Investigation of Efficiency and Thermal Performance of the Y-source Converters for a Wide Voltage Range

The Y-source topology has a unique advantage of having high voltages gain with small shoot through duty cycles. Furthermore, having the advantage of high modulation index increases the power density and improves the performance of the converter. In this paper, a collective thermal and efficiency investigation is performed in order to improve the reliability of the converter. Losses evaluation in the semiconductor devices (switching/conduction), the capacitors (ESR), and the inductors (core/winding) are presented. Moreover, the junction temperature evaluation of the devices is considered under 25◦ C ambient temperature. The analysis is carried out at the following voltages gain (2, 3, and 4), and at the following winding factors (4, and 5) using PLECS toolbox. The results show that, the power losses and the junction temperature are directly proportional with the voltage gain and the winding factor.