TY - GEN
T1 - Integrated Current Balancing Transformer Based Input-Parallel Output-Parallel LLC Resonant Converter Modules
AU - Ahmad, Ubaid
AU - Cha, Honnyong
AU - Naseem, Nabeel
AU - Do, Duc Tuan
N1 - Publisher Copyright:
© 2019 The Korean Institute of Power Electronics (KIPE).
PY - 2019/5
Y1 - 2019/5
N2 - Input-parallel output-parallel (IPOP) connected converter system allows the use of low power converter modules for high power applications. In this paper, a reliable integrated current balancing transformer (ICBT) is proposed for the current balancing requirement of IPOP LLC resonant converter modules. The proposed ICBT based IPOP LLC resonant converter modules ensures both input current sharing (ICS) and output current sharing (OCS) in constituent modules, without dedicated controller. The proposed ICBT is basically the resonant inductors of LLC resonant converter modules, coupled to perform the function of current balancing, and also have enough leakage inductance for resonance operation simultaneously. Moreover, the proposed ICBT can significantly reduce the overall magnetic volume, and increase the power density of IPOP LLC resonant converter modules. Magnetic and electrical models of the proposed ICBT have been presented in this paper. To validate the performance of the proposed ICBT based IPOP LLC resonant converter modules, a 2.5 kW hardware prototype has been designed, fabricated and tested successfully.
AB - Input-parallel output-parallel (IPOP) connected converter system allows the use of low power converter modules for high power applications. In this paper, a reliable integrated current balancing transformer (ICBT) is proposed for the current balancing requirement of IPOP LLC resonant converter modules. The proposed ICBT based IPOP LLC resonant converter modules ensures both input current sharing (ICS) and output current sharing (OCS) in constituent modules, without dedicated controller. The proposed ICBT is basically the resonant inductors of LLC resonant converter modules, coupled to perform the function of current balancing, and also have enough leakage inductance for resonance operation simultaneously. Moreover, the proposed ICBT can significantly reduce the overall magnetic volume, and increase the power density of IPOP LLC resonant converter modules. Magnetic and electrical models of the proposed ICBT have been presented in this paper. To validate the performance of the proposed ICBT based IPOP LLC resonant converter modules, a 2.5 kW hardware prototype has been designed, fabricated and tested successfully.
KW - Current balancing transformer
KW - Input current sharing
KW - IPOP LLC converter modules
KW - Magnetic integration
KW - Output current sharing
UR - http://www.scopus.com/inward/record.url?scp=85071605788&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85071605788
T3 - ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia
SP - 1133
EP - 1140
BT - ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia
Y2 - 27 May 2019 through 30 May 2019
ER -