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首页> 外文期刊>Industrial Electronics, IEEE Transactions on >Detection and Isolation of Speed-, DC-Link Voltage-, and Current-Sensor Faults Based on an Adaptive Observer in Induction-Motor Drives
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Detection and Isolation of Speed-, DC-Link Voltage-, and Current-Sensor Faults Based on an Adaptive Observer in Induction-Motor Drives

机译：基于自适应观测器的感应电动机驱动器速度，直流母线电压和电流传感器故障的检测和隔离

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摘要

A sensor fault detection and isolation unit is considered for induction-motor drives based on an adaptive observer with rotor-resistance estimation. Generally, closed-loop induction-motor drives with voltage-source inverters use a speed or position, a dc-link voltage, and two or three phase-current sensors. In the proposed fault-detection and isolation unit, the estimated phase currents and rotor resistance are sent to a decision-making unit, which identifies the faulty sensor type based on a deterministic rule base. In the case of a current-sensor failure, it also detects the phase with erroneous sensor output. It is shown that, unlike the other proposed model-based fault-tolerant systems, using a bank of observers is not necessary, and only one current observer with rotor-resistance estimation is sufficient for isolation of all sensors' faults. The accuracy of the proposed approach is analytically proved. Furthermore, extensive simulation and experimental tests verify the effectiveness of the proposed method at different operating conditions.
机译：考虑了基于带有转子电阻估计的自适应观测器的感应电机驱动传感器故障检测和隔离单元。通常，带有电压源逆变器的闭环感应电动机驱动器使用速度或位置，直流母线电压以及两个或三个相电流传感器。在所提出的故障检测和隔离单元中，将估计的相电流和转子电阻发送到决策单元，该决策单元根据确定性规则库确定故障传感器的类型。在电流传感器发生故障的情况下，它还会检测传感器输出错误的相位。结果表明，与其他提议的基于模型的容错系统不同，不需要使用一组观察器，并且只有一个具有转子电阻估计值的当前观察器足以隔离所有传感器的故障。通过分析证明了该方法的准确性。此外，大量的仿真和实验测试证明了该方法在不同操作条件下的有效性。

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