Sensorless Control of IPM Motors in the Low-Speed Range and at Standstill by HF Injection and DFT Processing
Sensorless Control of IPM Motors in the Low-Speed Range and at Standstill by HF Injection and DFT Processing
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DOI：
10.1109/tia.2010.2090317
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发表时间：
2011
影响因子：
4.4
通讯作者：
S. Bolognani;S. Calligaro;R. Petrella;M. Tursini
中科院分区：
文献类型：
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作者：
S. Bolognani;S. Calligaro;R. Petrella;M. Tursini
提出了一种基于高频信号注入技术的内置式永磁同步电机无位置传感器控制器。解调过程的问题是本文的重点。提出了一种基于离散傅里叶变换和非传统参考系变换的非相干解调新方法，其中不需要关于载波相位的信息。实际上，在经典采用的相干方法中，关于载波相位的不确定性反映在解调信号幅度的不确定性中，影响观测器增益和信噪比，并且明确地提供估计器性能的劣化。分析发展的无传感器算法，包括解调技术，提供。一个完整的调查，通过仿真进行旨在显示所提出的方法的性能。最后，实验结果的基础上提出的原型电机驱动城市踏板车。
In this paper, a sensorless controller for an interior permanent-magnet synchronous motor is presented based on well-known high-frequency signal injection techniques. The issue of the demodulation process is the key point of this paper. A novel approach based on discrete Fourier transform and nonconventional reference frame transformation is presented, allowing a simple and robust noncoherent demodulation, i.e., in which no information about the carrier phase is needed. In the classically adopted coherent approaches, in fact, uncertainty about carrier phase reflects in uncertainty in the demodulated signal amplitude, affecting observer gains and signal-to-noise ratio and definitively providing a degradation of the performance of the estimator. Analytical development of the sensorless algorithm, including the demodulation technique, is provided. A complete investigation by simulation is carried out aiming at showing the performance of the proposed method. Finally, experimental results are presented based on a prototype motor drive for city scooters.