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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

2022 WIRELESS POWER WEEK (WPW)

ISBN

978-1-6654-8445-9

ISSN

—

e-ISSN

—

Počet stran výsledku

5

Strana od-do

567-571

Název nakladatele

IEEE

Místo vydání

NEW YORK, NY

Místo konání akce

Bordeaux

Datum konání akce

5. 7. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000857445700112