Plamen Proynov received the B.Sc. (2005) and M.Sc. (2008) degrees in automation and control engineering from the University of Varna, Bulgaria. In 2010 he joined the Electrical Energy and Management Group at the University of Bristol as a PhD student. His research focused on kinetic energy harvesting and renewable micro-power sources. From February 2014 he is a research assistant in energy management, harvesting, and wireless power transfer with the Department of Electrical Engineering in the University of Bristol. Within WP4 of the SPHERE project he will be investigating RF power transfer for domestic medical applications. His research interests include low-power power electronic design for energy harvesting and low-power control strategies.