A Wireless Charging System Applying Phase-Shift and Amplitude Control to Maximize Efficiency and Extractable Power
By Andreas Berger, M. Agostinelli, S. Vesti, J. Oliver, J. Cobos, M. Huemer. IEEE transactions on power electronics, 2015
306 citations recorded by the source corpus.
Wireless power transfer (WPT) is an emerging technology with an increasing number of potential applications to transfer power from a transmitter to a mobile receiver over a relatively large air gap. However, its widespread application is hampered due to the relatively low efficiency of current Wireless power transfer (WPT) systems. This study presents a concept to maximize the efficiency as well as to increase the amount of extractable power of a WPT system operating in nonresonant operation. The proposed method is based on actively modifying the equivalent secondary-side load impedance by controlling the phase-shift of the active rectifier and its output voltage level. The presented hardware prototype represents a complete wireless charging system, including a dc-dc converter which is used to charge a battery at the output of the system. Experimental results are shown for the proposed concept in comparison to a conventional synchronous rectification approach. The presented optimization method clearly outperforms state-of-the-art solutions in terms of efficiency and extractable power.
Subfields: Automotive Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/88ded8b8b80709cb92ce1858c82b9ae9b61e186c
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Citations in the corpus
- Wireless Power Transfer—An Overview (2019, background): “impedance can be modified to maximize the energy transmission efficiency [32].”
- An Active-Rectifier-Based Maximum Efficiency Tracking Method Using an Additional Measurement Coil for Wireless Power Transfer (2018, methodology): “Generally, these methods employ power electronic converters, such as semibridge rectifier [18], full-bridge rectifier [19], dc/dc converters [20]–[23], etc.”
- Hybrid and Reconfigurable IPT Systems With High-Misalignment Tolerance for Constant-Current and Constant-Voltage Battery Charging (2018, background): “1) The control schemes for a high-frequency inverter (HFI): The IPT systems with phase shift control schemes for the HFI can adjust the charging current or charging voltage against various loads [11].”