Variable frequency control three-phase PFC full range ZVS dead time design

Compared with PWM control, the advantages of three-phase dual-switch Boost PFC under frequency conversion control are that soft switching can be realized and the switching loss can be reduced. In order to ensure the soft switching, it is necessary to set the dead time between two switches properly. In this paper, many factors affecting the design of dead time are considered, and a feasible calculation method is proposed, which is verified by simulation and experiment.