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Analysis of the Challenges in the Design of High Power and High Frequency Inverters

Amerian, Pourya | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54873 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Kaboli, Shahryar
  7. Abstract:
  8. Power Inverter or DC to AC voltage converter is one of the most important and widely discussed topics in the world of power electronics and systems such as DC/DC converters. Increasing the switching frequency of the inverter, in addition to its many advantages, also creates challenges that will be addressed in this dissertation. To build a high frequency yet reliable inverter, you need accurate and comprehensive information about the inverter circuitry, parasitic elements, switches and their behavior against fault conditions such as short circuit, protection requirements and etc.In this dissertation, several MOSFET transistors is shorted under various test conditions while parameters involved in current protection threshold and it’s reaction time have been investigated. Based on acquired information, a short-circuit protection system is designed and implemented for the MOSFET.An inverter with a certain structure may work well at low frequencies, but as switching frequency increase and thus the impact of parasitic elements increase, inverter malfunctions and becomes faulty.By exploiting the key inhibitory factors in the implementation of high switching frequency converters, a 100 KHz inverter with a power of 600 Watts with high rate of reliability is designed and implemented, while having no observation of fault or unidentified malfunctions.Efforts have been made to investigate topics as mentioned above, both theoretical and practical in the following chapters in detail
  9. Keywords:
  10. Inverter ; Protection ; Direct Current to Alternative Current (DC to AC) Converter ; Metal Semiconductor Field Effect Transistor (MESFET)Technology ; Shoot Through Fault ; High Frequency Inverter ; Short Circuit Current

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