8-Plate Multi-Resonant Coupling Using a Class-E2 Power Converter for Misalignments in Capacitive Wireless Power Transfer

Bezawada, Yashwanth; Dhali, Shirshak K.

doi:10.3390/electronics11040635

Title: 8-Plate Multi-Resonant Coupling Using a Class-E² Power Converter for Misalignments in Capacitive Wireless Power Transfer

Journal Article · 18 February 2022 · Electronics

DOI: https://doi.org/10.3390/electronics11040635 · OSTI ID:1845903

Bezawada, Yashwanth ^[1];

^[2]

Old Dominion Univ., Norfolk, VA (United States); Old Dominon University
Old Dominion Univ., Norfolk, VA (United States)

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.

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Research Organization:: Old Dominion Univ., Norfolk, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0020183

OSTI ID:: 1845903

Journal Information:: Electronics, Journal Name: Electronics Journal Issue: 4 Vol. 11; ISSN 2079-9292

Publisher:: MDPICopyright Statement

Country of Publication:: United States

Language:: English

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Title: 8-Plate Multi-Resonant Coupling Using a Class-E2 Power Converter for Misalignments in Capacitive Wireless Power Transfer

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Title: 8-Plate Multi-Resonant Coupling Using a Class-E² Power Converter for Misalignments in Capacitive Wireless Power Transfer