Study On Performance Of Permanent Magnet Synchronous Motor

With the lack of energy,ecological deterioration,environmental pollution and other issues have become increasingly prominent,the new energy industry in the world has been vigorously developed.Electric vehicles as low-carbon,low-energy new energy industry,has been rapid development.Permanent magnet synchronous motor(PMSM)with its high efficiency,small size,easy to control,etc.,are widely used in new energy electric vehicle power drive system.Firstly,the mathematical model of PMSM is established by analyzing the structure and working principle of PMSM.Then,we study the algorithm of voltage space vector control,and global optimization algorithm,analyze the working principle of the inverter and the mechanism of large current generated during starting and braking of PMSM,study the equivalent input disturbance algorithm and the state feedback decoupling controller and the high current suppression controller.Finally,we build a double closed loop control system of PMSM by the id=0 vector control strategy.The simulation results show that the controller based on the equivalent input interference algorithm can effectively suppress the fluctuation of the rotational speed and the ripple of the torque of the PMSM under load disturbance;the design of state feedback decoupling controller can avoid the dynamic coupling of PMSM;the global optimization algorithm can realize the global optimization of the control system and avoids local minimum;the integral separated PI controller can effectively suppresses the large current generated by the starting and braking process.By studying the performance of PMSM,the performance of electric vehicle is improved and optimized,and the comfort,stability and safety of electric vehicles is improved.