Comparison of Analytical Models of Cogging Torque in Surface-Mounted PM Machines
Comparison of Analytical Models of Cogging Torque in Surface-Mounted PM Machines
复制标题
DOI：
10.1109/tie.2011.2143379
复制
发表时间：
2012-06
影响因子：
7.7
通讯作者：
L. Wu;Z. Zhu;D. Staton;Mircea Popescu;D. Hawkins
中科院分区：
文献类型：
--
作者：
L. Wu;Z. Zhu;D. Staton;Mircea Popescu;D. Hawkins
本文比较了四种预测表面安装永磁电机齿槽转矩的分析模型，即，横向力（LF）、复磁导（CP）和精确子域（SD）模型，以及基于单个槽/极的SD模型。该模型进行评估的气隙磁通密度，齿槽转矩，反电动势（EMF），电磁转矩，饱和效应，和计算的复杂性，特别侧重于设计参数的影响，如槽深槽开口比和最佳极弧极距和槽开口槽间距比，齿槽转矩。结果表明，所研究的解析模型对基波反电动势和平均转矩都具有类似的高精度。然而，他们的预测是完全不同的反电动势，齿槽转矩和电磁转矩波形的纹波。总体而言，SD模型具有较高的准确性，而精确SD模型是最准确的研究模型之间的插槽之间的相互影响，虽然具有较高的计算复杂度。SD模型的计算比LF模型的计算慢，但可以比CP模型的计算快。有限元和实验结果验证了比较。
This paper compares four analytical models for predicting the cogging torque in surface-mounted permanent-magnet machines, viz., lateral force (LF), complex permeance (CP), and exact subdomain (SD) models, together with an SD model based on a single slot/pole. The models are evaluated for the air-gap flux density, cogging torque, back electromotive force (EMF), electromagnetic torque, saturation effect, and computational complexity, with particular focus on the influence of design parameters, such as the slot-depth-to-slot-opening ratio and the optimal pole-arc-to-pole-pitch and slot-opening-to-slot-pitch ratios, on the cogging torque. It shows that all studied analytical models have similar high accuracy for the fundamental back EMF and average torque. However, their predictions are quite different for the ripples in the back EMF, cogging torque, and electromagnetic torque waveforms. Overall, the SD models have high accuracy, while the exact SD model is the most accurate among the studied models by accounting for mutual influence between slots, albeit with high computational complexity. The computation of the SD models is slower than that of the LF model but can be quicker than that of the CP model. The comparison is validated by the finite-element and experimental results.