This paper focuses on the Field-Oriented Control (FOC) technology of Permanent Mag- net Synchronous Motors (PMSM). On the MATLAB/Simulink simulation platform

the performance of traditional PI control

Sliding Mode Control (SMC)

and Extended Kalman Filter (EKF) algorithms are discussed and compared. By establishing a complete mathematical model and control strategy

the advantages and disadvantages of each algorithm in speed response

torque ripple

and anti-interference ability are analyzed. Simulation results show that traditional PI control has good stability

SMC has excellent robustness

and EKF can effectively achieve high-precision sensorless estimation. This study provides a theoretical basis and simulation reference for the selection of PMSM control schemes in dif- ferent application scenarios.