TY - GEN
T1 - DC Link Voltage Optimization for Efficiency Enhancement of Electric Vehicle Onboard Chargers
AU - Kazemtarghi, Abed
AU - Ishraq, Naveed
AU - Rathod, Parth
AU - Mallik, Ayan
AU - Johnson, Nathan
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Electric vehicles (EVs) are becoming increasingly popular, so it is important to study the efficiency of the EV onboard charging (OBC) systems comprehensively. This paper is focused on the DC link voltage optimization to enhance the overall grid to vehicle (G2V) charging efficiency of the OBC. An EV OBC with ac-dc power factor correction (PFC) and dc-dc dual active bridge (DAB) stages is studied, where the power losses for various converter components are formulated as functions of DC link voltage, battery voltage, and charging power. Afterwards, the optimal DC link voltages corresponding to the minimum total loss at different charging conditions are obtained from theoretical analysis of the circuit for both level-1 and level-2 chargers. A 500 W OBC prototype is experimented in two cases, and the results show that the optimal DC link selection of 345V yields to an overall efficiency improvement of 2% compared to the fixed DC link design (at 400V), while the PFC and DAB stage efficiencies are individually improved and declined by 2.6% and 0.5%, respectively.
AB - Electric vehicles (EVs) are becoming increasingly popular, so it is important to study the efficiency of the EV onboard charging (OBC) systems comprehensively. This paper is focused on the DC link voltage optimization to enhance the overall grid to vehicle (G2V) charging efficiency of the OBC. An EV OBC with ac-dc power factor correction (PFC) and dc-dc dual active bridge (DAB) stages is studied, where the power losses for various converter components are formulated as functions of DC link voltage, battery voltage, and charging power. Afterwards, the optimal DC link voltages corresponding to the minimum total loss at different charging conditions are obtained from theoretical analysis of the circuit for both level-1 and level-2 chargers. A 500 W OBC prototype is experimented in two cases, and the results show that the optimal DC link selection of 345V yields to an overall efficiency improvement of 2% compared to the fixed DC link design (at 400V), while the PFC and DAB stage efficiencies are individually improved and declined by 2.6% and 0.5%, respectively.
KW - DC link voltage
KW - efficiency enhancement
KW - electric vehicle (EV) charging
KW - optimization
UR - http://www.scopus.com/inward/record.url?scp=85186744977&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85186744977&partnerID=8YFLogxK
U2 - 10.1109/ONCON60463.2023.10431027
DO - 10.1109/ONCON60463.2023.10431027
M3 - Conference contribution
AN - SCOPUS:85186744977
T3 - 2023 IEEE 2nd Industrial Electronics Society Annual On-Line Conference, ONCON 2023
BT - 2023 IEEE 2nd Industrial Electronics Society Annual On-Line Conference, ONCON 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2023
Y2 - 8 December 2023 through 10 December 2023
ER -