1. Department of Electrical EngineeringFederal University of Juiz de Fora (UFJF)José Lourenço Kelmer Street, s/n, São Pedro – P.O. Box 36036‐900Juiz de ForaMGBrazil
2. Department of Electrical EngineeringFederal Institute of Northern Minas Gerais (IFNMG)Dois Street, 300 – Village do Lago I – Postal Code 39404‐058Montes ClarosMGBrazil