Permanent magnet synchronous motor(PMSM)speed sensorless vector control system has eliminated the drawbacks of the traditional speed sensor,at the same time,it can improve the dynamic performance of the system,which has a very high research value.In this paper,based on the vector control of permanent magnet synchronous motor,on the basis of vector control,the closed-loop vector control system of permanent magnet synchronous motor is constructed,and the control of permanent magnet synchronous motor is generated by using space vector pulse width modulation technology,vector control system based on the model reference adaptive and the novel sliding mode observer is designed.First,the mathematical model of PMSM is described,and the PMSM vector control system is established,and the principle and method of SVPWM are briefly introduced.Based on the model reference adaptive(MRAS)and the improved sliding mode observer(SMO)vector control system,the method is used as the speed estimation method.The basic principle of MRAS is presented,and the process of building the MRAS vector control system is introduced in detail.In this paper,the mathematical model of traditional SMO is introduced,and the new control function is designed,and the on-line identification of stator resistance is introduced,through these two algorithms to achieve the motor speed of the effective tracking.In the Matlab/Simulink simulation platform of MRAS vector and the improved SMO speed identification control system based on the simulation platform of no-load and load,sudden and sudden load,anticlimax and sudden speed and tracking the position of the rotor at different speeds were simulated,and the analysis of the experimental results.Experimental results show that the speed identification system has a good speed,compared with the MRAS vector control system,the speed response of the improved SMO vector control system is more rapid,and the dynamic performance is better. |