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Method-Specific Significance of Field Components in Three Methods of Torque Estimation

机译:三种扭矩估计方法中场成分的方法特异性意义

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摘要

Magnetic field distribution in the airgap of rotating machines, consisting of tangential and normal components, determines the instantaneous value of torque. Lorentz force (LF), Maxwell stress tensor (MST), and virtual work (VW) methods are commonly used to estimate its value. In their well-known forms, as used by design engineers of rotating machines, these three methods reflect distinct significance for field components. The LF method does not require the distribution of tangential field components to compute torque, whereas in MST and VW, it is required. In this article, torque expression-based equivalence of LF, MST, and VW methods is presented, starting from a simple two-coil conceptual system. Using this equivalence as a basis, certain indicative factors are derived, which provide insights on the typical significance of the tangential component in average and ripple torque. The analysis presented here helps designers obtain a better overview of the method-specific significance of field components and flux paths in instantaneous torque, from a numerical perspective.
机译:磁场分布在旋转机器的气隙中,由切向和正常部件组成,决定了扭矩的瞬时值。洛伦兹力(LF),麦克斯韦压力张量(MST)和虚拟工作(VW)方法通常用于估计其价值。在其众所周知的形式中,如旋转机器的设计工程师所使用的,这三种方法反映了现场部件的明显意义。 LF方法不需要分布切向场分量以计算扭矩,而在MST和VW中,是必需的。在本文中,从简单的双线圈概念系统开始,提出了基于扭矩表达式的LF,MST和VW方法的等价性。使用该等价作为基础,推导出某些指示因子,其提供了对平均和波纹扭矩平均和波纹扭矩的切向组分的典型意义的见解。这里提出的分析有助于设计人员从数值角度来看,设计人员在瞬时扭矩中更好地概述现场分量和磁通路径的特定于瞬时扭矩的显着性。

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