Application on Unloading Transient Electromagnetic Computation of Brushless AC Exciter with Magnet

To investigate the internal electromagnetic functional principle, dynamic characteristic and faults operational 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 has been widely used for electromagnetic computation. Since few theses adopt finite element method to analysis AC exciter with armature rotating structure of aeronautic AC power supply, this paper takes it for research object. It states the principle and process of two-dimensional transient field simulation modeling with Magnet software. Furthermore, it also simulates field distribution, electromagnetic and circuit parameters under unloading for AC exciter. With contrast to actual values, the model has been proved available to design and optimize this type of machine. 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.