Multimode Predictive ZVS Control With Phase‐Shifted PWM for Three‐Level Flying Capacitor Totem‐Pole PFC Rectifier

The flying capacitor multilevel (FCML) totem‐pole power‐factor‐correction (PFC) rectifier is a prom ising topology for high power density. However, realizing triangular current mode for zero‐voltage switching (ZVS) is challenging because of its intricate multistep resonant commutations. This work presents a predictive ZVS control strategy combined with phase‐shifted pulse‐width modulation for the three‐level FCML totem‐pole PFC. A novel state‐plane analytical model is constructed in the physical voltage–current plane to capture the multistep FCML resonance across the full duty‐cycle range, and a dedicated two‐level transition interval is introduced to smoothly bridge the D > 0.5 and D < 0.5 operating regions. On this basis, the synchronous rectifier turn‐off current is regulated to guarantee full‐cycle ZVS over the entire 230 VAC line cycle and the full load range while capping the maximum switching frequency. A theoretical loss analysis confirms the elimination of parasitic capacitance discharge losses, yielding an estimated peak efficiency of 99.40% at 75% load. Hardware‐in‐the‐loop experiments using an OPAL‐RT simulator verify the effectiveness of the proposed strategy, confirming full‐cycle ZVS and a measured full‐load input current total harmonic distortion of 4.68%, fully conforming with the OCP Diablo 400 specification.