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将线性自抗扰控制器(LADRC)应用到永磁同步电机调速系统中,将电流环中的反电势耦合项、定子电阻压降和转速环中的负载转矩和粘滞摩擦等作为扰动量,并采用扩张状态观测器(LESO)和线性反馈控制律(LSEF)抵消转速环、电流环中的扰动,实现转速环、电流环的完全解耦控制,有效提高了低速、加载、卸载时的转速稳定性。给出了基于转速环、电流环带宽指标的LADRC参数整定公式,并通过仿真和实验验证了该算法的有效性。
The linear self-reactance disturbance controller (LADRC) is applied to the PM synchronous motor speed regulation system. The back electromotive force coupling term in the current loop, the stator resistance voltage drop, the load torque in the speed loop, the viscous friction and so on are regarded as the disturbances The LESO and LSEF are used to counteract the perturbations in the speed and current loops to complete the decoupling control of the speed and current loops and effectively improve the speed at low loads and unloads Speed stability. The tuning formula of LADRC parameters based on speed loop and current loop bandwidth is given, and the effectiveness of the algorithm is verified by simulation and experiment.