Control of High-Speed Sensorless PM Brushless DC Motors

2010 IEEE Industry Applications Society Annual Meeting Pub Date : 2010-11-01 DOI:10.1109/IAS.2010.5614566

K. Wang, M. Rahman, J. Shen

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引用次数: 8

Abstract

Due to inherent high efficiency and high power density, high-speed permanent magnet brushless dc motors have been extensively studied and utilized in many fields. Sensorless operation can significantly improve system reliability and reduce the performance variations caused by discrete sensors. From the system point of view it is often necessary to consider sensorless operation at the motor design stage. Among various sensorless commutation techniques available for the PM brushless dc motor drives, the one based on the detection of zero-crossings of the third-harmonic back-EMF is most common. However, duo to the high speed operation, the free-wheeling diodes may conduct by over 300 elec., which has no influence on the detection of the third-harmonic back-EMF zero-crossings. The third-harmonic back-EMF, which is not obscured, is used. In this paper, pertinent motor design considerations with regard to control using the third-harmonic back-EMF are presented. Finite element analysis and experimental results are given to verify the design optimization for the control. Experiments have verified the related theoretical analysis, design method and sensorless control strategy.

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高速无传感器永磁无刷直流电动机控制

高速永磁无刷直流电动机由于其固有的高效率和高功率密度，在许多领域得到了广泛的研究和应用。无传感器运行可以显著提高系统可靠性，减少离散传感器带来的性能变化。从系统的角度来看，在电机设计阶段通常需要考虑无传感器操作。在各种用于永磁无刷直流电机驱动的无传感器换相技术中，基于三次谐波反电动势过零检测的换相技术最为常见。然而，由于高速运行，自由旋转二极管的导通可能超过300电，这对三次谐波反电动势过零的检测没有影响。使用了不被遮挡的三次谐波反电动势。在本文中，有关的电机设计考虑到控制使用三次谐波反电动势提出。给出了有限元分析和实验结果，验证了设计优化的控制效果。实验验证了相关的理论分析、设计方法和无传感器控制策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2010 IEEE Industry Applications Society Annual Meeting

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