Implementation of an Accurate Measurement Method for the Spatial Distribution of the Electromagnetic Field in a WPT System

In an inductive wireless power transfer (WPT) system, the transferred power depends on the coupling between the transmitter coil and the receiver coil and, consequently, on their spatial positioning with respect to each other. Since this positioning needs to be as flexible as possible, one can desig...

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Bibliographic Details
Published in:Applied sciences 2023-05, Vol.13 (9), p.5773
Main Authors: Petrascu, Calin, Tulbure, Adrian, Topa, Vasile
Format: Article
Language:English
Subjects:
Analysis
Calibration
calibration solutions
Communications equipment
electromagnetic field intensity
Electromagnetic fields
Electromagnetism
EMF distribution
emitting coil
Interpolation
investigation method
Investigations
Magnetic fields
Measurement
Measurement methods
Metal detectors
Methods
Spatial distribution
wireless power transfer system
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Summary:In an inductive wireless power transfer (WPT) system, the transferred power depends on the coupling between the transmitter coil and the receiver coil and, consequently, on their spatial positioning with respect to each other. Since this positioning needs to be as flexible as possible, one can design various construction shapes for the coils, in terms of both winding geometry and core geometry. The system efficiency for different positionings and configurations can be assessed if the structure and distribution of the electromagnetic field (EMF) in the space close to the system are determined. In this context, this paper proposes an investigation method based on measuring the intensity of the electromagnetic field generated by the emitting coil in the WPT space in terms of both modulus and direction. The measurements needed to be performed at a sufficient number of points, so that the entire field was determined. The EMF value was estimated by linear spatial interpolation between the measured points. Moreover, this paper presents the method and the results of investigations carried out only in the presence of the emitting coil. Calibration or correction solutions were also proposed to obtain sufficient accuracy, and the viability of the method was therefore demonstrated.
ISSN:2076-3417
2076-3417
DOI:10.3390/app13095773