Aviation Permanent Magent Synchronous Motor Starting/power Generation System Control Strategy Research

In recent years,with the development of science and technology,special equipment has been continuously updated and iterated,the electrical load of more electrical aircraft(MEA)is also increasing,and the capacity of multi-electric aircraft has also increased with the increase of load,and the increase of capacity has put forward higher requirements for the power supply system of multi-electric aircraft.Permanent Magnet Synchronous Generator(PMSG)has the advantages of simple structure,high operating efficiency and high reliability,and is very suitable for use in the aerospace field.With the rapid development of power electronics technology,PMSG system based on PWM rectification and other technologies has also been developed rapidly,which better exerts its advantages of high efficiency and high power density,and improves the comprehensive performance of aviation power generation system,so the research on permanent magnet synchronous motor power generation system for aviation has good practical significance.This paper focuses on the control strategy of starting/generating system of aviation permanent magnet synchronous motor,which includes:Firstly,the research background and significance of the project and the research status of aviation permanent magnet motor and its control strategy are introduced.The structure and parameters of the selected aviation permanent magnet synchronous motor are mainly introduced,the mathematical model of the PWM rectifier power generation system of permanent magnet synchronous generator in the axis is derived,and the simulation model is built in Matlab/Simulink according to the mathematical model,which provides a theoretical basis for subsequent research work.The control strategy of the starting/generating system of permanent magnet synchronous motor is highlighted.The control strategy in the starting stage adopts double closed-loop vector control,because the traditional PI controller parameters need to be designed according to the mathematical model,the calculation amount is large and the parameters are difficult to tune,so the improved Beetle Swarm Optimization Algorithm(BSO)is used to tune the parameters of the PI controller.Firstly,a double closed-loop vector control simulation model of permanent magnet synchronous motor is established,and the specific iterative process based on BSO-PI algorithm is introduced,and then the improved BSO algorithm is applied to PI control,and finally the BSO algorithm has good effects in the adjustment time and overshoot through simulation experiments.The control strategy of the power generation system adopts double closed-loop vector control,and due to the poor robustness of the traditional PI controller to the system parameter change and load disturbance,the improved sliding mode control of exponential approximation rate is proposed to apply the voltage loop method of the power generation system.According to the mathematical model derived in Chapter 2,the sliding mode controller is built in Matlab/Simulink,and the improved sliding mode control stability,approach time and jitter problems are analyzed in detail.The simulation results show that the proposed sliding mode control method has good antiinterference performance and good robustness when the load changes.Finally,by building an experimental platform,the effectiveness of the proposed control strategy is verified,the control strategy in the starting stage has good effects in improving the overshoot and adjustment time,and the control strategy in the power generation stage has good anti-interference ability and robustness when the load changes.