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Optical intensity modulated gate control of power-electronic system performance parameters.

机译：功率电子系统性能参数的光强度调制门控制。

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摘要

In a power-electronics system (PES), switching dynamics of the power semiconductor devices (PSDs) may strongly influence some key system-level performance parameters - specifically, power-conversion efficiency, electromagnetic noise emission, and dv/dt and di/dt related PSD stress. Aim of the this Dissertation research is to achieve PSD switching-dynamics modulation along with optical isolation in a unified scheme, which enhances immunity to external electromagnetic noise and provides galvanic isolation between the high-power, high-voltage power stage and the low-voltage control electronics, in addition to achieving dynamic control of the system-level performance parameters.;Fundamentally, slowing down the switching transition speed of the PSD by modulating the optical-intensity would reduce the electromagnetic noise by reducing the rate of change of voltage and current but it may also lead to an increment of switching loss and degrade the power-conversion efficiency. Principal research challenges in this Dissertation are, therefore, determination of the optical-intensity level, which yields an optimal balance among efficiency and PSD stress and synthesis of a mechanism for experimental validation.;A GaAs-based optical-triggering device is designed and fabricated for realizing switching dynamics modulation using light. Modeling and characterization of the dynamics of the optical-triggering device is done. Various types of PSD are coupled with the optical-triggering device and modulation in their switching parameters with variation in optical intensity is analyzed and experimentally characterized. Finally, some key power-electronic system performance parameters such as power-conversion efficiency, PSD dv/dt and di/dt stress, and electromagnetic noise emission are experimentally shown to be modulated by optical intensity variation using such optically-controlled PSD in a prototype power converter. An optimal optical-intensity level is also experimentally determined which yields a balanced trade-off between mutually opposing trends of power-conversion efficiency improvement and PSD stress mitigation.
机译：在功率电子系统（PES）中，功率半导体器件（PSD）的开关动力学可能会严重影响某些关键的系统级性能参数-特别是功率转换效率，电磁噪声发射以及dv / dt和di / dt相关的PSD压力。本论文研究的目的是在一个统一的方案中实现PSD开关动态调制和光隔离，以增强对外部电磁噪声的抵抗力，并在大功率，高压功率级和低压之间提供电流隔离。控制电子器件，除了实现对系统级性能参数的动态控制外，从根本上说，通过调制光强度来减慢PSD的开关转换速度，还可以通过减小电压和电流的变化率来降低电磁噪声。但是它也可能导致开关损耗的增加并降低电源转换效率。因此，本论文的主要研究挑战是确定光强度水平，从而在效率和PSD应力之间取得最佳平衡，并综合了用于实验验证的机制。；设计和制造了一种基于GaAs的光触发装置用于利用光实现开关动态调制。完成了光触发设备动力学的建模和表征。各种类型的PSD与光触发设备耦合，并分析和实验表征了其开关参数随光强度的变化而进行的调制。最后，在原型中，通过使用这种光控PSD通过光强度变化调制了一些关键的电力电子系统性能参数，例如功率转换效率，PSD dv / dt和di / dt应力以及电磁噪声发射。电源转换器。还通过实验确定了最佳光强度水平，该最佳光强度水平在功率转换效率提高和PSD应力缓解的相互相反的趋势之间产生了平衡的权衡。

著录项

  • 作者

    Sarkar, Tirthajyoti.;

  • 作者单位

    University of Illinois at Chicago.;

  • 授予单位 University of Illinois at Chicago.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 150 p.
  • 总页数 150
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

  • 入库时间 2022-08-17 11:38:28

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