考虑激磁电感变化的感应电机模型

Model of Induction Motor Considering the Variation of Magnetizing Inductance

从电机的固有模型出发,根据其固定参数电机模型在αβ坐标系中的状态方程,结合激磁电感变化对电机性能的影响,推导了参数可变的感应电机模型。通过MATLAB/Simulink仿真分析激磁电感变化对感应电机性能的影响,在Ansoft软件平台上对额定功率为10 k W的三相感应电机进行有限元计算分析,得到激磁电感随电压、频率变化的关系曲线。再将激磁电感实时变化值用到参数可变的电机模型中,用矢量控制算法进行试验验证。结果表明,提出的参数可变化模型是可行的,得到的矢量控制算法可以提高感应电机控制性能,研究成果可为高精度感应电机模型的建立奠定基础。

Based on the intrinsic model of a motor, the induction motor model with variable parameters was derived,which combined with the influences of magnetizing inductance＇s variation on the performance of the motor, according to thefixed motor parameters in αβ coordinates equation of state. First, the effect of magnetizing inductance＇s changes on the performanceof induction motor was simulated and analyzed with MATLAB/Simulink, and the finite element analysis was implementedin the three-phase induction motor with rated power of 10 kW to get the curve of magnetizing inductance＇s changeswith voltage and frequency. Then, applying the magnetizing inductance＇s real-time changes in value to the motor modelwith variable parameters, the vector control algorithm was tested and verified. The results show that the proposed motormodel with variable parameters is feasible and the vector control algorithm can improve the control performance of the inductionmotor. The research results can provide a basis for the establishment of the precise induction motor model.