Motors with electromagnetic reduction of rotation frequency with switched magnetization

Proceedings of the Russian higher school Academy of sciences Pub Date : 2021-12-27 DOI:10.17212/1727-2769-2021-4-49-61

A. Shevchenko, Tatiana V. Chestyunina, D. Toporkov, G. B. Vyaltsev

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Abstract

The paper presents design features of motors with electromagnetic reduction of rotation frequency with switched magnetization. The harmonic composition of the magnetic field of such motors is considered when using fractional slot windings. Analytical expressions for the magnetomotive force of the winding are given and data on operating harmonics for reluctance motors and motors with switched magnetization at different numbers of phases are presented. The principle of operation of such machines is described. The method of harmonic permeances was used to calculate the magnetic field in the air gap. As a result, analytical expressions were obtained for the distribution of the magnetic field in the air gap and the electromagnetic torque. After analy¬zing the expressions obtained, the paper presents the conditions under which the formation of an electromagnetic torque occurs. The design and the operation principle of motors with electromagnetic reduction of rotation frequency with switched magnetization is described and compared visually with reluctance motors. It illustrates a better use of the active volume in machines with switched magnetization. In addition, a comparison between motors with switched magnetization and classical electric machines (synchronous, induction and direct current machines) in terms of the utilization of an active volume factor for different power values is given.

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电磁降低旋转频率的开关磁化电机

介绍了开关磁化电磁降频电动机的设计特点。当采用分形槽绕组时，考虑了这类电机磁场的谐波组成。给出了绕组磁动势的解析表达式，并给出了磁阻电机和开关磁化电机在不同相数下的运行谐波数据。介绍了这种机器的工作原理。采用谐波磁导率法计算气隙内的磁场。得到了气隙磁场分布和电磁转矩的解析表达式。通过对所得表达式的分析，给出了产生电磁转矩的条件。介绍了开关磁化电磁降频电机的设计和工作原理，并与磁阻电机进行了直观的比较。它说明了在具有开关磁化的机器中更好地利用有源体积。此外，还比较了开关磁化电机与经典电机(同步电机、感应电机和直流电机)在不同功率值下对有源体积因数的利用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the Russian higher school Academy of sciences

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