Research On PMSM Speed Control System Based On Improved Self Anti-disturbance Control

As modern industry continues to develop,the high performance control of motors as a major source of power becomes increasingly important.Among them,permanent magnet synchronous motors have the advantages of high power factor,good reliability,small size and can meet the requirements for high performance speed regulation of motors,and they are used in large numbers in the field of new energy vehicles.In the permanent magnet synchronous motor control system,as the permanent magnet synchronous motor is a strongly coupled,non-linear,multi-variable control object,making the control system can not play the optimal control performance.In order to further realise the high performance control of PM synchronous motor,this paper studies the vector control method of PM synchronous motor with improved self-turbulence control based on self-turbulence control technology,the main research contents are as follows.1.This paper derives the mathematical model of permanent magnet synchronous motor in three commonly used coordinate systems,elaborates the principle of vector control strategy according to the mathematical model of permanent magnet synchronous motor,and simulates and analyses the principle and algorithm implementation of two-level space vector modulation technology in vector control strategy.2.Self-anti-disturbance control techniques are introduced to address the problem that the parameters of the self-anti-disturbance controller are difficult to rectify and in which the derivatives of the non-linear functions at the origin are not continuous and the segmentation points are not smooth,which causes the control performance to degrade.In this paper,we start from the non-linear function,select a better non-linear function according to the principle of non-linear function selection,and use it to construct the core components of the self-anti-disturbance controller,i.e.the dilated state observer and the non-linear state error feedback control law in the design of the improved self-anti-disturbance controller,and carry out stability analysis on it.The method reduces the number of parameters of the self-anti-disturbance controller and effectively compensates for the defects of the traditional non-linear function.3.Under the vector control strategy of permanent magnet synchronous motor,the current-loop improved self-anti-disturbance controller and the speed-loop improved self-anti-disturbance controller are designed,and the simulation results are compared with those of the traditional proportional-integral controller,the traditional self-anti-disturbance controller and the self-anti-disturbance controller based on the newfal function,and the results show that the improved self-anti-disturbance controller has better anti-disturbance performance,more accurate tracking performance and The results show that the improved SAC has better immunity,more accurate tracking performance and faster response performance.The improved self-adjoint controller and the vector control strategy designed in this paper can improve the control performance of the permanent magnet synchronous motor speed control system with excellent results in the simulation verification.Therefore,it provides a valuable study for further realisation of high performance control problems of PM SM.