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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。
Aiming at the operation principle, transient operating characteristics and fault conditions of the rotating armature brushless AC synchronous generator in AC power supply, the traditional analytical method can not further improve the analysis ability under the preconditions, and the finite element method Commonly used motor numerical calculation method. Most documents only choose the rotating magnetic pole main generator for electromagnetic analysis. In this paper, the transient electromagnetic field coupling model of rotating armature AC exciter with DC current source excited by two-dimensional finite element method is proposed on the premise of neglecting the end leakage resistance. The mathematical expression of iterative equations is deduced. By solving the transient magnetic circuit and circuit characteristics of AC exciter, the method of AC excitation of a certain type of AC AC power supply is established. The correctness of the method is verified. The exchange of exciting machine transient electromagnetic properties played an important reference value.