Development of a Bidirectional DC–DC Converter with Rapid Energy Bidirectional Transition Technology

Hsuan Liao, Yi-Tsung Chen, Linda Chen and Jiann-Fuh Chen
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Hsuan Liao: Department of Electrical and Electronics Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Yi-Tsung Chen: Department of Electrical and Electronics Engineering, National Cheng Kung University, Tainan City 701, Taiwan
Linda Chen: Department of Electrical and Computer Engineering, University of Canterbury, Christchurch 8041, New Zealand
Jiann-Fuh Chen: Department of Electrical and Electronics Engineering, National Cheng Kung University, Tainan City 701, Taiwan

Energies, 2022, vol. 15, issue 13, 1-19

Abstract: Bidirectional DC–DC converters are key devices in the DC distribution system and the energy storage system (ESS). It is important to consider the safety of the elements in the converter for rapid conversion of the power direction. Damages may occur to the power-related components in the circuit if the direction of the inductor current or the capacitor voltage changes instantaneously. To make the power flow change smoothly and quickly, this research proposed a bidirectional DC–DC converter with rapid energy transition technology implemented in the circuit architecture. The rapid energy bidirectional transition technology added a resonance path based on the LC resonant circuit, allowing rapid energy conversion through the resonance path. Therefore, the energy in the energy storage element could be quickly converted without causing circuit surges. Analyses of the converter operating in the step-up mode, the step-down mode, and the transition operation mode are presented. The proposed circuit architecture had a high voltage-conversion ratio and a simple architecture. A prototype bidirectional DC–DC converter with a full load of 500 W, a low side voltage of 24 V, and a high side voltage of 200 V was developed to prove the concept. The feasibility of the rapid energy bidirectional transition technology was verified by the simulation results and experimental results using the prototype converter. The maximum efficiencies in the step-up mode and the step-down mode were 95.3% and 93.8% respectively. Under full-load conditions, the transient time of the energy transition from the step-up mode to the step-down mode was 17.7 μs, and the transient time of the energy transition from the step-down mode to the step-up mode was 19.3 μs.

Keywords: bidirectional DC–DC converter; energy transition; commutation interval; energy storage system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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