TY - JOUR
T1 - An Interleaved Bidirectional Coupled-Inductor Based DC-DC Converter with High Conversion Ratio for Energy Storage System
AU - Hu, Renjun
AU - Yan, Zhixing
AU - Wang, Lei
AU - Wong, Man Chung
AU - Zeng, Jun
AU - Liu, Junfeng
AU - Hu, Bihua
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - In this article, an interleaved coupled-inductor (CI) based bidirectional dc-dc converter (BDC) is proposed with a higher voltage conversion ratio (VCR). In this proposed interleave CI-based BDC (ICI-BDC), the CIs can operate as both a filter inductor and a transformer simultaneously, so that the power density is improved. Moreover, as a transformer, the turns ratio of CIs is used to improve the VCR with a voltage stress reduction purpose. Furthermore, the interleaved technique can well achieve the low current ripple and reduced current stress in this topology. To control ICI-BDC, the pulsewidth modulation plus phase-shift (PPS) control is employed, where the duty cycle is used to match the two side voltages, and the phase-shift angle is used to control the amount and direction of power flow. Uniquely, a difference value is set between the two side duty cycles, and the duty cycle of the high voltage side is smaller than that of the low voltage side by a fixed value. In this proposed control method, all the switches can achieve soft-switching even at light load condition, which can improve transmission efficiency. Experimental results obtained from a 1-kW prototype show a nearly high efficiency under all loading conditions, validating the viability of the proposed ICI-BDC topology and control method.
AB - In this article, an interleaved coupled-inductor (CI) based bidirectional dc-dc converter (BDC) is proposed with a higher voltage conversion ratio (VCR). In this proposed interleave CI-based BDC (ICI-BDC), the CIs can operate as both a filter inductor and a transformer simultaneously, so that the power density is improved. Moreover, as a transformer, the turns ratio of CIs is used to improve the VCR with a voltage stress reduction purpose. Furthermore, the interleaved technique can well achieve the low current ripple and reduced current stress in this topology. To control ICI-BDC, the pulsewidth modulation plus phase-shift (PPS) control is employed, where the duty cycle is used to match the two side voltages, and the phase-shift angle is used to control the amount and direction of power flow. Uniquely, a difference value is set between the two side duty cycles, and the duty cycle of the high voltage side is smaller than that of the low voltage side by a fixed value. In this proposed control method, all the switches can achieve soft-switching even at light load condition, which can improve transmission efficiency. Experimental results obtained from a 1-kW prototype show a nearly high efficiency under all loading conditions, validating the viability of the proposed ICI-BDC topology and control method.
KW - Bidirectional dc-dc converter (BDC)
KW - Coupled-inductor
KW - High voltage conversion ratio (VCR)
KW - Low current ripple
KW - Soft-switching
UR - http://www.scopus.com/inward/record.url?scp=85112155358&partnerID=8YFLogxK
U2 - 10.1109/TIE.2021.3091926
DO - 10.1109/TIE.2021.3091926
M3 - Journal article
AN - SCOPUS:85112155358
SN - 0278-0046
VL - 69
SP - 5648
EP - 5659
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 6
ER -