The effect of matrix power repeaters on magnetic field distribution of IPT systems

Matrix power repeaters (MPRs) have been used in high frequency radio systems for enhancing the signal propagation, as well as wireless power transfer systems for extending the power transfer range. However, their effect on the magnetic field distribution of inductive power transfer (IPT) systems is...

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Bibliographic Details
Published in2017 IEEE Energy Conversion Congress and Exposition (ECCE) pp. 4383 - 4387
Main Authors Rong Hua, Hu, Aiguo Patrick, Ho Fai Leung
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2017
Subjects
Couplings
Magnetic Field Distribution Inductive Power Transfer
Magnetic fields
Matrix Power Repeaters
Permeability
Repeaters
Resonant frequency
Tuning
Voltage measurement
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Summary:Matrix power repeaters (MPRs) have been used in high frequency radio systems for enhancing the signal propagation, as well as wireless power transfer systems for extending the power transfer range. However, their effect on the magnetic field distribution of inductive power transfer (IPT) systems is still not clear. This paper presents both the positive and negative effects of MPRs for enhancing or reducing the magnetic field coupling in IPT systems. The magnetic field generated by the primary coil and MPRs of an IPT system has been investigated, and the relationship between the effective permeability of a typical MPR and the system operating condition is analysed. A CST (Computer Simulation Technology) model has been set up to simulate the magnetic field distribution, which has also been experimentally verified. Both simulation and experimental results have shown that the magnetic field is enhanced when the system operating frequency is below a critical frequency where the effective permeability of MPRs is -1, and reduced when the system operating frequency is above this critical frequency.
DOI:10.1109/ECCE.2017.8096754