TY - JOUR
T1 - Analysis and Design of Load-Independent, Efficient, Transformerless Multilevel Online Inductive Power Transfer System
AU - Lee, Jaehong
AU - Lee, Seung Hwan
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2024/9/1
Y1 - 2024/9/1
N2 - A new transformerless multilevel inductive power transfer (IPT) system was proposed in 2022. It consisted of a multilevel converter, multiple excitation coils, and impedance-matching networks instead of high-frequency transformers. The prior work was limited in introducing the new IPT system and the design methodology for a transformerless IPT system has not been investigated yet. In this study, a new design methodology for transformerless multilevel IPT systems is proposed. The properties and design considerations for the system are identified in the initial stage. It is shown that the harmonic current, parameter-sensitive input impedance, load-dependent output voltage, and efficiency are the main issues of the system. The new design method determines the circuit parameters regarding those main issues and their tradeoffs. The viability of this design methodology was evaluated using simulation results of a medium-voltage input (22.9 kVrms), 1-MW, 42-level online IPT system. In addition, an experimental test bed of 800-W, 4-level IPT system was constructed for the evaluation. The simulation and experimental results showed a good agreement with the theoretical results as well.
AB - A new transformerless multilevel inductive power transfer (IPT) system was proposed in 2022. It consisted of a multilevel converter, multiple excitation coils, and impedance-matching networks instead of high-frequency transformers. The prior work was limited in introducing the new IPT system and the design methodology for a transformerless IPT system has not been investigated yet. In this study, a new design methodology for transformerless multilevel IPT systems is proposed. The properties and design considerations for the system are identified in the initial stage. It is shown that the harmonic current, parameter-sensitive input impedance, load-dependent output voltage, and efficiency are the main issues of the system. The new design method determines the circuit parameters regarding those main issues and their tradeoffs. The viability of this design methodology was evaluated using simulation results of a medium-voltage input (22.9 kVrms), 1-MW, 42-level online IPT system. In addition, an experimental test bed of 800-W, 4-level IPT system was constructed for the evaluation. The simulation and experimental results showed a good agreement with the theoretical results as well.
KW - Impedance matching network (IMN)
KW - inductive power transfer (IPT)
KW - multilevel converter
KW - transformerless
UR - http://www.scopus.com/inward/record.url?scp=85179041798&partnerID=8YFLogxK
U2 - 10.1109/TIE.2023.3329227
DO - 10.1109/TIE.2023.3329227
M3 - Article
AN - SCOPUS:85179041798
SN - 0278-0046
VL - 71
SP - 10455
EP - 10464
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 9
ER -