Document Type

Article

Publication Date

2022

DOI

10.3390/electronics11040635

Publication Title

Electronics

Volume

11

Issue

4

Pages

1-12

Abstract

Misalignment is a common issue in wireless power transfer systems. It shifts the resonant frequency away from the operating frequency that affects the power flow and efficiency from the charging station to the load. This work proposes a novel capacitive wireless power transfer (CPT) using an 8-plate multi-resonant capacitive coupling to minimize the effect of misalignments. A single-active switch class-E2 power converter is utilized to achieve multi-resonance through the selection of different resonant inductors. Simulations show a widening of the resonant frequency band which offers better performance than a regular 4-plate capacitive coupling for misalignments. The hardware results of the 8-plate multi-resonant coupling show an efficiency of 88.5% for the 20.8 W test, which is 18.3% higher than that of the regular 4-plate coupling. Because of the wider resonant frequency band {455–485 kHz}, compared with the regular 4-plate coupling, the proposed design minimized the output voltage drop by 15% for a 10% misalignment. Even for large misalignments, the 8-plate performance improved by 40% compared with the 4-plate coupling.

Comments

© 2022 by the authors.

This is an open access article distributed under the Creative Commons Attribution 4.0 International License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Original Publication Citation

Bezawada, Y., & Dhali, S. K. (2022). 8-Plate multi-resonant coupling using a class-E2 power converter for misalignments in capacitive wireless power transfer. Electronics, 11(4), 1-12, Article 635. https://doi.org/10.3390/electronics11040635

ORCID

0000-0002-7886-3987 (Dhali)

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