- Title
- Impedance-matching-based maximum power tracking for magnetic field energy harvesters using active rectifiers
- Creator
- Li, Yong; Duan, Na; Liu, Zhaowei; Hu, Jiefeng; He, Zhengyou
- Date
- 2023
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/198638
- Identifier
- vital:19081
- Identifier
-
https://doi.org/10.1109/TIE.2022.3219064
- Identifier
- ISSN:0278-0046 (ISSN)
- Abstract
- Increasing the power harvested from magnetic field energy harvesters (MFEHs) without expanding their volumes is crucial. Conventional methods for improving power harvest, e.g., flux-shaping capacitor and transfer window alignment techniques, are not applicable under varying primary current and load conditions. To address this vital problem, in this article, we present a control strategy of MFEHs based on impedance-matching theory, which considers the nonlinear characteristic of magnetic energy sources and can track the maximum power under varying current and load conditions based on an active rectifier. A calculation formula is derived to determine the optimal initial operating point of the active rectifier circuit, which aims to adjust the equivalent impedance to achieve maximum power tracking. An experimental prototype is constructed to verify the effectiveness of the proposed method. It is found that the proposed method enhances the harvested power under different current and load conditions, particularly in deep saturation conditions. The experimental results show that the proposed MFEH can harvest an average power of 2.51 W on an 800
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Relation
- IEEE Transactions on Industrial Electronics Vol. 70, no. 10 (2023), p. 10730-10739
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- Copyright © 2022 IEEE
- Subject
- 40 Engineering; 46 Information and computing sciences; Active rectifier circuit; Magnetic field energy harvesters (MFEHs); Power improvement; Wireless sensor networks (WSNs)
- Reviewed
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