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Robust voltage model flux estimator design with parallel vector compensator for sensorless drive of induction motors
Journal of Power Electronics ( IF 1.4 ) Pub Date : 2020-10-19 , DOI: 10.1007/s43236-020-00149-w
Gwon-Jae Jo , Jong-Woo Choi

Flux estimator (FE) is critical for achieving high-performance sensorless drive of induction motors. A voltage model (VM) is an excellent candidate for a FE since it does not require speed information and has a simple structure. A VM using a closed-loop style has excellent sensorless drive capability over a wide speed range. However, it is limited by the uncertainties such as offset and parameter mismatch. This paper presents an improved a closed-loop style FE. To overcome the problems inherent in the conventional FE, a hybrid strategy for the changeover between control modes is applied. In the setting of the FE’s cutoff frequency (CF), the influences of the offset and parameter mismatch are analyzed. The phase distortion and acquisition of the back electromotive force are also analyzed. From this analysis, a vector compensation strategy for the flux linkage is applied. This strategy facilitates the CF setting, which improves the robustness against both the offset and parameter mismatch. Finally, the effectiveness of the proposed FE in a sensorless driven induction motor is verified using simulations and experiments under various conditions.

中文翻译:

用于感应电机无传感器驱动的具有并行矢量补偿器的稳健电压模型磁通估计器设计

磁通估算器 (FE) 对于实现感应电机的高性能无传感器驱动至关重要。电压模型 (VM) 是 FE 的绝佳候选,因为它不需要速度信息并且结构简单。使用闭环方式的 VM 在很宽的速度范围内具有出色的无传感器驱动能力。然而,它受到偏移和参数不匹配等不确定性的限制。本文提出了一种改进的闭环式有限元。为了克服传统有限元固有的问题,应用了控制模式之间切换的混合策略。在FE的截止频率(CF)的设置中,分析了偏移和参数失配的影响。还分析了反电动势的相位畸变和获取。从这个分析来看,应用了磁链的矢量补偿策略。这种策略有利于 CF 设置,从而提高了对偏移和参数不匹配的鲁棒性。最后,在各种条件下使用模拟和实验验证了所提出的有限元在无传感器驱动的感应电机中的有效性。
更新日期:2020-10-19
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