TY - GEN
T1 - A Large-scale Wireless Charging Station for Electric Vehicles
AU - Lee, Jaehong
AU - Lee, Seung Hwan
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - This paper proposes a large-scale, high-power, transformerless, multilevel wireless charging station for electric vehicles (EVs) using a multilevel rectifier, resonant inverters, and excitation coils. The multilevel rectifier converts the medium voltage (MV, 22.9 kVrms in S.Korea) of the electrical grid to 42 levels of 1 kV. Forty-two resonant inverters and excitation coils generate synchronized magnetic fields and induce voltage and current to a transmitter coil. Then, the transmitter coil induces voltages on receiver coils mounted on EVs. The proposed topology has the advantage of balancing the cell voltages of the multilevel converter for arbitrary load conditions. The input impedance seen from each converter is balanced regardless of the load numbers and their conditions. Circuit analysis of the multilevel inductive power transfer (IPT) system with multiple loads is presented to achieve load-independent output voltages. In addition, a novel dq synchronous reference frame controller for the multilevel rectifier is proposed. A 42-level IPT system with ten receiver coils was evaluated with simulation results. The cell balancing of the multilevel converter and the load-independent output voltages were achieved.
AB - This paper proposes a large-scale, high-power, transformerless, multilevel wireless charging station for electric vehicles (EVs) using a multilevel rectifier, resonant inverters, and excitation coils. The multilevel rectifier converts the medium voltage (MV, 22.9 kVrms in S.Korea) of the electrical grid to 42 levels of 1 kV. Forty-two resonant inverters and excitation coils generate synchronized magnetic fields and induce voltage and current to a transmitter coil. Then, the transmitter coil induces voltages on receiver coils mounted on EVs. The proposed topology has the advantage of balancing the cell voltages of the multilevel converter for arbitrary load conditions. The input impedance seen from each converter is balanced regardless of the load numbers and their conditions. Circuit analysis of the multilevel inductive power transfer (IPT) system with multiple loads is presented to achieve load-independent output voltages. In addition, a novel dq synchronous reference frame controller for the multilevel rectifier is proposed. A 42-level IPT system with ten receiver coils was evaluated with simulation results. The cell balancing of the multilevel converter and the load-independent output voltages were achieved.
KW - excitation coils
KW - impedance matching
KW - inductive power transfer
KW - multilevel converter
KW - voltage balance control
UR - http://www.scopus.com/inward/record.url?scp=85144079275&partnerID=8YFLogxK
U2 - 10.1109/ECCE50734.2022.9948175
DO - 10.1109/ECCE50734.2022.9948175
M3 - Conference contribution
AN - SCOPUS:85144079275
T3 - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
BT - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Y2 - 9 October 2022 through 13 October 2022
ER -
