Research On Dual-mode Fault-tolerant Control Strategy For Dual-winding Permanent Magnet Motor Drive System

As an important part of the tank,the tank gun control system plays a vital role in accurately hitting the target with the tank gun and destroying the enemy’s fortifications.Its special use scenarios have high requirements on the reliability and control performance of the system.In the harsh environment of the battlefield,the motor drive system is prone to electrical faults,which can cause the motor to fail to operate normally,and even affect the performance of the entire system.The dual-winding permanent magnet fault-tolerant motor(DWPMM)combines the advantages of high power density,small size and good speed regulation performance of the permanent magnet motor,as well as strong fault-tolerant performance and high reliability,which has broad application prospects in the electric drive system of tank artillery.Improving the control performance and fault-tolerant ability of the motor are the key factors to ensure the reliable operation of the gun control system.In this paper,the control strategy of dual-winding permanent magnet fault-tolerant motor drive system and fault-tolerant operation are studied.The structure and characteristics of dual-winding permanent magnet motor are introduced,and its mathematical model is established.The system requires one single power supply,a small number of power tubes,and can adapt to a simpler fault-tolerant operation control strategy,with stable fault operation capability.Aiming at the shortage of the response speed of the traditional three-loop control of the gun control system,combined with the aiming working mode and the stable working mode of the tank gun control system,a dual-mode control strategy of the dual-winding permanent magnet fault-tolerant motor is proposed,which improves the response speed of the system.Aiming at the situation of any two-phase open-phase fault in the DWPMM,based on the principle of constant magnetomotive force,a fault-tolerant operation control strategy is proposed.The analysis of the principle enables the motor to maintain normal operation in the state of any two-phase occurring open-phase fault,and improves the robustness of the system.The dual-mode control structure and fault-tolerant control strategy of DWPMM are simulated and analyzed by using MATLAB/Simulink model.Based on the real-time digital controller and modular driver,the experimental platform of DWPMM is built,the two-mode control strategy and fault-tolerant operation control strategy are verified by experiments.The experimental results prove the feasibility and validity of the above theory.