Research of efficient DC-DC converter based on SiC power devices and ZVS soft switches

General DC-DC converters turn on or off in condition of over-voltage or over-current, resulting in high loss in the switching process. In order to reduce switching losses, our research is focused on the application of SiC power diode in high frequency Boost DC-DC converter, adding ZVS quasi-resonant soft switching circuits. SiC devices have wide band gap, high withstand voltage, low on resistance and leakage current, and better reverse recovery characteristic, and soft switching circuits can further reduce switching loss. We used PSpice software to simulate and test the switching waveforms of switching devices. Finally, we built the actual 2.5kW Boost converter circuits for testing, verifying the improvement of properties of the DC-DC converter based on SiC power devices and ZVS soft-switching technology.