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Ohio State power electronics team earns a win in Beijing

The race toward powering the homes and the cities of the future is underway, and students at The Ohio State University are helping to lead the efforts.

Electrical and Computer Engineering Professor Jin Wang, of the Center for High Performance Power Electronics (CHPPE) at Ohio State, saw his team of students recently earn the "Outstanding Presentation Award" at the 2018 IEEE International Future Energy Challenge in Beijing, China this July for their work in next-generation residential energy storage systems. The competition took place at Tsinghua University.

Wang said Ohio State's second generation 1 kW 400 V to 40 V bi-directional DC/DC converter achieved 91.5% efficiency at the peak power.

"The circuit features a quasi-switched capacitor high voltage end, which reduces the voltage stress of GaN devices to 267 V and enables full range soft-switching with simple phase shift control," Wang said. 

Unexpected control signal glitches botched the team's final test results demonstrating the reverse power flow, he said, but their presentation of the work earned them praise.

IFEC is an international student competition for innovation, conservation, and effective use of electrical energy, which is open to college and university student teams from recognized engineering programs around the world.

The competition is sponsored by the Institute of Electrical and Electronics Engineers (IEEE) Power Electronics Society (PELS), Power & Energy Society (PES), Industry Application Society (IAS) and Power Sources Manufacturers Association (PSMA). 

The specific goal of IFEC 2018 was to develop a high-efficiency high power density isolated bidirectional DC-DC converter for residential energy storage systems. Teams submitted their proposals in 2017, and Ohio State won acceptance into the event and placed into the finals in April.