多采样率控制理论在矢量控制中的研究与实现

摘要

The traditional models of rotor flux observation, such as the current model and voltage model, are calculated by integrating the stator current or voltage.lt introduces the accumulated error of integral inevitably and reduces the observational accuracy of rotor flux.As a result,it affects the control performance of the system.To solve this problem, a novel method to calculate stator flux of induction motor is proposed based on multirate control theory.And the correctness and feasibility of the method are verified respectively by using Matlab software and DSP device.The experimental results indicate that the algorithm can observe the rotor flux of induction motor well and improve the controlling performance of the AC drive system.%在矢量控制中,传统的电流、电压模型等转子磁链观测模型,均以定子电流或电压进行积分求得,必然会引入积分累积误差,从而降低磁链观测的精度,影响系统的控制性能.针对该问题,在此利用多采样率控制理论提出了一种新的无积分累积误差的转子磁链观测算法,并通过仿真和实验验证了该算法的正确性和可行性.实验结果表明该算法能很好地观测转子磁链并改善系统的控制性能.