有限元耦合模型在航空电源瞬态特性中的研究  

Transient Performance Analysis for Aeronautic Power Supply Based on Finite Element Coupling Model

作　　者：马晓荷[1] 沈颂华[1] 

机构地区：[1]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：《系统仿真学报》2009年第11期3228-3233,共6页Journal of System Simulation

摘　　要：针对航空交流电源中旋转电枢式无刷交流同步发电机组的内部电磁场运行原理、瞬态运行特征及故障工况研究,传统解析法受前提条件限制不能进一步提高分析能力,而有限元法是分析电机的常用数值计算方法。多数文献只选择旋转磁极式主发电机进行了电磁分析。这里在忽略端部漏抗的前提下,提出用二维有限元法建立直流电流源激励的旋转电枢式交流励磁机瞬态电磁场耦合模型,推导了迭代方程组的数学表达式,利用离散化法解算得到交流励磁机的瞬态磁路和电路特性,通过对某型航空交流电源的交流励磁机的实例建模分析,验证了方法的正确性,对于研究交流电源中旋转电枢式结构的交流励磁机的瞬态电磁特性起到了重要的参考价值。To investigate internal electromagnetic principle, dynamic characteristic and faults performance of brushless AC synchronous generator with rotating rectifier in Aeronautic AC Power Supply, traditional analytical method is restricted by precondition and cannot improve anymore, while Finite Element Method （FEM） is one of the most widely used numerical computing method to analyze generators. Furthermore, lots of theses play emphasis on main generator electromagnetic analysis with magnetic pole rotating. So two-dimensional FEM is introduced to establish AC exciter transient electromagnetic coupling model with armature rotating by DC source excited, expression of iterative equations is deducted, magnetic performance and dynamic characteristics are attained by discrete method. Through a concrete instance of a certain AC exciter in Aeronautic AC Power supply, the correctness of the method was verified. Meanwhile, this method can be extended in other aeronautic AC Power Supply modeling and lays a foundation of optimal design of AC Power Supply system.

关 键 词：航空电源 交流励磁机 有限元法 电磁耦合 瞬态特性 

分 类 号：TM301[电气工程—电机]