TY - GEN
T1 - Challenges in the Z-class compatible inductive power transfer system considering the wide varying range of the coupling coefficient
AU - Zhang, Hua
AU - Mei, Ying
AU - Zhu, Chong
AU - Wang, Yao
AU - Zheng, Sheng
AU - Lu, Fei
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/9
Y1 - 2019/9
N2 - This paper investigates the design of the Z-class compatible inductive power transfer system defined by the SAE-J2954 standard for the light-duty plug-in and electric vehicles. There are mainly three challenges in the practical applications. First, the variation of misalignment and airgap distance can induce a wide varying range of the coupling coefficient, which significantly affects the system power. Second, the tuning of the system power requires a wide range of the input dc voltage, which induces more difficulties in the power electronics converter design. Third, the wide range of the operation voltages, including the input dc voltage and the output battery voltage, can induce the discontinuous current mode, which causes significant waveform distortion and harmonics that affect the system efficiency and stability. A prototype is implemented to validate the analysis, and the experiments achieve 2.75 kW power transfer with 92.7% dc-dc efficiency at 170mm ground clearance. When the clearance increases to 250mm with 75mm x-direction and 100mm y-direction misalignment, it still maintains 1.16 kW power with 89.7% efficiency.
AB - This paper investigates the design of the Z-class compatible inductive power transfer system defined by the SAE-J2954 standard for the light-duty plug-in and electric vehicles. There are mainly three challenges in the practical applications. First, the variation of misalignment and airgap distance can induce a wide varying range of the coupling coefficient, which significantly affects the system power. Second, the tuning of the system power requires a wide range of the input dc voltage, which induces more difficulties in the power electronics converter design. Third, the wide range of the operation voltages, including the input dc voltage and the output battery voltage, can induce the discontinuous current mode, which causes significant waveform distortion and harmonics that affect the system efficiency and stability. A prototype is implemented to validate the analysis, and the experiments achieve 2.75 kW power transfer with 92.7% dc-dc efficiency at 170mm ground clearance. When the clearance increases to 250mm with 75mm x-direction and 100mm y-direction misalignment, it still maintains 1.16 kW power with 89.7% efficiency.
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U2 - 10.1109/ECCE.2019.8913181
DO - 10.1109/ECCE.2019.8913181
M3 - Conference contribution
AN - SCOPUS:85076735737
T3 - 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
SP - 1155
EP - 1158
BT - 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Y2 - 29 September 2019 through 3 October 2019
ER -