Improved method for higher dynamics in sensorless position detection
Improved method for higher dynamics in sensorless position detection
复制标题
无传感器位置检测中更高动态的改进方法
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
P. Mutschler
中科院分区：
文献类型：
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作者：
R. Leidhold;P. Mutschler
永磁同步电动机（PMSM）转子位置的无传感器检测方法有很多种，都是通过评估磁各向异性来实现的。在本文中，一个基于交流电压载波注入被认为是。它能够检测各向异性，并通过其手段的rotorpsilas的位置，没有任何额外的硬件或修改的采样时间。它将被证明是有界的载波频率的Anverpsilas动态。载波通常是正弦的，频率约为开关频率的1/4或更低。作为改进位置观测动态的措施，将使用具有最高可能频率（即开关频率）的方波载波。此外，载波响应将与受控q电流解耦，以避免通常的带通滤波器。该滤波器将在观测器环路中引入显著延迟。频率增加以及滤波器的移除允许位置估计中的更快时间响应。实验结果表明，改进的estimationpsilas动态。
Numerous methods have been published for sensorless detection of the rotor position in PM synchronous motors (PMSM) by evaluating the magnetic anisotropy. In this paper, the one based on the injection of an alternating voltage carrier is considered. It is able to detect the anisotropy, and by its means the rotorpsilas position, without any additional hardware or modifications on the samplings times. It will be shown that the observerpsilas dynamics is bounded by the carrier frequency. The carrier is usually sinusoidal and with a frequency of about 1/4 of the switching frequency or lower. As a measure to improve the dynamics of the position observation, a square wave carrier with the highest possible frequency, namely the switching frequency, will be used. In addition, the carrier response will be decoupled from the controlled q-current in order to avoid the usual bandpass filter. This filter would introduce a significant delay in the observer loop. The frequency increase, together with the removal of the filter allows a faster time response in the position estimation. Experimental results showing the improvements in the estimationpsilas dynamics are presented.