Xu, Chen
(2021)
Techniques of Wireless Power Transfer and Electric Field Energy Harvesting.
PhD thesis, University of Liverpool.
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Abstract
Wireless power transfer (WPT) has become one of the most promising technologies of power supply. Modern WPT systems require not only reliable power transmission but also high-efficiency propagation as well. For both the cost-effective and environmentally friendly purposes, Energy harvesting (EH) technology has attracted a lot of attentions, which can convert ambient energies in the environment into electrical energy. Especially, Electric field energy harvesting (EFEH) can provide reliable and stable power source for sensor networks. One big issue for WPT system is the misalignment. When the receiver part of WPT system is moved from its alignment position, the power transfer efficiency will drop rapidly. Meanwhile, limited working area is another problem for WPT system, extending the working area can significantly improve the performance of WPT system. Coils design is a possible method to solve those problems. For EFEH system, normally the power source has a large input impedance. The practical load for EFEH system normally requires low impedance and voltage. How to match the large input impedance at 50/60 Hz is still a big issue for EFEH system. Furthermore, the EFEH system also can be utilized to measure the voltage on the power line in theory. This work focuses on solving misalignment problems in the WPT system and high input impedance problems in the EFEH system.
| Item Type: | Thesis (PhD) |
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| Divisions: | Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 08 Feb 2022 16:24 |
| Last Modified: | 01 Jul 2023 01:30 |
| DOI: | 10.17638/03138707 |
| Supervisors: |
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| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3138707 |
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