A novel interleaved nonisolated high gain DC–DC boost converter based on voltage multiplier rectifier

This article proposes an interleaved DC-DC boost architecture with a voltage multiplier rectifier circuit to achieve superior performance. The design methodology and operational characteristics of the converter are examined for two defined duty cycle intervals: Area 1 (0 < D < 1) and Area 2 (0.5 ≤ D < 1). With its flexible functionality, the converter proves suitable for a wide range of applications, including energy storage platforms, electric transportation, and renewable energy technologies. The suggested converter has two essential levels: an interleaved boost level and a voltage multiplier rectifier (VMR) circuit. The interleaved boost level functions as a two-phase boost converter, converting the input DC voltage into a high-frequency AC square wave to enable efficient filtering with small capacitors. The VMR phase then converts the AC waveform to produce a high DC output voltage. The proposed converter delivers high voltage gain with reduced input ripple through interleaved operation, which improves electromagnetic interference (EMI) performance and extends the source's lifespan. Its transformerless design, combined with a voltage multiplier, minimizes both size and cost while maintaining high efficiency. Additionally, the low stress on switches allows for the use of more affordable components, making it an ideal solution for renewable energy and DC microgrid applications. This study examines the operational states of the converter, its steady-state behavior, Voltage gain characteristics across idealized and non-ideal conditions, power losses, and efficiency metrics. Under 100 W output power conditions, the suggested converter demonstrates a maximum efficiency of 96%. To validate the accuracy of the theoretical analysis and simulation results, the converter is subjected to simulations for a voltage conversion from 25 V to 270.5 V, which leads to the development of a laboratory prototype for empirical validation. The results of the simulation and experimental tests confirm the accuracy and reliability of the suggested interleaved boost converter's performance.