Drive And Control Of Permanent Magnet Synchronous Motor

With the continuous advancement of Industry 4.0 and the prosperity of emerging industries such as new energy electric vehicles and new energy wind power generation,people have higher and higher performance requirements for servo motors and more and more diversified functional requirements.Permanent magnet synchronous motors stand out among other servo motors due to their small size,low cost,and high efficiency,and are used in many servo control system application scenarios that require high performance and accuracy.Therefore,the adoption of advanced and superior permanent magnet synchronous motor drive control strategies is of great significance to the development of servo motors in modern industries.However,the mathematical models of permanent magnet synchronous motors are mostly nonlinear,high-order,and highly coupled.Traditional PI controllers cannot effectively overcome the above problems.Therefore,this article will focus on the theory of active disturbance rejection control and sliding mode control.Research on its servo drive control technology.First,the mathematical models of permanent magnet synchronous motors in different coordinate systems are introduced,and then the control method of stator current in vector control is introduced.The stator current control strategy adopted in this paper is introduced.Then the space vector pulse width modulation technology of the drive system is introduced,and the drive circuit of the permanent magnet AC servo motor is designed on the chip based on STM32 F405.Then,in order to improve the stability of the permanent magnet synchronous motor double closed-loop drive system,in the inner loop current loop,for the traditional sliding mode control chattering problem and the non-linear disturbance problem that does not consider the incomplete decoupling,it is established to consider the internal non-linear disturbance.Based on the dynamic model of permanent magnet synchronous motor,the current controller based on the non-singular terminal sliding mode method is designed,and the speed controller is designed based on the auto-disturbance rejection control architecture in the outer loop speed loop.First,by arranging the transition process,the fastest speed is adopted.Control replaces PD control to improve the response speed of the system.The extended state observer is used to realize real-time estimation and compensation of system disturbances and reduce the degree of dependence on the model.Finally,based on the comparative analysis of modeling and simulation,the current accuracy in the current loop is significantly improved,the chattering problem common in traditional sliding mode control is eliminated,and the response speed is also improved,and the rise time required to reach the rated speed in the speed loop is greatly reduced.,It is not sensitive to the disturbance of the resistance inductance parameters of the motor,showing strong anti-interference ability.Therefore,it is confirmed that the designed controllers have improved the steady-state and dynamic performance,and enhanced the anti-disturbance and robustness of the PMSM control system.