Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1787468 | Current Applied Physics | 2011 | 4 Pages |
Planar spirals offer a highly scalable geometry appropriate for wireless power transfer via strongly coupled inductive resonators. We numerically derive a set of geometric scale and material independent coupling terms, and analyze a simple model to identify design considerations for a variety of different materials. We use our model to fabricate integrated planar resonators of handheld sizes, and optimize them to achieve high-Q factors, comparable to much larger systems, and strong coupling over significant distances with approximately constant efficiency.
► Coupled planar spirals are a highly scalable design for Wireless Power Transfer. ► We numerically derive scale and material independent coupling terms. ► Optimized designs obtained from coupling terms and spiral model. ► We build high quality handheld size coupled spirals. ► Power transfer efficiency roughly constant in strong coupling regime.