In this study, a decoupling current regulator with a simple design approach aiming to mitigate cross-coupling effects during torque or speed disturbance is proposed for induction motor (IM) drives that operate at the low switching frequency. The proposed control method consists to derive a decoupling transfer matrix from the plant accurate model that is inserted at the output of the current controller, while traditional methods consider the feedback synchronous currents or their errors to calculate the compensation terms. The proposed method allows the controlled system to be equivalent to a dual single-input–single-output system without cross-coupling terms. The performances of this method have been validated through simulations and experiments on a 3-kW IM powered by a 3-level neutral-point clamped inverter at different operating conditions. The results show that the proposed decoupling approach provides additional bandwidth frequency than traditional approaches from literature. This characteristic translates into fast response time and improved decoupling dynamics at various operating conditions.

中文翻译：

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大功率驱动系统中感应电动机控制的同步框架去耦电流调节器：建模和设计

在这项研究中，针对以低开关频率运行的感应电动机（IM）驱动器，提出了一种旨在简化转矩或速度扰动期间的交叉耦合效应的简单设计方法的去耦电流调节器。所提出的控制方法包括从工厂精确模型中导出一个解耦传递矩阵，该模型被插入电流控制器的输出中，而传统方法则考虑反馈同步电流或其误差来计算补偿项。所提出的方法使受控系统等效于没有交叉耦合项的双路单输入单输出系统。该方法的性能已经通过在不同工作条件下，由3级中性点钳位逆变器供电的3kW IM上的仿真和实验得到了验证。结果表明，所提出的去耦方法比文献中的传统方法提供了额外的带宽频率。该特性可在各种操作条件下转化为快速响应时间并改善去耦动力学。