TY - JOUR
T1 - A Hybrid Cascaded Multilevel Converter Based on Three-Level Cells for Battery Energy Management Applied in Electric Vehicles
AU - Gao, Zhigang
AU - Lu, Qi
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2019/8
Y1 - 2019/8
N2 - In order to produce more voltage levels and meet the requirement of the motor drive in electric vehicles (EVs), a hybrid cascaded multilevel converter based on three-level (TL) cells is proposed in this paper. In each unit, there is a battery and two series-connected capacitors, which hold a half of the battery voltage, respectively. Each TL cell is controlled to be connected or bypassed by a converter unit because of the modular structure. Three voltage levels can be produced when the TL cell is connected. All TL cells are cascaded to produce a staircase dc voltage, and an H-bridge is utilized to alternate the direction of it to form the ac output voltage. Compared to similar converter based on half-bridge arms, the proposed topology is able to produce more voltage levels with same number of battery modules. Voltage balances among TL cells and between two capacitors in each TL cell are both realized by a proposed overall control strategy. Experiments are provided to show the validity of the analysis.
AB - In order to produce more voltage levels and meet the requirement of the motor drive in electric vehicles (EVs), a hybrid cascaded multilevel converter based on three-level (TL) cells is proposed in this paper. In each unit, there is a battery and two series-connected capacitors, which hold a half of the battery voltage, respectively. Each TL cell is controlled to be connected or bypassed by a converter unit because of the modular structure. Three voltage levels can be produced when the TL cell is connected. All TL cells are cascaded to produce a staircase dc voltage, and an H-bridge is utilized to alternate the direction of it to form the ac output voltage. Compared to similar converter based on half-bridge arms, the proposed topology is able to produce more voltage levels with same number of battery modules. Voltage balances among TL cells and between two capacitors in each TL cell are both realized by a proposed overall control strategy. Experiments are provided to show the validity of the analysis.
KW - Electric vehicle (EV)
KW - hybrid cascaded multilevel converter
KW - overall control strategy
KW - three-level (TL) cells
KW - voltage balance
UR - http://www.scopus.com/inward/record.url?scp=85057193550&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2018.2882851
DO - 10.1109/TPEL.2018.2882851
M3 - Article
AN - SCOPUS:85057193550
SN - 0885-8993
VL - 34
SP - 7326
EP - 7349
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 8
M1 - 8543216
ER -