【摘要】 为了解决"感应电机运行过程中由电机参数变化引起的转子磁场定向不准确"的问题,根据龙贝格观测器原理提出了一种新颖的参数自适应转子磁链观测器。首先论述了观测器的设计原理,针对磁链误差无法获得这一问题提出了一种有效的解决方案,引入了新变量,然后根据Lyapunov稳定性原理设计出参数自适应律。最后分别在Matlab和DSP2812平台上对该算法的参数收敛性以及定子电阻误差对观测器的影响进行了验证。仿真和实验结果表明,该方法不但可以对转子磁链加以观测,还可以同时在线调整并辨识转子电阻以及转子时间常数,对定子电阻具有很强的鲁棒性。更多还原

【Abstract】 In order to solve the problems of the field oriented inaccuracy caused by the variation of induction motor parameters during operation,a novel flux observer with parameters adaptive was proposed based on Luenberger observer.Firstly,the principle of the observer was elaborated.To aviod the flux error,which is unavailable,a new variable was introduced.Then,the adaptive laws of motor parameters was designed based on Lyapunov equation.Finally,the convergence of the algorithm and the effect of stator resistance mismatch were evaluated on Matlab and DSP2812 respectively.Simulations and actual experiments show that the method can observer the rotor flux with auto-tuning rotor resistance and rotor time constant identification.The algorithm is robust to stator resistance.更多还原