TY - GEN
T1 - Practical Issues with Unloaded Resonant Inductive WPT Link Operating in Load-Independent Regime
AU - Frechter, Yotam
AU - Darhovsky, Yegal
AU - Kuperman, Alon
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/11/1
Y1 - 2019/11/1
N2 - The paper reveals practical issues present in series-series compensated unloaded inductive wireless power transfer system operating in load-independent regime. It was recently shown, that due to existence of parasitic resistances, corresponding output voltage is not completely load-independent. Based on time-domain analysis, DC voltage gain of an unloaded system was predicted for a wide range of operation frequencies. However, parasitic lumped capacitance of the receiving coil was not taken into account. It is therefore shown that parasitic oscillations appearing in an unloaded secondary impose significant overvoltage at DC output, which may cause safety issues. Two possible solutions are discussed, allowing damping the oscillations thus making the unloaded operation feasible. The presented analysis is well-verified by simulation results and experiments of a 400V, 1kW inductive wireless power transfer link.
AB - The paper reveals practical issues present in series-series compensated unloaded inductive wireless power transfer system operating in load-independent regime. It was recently shown, that due to existence of parasitic resistances, corresponding output voltage is not completely load-independent. Based on time-domain analysis, DC voltage gain of an unloaded system was predicted for a wide range of operation frequencies. However, parasitic lumped capacitance of the receiving coil was not taken into account. It is therefore shown that parasitic oscillations appearing in an unloaded secondary impose significant overvoltage at DC output, which may cause safety issues. Two possible solutions are discussed, allowing damping the oscillations thus making the unloaded operation feasible. The presented analysis is well-verified by simulation results and experiments of a 400V, 1kW inductive wireless power transfer link.
KW - Inductive power transfer
KW - load-independent frequency
KW - no-load operation
UR - http://www.scopus.com/inward/record.url?scp=85078905945&partnerID=8YFLogxK
U2 - 10.1109/COMCAS44984.2019.8958269
DO - 10.1109/COMCAS44984.2019.8958269
M3 - Conference contribution
AN - SCOPUS:85078905945
T3 - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
BT - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
PB - Institute of Electrical and Electronics Engineers
T2 - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
Y2 - 4 November 2019 through 6 November 2019
ER -