In order to improve the efficiency of the electric locomotive, the MW-level direct-drive permanent magnet synchronous motor (DD-PMSM) is used to replace the original traction motor and gearbox in the electric locomotive. However, the DD-PMSM parameters will change with the operating conditions during the operation of the electric locomotive, and the absence of the gearbox in direct drives increases the sensitivity of the control performance to uncertainties in the drive system. In order to solve the problems, a novel robust adaptive (RA) current control of MW-level DD-PMSM for traction drives based on internal model control with disturbance observer (IMCDO) is proposed in this article. IMCDO is simply designed as the estimated uncertainty function, and simple control law is derived based on the Lyapunov function to guarantee the system stability and improve the antidisturbance performance. Then, in order to adjust the internal model disturbance observer properly, the observer gain selection criteria are given by using the stability analysis based on the discrete Lyapunov function. The proposed method in the article is verified on a 1.2-MW DD-PMSM, and the comparative experiments demonstrate the validity and effectiveness of the proposed method.

中文翻译：

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基于干扰观测器内部模型控制的 1.2 MW 直接驱动 PMSM 用于牵引驱动的鲁棒自适应电流控制

为提高电力机车的效率，电力机车采用MW级直驱永磁同步电机（DD-PMSM）代替原有的牵引电机和变速箱。然而，DD-PMSM参数在电力机车运行过程中会随着工况的变化而变化，直接驱动中没有齿轮箱增加了控制性能对驱动系统不确定性的敏感性。为了解决这些问题，本文提出了一种基于干扰观测器内模型控制（IMCDO）的牵引驱动MW级DD-PMSM的新型鲁棒自适应（RA）电流控制。IMCDO 被简单地设计为估计的不确定性函数，并基于李雅普诺夫函数推导出简单的控制律，以保证系统的稳定性，提高抗干扰性能。然后，为了适当调整内模扰动观测器，利用基于离散Lyapunov函数的稳定性分析给出观测器增益选择准则。本文提出的方法在1.2-MW DD-PMSM上进行了验证，对比实验证明了所提出方法的有效性和有效性。