TY - GEN
T1 - A Hybrid Half-bridge LLC Resonant Converter and Phase Shifted Full-bridge Converter for High Step-up Application
AU - Wei, Yuqi
AU - Luo, Quanming
AU - Mantooth, Alan
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/9/23
Y1 - 2020/9/23
N2 - High step-up DC/DC converters are popular in renewable energy generation systems, like photovoltaic (PV) and fuel cell. To achieve high step-up conversion ratio, in this paper, an input-parallel and output-series hybrid topology of half-bridge LLC resonant converter and phase shifted full-bridge converter (PSFB) is proposed. The following features have been achieved: 1) high voltage conversion ratio: due to the output series connection, the system voltage conversion ratio equals to the sum of LLC resonant converter and PSFB converter. In addition, the voltage doubler rectifier is adopted for the LLC resonant converter to further increase the voltage gain; 2) LLC resonant converter is operating at the series resonant frequency operating point, its voltage conversion ratio is constant and independent of the load, and the high efficiency conversion is achieved; 3) function decoupling idea is adopted for the proposed topology, most of the power is handled by the high efficiency conversion unit-LLC resonant converter, while the PSFB unit is used to regulate the output voltage; 4) since both two converter units are isolated DC/DC converter, fully isolation between the input voltage and output voltage is achieved. Operational principles, design considerations, and experimental validation are presented.
AB - High step-up DC/DC converters are popular in renewable energy generation systems, like photovoltaic (PV) and fuel cell. To achieve high step-up conversion ratio, in this paper, an input-parallel and output-series hybrid topology of half-bridge LLC resonant converter and phase shifted full-bridge converter (PSFB) is proposed. The following features have been achieved: 1) high voltage conversion ratio: due to the output series connection, the system voltage conversion ratio equals to the sum of LLC resonant converter and PSFB converter. In addition, the voltage doubler rectifier is adopted for the LLC resonant converter to further increase the voltage gain; 2) LLC resonant converter is operating at the series resonant frequency operating point, its voltage conversion ratio is constant and independent of the load, and the high efficiency conversion is achieved; 3) function decoupling idea is adopted for the proposed topology, most of the power is handled by the high efficiency conversion unit-LLC resonant converter, while the PSFB unit is used to regulate the output voltage; 4) since both two converter units are isolated DC/DC converter, fully isolation between the input voltage and output voltage is achieved. Operational principles, design considerations, and experimental validation are presented.
KW - LLC resonant converter
KW - Step-up converter
KW - phase shift control
UR - https://www.scopus.com/pages/publications/85102248601
U2 - 10.1109/WiPDAAsia49671.2020.9360292
DO - 10.1109/WiPDAAsia49671.2020.9360292
M3 - 会议稿件
AN - SCOPUS:85102248601
T3 - 2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia, WiPDA Asia 2020
BT - 2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia, WiPDA Asia 2020
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia, WiPDA Asia 2020
Y2 - 23 September 2020 through 25 September 2020
ER -
