Pulse Frequency Modulated Three-Phase Interleaved Boost-Integrated LC Series Resonant Converter

This paper proposes a pulse frequency modulated three-phase interleaved boost integrated LC series resonant converter, which consists of the boost-integrated unit and the LC series resonant unit. By changing the switching frequency, the output voltage can be controlled as a constant value under different input voltages. In a wide switching frequency range, the transformer design is dependent on the fixed LC series resonant frequency rather than the variable switching frequency. Moreover, the zero voltage switching of all switches can be guaranteed. The working characteristics of the proposed converter are presented in detail and well verified by the simulation results.