A High-Efficiency DC/DC Converter for High-Voltage-Gain, High-Current Applications

Yaxiao Qin; Yun Yang; Sinan Li; Ying Huang; Siew-Chong Tan; Shu Yuen Hui

doi:10.1109/JESTPE.2019.2908416

A High-Efficiency DC/DC Converter for High-Voltage-Gain, High-Current Applications

Yaxiao Qin^*, Yun Yang, Sinan Li, Ying Huang, Siew-Chong Tan, Shu Yuen Hui

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

46 Citations (Scopus)

Abstract

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. © 2019 IEEE.

Original language	English
Pages (from-to)	2812-2823
Journal	IEEE Journal of Emerging and Selected Topics in Power Electronics
Volume	8
Issue number	3
Online published	1 Apr 2019
DOIs	https://doi.org/10.1109/JESTPE.2019.2908416
Publication status	Published - Sept 2020
Externally published	Yes

Funding

This work was supported by the Research Grants Council of the Hong Kong Special Administration Region, China, under Grant C7051-17G.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

DC microgrids
high efficiency
high-frequency hybrid converter
high-voltage conversion ratio
low cost
low-voltage stress

RGC Funding Information

RGC-funded

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10.1109/JESTPE.2019.2908416

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title = "A High-Efficiency DC/DC Converter for High-Voltage-Gain, High-Current Applications",

abstract = "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. {\textcopyright} 2019 IEEE.",

keywords = "DC microgrids, high efficiency, high-frequency hybrid converter, high-voltage conversion ratio, low cost, low-voltage stress",

author = "Yaxiao Qin and Yun Yang and Sinan Li and Ying Huang and Siew-Chong Tan and Hui, {Shu Yuen}",

year = "2020",

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doi = "10.1109/JESTPE.2019.2908416",

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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

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. © 2019 IEEE.

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. © 2019 IEEE.

KW - DC microgrids

KW - high efficiency

KW - high-frequency hybrid converter

KW - high-voltage conversion ratio

KW - low cost

KW - low-voltage stress

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U2 - 10.1109/JESTPE.2019.2908416

DO - 10.1109/JESTPE.2019.2908416

M3 - RGC 21 - Publication in refereed journal

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

ER -

A High-Efficiency DC/DC Converter for High-Voltage-Gain, High-Current Applications

Abstract

Funding

UN SDGs

Research Keywords

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