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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Virtual Current Sensor in the Fault-Tolerant Field-Oriented Control Structure of an Induction Motor Drive
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Virtual Current Sensor in the Fault-Tolerant Field-Oriented Control Structure of an Induction Motor Drive

机译：虚拟电流传感器在感应电动机驱动器的容错磁场定向控制结构中

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摘要

Designing electrical drives resistant to the failures of chosen sensors has recently become increasingly popular due to the possibility of their use in fault-tolerant control (FTC) systems including drives for electric vehicles. In this article, a virtual current sensor (VCS) based on an algorithmic method for the reconstruction of the induction motor (IM) phase currents after current sensor faults was proposed. This stator current estimator is based only on the measurements of the DC-bus voltage in the intermediate circuit of the voltage-source inverter (VSI) and a rotor speed. This proposal is dedicated to fault-tolerant vector controlled IM drives, where it is necessary to switch to scalar control as a result of damage to the current sensors. The proposed VCS allows further uninterrupted operation of the direct rotor-field oriented control (DRFOC) of the induction motor drive. The stator current estimator has been presented in the form of equations, enabling its practical implementation in a microprocessor system. Simulation studies of the proposed algorithm in an open and closed-loop DRFOC structure are presented under different operation conditions of the drive system. The experimental verification of the proposed method is also presented and the accuracy of the stator current estimation algorithm is analyzed under various operating conditions of the drive system.
机译：由于可以在包括电动车辆驱动器在内的容错控制（FTC）系统中使用这些驱动器，因此设计能够抵抗所选传感器故障的电气驱动器最近变得越来越流行。本文提出了一种基于算法的虚拟电流传感器（VCS），用于在电流传感器故障后重建感应电动机（IM）的相电流。该定子电流估算器仅基于电压源逆变器（VSI）中间电路中的直流母线电压和转子速度的测量值。该建议专用于容错矢量控制的IM驱动器，由于电流传感器的损坏，有必要切换到标量控制。所提出的VCS允许感应电动机驱动器的直接转子磁场定向控制（DRFOC）进行进一步的不间断运行。定子电流估算器已经以等式的形式给出，从而使其可以在微处理器系统中实际实现。在驱动系统的不同运行条件下，对所提出的算法在开环和闭环DRFOC结构中进行了仿真研究。还提出了该方法的实验验证，并分析了驱动系统在各种工况下定子电流估计算法的准确性。

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