Robust dynamic wireless power transfer based on parity-time symmetry
Abstract/Contents
- Abstract
- Wireless power transfer offers users the ability to access power provided by the electrical grid without the hindrance of power cables. The technology is gaining importance with the increasing number of mobile battery-powered devices we use in our everyday lives. Already, wireless inductive charging pads are commercially available for many devices, from electric toothbrush to smart devices and even electric vehicles. In many of these conventional wireless power transfer setups, their power and efficiency performance is sensitive to the relative movement of the device receiving power with respect to the power source. Thus, at present, wireless power transfer is largely restricted to the scenario of stationary charging. The ability to deliver robust and efficient dynamic wireless power transfer should open new application opportunities, from dynamic charging of electric vehicles travelling on roadways to powering electronic devices on the move. In this Thesis, we present our recent efforts in the development of a robust dynamic wireless power transfer scheme based on the concept of parity-time (PT) symmetry. In our PT scheme, power is provided to the system through an amplifier on the power source pad. This amplifier provides gain to the electromagnetic energy inside the system in balance with the loss contributed by the device's energy draw. This construction enables the system to reach a steady state where the electromagnetic field in the system oscillates at the steady state frequency that corresponds to the maximum transfer efficiency regardless of the transfer distance. The result is robust wireless power transfer that automatically self-adjusts as the transfer distance varies such that high transfer efficiency is maintained without the need of any external tuning circuit.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2020; ©2020 |
| Publication date | 2020; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Assawaworrarit, Sidhi |
|---|---|
| Degree supervisor | Fan, Shanhui, 1972- |
| Thesis advisor | Fan, Shanhui, 1972- |
| Thesis advisor | Fan, Jonathan Albert |
| Thesis advisor | Vuckovic, Jelena |
| Degree committee member | Fan, Jonathan Albert |
| Degree committee member | Vuckovic, Jelena |
| Associated with | Stanford University, Department of Electrical Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Sidhi Assawaworrarit. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2020. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2020 by Sidhi Assawaworrarit
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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