Design And Research Of PMSM Feedback Linearization Control System Based On Bus Voltage Adjustment

The development of power electronics technology has made the motor widely used as the core component of energy conversion.Permanent magnet synchronous motors(PMSM)stand out from various types of motors because of their higher energy conversion efficiency and power density.This paper focuses on the accuracy and stability of the motor in actual engineering,and introduces feedback linearization control technique.The nonlinear control technique is used to develop the irregularity of the converter and the nonlinear dynamic behavior of the PMSM,and ultimately to achievely explore the control strategy of PMSM.First of all,the input-output feedback linearization technique is used to transfer the nonlinearised control system of motor model into a linearised system model.Afterward,the global decoupling and overall linearization control of the PMSM control system are realized,which improves the stability performance and control accuracy of the motor controller.Finally,the control strategy of regulation modulation ratio to study the stability of the converter output voltage is proposed to establish a voltage control function which further improves the stability of the PMSM control system.The design and research of PMSM feedback linearization control system based on voltage adjustment can further promote the development of nonlinear control field and help industrial control applications.This paper first analyzes the basic PMSM control system model and its nonlinear control system model,and introduces the feedback linearization theory.Then,based on the PMSM affine nonlinear system model,the system control system is designed using input-output feedback linearization control technology to transfer the system model into a linearised system model.To improve the system performance,a load estimator is used to compensate the external load and the influence of the parameter variations as well.In addition,an_∞controller is designed to achieve robust performance of the position control system.As a result,according to the designed experimental platform,the controller is simplified and the theoretical analysis is completed.The experimental data were compared with traditional PI double closed-loop controller from the perspective of low-speed and stable-speed operation of the motor.Furthermore,the control strategy of regulation modulation ratio to improve the stability of the converter output voltage is proposed.So,complete a comparative study of experimental data with or without a speed feedback voltage regulation algorithm.In the whole simulation and experiment,this paper uses Matlab/Simulink to build a simulation modern,and verifies the proposed algorithm on an experimental platform with TMS320F28335 as the control core.Several simulation and experimental results show that the proposed system has fast transient responses,good load disturbance rejection responses and good tracking responses.A novel,advanced PMSM control system with the voltage adjustment of regulation modulation ratio for input-output feedback linearization technique has the advantages of small overshoot,small static error,strong robustness and high control accuracy.