TY - JOUR
T1 - Output Voltage Range of a Power-Loaded Series-Series Compensated Inductive Wireless Power Transfer Link Operating in Load-Independent Regime
AU - Frechter, Yotam
AU - Kuperman, Alon
N1 - Funding Information: Manuscript received June 13, 2019; revised August 7, 2019 and September 22, 2019; accepted October 25, 2019. Date of publication November 11, 2019; date of current version February 20, 2020. This work was supported by the Israel Innovation Authority. Recommended for publication by Associate Editor M. Vitelli. (Corresponding author: Alon Kuperman.) The authors are with Applied Energy Laboratory, School of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Be’er Sheva 84105, Israel (e-mail: frechter@post.bgu.ac.il; alonk@bgu.ac.il). Publisher Copyright: © 1986-2012 IEEE.
PY - 2020/6/1
Y1 - 2020/6/1
N2 - The article proposes an in-depth analysis of a series-series compensated resonant inductive wireless power transfer (WPT) link, operating at load-independent frequency while feeding a power load. It is shown that due to the presence of equivalent series resistances in practical systems, a load-independent operation point is only an approximation. The output voltage is still affected by the load, obtaining minimum and maximum values under rated load and no-load operation, respectively. While the output voltage value under rated load is typically well predicted by the commonly used first-harmonic-approximation-based equivalent circuit, the latter is unsuitable for obtaining the output voltage value under light loading due to nonlinearity caused by the discontinuous conduction mode of the secondary. Time-domain analysis is, therefore, used to accurately predict the WPT output voltage value under zero-load operation and accurately derive the expected WPT output voltage range in the load-independent regime. Simulations and experiments based on a 400-V 1-kW WPT link demonstrate excellent matching, validating the proposed analysis.
AB - The article proposes an in-depth analysis of a series-series compensated resonant inductive wireless power transfer (WPT) link, operating at load-independent frequency while feeding a power load. It is shown that due to the presence of equivalent series resistances in practical systems, a load-independent operation point is only an approximation. The output voltage is still affected by the load, obtaining minimum and maximum values under rated load and no-load operation, respectively. While the output voltage value under rated load is typically well predicted by the commonly used first-harmonic-approximation-based equivalent circuit, the latter is unsuitable for obtaining the output voltage value under light loading due to nonlinearity caused by the discontinuous conduction mode of the secondary. Time-domain analysis is, therefore, used to accurately predict the WPT output voltage value under zero-load operation and accurately derive the expected WPT output voltage range in the load-independent regime. Simulations and experiments based on a 400-V 1-kW WPT link demonstrate excellent matching, validating the proposed analysis.
KW - Load-independent frequency
KW - output voltage
KW - resonant inductive wireless power transfer (WPT)
KW - series-series compensation
UR - http://www.scopus.com/inward/record.url?scp=85080865292&partnerID=8YFLogxK
U2 - https://doi.org/10.1109/TPEL.2019.2953200
DO - https://doi.org/10.1109/TPEL.2019.2953200
M3 - Article
SN - 0885-8993
VL - 35
SP - 6586
EP - 6593
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 6
M1 - 8896949
ER -