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Sneak Circuit Identification of an Improved Boost Converter With Soft-Switching Realization

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Soft-switching techniques are well leveraged in power converters to improve efficiency, and disturbance or variation caused by parasitic parameters, however, this leads to undesired circuit paths (named sneak circuits), which… Click to show full abstract

Soft-switching techniques are well leveraged in power converters to improve efficiency, and disturbance or variation caused by parasitic parameters, however, this leads to undesired circuit paths (named sneak circuits), which may bypass the soft-switching path and may even incur terrible accidents. Therefore, it is of great significance to identify the sneak circuits and well design the soft-switching converters to avoid this issue. Based on the sneak circuit theory, this paper identifies the safe working range of a new designed boost converter with high-efficiency and high-voltage gain. For the proposed novel converter, only a small network is utilized to realize zero-current switching, zero-voltage transition, and zero-current transition functions for all of its switches. Detailed analyses and comparison between the proposed converter and the traditional one are demonstrated to reveal the proposed one’s unique features. For the sneak circuit identifications, the efficiency involving practical parasitic parameters is deduced and analyzed for industrial applications based on sneak circuit. Finally, simulation results and experimental prototype are addressed to validate its effectiveness.

Keywords: circuit identification; sneak circuit; identification improved; boost converter; circuit; soft switching

Journal Title: IEEE Journal of Emerging and Selected Topics in Power Electronics
Year Published: 2019

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