具有转子时间常数辨识的变频调速实验平台研制

Development of a variable frequency speed regulation experimental platform with rotor time constant identification

研究一种基于模型参考自适应(MRAS)的转子时间常数辨识方法:将转子磁链观测中的电压模型和电流模型分别作为参考模型与可调模型,通过自适应机构得到趋于实际值的转子时间常数辨识值。并设计了具有转子时间常数辨识功能的磁场定向控制变频调速实验平台。该实验平台硬件部分以智能功率模块(IPM)逆变电路和基于PCI总线的DSP运动控制电路为核心。在Visual C++环境下设计人机交互界面,编写优化控制算法。实验结果表明,该方案能减小转子时间常数变化对系统产生的影响,较好地改善系统的动静态性能。

Taking the voltage model and current model for rotor flux observation as the reference model and adjustable model respectively,this article puts forward a method for rotor time constant identification based on MRAS model,in which the identification value of rotor time constant obtained by the adaptive mechanism tended to the actual value,and an experimental platform based on field-oriented vector control with rotor time constant identification was proposed.The hardware of this experimental platform used the intelligent power model（IPM）DC-AC circuit and the DSP circuit of motion control with PCI bus as its core.The humancomputer interaction interface and optimization algorithm was designed under Visual C＋＋ environment.The experimental results show that the proposed method can reduce the impact of rotor time constant changes and improve the dynamic and static characteristics of the system effectively.