Wide-range robust wireless power transfer using heterogeneously coupled and flippable neutrals in parity-time symmetry.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35704586.
- Also identified by DOI 10.1126/sciadv.abo4610 and PMC identifier 9200287.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Recently, stationary wireless power transfer (WPT) has been widely adopted in commercial devices. However, the current WPT configuration is limited in its operational area and susceptible to operating condition changes, impeding its applications for dynamic environments. To overcome the limitations, we propose a WPT system with laterally aligned neutral elements in parity-time (PT) symmetry, which can widen the operational area with the number of neutrals <i>N</i>. Compared to the conventional multiple-input-single-output WPT, the dimension of system complexity is substantially reduced from <i>R</i> × <i>C<sup>N</sup></i> to <i>R</i><sup><i>N+</i>1</sup> because the neutral amplitudes are simply controlled by coupling capacitors. The operational frequency is automatically adjusted to a real eigenvalue of the PT-symmetric system to achieve high voltage gain and efficiency, making the system robust. The performance of the system calculated by the coupled-mode theory was experimentally verified with rigid and flexible types of receivers, confirming its potential in both industrial and biomedical electronics.