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A 13.56 MHz bidirectional IPT system with wirelessly synchronised transceivers for ultra-low coupling operation

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Title: A 13.56 MHz bidirectional IPT system with wirelessly synchronised transceivers for ultra-low coupling operation
Authors: Pucci, N
Arteaga, JM
Kwan, CH
Yates, DC
Mitcheson, PD
Item Type: Conference Paper
Abstract: This paper presents a high-frequency inductive power transfer (HF-IPT) system with bidirectional capability employing a new wireless synchronisation method. Synchronisation is achieved by transmitting a reference ultra high frequency tone (433.92 MHz) that is stepped down to 13.56 MHz in each transceiver. This allows the operating frequency to be locked across the two sides of the system. Afterwards, a phase search is performed looking for maximum power throughput, determining the phase at the point of resonance (i.e., no reflected reactances). The experimental implementation is achieved with two back-to-back Class EF coil-drivers driven by independent synchronisation circuits. In the experimental setup a constant input voltage is set for each of the two coil-drivers by implementing a source-sink configuration, emulating a bidirectional DC-DC conversion stage at each side. Experimental results show successful transceiver synchronisation, and 4 W were transferred from one end to the other and conversely at an ultra-low coupling of 1.6%. This proves that the combination of the load-independent Class EF transceivers and the synchronisation technique introduced herein is suitable for applications that require large tolerance to misalignment and air gaps larger than one coil diameter, such as in micro e-mobility.
Issue Date: 16-Nov-2021
Date of Acceptance: 1-Nov-2021
URI: http://hdl.handle.net/10044/1/93967
DOI: 10.1109/ecce47101.2021.9595541
Publisher: IEEE
Start Page: 5781
End Page: 5787
Journal / Book Title: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)
Copyright Statement: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor/Funder: Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Engineering & Physical Science Research Council (E
Natural Environment Research Council (NERC)
Funder's Grant Number: EP/R511547/1
Ref: R122041-101/86440
R100040-101 (EP/R029504/1)
NE/T011467/1
Conference Name: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)
Publication Status: Published
Start Date: 2021-10-10
Finish Date: 2021-10-14
Conference Place: Vancouver, BC, Canada
Online Publication Date: 2021-11-16
Appears in Collections:Electrical and Electronic Engineering