Triple-Mode Wide-Input Range Resonant DC-DC Converter With Extended Asymmetric Modulation

This article proposes a triple-mode resonant converter operating over a wide input voltage range for renewable energy harvesting applications. The proposed converter operates in a pure series resonant mode with a nominal input voltage, an asymmetric resonant boost mode with a low-input voltage, and...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2023-06, Vol.38 (6), p.1-12
Main Authors: Kim, Sangoh, Cho, Junseong, Kim, Jong-Woo, Kim, Minsung, Han, Byeongcheol
Format: Article
Language:English
Subjects:
Asymmetric modulation
Asymmetry
buck-boost converter
Capacitors
Electric bridges
Energy conversion efficiency
Energy harvesting
High-voltage techniques
isolated resonant converter
Modulation
Pulse duration
renewable energy
Resonant converters
RLC circuits
soft-switching
Switches
Transformers
Voltage
Voltage converters (DC to DC)
Voltage doublers
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Summary:This article proposes a triple-mode resonant converter operating over a wide input voltage range for renewable energy harvesting applications. The proposed converter operates in a pure series resonant mode with a nominal input voltage, an asymmetric resonant boost mode with a low-input voltage, and an asymmetric pulse-width-modulation series resonant buck mode with a high-input voltage. This converter adopts an asymmetric half-bridge-type voltage-doubler to reduce the transformer turns ratio and number of active components. Moreover, its extended asymmetric modulation reduces hard switching turn-ON losses compared to conventional symmetric modulations. Consequently, the proposed converter attains high power conversion efficiency and power density over a wide input voltage range. The operating principles and steady-state analysis are presented in detail herein. Finally, a 300-W/380-V prototype is presented to validate the feasibility of the proposed converter over an input voltage range of 30-60 V.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2023.3245622