基于滑模变结构的感应电动机控制策略研究

Research of Control Strategy of Induction Motor Based on Sliding Mode Variable Structure

感应电动机是一个高阶、非线性、强耦合的多变量系统,在运行的过程中参数易受温度、负载变化的影响,会造成电动机进入不稳定区域运行。为了适应系统的非线性特性,提出了一种基于滑模变结构的控制策略。该策略对电流、转速、磁链误差分别建立滑模面,构造出各环节变结构控制器,并推导出自适应控制律。仿真结果证明了控制策略的有效性和可行性。

Induction motor is a high-level,non-linear,strong coupled and multi-variable system.When it＇s running,its parameters are influenced by temperature and load and caused the motor to run into unstable region.To adapt to its non-linear system property,a control strategy based on sliding mode variable structure was proposed.Sliding surface was established corresponding to current,rotate speed,flux error,variable structure controller of each link was constructed,and self-adaptive control law was derived.The simulation results showed that the control strategy has effectiveness and feasibility.