Analysis and Compensation of Inverter Nonlinearity Effect on a Sensorless PMSM Drive at Very Low and Zero Speed Operation
Analysis and Compensation of Inverter Nonlinearity Effect on a Sensorless PMSM Drive at Very Low and Zero Speed Operation
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DOI：
10.1109/tie.2010.2044116
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发表时间：
2010-03
影响因子：
7.7
通讯作者：
R. Raute;C. Caruana;C. Staines;J. Cilia;M. Sumner;G. Asher
中科院分区：
文献类型：
--
作者：
R. Raute;C. Caruana;C. Staines;J. Cilia;M. Sumner;G. Asher
在文献中已经很好地建立了逆变器非线性效应折磨基于凸极的无传感器驱动器。逆变器的非线性导致产生破坏有用位置信息的信号。所产生的效果取决于驱动器中使用的注入方法。在文献中已经发表了克服这种效应的各种补偿技术。本文研究了零矢量电流导数技术。详细研究了逆变器功率器件导通电阻变化对位置信号的影响。对破坏信号源的了解有助于补偿并确定其适用性。比较了逆变器非线性补偿的两种方法。第一种方法利用离线处理数据的查找表，而第二种方法是基于逆变器开关器件的电流依赖性电阻特性的更简单的方法。无传感器条件下的实验性能示出这两种方法。
It has been well established in the literature that inverter nonlinearity effects afflict saliency-based sensorless drives. The inverter nonlinearity leads to the generation of signals that corrupt the useful position information. The resulting effect differs depending on the injection approach utilized in the drive. Various compensation techniques to overcome this effect have been published in the literature. This paper is concerned with the zero-vector current-derivative technique. The effect of the varying ON-state resistance of the inverter power devices on the position signal is investigated in detail. Knowledge of the source of the corrupting signals facilitates compensation and determines its applicability. Two approaches for inverter nonlinearity compensation are compared. The first approach utilizes a lookup table from offline-processed data, while the second one is a simpler approach based on the current-dependent resistance characteristic of the inverter switching devices. Experimental performance under sensorless condition is shown for both approaches.