Novel Method of Metal Object Detection Based on the Bifurcation Phenomena in Inductive Power Transfer

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F22%3A00360546" target="_blank" >RIV/68407700:21230/22:00360546 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1109/WPW54272.2022.9853970" target="_blank" >http://dx.doi.org/10.1109/WPW54272.2022.9853970</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/WPW54272.2022.9853970" target="_blank" >10.1109/WPW54272.2022.9853970</a>

Result language

angličtina

Original language name

Novel Method of Metal Object Detection Based on the Bifurcation Phenomena in Inductive Power Transfer

Original language description

This work presents a novel, sensorless method of metal object detection (MOD) based on the bifurcation phenomenon in inductive power transfer (IPT). Our method is based on measuring the amplitudes of two peaks of the primary current, which emerge in bifurcation. Bifurcation is achieved by shorting the load; thus, the method is applicable in standby mode, e.g., before initiating power transfer. For a tuned system without a metal object (MO) nearby, these current peaks have equal magnitudes. However, if a MO is coupled to the charging pads, then the magnitudes are generally not equal. When the measured amplitude imbalance exceeds a threshold, the MO is positively detected. The benefit of our approach is that it only requires a relative, primary-side measurement of two resonant peak amplitudes. Assuming the primary and secondary resonators are closely tuned, no additional calibration is necessary. In contrast, traditional sensorless MOD approaches generally require wireless communication between the secondary and primary and/or initial parameter measurements and calibration if certain parameters are not accurately known a priori. After developing the theory, we experimentally verify our bifurcation-based MOD approach using a IPT system with a parasitically coupled coin and compare our results to that of a traditional resonant frequency-based MOD approach.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

—

Continuities

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

2022 WIRELESS POWER WEEK (WPW)

ISBN

978-1-6654-8445-9

ISSN

—

e-ISSN

—

Number of pages

5

Pages from-to

567-571

Publisher name

IEEE

Place of publication

NEW YORK, NY

Event location

Bordeaux

Event date

Jul 5, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000857445700112