A New Transformerless Buck-Boost Converter With Positive Output Voltage

A new transformerless buck–boost converterwith simple structure is proposed in this study. Comparedwith the traditional buck–boost converter, the proposedbuck–boost converter’s voltage gain is squared times of theformer’s and its output voltage polarity is positive. Theseadvantages enable it to work in a wider range of positiveoutput. The two power switches of the proposed buck–boost converter operate synchronously. In the continuousconduction mode (CCM), two inductors are magnetized andtwo capacitors are discharged during the switch-on period,while two inductors are demagnetized and two capacitorsare charged during the switch-off period. The power electronicssimulator (PSIM) and the circuit experiments are providedto validate the effectiveness of the proposed buck–boostconverter.