Sensorless metal object detection for wireless power transfer using machine learning
ISSN: 0332-1649
Article publication date: 1 November 2021
Issue publication date: 10 May 2022
Abstract
Purpose
This study aims to realize a sensorless metal object detection (MOD) using machine learning, to prevent the wireless power transfer (WPT) system from the risks of electric discharge and fire accidents caused by foreign metal objects.
Design/methodology/approach
The data constructed by analyzing the input impedance using the finite element method are used in machine learning. From the loci of the input impedance of systems, the trained neural network (NN), support vector machine and naive Bayes classifier judge if a metal object exists. Then the proposed method is tested by experiments too.
Findings
In the test using simulated data, all of the three machine learning methods show high accuracy of over 80% for detecting an aluminum cylinder. And in the experimental verifications, the existence of an aluminum cylinder and empty can are successfully identified by a NN.
Originality/value
This work provides a new sensorless MOD method for WPT using three machine learning methods. And it shows that NNs obtain high accuracy than the others in both simulated and experimental verifications.
Keywords
Citation
Gong, Y., Otomo, Y. and Igarashi, H. (2022), "Sensorless metal object detection for wireless power transfer using machine learning", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 41 No. 3, pp. 807-823. https://doi.org/10.1108/COMPEL-03-2021-0069
Publisher
:Emerald Publishing Limited
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