1. School of Sciences; UASLP, Av. Chapultepec 1570, 78295 SLP Mexico
2. Engineering School, Universidad Autonoma del Carmen Calle 56 No. 4, Esq. Av. Concordia, Col Benito Juarez 24180 Cd. del Carmen; Campeche Mexico
3. Lab. of Electricity and Power Electronics; ITESI, Km 12.5 Carr. Irapuato-Silao, GTO, 36821 Mexico