TY - GEN
T1 - Solving Duty-ratio Limitation for Four-phase Input-Parallel Output-Series DC-DC Converter with Asymmetrical PWM Scheme
AU - Bui, Van Dai
AU - Cha, Honnyong
N1 - Publisher Copyright:
© 2023 The Korean Institute of Power Electronics.
PY - 2023
Y1 - 2023
N2 - The literature has conducted many studies on the input-parallel output-series (IPOS) converter. To increase the voltage gain, by synthesizing two single IPOS converters, a four-phase input-parallel output-series (4P- IPOS) converter was introduced recently. However, the duty ratio must be greater than 0.5 (i.e., D > 0.5) for the converter to work correctly, so it suffers from duty-ratio limitation. Moreover, there was no study on using a bipolar DC grid or a dual-output configuration. This paper proposed an asymmetrical PWM scheme, which easily implements to solve the duty-ratio limitation of the 4P-IPOS converter. Additionally, the use of a dual-output connection is studied. As a result, the converter not only can work with D < 0.5 and maintains the high voltage gain (Formula Presented). , but also achieve outputs voltage balancing (i.e., Vo1= Vo2) as well as currents balancing (i.e., IL1= IL2, IL3= IL4). An 800-W prototype converter is used in simulation and experimentation to validate the suggested PWM technique.
AB - The literature has conducted many studies on the input-parallel output-series (IPOS) converter. To increase the voltage gain, by synthesizing two single IPOS converters, a four-phase input-parallel output-series (4P- IPOS) converter was introduced recently. However, the duty ratio must be greater than 0.5 (i.e., D > 0.5) for the converter to work correctly, so it suffers from duty-ratio limitation. Moreover, there was no study on using a bipolar DC grid or a dual-output configuration. This paper proposed an asymmetrical PWM scheme, which easily implements to solve the duty-ratio limitation of the 4P-IPOS converter. Additionally, the use of a dual-output connection is studied. As a result, the converter not only can work with D < 0.5 and maintains the high voltage gain (Formula Presented). , but also achieve outputs voltage balancing (i.e., Vo1= Vo2) as well as currents balancing (i.e., IL1= IL2, IL3= IL4). An 800-W prototype converter is used in simulation and experimentation to validate the suggested PWM technique.
KW - Asymmetrical pulse-width modulation (PWM)
KW - boost converter
KW - current balancing
KW - dual-output
KW - high step-up converter
KW - input-parallel output-series (IPOS) converter
KW - voltage balancing
UR - http://www.scopus.com/inward/record.url?scp=85170648644&partnerID=8YFLogxK
U2 - 10.23919/ICPE2023-ECCEAsia54778.2023.10213512
DO - 10.23919/ICPE2023-ECCEAsia54778.2023.10213512
M3 - Conference contribution
AN - SCOPUS:85170648644
T3 - ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia: Green World with Power Electronics
SP - 2924
EP - 2929
BT - ICPE 2023-ECCE Asia - 11th International Conference on Power Electronics - ECCE Asia
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia
Y2 - 22 May 2023 through 25 May 2023
ER -