A step-up DC-DC converter with high voltage gain and soft switched capability and minimum phase characteristic

DC-DC converters serve as essential components in advanced power electronic systems, facilitating precise and efficient energy conversion across various applications. Conventional boost configurations, while efficient, inherently introduce a right-half-plane zero in the control-to-output dynamics, resulting in non-minimum-phase behavior. This characteristic limits bandwidth and degrades transient response. To address these challenges, a novel converter topology is introduced that mitigates non-minimum-phase effects and improves overall efficiency. The proposed configuration employs a coupled inductor to transfer a portion of the input energy directly to the output. In contrast, an active switched inductor network reduces voltage and current stresses on switching devices, thereby enabling soft switching. Both active switches operate under soft-switching conditions, where all diodes are turned off softly, which reduces switching losses and enhances operational efficiency. Comprehensive steady-state analysis determines voltage gain, semiconductor stress, and power losses. Small-signal modeling establishes the control-to-output voltage transfer function. Theoretical results are validated through experimental measurements from a laboratory-scale prototype and corroborated by simulation results, confirming the effectiveness and reliability of the proposed converter.