Adaptive Control Method of Sensorless Permanent Magnet Synchronous Motor Based on Super-Twisting Sliding Mode Algorithm

To solve the problem of sensorless control method a permanent magnet synchronous motor, based on study mathematical model for motor and adaptation theory, reference equation adjustable are derived according to stator current equation. The correctness selected linear compensator matrix is strictly proved. Then, Popov’s super-stability theory used derive speed adaptive law prove its asymptotic stability. Based voltage closed-loop feedback MTPA weak magnetic strategy, simulation MRAS system built combined with principle MRAS. Aiming investigate that PI in traditional algorithm not robust, super-twisting sliding mode introduced replace law. observer STSM?MRAS designed. established. Under certain working conditions, simulated compared. results show can improve steady-state performance robustness system.