Design and Analysis of Single SiC MOSFET Switch Flyback Converter based Control Power Supply for Renewable Applications

This paper presents the use of a 1700 V silicon carbide (SiC) MOSFET in a single switch configuration for a high input voltage control power supply (CPS) design in a flyback topology. Such a CPS is used to power the control and monitoring systems employed in renewable power generation, general purpose drives and uninterrupted power supply (UPS). Renewable applications often see DC bus voltages up to 1000 V. Hence, flyback topology is chosen as it provides an efficient DC voltage step-down for a wide input voltage range with low voltage ripple and desirable regulation. The performance of the flyback converter using a CoolSiC™ MOSFET is observed through appropriate simulations and verified through the hardware prototype. Further, the switching and conduction losses of the MOSFET along with system performance parameters are calculated and the results are presented in this paper.