TY - JOUR
T1 - A High-Efficiency DC/DC Converter for High-Voltage-Gain, High-Current Applications
AU - Qin, Yaxiao
AU - Yang, Yun
AU - Li, Sinan
AU - Huang, Ying
AU - Tan, Siew Chong
AU - Hui, Shu Yuen
N1 - Funding Information:
Manuscript received October 22, 2018; revised January 14, 2019 and March 5, 2019; accepted March 7, 2019. Date of publication April 1, 2019; date of current version August 4, 2020. This work was supported by the Research Grants Council of the Hong Kong Special Administration Region, China, under Grant C7051-17G. Recommended for publication by Associate Editor Yijie Wang. (Corresponding author: Yaxiao Qin.) Y. Qin, Y. Yang, S. Li, Y. Huang, and S.-C. Tan are with the Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong (e-mail: yxqin@connect.hku.hk; cacaloto@hku.hk; s.li@bath.ac.uk; yhuang@eee.hku.hk; sctan@eee.hku.hk).
Publisher Copyright:
© 2013 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/9
Y1 - 2020/9
N2 - A new class of high-voltage-gain dc-dc converters for high-efficiency and transformer-less dc-dc applications, where large voltage step-up ratios are required, is presented in this paper. The converter is derived from the hybrid integration of a switched-capacitor converter and a boost converter. It features high step-up voltage conversion ratio with a moderate duty cycle, nonpulsating input current, low-voltage stress on all of the switches, easy implementation of control and driving circuits, scalability for high-current high-power applications, and low cost due to reduced components via combination of a two-stage converter into a single-stage converter. Full soft-charging operation and minimal device voltage stresses are achieved under all operating conditions. Steady-state operations of the converter are comprehensively analyzed. A 300-W prototype of a 19-time converter achieving the peak efficiency of 96.1% is built. Both simulation and experimental results validating the theoretical analysis and operation of the converter are provided.
AB - A new class of high-voltage-gain dc-dc converters for high-efficiency and transformer-less dc-dc applications, where large voltage step-up ratios are required, is presented in this paper. The converter is derived from the hybrid integration of a switched-capacitor converter and a boost converter. It features high step-up voltage conversion ratio with a moderate duty cycle, nonpulsating input current, low-voltage stress on all of the switches, easy implementation of control and driving circuits, scalability for high-current high-power applications, and low cost due to reduced components via combination of a two-stage converter into a single-stage converter. Full soft-charging operation and minimal device voltage stresses are achieved under all operating conditions. Steady-state operations of the converter are comprehensively analyzed. A 300-W prototype of a 19-time converter achieving the peak efficiency of 96.1% is built. Both simulation and experimental results validating the theoretical analysis and operation of the converter are provided.
KW - DC microgrids
KW - high efficiency
KW - high-frequency hybrid converter
KW - high-voltage conversion ratio
KW - low cost
KW - low-voltage stress
UR - http://www.scopus.com/inward/record.url?scp=85090397911&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2019.2908416
DO - 10.1109/JESTPE.2019.2908416
M3 - Journal article
AN - SCOPUS:85090397911
SN - 2168-6777
VL - 8
SP - 2812
EP - 2823
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 3
M1 - 8678676
ER -