Full-load range zero-voltage zero-current soft-switching inverter arc welding power supply

Depending on the research and classification of typical full-bridge soft-switching power converters, a full-load range zero-voltage zero-current soft-switching full-bridge power converter topology with auxiliary resonant network was put forward, designed and analyzed.By using dead time adaptive regulated phase-shift-control method, which makes the dead time conjugate with the resonance processes affected by the circuit energy, the full-load range zero-voltage turn-on and proximate zero-voltage soft turn-off with effective results are realized for the power devices of converter's lead leg.At the same time, aimed at the problem of soft turn-on and soft turn-off being difficult to be compatible in the full-load range for the power devices of converter's lag leg, a realizing method of soft-switching is proposed, which makes the zero-voltage and zero-current technology combined together.Through the cooperative function of various auxiliary measures, the full-load range zero-voltage turn-on, and soft turn-off combined zero-voltage with zero-current are realized for the power devices of converter's lag leg.