Evaluating the practical low speed limits for back-EMF tracking-based sensorless speed control using drive stiffness as a key metric
Evaluating the practical low speed limits for back-EMF tracking-based sensorless speed control using drive stiffness as a key metric
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DOI：
10.1109/tia.2011.2126013
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发表时间：
2009-11
期刊：
影响因子：
--
通讯作者：
R. Hejny;R. Lorenz
中科院分区：
文献类型：
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作者：
R. Hejny;R. Lorenz
虽然众所周知，反电动势跟踪具有低速度限制，但很少有公开文献评估此限制。本文表明，低速限制主要是逆变器谐波的幅值的函数，这意味着理论和仿真将提供错误的结果时，逆变器谐波不包括在内。本文还将提供一种方法来评估这个低速度限制使用驱动刚度作为度量。实验结果定量地显示了驱动刚度如何随着速度降低而受到影响，这最终设定了实际的低速极限。
Although it is widely known that back-EMF tracking has a low speed limit, there is very little published literature evaluating this limit. This paper shows that the low speed limit is mainly a function of the amplitude of the inverter harmonics, which means that theory and simulation will provide erroneous results when inverter harmonics are not incorporated. This paper will also provide a method for evaluating this low speed limit using drive stiffness as the metric. The experimental results shows quantitatively how the drive stiffness suffers as speed decreases, which ultimately sets the practical low speed limit.