电感误差对高频电流控制器同步磁阻电机低速无位置传感器控制的影响

Tatsuki Hayashi, Koki Kataoka, M. Tomita, M. Hasegawa, S. Doki
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摘要

同步磁阻电动机(synrm)由于没有磁体和转子绕组而受到各种应用的关注。因此,提出了各种低速下无转子位置传感器控制的方法。同样,我们之前介绍了一种在非常低的速度下对synrm进行转子位置无传感器控制的方法。所提出的控制方法是利用高频电流控制系统将一个小的恒幅高频电流叠加在一起。SynRM的$q$轴电感根据负载有很大的变化。在本文中,我们证明了使用所提出的方法,即使在位置估计的SynRM模型的$q$轴电感的预定义值与实际值之间存在较大误差时,转子位置估计误差也收敛。实验结果表明,该方法即使在非常低的转速下也能实现对q轴电感变化的鲁棒无位置传感器控制。
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Effects of Inductance Error on Position Sensorless Control of Synchronous Reluctance Motor at Low Speeds Using High-Frequency Current Controller
Synchronous reluctance motors (SynRMs) have attracted attention for various applications because they have no magnets and rotor windings. Thus, various methods for rotor position sensorless control of SynRMs at low speeds have been proposed. Similarly, we previously introduced a method for rotor position sensorless control of SynRMs at very low speeds. The proposed control method superimposes a high-frequency current with a small constant amplitude using a high-frequency current control system. The $q$-axis inductance of the SynRM considerably changes according to the load. In this paper, we show that the rotor position estimation error converges even under a large error between the predefined and real settings of the $q$-axis inductance of the SynRM model for position estimation when using the proposed method. Experimental results confirm that the proposed method achieves robust rotor position sensorless control against $q$-axis inductance variations even at very low speeds.
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