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Modeling and validation of a fault mitigation method in induction motor-drive systems using magnetic equivalent circuits.

机译：使用磁等效电路的感应电动机驱动系统中的故障缓解方法的建模和验证。

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摘要

In this thesis, a fault mitigation method for delta-connected induction motor-drive systems under a two-phase open-delta faulty operating condition is analyzed and verified. More specifically, this fault mitigation technique can provide a set of almost balanced motor line currents, and significantly reduce torque ripples, even when the machine runs under the aforementioned two-phase open-delta faulty operating condition. This condition is analyzed using a Magnetic Equivalent Circuit (MEC) model. This model is developed for a delta-connected induction motor which is coupled to its drive system, including the fault mitigation controller. That is, the MEC model is linked to its associated PWM inverter to include the electronic switching effects. This global motor-inverter model was simulated in a Matlab-Simulink environment, under both healthy and faulty operating conditions, while the inverter is operated in both the open-loop scalar control and closed-loop vector control modes. The results obtained from the global model are compared in this thesis to the results obtained from the corresponding Time-Stepping Finite Element (TSFE) simulation and experimental motor-drive test data. A comparative analysis of the motor performance obtained from these results, under the two-phase open-delta faulty operating case, is presented in this work. The simulation and experimental data show that the delta-connected MEC model can provide reasonably accurate results. Thus, the validity and applicability of the fault mitigation technique is thereby verified.
机译：本文分析并验证了两相开式-三角形故障条件下三角形连接的感应电动机驱动系统的故障缓解方法。更具体地，即使当电机在上述两相开三角故障操作条件下运行时，该故障缓解技术也可以提供一组几乎平衡的电机线电流，并显着降低转矩脉动。使用电磁等效电路（MEC）模型分析此条件。该模型是为连接到其驱动系统（包括故障缓解控制器）的三角形连接感应电动机开发的。也就是说，MEC模型链接到其关联的PWM逆变器以包括电子开关效果。在Matlab-Simulink环境中，在运行状况良好和故障状况下都对这种全局电动机-逆变器模型进行了仿真，而逆变器在开环标量控制和闭环矢量控制模式下均运行。本文将从全局模型获得的结果与相应的时步有限元（TSFE）模拟和实验性电机驱动测试数据获得的结果进行比较。在这项工作中，给出了在两相开式三角形故障操作情况下从这些结果获得的电动机性能的比较分析。仿真和实验数据表明，三角形连接的MEC模型可以提供合理准确的结果。因此，由此验证了故障缓解技术的有效性和适用性。

著录项

  • 作者

    Suo, Shaohua.;

  • 作者单位

    Marquette University.;

  • 授予单位 Marquette University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.S.
  • 年度 2011
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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