交流励磁机的有限元多元化参数计算及瞬态仿真  

Finite Element Method Multiple Variables Parametric Computation and Transient Simulation on AC Exciter

作　　者：马晓荷 沈颂华[2] 

机构地区：[1]海基盛元信息科技有限公司,上海200235 [2]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《微电机》2010年第3期32-36,共5页Micromotors

摘　　要：由于交流励磁机电枢绕组电流在导通期间的时变性以及铁磁材料饱和特性的影响,瞬态电感是转子位置和电枢绕组电流的多元函数,解析法难以准确计及电流时变性和铁磁材料饱和性的影响。这里采用二维有限元多元化参数法建立交流励磁机的电磁场约束模型,并定量计算了转子位置、励磁电流以及电枢电流变化对瞬态电感矩阵的影响,利用该计算结果对交流励磁机在三相稳定短路、两相对地短路和单相接地短路等瞬态特性进行了仿真试验,进一步证明基于"场"的方法计算瞬态电感矩阵的可行性。Due to transient inductances of AC exciter are functions of rotor position and armature winding currents,which are easily influenced by armature current switch on and ferromagnetic material saturation,therefore,analytical method has its limitation to consider current time-variation and ferromagnetic material saturation.The paper introduced two-dimensional finite element method multiple variables parametric computation to establish constraint electromagnetic model on AC exciter.Meanwhile,it computed the influence of rotor position,excitation and armature current variation against transient inductance matrix.The computation results simulate several transient characteristic experiments including three-phase steady short circuit,two-phase to ground short circuit and single-phase to ground short circuit,which can further prove the above transient inductance matrix method based on ＂field＂ is more precise.

关 键 词：交流励磁机 多元化参数法 瞬态电感矩阵 

分 类 号：TM381[电气工程—电机] TM301.3