Abstract

A physical and mathematical model is given, along with a computational and analytical description of physical processes in the electric motor and their relationship with the design of its equivalent electromagnetic circuit. The sources are determined and the relationships are investigated when the electromagnetic torque ripples occur. The analytical dependences of the ripples are obtained taking into account the nature of the air gap magnetic conductivity and the currents in the phase windings. It has been determined that the sources of these ripples are the higher harmonics of the air gap magnetic conduction function. The ripples contain three components: ripples of the main, additional and residual torques. It was determined that the amplitudes and phases of the ripple components of the main and additional electromagnetic torques are related to the lead angle of the windings current vector relative to the magnetic flux vector passing through the stator poles of the electric motor. The results were confirmed by numerical simulation of the electric motor electromagnetic system by the finite element method in ANSYS Maxwell. These results can be used to improve the designs of this type of electric motor, as well as in the development of circuit solutions and control algorithms for precision gearless electric drives of automatic control systems.

中文翻译：

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具有永磁体的单极无刷转矩电动机中的电磁转矩及其波动

摘要

给出了物理和数学模型，并对电动机中的物理过程及其与等效电磁电路的设计之间的关系进行了计算和分析描述。当发生电磁转矩波动时，确定源并研究它们之间的关系。考虑到气隙磁导率的性质和相绕组中的电流，可以获得纹波的解析相关性。已经确定，这些波纹的来源是气隙磁导函数的高次谐波。纹波包含三个分量：主转矩，附加转矩和残余转矩的纹波。已确定，主电磁转矩和附加电磁转矩的纹波分量的幅度和相位与绕组电流矢量相对于通过电动机定子极的磁通矢量的超前角有关。在ANSYS Maxwell中通过有限元方法对电动机电磁系统进行了数值模拟，结果得到了证实。这些结果可用于改进此类电动机的设计，以及用于自动控制系统的精密无齿轮电驱动器的电路解决方案和控制算法的开发。在ANSYS Maxwell中通过有限元方法对电动机电磁系统进行了数值模拟，结果得到了证实。这些结果可用于改进此类电动机的设计，以及用于自动控制系统的精密无齿轮电驱动器的电路解决方案和控制算法的开发。在ANSYS Maxwell中通过有限元方法对电动机电磁系统进行了数值模拟，结果得到了证实。这些结果可用于改进此类电动机的设计，以及用于自动控制系统的精密无齿轮电驱动器的电路解决方案和控制算法的开发。