A self-oscillating series-none inductive power transfer system using a matrix converter

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-04
Major/Subject
Mcode
Degree programme
Language
en
Pages
16
Series
Electrical Engineering
Abstract
Power density and conversion efficiency are two critical parameters of inductive power transfer (IPT) systems. These parameters are related to the number of components in the power conversion circuit as well as its modulation method. The combination of Midpoint Matrix Converter and pulse-density modulation (PDM) has a potential to improve these parameters, due to a low number of semiconductor switches utilization as well as constant efficiency at the maximum output and partial load operations. In this context, this paper analyzes the performance of a three-phase to single-phase Midpoint Matrix Converter using a Free-wheeling Switch (MMCFS) and the PDM in a high coupling factor series-none IPT application. This converter utilizes on–off control to manage power transfer, which automatically tracks the load resonant frequency. Dynamic and steady-state mathematical equations were derived to represent the converter and the IPT system characteristics. These equations show a relationship between the link efficiency, the link gain, the damping ratio and the coupling factor. A kick-start method and a multistep switching strategy were developed to start and operate the converter, respectively. Additionally, a 150 W MMCFS-based IPT prototype was built to verify the improvement, which demonstrated an efficiency of around 80% at the maximum output and partial load operations.
Description
Publisher Copyright: © 2023, The Author(s).
Keywords
AC–AC converter, DC resonant charging, Inductive power transmission, Matrix converter, On–off control, Pulse-density modulation, Resonant converter, Zero-current switching
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Citation
Kusumah, F P, Kyyrä, J & Martinez, W 2023, ' A self-oscillating series-none inductive power transfer system using a matrix converter ', Electrical Engineering, vol. 105, no. 2, pp. 797-812 . https://doi.org/10.1007/s00202-022-01698-y