Improved Sensorless Control of Permanent-Magnet Synchronous Machine Based on Third-Harmonic Back EMF
Improved Sensorless Control of Permanent-Magnet Synchronous Machine Based on Third-Harmonic Back EMF
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DOI：
10.1109/tia.2013.2284299
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发表时间：
2014-05
影响因子：
4.4
通讯作者：
J. Liu;Z. Zhu
中科院分区：
文献类型：
--
作者：
J. Liu;Z. Zhu
本文提出了一种改进的基于三次谐波磁链的转子位置估计器，该磁链是三次谐波反电动势的积分。与传统的基于三次谐波磁链过零点的转子位置估计方法不同，该方法以连续信号为参考信号，推导出估计值与参考值之间的相位差，并利用该相位差补偿由每个采样时刻的过零点计算出的转速估计误差。然后，可以从补偿的转子速度导出转子位置，并且可以显著提高转子位置估计的精度，特别是在动态条件下。在dSPACE平台上对一台实验室永磁同步电机进行了多项实验，实验结果验证了改进的基于三次谐波磁链连续信号的转子位置估计器能够实现准确的转子位置估计和优异的动态性能。
This paper presents an improved rotor position estimator based on a third-harmonic flux linkage which is the integration of third-harmonic back electromotive force. Different from the conventional rotor position estimation based on zero crossings of a third-harmonic flux linkage, the continuous signal is taken as reference, and the phase difference between the estimated and reference third-harmonic flux linkages is derived and used to compensate the estimation error in the speed calculated from the zero crossings at each sampling instant. Then, the rotor position can be derived from the compensated rotor speed, and the accuracy of rotor position estimation can be significantly improved, particularly under a dynamic condition. Several experiments have been implemented on a dSPACE platform with a laboratory permanent-magnet synchronous machine, and the experimental results validate that the improved rotor position estimator based on the continuous signal of third-harmonic flux linkage can achieve accurate rotor position estimation and outstanding dynamic performance.