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A low-cost, high-efficiency PWM inverter with megahertz switching frequencyPhD 2009 - 2013 
Faculty Faculty of Built Environment and Engineering Supervisor/s Prof Gerard Ledwich, Dr Firuz Zare Thesis Abstract Magnetic components in power electronic converters generally constitute a large proportion of the cost due to the raw materials and manufacturing. Increasing the switching frequency of power electronic converters (more specifically Pulse Width Modulated (PWM) voltage sourced inverters) would be attractive for its potential to allow the use of smaller filter components, thus reducing costs. The toll for high switching frequencies, however, is decreased energy efficiency of converters.
In order to use smaller filter components, switching frequencies of the order of megahertz should be achieved. Resonant gate drive systems have been proposed where the majority of the gate drive energy is recovered into resonant capacitors. The drawback is that the complexity of the system is greatly increased and an isolated gate drive transformer is therefore required to drive each device. This project aims to:
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