Autors: Hinov, N. L., Grigorova, T. G.
Title: A Comprehensive Analysis of Losses and Efficiency in a Buck ZCS Quasi-Resonant DC/DC Converter
Keywords: buck DC/DC converters, efficiency, energy losses, quasi-resonant converters (QRCs), reliability, simulation modeling, zero-current switching (ZCS)

Abstract: As power electronics continue to advance, the demand for highly efficient and low-loss DC/DC converters has grown significantly. This article comprehensively analyses ZCS quasi-resonant switch cell losses and efficiency in buck L-type zero-current switching (ZCS) quasi-resonant DC/DC converters. The main part of the study includes a comparative analysis of conduction losses in semiconductor switches of conventional PWM buck converters and zero-current switching (ZCS) quasi-resonant buck converters (L-type), utilizing both specific and generalized design equations. Novel coefficients are introduced that enable the evaluation of static power losses in the classical buck converter compared to those in L-type ZCS buck quasi-resonant converters under identical conditions. The article also discusses design considerations aimed at minimizing static losses. An L-type half-mode zero-current switching (ZCS) buck quasi-resonant DC/DC converter (QRC) is implemented to verify the analytical results. Various simulations were conducted using PSpice in the Texas Instruments simulation environment, along with experimental studies at different switching frequencies and load conditions. The proposed methodology integrates both analytical and simulation approaches to analyze energy losses and key parameters influencing the converter’s efficiency. The obtained results show that the relative error between the analytical, simulation, and experimental results is below 5%.

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Issue

Journal of Low Power Electronics and Applications, vol. 15, 2025, Switzerland, https://doi.org/10.3390/jlpea15020034

Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus и Web of Science