Performance calculation and improved model research of direct-drive permanent magnet generator based on FEM  

作　　者：ZHANG Jian LI HeMing LUO YingLi DOU Na CUI XueShen 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China

出　　处：《Science China(Technological Sciences)》2012年第8期2338-2345,共8页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 50977028,51077048)

摘　　要：In some control strategies of the direct-rive permanent magnet generator(DDPMG),the mathematics model is excessively simplified and some complex nonlinear characteristics,such as core saturation and cross-saturation,are generally neglected.To solve this problem,this paper utilizes the frozen element permeability method to compute the armature self-and mutual-inductance,permanent magnet d-and q-axis flux varying with d-axis and q-axis current,then an improved model is presented in which the core saturation and cross-saturation between d-axis and q-axis are considered effectively.Based on this model,the method for computing the performance of the generators is also proposed.Taking a 1.5-MW DDPMG as an example,the time-stepping finite element method(T-S FEM) is adopted to analyze the performance with no-load and loaded conditions,the results show a good agreement with the ones obtained by the improved model.Compared with the simplified model,it is demonstrated that the presented model has the high efficiency and reliability and can provide a good reference for optimization design of DDPMG and other PM motors.

关 键 词：d-q axis cross-saturation DDPMG improved simulation model parameters calculation Time-stepping FEM 

分 类 号：TM351[电气工程—电机] O141.4[理学—数学]