基于田口法的永磁发电机气隙磁通密度优化  

Optimization of Permanent Magnet Machine Air- Gap Flux Density Based on the Taguchi Method

作　　者：刘明基[1] 韩志[1] 裴亚伟[1] 张元星[1] 

机构地区：[1]华北电力大学,北京102206

出　　处：《微特电机》2014年第3期29-32,35,共5页Small & Special Electrical Machines

摘　　要：为了减小气隙磁场中谐波含量过高对永磁发电机性能造成的不利影响,结合Taguchi方法和时步有限元法对内置"V"型转子磁路结构的永磁电机进行优化设计。首先,以永磁电机的4个结构参数为优化变量,2种电机特性为约束条件,对采用非均匀气隙结构的永磁电机的转子结构进行多目标多变量优化,得到了最优空载下非均匀气隙磁通密度波形时的转子结构;然后通过对比优化前后的气隙磁通密度谐波含量,验证Taguchi方法优化结果的优越性和正确性;最后,运用时步有限元方法计算得到了考虑定子斜槽的电动势波形,进一步验证了该文气隙磁通密度优化的有效性。In order to reduce the disadvantageous effects of permnanent magnet machine performance caused by excessive harmonic content in air-gap magnetic field,optimal design of permanent magnet machine with built-in ＂V＂ type rotor magnetic circuit structure were taken based on the Taguchi method and time-stepping FEM in this paper.First of all,four structural parameters of permanent magnet machine were taken as optimization variables and two characteristics of machine as constraint conditions,and the multi-objective multivariate optimization of permanent magnet machine with non-uniform structure was adopted and the rotor structure of optimum no-load air gap flux density waveform was obtained.Then the advantage and accuracy of the optimized results with Taguchi method was verified by comparing the air gap flux density harmonic content before and after the optimization.Finally,the electromotive force waveform considering the stator chute was calculated with time-stepping FEM to verify the effectiveness of air-gap flux density optimization further.

关 键 词：永磁电机 非均匀气隙 Taguchi方法 磁极形状优化 时步有限元法 

分 类 号：TM351[电气工程—电机]