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

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.