基于转矩补偿的永磁同步电机自抗扰控制研究

电动汽车永磁同步电动机( PMSM) 驱动系统运行在复杂多变的工况下，存在负载转矩扰动的问题。为减小负载转矩扰动引起的转速脉动，提高电动汽车抗干扰能力，提出了基于转矩前馈补偿的自抗扰控制(ADRC)策略。该控制方法使用自抗扰控制技术设计了速度控制器能实时补偿系统的扰动；并通过设计降维负载观测器来实时观测电机负载转矩变化，并将观测值反馈到电流环中，对负载扰动进行前馈补偿，增加了系统的抗干扰能力，提高了系统的鲁棒性。仿真结果表明，该方法可以增强系统的鲁棒性，提高系统的抗扰动能力。

Research of Active Disturbance Rejection Control for PMSM Based on Load Torque Compensation

The permanent magnet synchronous motor ( PMSM) drive system of electric vehicle has a load torque disturbance problem, because of complicated and changeable working conditions. In order to reduce the effect of load torque disturbance to the motor speed, and improve the anti-jamming performance, a novel control method, which combined the active disturbance rejection (ADRC) control and reduced order disturbance observer, was proposed. The ADRC technology was applied to the speed controller to compensate system perturbation on real time; Reduced order disturbance observer was designed to estimate the disturbance torque, and the observed value was fed back to the current loop to achieve its load disturbance feed forward compensation of the system, which enhanced the anti-disturbance capacity and improve the robustness of the System. The simulation results show that, the robustness of the system speed control is enhanced markedly and the capacity of anti-disturbance is also improved significantly, with the proposed control strategy.