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首页> 外文期刊>Trends in Ecology & Evolution >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型三级逆变器中常见电气故障的诊断和耐受双三相PMSM驱动器

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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：在本文中，研究了T型三级逆变器FED双三相永磁体同步电机（PMSM）驱动器的常见电气故障进行了诊断和耐用控制方案，用于安全关键应用。基于向量空间分解和双三相空间矢量调制，已经全面开发了诊断和耐受控制方法，用于开放式故障，开关故障，短开关故障int型三级逆变器馈线双三级-PHASE PMSM驱动器，可以避免不同故障的误诊，可以避免共享类似的错误特征。特别地，提出了一种两步诊断方案，以简化诊断过程。第一步是通过分析谐波子空间上的当前轨迹来识别故障阶段和故障类别，第二步是在从第一步获得的小故障搜索区域中确定特定的故障类型。在容错控制的方面，提出了一种新的电流补偿方法，用于开放相位故障而不改变机器模型，空间矢量图和控制框架。通过在故障后充分利用剩余的向量，可以容忍开关故障和短开关故障。通过实验验证了所提出的故障诊断和公差方案的有效性。

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