中文摘要：

针对大功率同步电动机动态数学模型非常复杂，求解其动态特性困难以及失步是造成其事故的主要原因等问题，研究了同步电机在两相旋转坐标系的简化数学模型，并由此设计了基于MATLAB／SIMULIK的可视化动态特性仿真模型．利用该模型进行了同步电动机短时断电后再恢复供电时，自动重整步和造成失步事故两种情况的动态过程的仿真实验并给出了结果波形．仿真结果正确，避免了实际实验对同步电动机和励磁装置的损害，能极大地节约实验成本并提高实验效率．

英文摘要：

Since the mathematical model of synchronous motor is very complex which makes it difficult to work out its dynamic characteristics,and that out-of-step is the main cause of the failure of the motor,the simplified model on rotary axis is studied,and the dynamic simulation model of visible synchronous motor based on MATLAB/SIMULIK is designed.The simulation experiment under two kinds of situation is conducted：automatically reforming step and resulting in out-of-step when synchronous motor first lost electric power shortly and then restored power.The right simulation waveform is obtained and the same time avoided experiments which are harmful to synchronous motors and excitation device.Consequently,the efficiency of experiment is improved significantly while the cost decreases greatly.