PELS/IAS Seminar

Seminar | September 6 | 3-4 p.m. | 212 Cory Hall

 Jungwon Choi, University of Minnesota


Demand for miniaturization in power electronics systems has increased substantially. This trend is driven by applications such as electronic devices from consumer devices to electric vehicles that require smaller and lighter systems to improve their performance. However, efficiently reducing the size of power electronics systems is very challenging because of the limitations of today’s technologies. My research aims to develop power electronics systems that are miniaturized and efficient, and then apply these systems to a wide range of applications such as electric vehicles, robotics, medical devices, plasma generation, and renewable energy systems. Furthermore, I extend the systems to provide wireless power transfer (WPT) to eliminate manual intervention during battery charging.

In this talk, I will first discuss high-frequency resonant inverters using wide bandgap (WBG) devices to reduce the size and weight of the power conversion system and to increase efficiency. Then I will present a performance comparison between WBG devices in resonant inverters to show how they increase output power while maintaining high efficiency. In addition, I will introduce resonant converters in WPT systems for high-power applications such as electric vehicles in factories or warehouses. Finally, I will preview the direction of future works such as developing efficient high-frequency converters for emerging applications.