Full-bridge three-level LLC resonant converter based on hybrid control strategy

Abstract

The invention relates to the technical field of resonant converters, in particular to a full-bridge three-level LLC resonant converter based on a hybrid control strategy. The device comprises a switch module, an output module and a control module. According to the invention, a hybrid control strategy combining PFM and PWM is adopted, and a double-closed-loop control strategy is adopted, so that the peak value of resonance current can be effectively limited, rapid response and accurate control are realized, transient response and steady-state errors in the circuit are suppressed, soft switching of the full-bridge three-level LLC resonant converter in a full-load range is realized, and the gain range is widened.

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