| With the development of national economy and the growth of military demand,electromagnetic launch system has become a research hotspot in various countries.Linear motor and its control system are important components of electromagnetic launch system.Based on the requirements of linear motor used for electromagnetic launch system,a double-sided flux-switching permanent magnet linear(DSFSPML)is proposed in this paper.The armature windings and permanent magnets of the DSFSPML motor are all located in the primary stator,while the secondary mover is only composed of segmented iron.Hence,it has high power density,strong load capacity,simple and reliable structure,which incorporates the merits of permanent magnet synchronous linear motor and linear induction motor,so it is suitable for high-speed launch applications.Firstly,the application background and research meaning of the DSFSPML motor are described,and the research status of segmented power supply control and fault-tolerant control of motor is overviewed.Secondly,the basic structure and working principle of the DSFSPML motor are analyzed,and the mathematical model of DSFSPML motor is established.The vector control strategy with i_d = 0 is researched,and the simulation research is carried out based on the simulation model of vector control system.Then,the simulation results of vector control are verified by the experiment results.The simulation and experiment results indicate that the DSFSPML motor can offer a very good dynamic performance based on the selected control strategyThirdly,the electromagnetic parameters in the stator section is analyzed based on the segmented structure of the DSFSPML motor.The segmented mathematical model of the DSFSPML motor is established.The simulation model of the segmented power supply control system of DSFSPML motor is built based on the power supply topology and vector control strategy.The simulation results of segmented power supply control of the DSFSPML motor are verified by experiment resultss.The simulation and experiment results show that the DSFSPML motor has good control effect based on the selected segmented control method.Then,based on the typical fault states of the DSFSPML motor,the coping methods are analyzed,and the appropriate inverter topology is selected to enhance the fault-tolerant ability of the DSFSPML motor control system.The fault-tolerant control strategy of motor is researched and the fault-tolerant control algorithm based on SVPWM is selected.According to the fault-tolerant strategy of the motor,the output thrust force of the segmented DSFSPML motor in fault state is derived in detail.The simulation model of fault-tolerant control system of the motor is built,and the fault-tolerant control performance of DSFSPML motor is simulated and analyzed.The fault-tolerant control performance of the DSFSPML motor is verified by the simulation results.Finally,the experimental platform of the DSFSPML motor is designed.The hardware system and software flow of the control system are introduced in detail,which lays a foundation for experimental verification. |
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