Induction Motor Speed Control Based on Inverse System Theory and Sliding Mode Method

For the problem that parameter uncertainty was usually neglected when inverse system theory was used in speed regulation system of induction motor, on the basis of non-linear model of induction motor, a pseudo-linear control system model of induction motor with uncertain rotor resistance and load was established by use of inverse system theory. A dithering-prevented and adaptive sliding mode variable-structure control method was proposed which was realized by use of variable exponential reaching law, and the control method was used in the pseudo-linear control system of induction motor. The simulation result showed that the control method can restrain uncertainty of system parameters and improve system stability and control accuracy.