This work presents a static bidirectional step-down or step-up converter using the four-state switching cell. This four-state switching cell is composed by six controlled switches, six diodes and a coupled inductor. The converter using this cell works in three distinct regions as changing the duty cycle. The converter is analyzed in continuous conduction… (More)
The present study reports early findings on freshman's perceptions in Electrical/Electronic Engineering courses from four higher education institutions: two Portuguese (Instituto Superior de Engenharia do Porto, ISEP, and Universidade do Minho, UM) and two Brazilian (Instituto Federal de Santa Catarina, IFSC, and Universidade Regional de Blumenau, FURB).