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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Wide-band-gap devices"”.
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Investigation of new semiconductor materials for wide band-gap devices
… the compositional and optical properties of wide bandgap III-nitride and gallium oxide semiconductor materials using scanning electron microscopy techniques. The primarily used techniques used here were wavelength dispersive X-ray spectroscopy (WDX) and cathodoluminescence (CL) with other …
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Optically Controlled High Power High Speed Wide Band Gap Devices
… interest over the past few years in the areas of wide bandgap power electronics for high speed, high power and high efficiency switches which enable innovative approaches to compact pulse power system design and implementation. In the area of high speed pulse technology, optical techniques are …
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Characterization and Application of Wide-Band-Gap Devices for High Frequency Power Conversion
Advanced power semiconductor devices have consistently proven to be a major force in pushing the progressive development of power conversion technology. The emerging wide-band-gap (WBG) material based power semiconductor devices are considered as gaming changing devices which can exceed the limit …
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Toward high-efficiency high power density single-phase DC-AC and AC-DC power conversion - architecture, topology and control
… of this dissertation. The recent development of wide band-gap devices stimulates a new round of improvement on efficiency and power density of AC-DC converters. However, despite the new transistors used, the fundamental system architecture and topology remain relatively unchanged, which is …
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EMI Noise Reduction Techniques for High Frequency Power Converters
Switch mode power supplies are widely used in different applications. High efficiency and high power density are two driving forces for power supply systems. However, high dv/dt and di/dt in switch mode power supplies will cause severe EMI noise issue. In a typical front-end converter, the EMI …
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Failure Modes Analysis and Protection Design of a 7-level 22 kV DC 13.8 kV AC 1.1 MW Flying Capacitor Converter Based on 10 kV SiC MOSFET
… ratings cannot be reached by the available devices or because the system losses become excessive. To address this, two strategies can be utilized: multilevel topologies (e.g. Multilevel Modular Converter or Flying Capacitor Multilevel Converter) and high voltage switches. For medium voltage …
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Low Voltage Ride-Through for Indirect Matrix Converter Based Open-End Winding Drives
… in power systems and with the advent of wide band gap devices, which provide efficiencies greater than 95%, variable frequency drives will continue to grow and integrate into the systems. ASDs serve a varied set of processes including HVACs, oilrigs and recently many electric vehicles …