PAULO PEIXOTO PRAÇA (Senior Member, IEEE) received the B.Sc. degree in electronic engineering from the Universidade de Fortaleza, Fortaleza, Brazil, in 2003, and the M.Sc. and Ph.D. degrees in electrical engineering from the Federal University of Ceará, Fortaleza, Brazil, in 2006 and 2011, respectively. Since 2009, he has been a Professor with the Federal University of Ceará. His research interests include renewable energy, ac–dc power converters, battery chargers, UPS systems, and digital control