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首页> 外文期刊>IEEE Transactions on Power Electronics >Effects of Stator Iron Loss and Current-Loop Delay on Copper-Loss-Minimizing Torque Control of BLDCM: Analysis and Improvements
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Effects of Stator Iron Loss and Current-Loop Delay on Copper-Loss-Minimizing Torque Control of BLDCM: Analysis and Improvements

机译：定子铁损和电流延迟对BLDCM铜损最小转矩控制的影响：分析和改进

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摘要

Copper-loss-minimizing torque control (CLMTC) method has been widely studied to reduce electromagnetic torque ripple and minimize copper loss of a brushless dcmotor (BLDCM), but still suffers challenges to improve its performance. This paper presents a quantitative analysis of stator iron loss and current-loop delay effects on CLMTC. In the analysis, the iron-loss-included torque equation that only suits for sinusoidal back electromotive force (EMF) is modified to cover the case of nonsinusoidal back EMF. It is concluded that the iron loss effect brings about significant torque generation error and the delay effect leads to torque ripple that increases linearly with the delay angle. Two improvements are proposed, one of which redefines the condition of an optimal motor current vector to compensate for the iron loss effect. The other one aims to suppress the delay effect by preshaping current reference based on delay characteristic of the loop. The improvements can be performed effectively on a microprocessor to realize a better CLMTC method with reduced torque generation error and torque ripple. Both the analysis and improvements are experimentally validated on a 0.95 kW BLDCM setup.
机译：减小铜损最小转矩控制（CLMTC）方法已得到广泛研究，以减少电磁转矩脉动并最大程度地减小无刷直流电动机（BLDCM）的铜损，但仍面临提高其性能的挑战。本文对定子铁损和电流环路延迟对CLMTC的影响进行了定量分析。在分析中，修改了仅适合正弦反电动势（EMF）的含铁损的转矩方程，以涵盖非正弦反电动势的情况。结论是，铁损效应带来了明显的转矩产生误差，并且延迟效应导致转矩波动随延迟角线性增加。提出了两项​​改进，其中一项重新定义了最佳电动机电流矢量的条件，以补偿铁损效应。另一个旨在通过基于环路的延迟特性对电流基准进行预成形来抑制延迟影响。可以在微处理器上有效地执行这些改进，以实现更好的CLMTC方法，同时减少转矩产生误差和转矩波动。分析和改进均在0.95 kW BLDCM装置上进行了实验验证。

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