1. Graduate Program in Electrical Engineering – Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte, 31270-901, MG, Brazil
2. Department of Electrical Engineering, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
3. Polytechnic Institute, Una Center University, Belo Horizonte, MG, Brazil