【摘要】 为了实现异步电机转速的全局稳定非线性动态控制,应用无源性理论从能量的角度分析异步电机,从中分离出不必抵消的“无功力”,简化了异步电机的控制,并据此导出一个全局稳定的非线性动态输出反馈控制律。该控制律以变结构的方式注入非线性阻尼,以加速系统的收敛,并防止放大电流噪声。该控制律无需对转子电流进行观测,减少了计算量。系统实现时,构造了一个线性滤波器以避免转子角加速度的测量,同时实现了转速的闭环跟踪。仿直结果表明,该控制器具有良好的动态性能和较强的鲁棒性。更多还原

【Abstract】 In order to obtain a nonlinear dynamic control law which has global stability,the "workless force" is abstracted to simplify the induction motor control using the passivity theory.Moreover,nonlinear damping is injected in a variable structure mode so as to accelerate the rate of convergence as well as to avoid current noise being magnified.Computation is eased by the law as the rotor current observer is needless under this way.A linear filter is adopted in the system to obviate the measurement of angle acceleration and to achieve the closed-loop speed control.The simulation result indicates the good performance of the controller.更多还原