High-efficiency power electronics for energy conversion
In his work, Mansour designed a new switching converter topology that implements partial power processing with four voltage levels. To achieve this, he combined power semiconductor devices made of gallium nitride (GaN) with conventional silicon transistors. Based on his circuit concept, Mansour realized a demonstrator that achieved a measured efficiency of 99.66% when charging capacitive loads. The concrete approach can theoretically reduce electrical losses to one-third. Experimentally, more than a halving of losses was demonstrated, thereby verifying the approach. For novel solid-state electrocaloric heat pumps, this enables a significant increase in the system-level coefficient of performance. Thus, to pump a certain heat energy, noticeably less electrical energy has to be used.
Further fields of application for the circuit concept are in electromobility (traction converters), solar energy technology (photovoltaic inverters), or data centers (cooling technology).