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首页> 外文期刊>IEEE Transactions on Power Electronics >Diagnosis and Tolerance of Common Electrical Faults in T-Type Three-Level Inverters Fed Dual Three-Phase PMSM Drives
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Diagnosis and Tolerance of Common Electrical Faults in T-Type Three-Level Inverters Fed Dual Three-Phase PMSM Drives

机译：T型三电平逆变器馈电双三相PMSM驱动器中常见电气故障的诊断和容错

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摘要

In this paper, diagnosis and tolerant control schemes have been studied for common electrical faults in T-type three-level inverter fed dual-three phase permanent magnet synchronous motor (PMSM) drives for safety-critical applications. Based on vector space decomposition and double three-phase space vector modulation, diagnostic and tolerant control methods have been developed comprehensively for open-phase faults, open-switch faults, and short-switch faults inT-type three-level inverter fed dual-three-phase PMSM drives, in such way that misdiagnosis of different faults sharing similar faulty features can be avoided. In particular, a two-step diagnostic scheme is proposed in order to simplify the diagnostic process. The first step is to identify the faulty phase and fault category by analyzing current trajectories on harmonic subspace, and the second step is to determine the specific fault type in a small fault-searching area obtained from the first step. In the aspect of fault-tolerant control, a novel current compensation method is proposed for open-phase fault without changing the machine model, space vector diagram, and control framework. Open-switch faults and short-switch faults are tolerated by making full use of the remaining vectors after faults. The validity of the proposed fault diagnosis and tolerance schemes has been verified by experiments.
机译：本文针对安全关键型应用研究了针对T型三电平逆变器馈电双三相永磁同步电动机（PMSM）驱动器中常见电气故障的诊断和容错控制方案。基于矢量空间分解和双三相空间矢量调制的方法，针对T型三电平逆变器双馈三相逆变器的开相故障，开路故障和短路开关故障，全面开发了诊断和容错控制方法。相位PMSM驱动器，这样可以避免对具有相似故障特征的不同故障进行误诊。特别地，提出了两步诊断方案以简化诊断过程。第一步是通过分析谐波子空间上的电流轨迹来确定故障相和故障类别，第二步是确定从第一步获得的小故障搜索区域中的特定故障类型。在容错控制方面，提出了一种新颖的电流补偿方法，该方法在不改变电机模型，空间矢量图和控制框架的前提下，解决了缺相电流问题。通过充分利用故障后的剩余矢量，可以容忍开路开关故障和短路开关故障。实验证明了所提出的故障诊断和容错方案的有效性。

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