A Novel Efficient Tri-State Boost Converter

The paper proposes a novel efficient tri-state boost converter. It introduces a state of zero inductor voltage to reduce the inductor charging and discharging time. Then, the core loss is reduced due to reducing the inductor ripple current. In addition, by adding the auxiliary inductor, the current of the freewheeling diode naturally drops to zero, which eliminates the reverse recovery loss. Thus, the proposed converter achieves a higher efficiency and faster dynamic response (absence of right-half-plane zero) compared with the classical boost converter. First, the structure and operation principle of the proposed converter is presented in detail. Then, the main losses of the converter are analyzed. Finally, simulation and experimental results prove the effectiveness of the theoretical analysis.