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首页> 外文期刊>Industrial Electronics, IEEE Transactions on >A Modified Sensorless Control Scheme for Interior Permanent Magnet Synchronous Motor Over Zero to Rated Speed Range Using Current Derivative Measurements
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A Modified Sensorless Control Scheme for Interior Permanent Magnet Synchronous Motor Over Zero to Rated Speed Range Using Current Derivative Measurements

机译：使用电流导数测量的零速至额定速度范围内的内部永磁同步电动机的改进的无传感器控制方案

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摘要

This paper proposes a modified sensorless control technique for an interior permanent magnet synchronous motor over its full-speed range based on current derivative measurements and fundamental pulsewidth modulation excitation (FPE). The proposed method employs measurement of the current derivative at only one active-voltage vector at low speeds, and at one active-voltage vector and one zero-voltage vector at medium and high speeds during each pulsewidth modulation (PWM) cycle, in contrast to two active- and two zero-voltage vectors in the conventional FPE method. The theoretical analysis is developed based on the three-phase model of the machine. The rotor position and speed are estimated at PWM frequency. In addition, the selection voltage vectors for current derivative measurement as well as the pulse stretching scheme for extending and compensating the selected voltage vectors is proposed in order to improve the accuracy of the current derivative measurement and to minimize the current distortion. The experimental results show that the proposed method results in a considerable improvement of the estimation accuracy at low speeds, a significant reduction of current distortion compared to the conventional FPE method and a full-speed range operation from no load to full load.
机译：本文基于电流导数测量和基波脉宽调制激励（FPE），提出了一种改进的用于室内永磁同步电动机全速范围的无传感器控制技术。与每个脉冲宽度调制（PWM）周期相比，所提出的方法仅在低速下仅在一个有效电压矢量处以及在中速和高速下在一个有效电压矢量和一个零电压矢量处测量电流导数。传统FPE方法中有两个有功和两个零电压矢量。基于机器的三相模型进行理论分析。转子位置和速度以PWM频率估算。另外，提出了用于电流导数测量的选择电压矢量以及用于扩展和补偿所选择的电压矢量的脉冲展宽方案，以提高电流导数测量的精度并最小化电流失真。实验结果表明，与传统的FPE方法相比，该方法可显着提高低速时的估计精度，显着降低电流失真，并实现从空载到满载的全速范围操作。

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