TY - GEN
T1 - Efficient and Parameter Robust Phase-Shift-Modulation Strategy for LCR-DAB Converter
AU - Lee, Jaehong
AU - Kim, Hyunseob
AU - Kim, Dong Uk
AU - Cui, Kehan
AU - Kim, Sungmin
AU - Lee, Seung Hwan
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Loosely-coupled-resonant dual-active-bridge (LCR-DAB) converter substitutes a high-frequency (HF) transformer for inductive power transfer (IPT) coils. An air gap between the IPT coils is advantageous in achieving high-voltage isolation, the key technical barrier of medium-voltage (MV) solid-state-transformer (SST) systems. Owing to weak magnetic coupling between IPT coils, the LCR-DAB converter requires resonant compensations. This makes the LCR-DAB converter unique characteristics compared to conventional transformer-coupled DAB converters. Conventional modulation strategies should be revisited for the LCR-DAB converter. In this paper, the well-known phase-shift modulation (PSM) is investigated for LCR-DAB converters. Input impedance, output power, and efficiency of the LCR-DAB converter are analyzed with respect to operating frequency and phase-shift angle. Based on the analysis, an efficient and parameter-robust PSM strategy for LCR-DAB converters is proposed. In addition, a novel MV-isolated coil design for the LCR-DAB converter is presented. The proposed modulation strategy was evaluated by PLECS simulation results.
AB - Loosely-coupled-resonant dual-active-bridge (LCR-DAB) converter substitutes a high-frequency (HF) transformer for inductive power transfer (IPT) coils. An air gap between the IPT coils is advantageous in achieving high-voltage isolation, the key technical barrier of medium-voltage (MV) solid-state-transformer (SST) systems. Owing to weak magnetic coupling between IPT coils, the LCR-DAB converter requires resonant compensations. This makes the LCR-DAB converter unique characteristics compared to conventional transformer-coupled DAB converters. Conventional modulation strategies should be revisited for the LCR-DAB converter. In this paper, the well-known phase-shift modulation (PSM) is investigated for LCR-DAB converters. Input impedance, output power, and efficiency of the LCR-DAB converter are analyzed with respect to operating frequency and phase-shift angle. Based on the analysis, an efficient and parameter-robust PSM strategy for LCR-DAB converters is proposed. In addition, a novel MV-isolated coil design for the LCR-DAB converter is presented. The proposed modulation strategy was evaluated by PLECS simulation results.
KW - LCR-DAB converter
KW - Phase shift modulation
KW - inductive power transfer
KW - insulation
UR - http://www.scopus.com/inward/record.url?scp=85182951730&partnerID=8YFLogxK
U2 - 10.1109/ECCE53617.2023.10362148
DO - 10.1109/ECCE53617.2023.10362148
M3 - Conference contribution
AN - SCOPUS:85182951730
T3 - 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023
SP - 899
EP - 904
BT - 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023
Y2 - 29 October 2023 through 2 November 2023
ER -
