Problems solved by technology

[0003] The existing branch asymmetrical winding design often relies on the personal experience of the designer. This kind of method is very difficult to operate, and there is no unified rule to follow, so it is difficult to achieve the optimization of the winding arrangement scheme.

At the same time, the obtained arrangement scheme has a large degree of asymmetry in the branches, which leads to an increase in the circulation between the branches and an increase in the winding loss, which reduces the efficiency and stability of the motor operation.

In addition, the simple enumeration method is used to select the arrangement scheme. This method has a very large amount of calculation, and there are a large number of useless schemes, resulting in very low precision in the design of the entire winding, and cannot effectively select the branch amplitude asymmetry and maximum phase. Winding arrangement scheme with small difference

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