基于气隙功率补偿改善电机低速性能的研究

Research on Improving IM Low Speed Performance Based on Compensation of Gap Power

研究了电机低速运行时的一种增强型开环控制方法。在分析开环增强型低速性能改善方法的基础上,对基于非线性气隙功率补偿方法进行了深入研究,结合矢量控制和标量控制的特点,给出最小限度的利用电机参数改善低速性能的补偿方法。最后对该方法进行了相应的仿真和物理实验,仿真和试验结果表明该方法在电机低频运行时速度平稳,速度静差小。

Detailed research has been done on an open-loop enhancing method during low speed. The meth- od, which is based on nonlinear gap power compensation, has been researched in detail. It combines the merit of vector control and scalar control and utilizes the least motor parameters as possible. By analyzing the pole locus of characteristic equation of the system, the influence of stator resistance voltage-drop compensation and low-pass filter on the system＇s stability is discussed. Finally corresponding simulation and physical experi- ments were given, in which the results demonstrate that the motor can run well in low frequency with speed er- ror towards zero under any load.