永磁同步电机的建模与参数辨识_王明松 - 副本.doc

北京建筑大?学 题 目 永磁同步电?机的建模与?参数辨识 学 生 王明松 学 号 21085?21314?124 指导教师 张立权 年 级 2014级?硕研 专 业 建筑电气 学 院 电信学院 摘 要 永磁同步电?机由于其优?越的性能而?泛广的应用?于精确的伺?服控制控制?系统中，针对电机的?参数会随着?工作环境的?变化而变化?，导致控制的?精度受到很?大影响。提出采用实?时地对电机?参数进行辨?识，成为提高整?个系统性能?的保证。在深入分析?永磁同步电?机的电磁特?性后，推导出永磁?同步电机在?两相静止坐?标下的电机?数学模型; 并在该数学?模型下利用?递推最小二?乘法编写辨?识算法，对电机的参?数进行在线?辨识。利用 matla?b 软件平台构?建永磁同步?电机双闭环?仿真模型进?行仿真，仿真结果表?明算法能精?确地辨识电?机的参数，具有较好的?鲁棒性。从而证明上?述方法的正?确性，能够提高控?制系统的精?度。 关键词: 永磁同步电?机; 递推最小二?乘法; 参数辨识 Model?ing and Param?eter Ident?ifica?tion of Perma?nent Magne?t Synch?ronou?s Motor? ABSTR?ACT: The perma?nent magne?t synch?ronou?s motor?( PMSM) has been widel?y used in many accur?ate servo? contr?ol syste?ms for its excel?lent quali?ties． Howev?er the motor? param?eters? vary with the chang?ing work envir?onmen?ts，resul?ting in the preci?sion of contr?ol syste?m to be affec?ted． Real － time ident?ifica?tion of motor? param?eters? is a guara?ntee for impro?ving overa?ll syste?m perfo?rmanc?es． Based? on deep analy?sis of the elect?romag?netic? chara?cteri?stics? of perma?nent magne?t synch?ronou?s motor?，the mathe?matic?al model? of perma?nent magne?t synch?ronou?s motor? is deriv?ed in the stati?onary? two － phase? of the motor? coord?inate?s． And recur?sive least? squar?e is choos?ed for onlin?e ident?ifica?tion of motor? param?eters? under? this mathe?matic?al equat?ion． Matla?b / simul?ink is used to creat?e the simul?ation? syste?m of doubl?e close?d loop contr?ol syste?m． Simul?ation? resul?ts show that the metho?d can quick?ly and accur?ately? ident?ify the motor? param?eters? and has good robus?tness?． The algor?ithm is prove?d corre?ct，and can impro?ve the accur?acy of contr?ol syste?m． KEYWO?RDS: Perma?nent magne?t synch?ronou?s motor?; Recur?sive least? squar?es; Param?eter ident?ifica?tion 1 引言 永磁同步电?动机是一个?强耦合非线?性系统，在建模过程?的误差将导?致电机模型?具有一定的?不确定性。故精确地建?立电机模型?成为提高控?制精度的关?键。在矢量控制?系统中，需要对电机?参数进行准?确的辨识以?实现对电机?的转子磁场?定向控制，而电机的定?转子参数会?随着温升和?磁路饱和发?生变化，是一种不确?定的时变参