TY - GEN
T1 - A hybrid bidirectional DC-DC converter for dual-voltage automotive systems
AU - Li, Shouxiang
AU - Smedley, Keyue Ma
AU - Caldas, Diego Reis
AU - Martins, Yan Watanabe
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/5/17
Y1 - 2017/5/17
N2 - With the increasing power demand of automotive systems, a 42V power system has the trend to coexist with the traditional 14V system in order to decrease the system current stress. In the dual-voltage and dual-battery architecture, a compact, high efficient and bidirectional DC/DC converter is typically needed. In this paper, a hybrid bidirectional DC-DC converter for 42/14V dual-voltage automotive systems is presented. This converter is a hybrid combination of a switched-capacitor converter and an inductor-based converter with low number of components, whose input current ripple and peak charging current are small with the help of the inductor. The nominal duty cycle for the 42/14V system is 0.5, so it will not go to extreme values even if the battery is overcharged to a higher voltage value or is depleted to a lower voltage value, therefore increasing the voltage-gain range and ensuring high efficiency. A comprehensive analysis of steady-state operation, small signal model and component stress is given. A 42/14V prototype rated at 20∼120W with a peak efficiency of 97.8% in boost mode and 98.3% in buck mode was built to verify the analyses.
AB - With the increasing power demand of automotive systems, a 42V power system has the trend to coexist with the traditional 14V system in order to decrease the system current stress. In the dual-voltage and dual-battery architecture, a compact, high efficient and bidirectional DC/DC converter is typically needed. In this paper, a hybrid bidirectional DC-DC converter for 42/14V dual-voltage automotive systems is presented. This converter is a hybrid combination of a switched-capacitor converter and an inductor-based converter with low number of components, whose input current ripple and peak charging current are small with the help of the inductor. The nominal duty cycle for the 42/14V system is 0.5, so it will not go to extreme values even if the battery is overcharged to a higher voltage value or is depleted to a lower voltage value, therefore increasing the voltage-gain range and ensuring high efficiency. A comprehensive analysis of steady-state operation, small signal model and component stress is given. A 42/14V prototype rated at 20∼120W with a peak efficiency of 97.8% in boost mode and 98.3% in buck mode was built to verify the analyses.
KW - Bidirectional
KW - Dc/dc converter
KW - Hybrid
UR - http://www.scopus.com/inward/record.url?scp=85020016078&partnerID=8YFLogxK
U2 - 10.1109/APEC.2017.7930717
DO - 10.1109/APEC.2017.7930717
M3 - Conference contribution
AN - SCOPUS:85020016078
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 355
EP - 361
BT - 2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
Y2 - 26 March 2017 through 30 March 2017
ER -