| Abstract |
Cuk converters, operating in Discontinuous Capacitor Voltage Mode (DCVM), can achieve unity power factor when used as rectifiers with no need of duty-cycle modulation. This operating mode causes high voltage stresses across the semiconductors, calling for high-voltage switches like IGBTs. However, zero-voltage turn-off is achieved, resulting in limited power loss even at high frequency. Both current- and voltage-fed approaches as well as constant- and variable-frequency control are analysed in the paper. Simulated and experimental results are reported, which demonstrate actual converter
performance. |
