基于A-2-SMC开关磁阻电机直接转矩控制

Direct torque control of switched reluctance motor based on adaptive second-order sliding mode control

文中针对开关磁阻电机转矩脉动大及其控制系统难以实现快速精确调速的缺点,提出了一种自适应二阶滑模控制与直接转矩控制相结合的复合控制方案,并对该方案中的自适应二阶滑模控制器进行设计。该控制器采用超螺旋算法,同时对其增益采用自适应调节,克服了传统二阶滑模控制器增益确定依赖于扰动导数界值的缺点。仿真结果表明,文中所采用的控制方案不仅能对电机转速实现快速精确控制,而且能对电机转矩脉动进行有效抑制。

To reduce torque ripple and improve the robustness,convergence speed and control accuracy of the switched reluctance motor control system,this paper presents a composite controller including the adaptive-gain second-order sliding mode control and direct torque control. By the use of super-twisting algorithm and adaptive approach, the adaptive-gain second-order sliding mode control avoided the weakness that the determination of the gain should be based on the boundary of the disturbance 's derivative. The simulation results showed that the control scheme used in the paper not only controls the speed of the motor quickly and accurately,but also suppresses torque ripple of the motor effectively.