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Enhanced Position Observer Using Second-Order Generalized Integrator for Sensorless Interior Permanent Magnet Synchronous Motor Drives

机译:使用二阶通用积分器的增强型位置观测器,用于无传感器内部永磁同步电动机驱动器

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摘要

For the purpose of improving the performance of sensorless interior permanent magnet synchronous motor (IPMSM) drives, an enhanced electromotive-force (EMF)-based position observer adopting second-order generalized integrator (SOGI) to eliminate the harmonic error is proposed. The inverter nonlinearities and flux spatial harmonics that give rise to the harmonic error of position estimation are analyzed. A harmonic decoupling network consisting of multiple SOGIs based adaptive filters is adopted to achieve the multiple selective EMF harmonic elimination (MSEHE). The application of the frequency-locked loop ensures the SOGI resonance frequency adaptive, which is critical for the variable-speed operation in IPMSM drive applications. Using the SOGI-MSEHE in the position tracking estimator, the low-order harmonics in the estimated EMF can be effectively eliminated, contributing to cancelling the position estimation harmonic error. The effectiveness of the proposed enhanced position observer is verified by the experimental results at a 2.2-kW IPMSM sensorless drive.
机译:为了提高无传感器内部永磁同步电动机(IPMSM)驱动器的性能,提出了一种采用二阶广义积分器(SOGI)消除谐波误差的基于电动势(EMF)的位置观测器。分析了引起位置估计谐波误差的逆变器非线性和通量空间谐波。采用由多个基于SOGI的自适应滤波器组成的谐波去耦网络来实现多重选择EMF谐波消除(MSEHE)。锁频环的应用可确保SOGI谐振频率自适应,这对于IPMSM驱动器应用中的变速操作至关重要。使用位置跟踪估计器中的SOGI-MSEHE,可以有效消除估计的EMF中的低阶谐波,从而有助于消除位置估计谐波误差。在2.2 kW IPMSM无传感器驱动器上的实验结果验证了所提出的增强型位置观测器的有效性。

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