Research On Robust Control For Permanent Magnet Synchronous Motor Based On Parameter Identification

PMSM is widely used in various fields by its outstanding advantages such as compact structure,high efficiency,high moment inertia and high power density.Because it is a kind of multi-variable,strong coupling,nonlinear model,when there are uncertain factors such as parameter perturbation or load disturbance in the speed regulating system,the traditional vector control will be difficult to gain the high performance control requirements of the motor speed regulating system,some advanced control strategies have been widely used in the speed regulating system.In order to improve the robustness and dynamic quality of the uncertain factors of the speed regulating system in the traditional PI control scheme,the following contents are studied in this paper:1 A sliding mode control strategy of PMSM Based on parameter identification is proposed.Firstly,the model reference adaptive method is used to identify the moment of inertia.Then,the load disturbance is observed by the observer and compensated to the sliding mode velocity controller in real time.Finally,a sliding mode control speed regulation system of PMSM is designed based on the moment of inertia identification and the extended state observer,which enhances the robustness of the system to the parameters and disturbances.2 An auto disturbance rejection control strategy for PMSM Based on parameter identification is proposed.Using Popov ultra-stability theory to identify the inductance online and compensate it to the q-axis auto-disturbance control current regulator,a surface-type auto-disturbance control speed regulation system for the permanent magnet synchronous motor based on inductance identification is designed to improve the rapid convergence of the current loop Performance and current tracking speed,the effectiveness of the method is verified through simulation.3 A sliding mode auto disturbance rejection control strategy based on parameter identification is proposed.Firstly,a cascaded sliding mode observer is proposed.The former uses the observer to estimate the back EMF,and the latter uses the observer to obtain the speed information,which solves the problem of phase delay in the traditional sliding mode observer.Then,the sliding mode ADRC speed and current controllers are designed,and the identified moment of inertia and inductance parameters are introduced into the cascaded sliding mode observer and the sliding mode ADRC to improve the robustness of the system,and the effectiveness of the method is verified by simulation.4 Through the hardware in the loop simulation platform,the proposed ADRC strategy of PMSM Based on parameter identification is verified.Through the analysis of the experimental results,the experimental results are consistent with the simulation experimental results,and the effectiveness of the control strategy is verified.