关键词: 单绕组, 磁悬浮开关磁阻电机, 直接转矩, 直接悬浮力控制, 超螺旋算法, 二阶滑模

Abstract: In order to solve the problems of torque and suspension force jitter, and rotor position offset in the control system of the single winding bearingless switched reluctance motor, direct torque control and second order sliding mode direct suspension force control were studied. In view of the single winding operation mode, a five level power converter was adopted. Based on Maxwell stress and mechatronic energy conversion principle, the direct numerical analysis model of flux, voltage, torque and suspension force were deduced, and the voltage input module was constructed to realize torque and suspension force decoupling control. A super twisting algorithm suitable for the two order system was constructed by introducing a higher order derivative term of displacement. Based on this algorithm, a rotor displacement controller was designed. The prototype control system was constructed. The results show that the direct torque and second-order sliding mode direct suspension force control can effectively reduce the chattering of the system, achieve high-precision rotor suspension, improve the dynamic suspension performance, and have strong robustness.