Quasistatic Cavity Resonance for Ubiquitous Wireless Power Transfer


Matthew Chabalko (Disney Research Pittsburgh)
Mohsen Shahmohammadi (Disney Research Pittsburgh)
Alanson Sample (Disney Research Pittsburgh)


February 15, 2017

Wireless power delivery has the potential to seamlessly power our electrical devices as easily as data is transmitted through the air. However, existing solutions are limited to near contact distances and do not provide the geometric freedom to enable automatic and un-aided charging. We introduce quasistatic cavity resonance (QSCR), which can enable purpose-built structures, such as cabinets, rooms, and warehouses, to generate quasistatic magnetic fields that safely deliver kilowatts of power to mobile receivers contained nearly anywhere within. A theoretical model of a quasistatic cavity resonator is derived, and field distributions along with power transfer efficiency are validated against measured results. An experimental demonstration shows that a 54 m3 QSCR room can deliver power to small coil receivers in nearly any position with 40% to 95% efficiency. Finally, a detailed safety analysis shows that up to 1900 watts can be transmitted to a coil receiver enabling safe and ubiquitous wireless power.

Download Quasistatic Cavity Resonant Room Measured Dataset

Here, we include all data for reproducing the experimental validation curves of Fig. 4a–d of the PLOS One article entitled “Quasistatic Cavity Resonance for Ubiquitous Wireless Power Transfer”. This data set includes measured, simulated, and analytically computed electric and magnetic fields, as well as all S-parameter data for reproducing the efficiency curves of panels d and e in Fig. 4 of the article.  We further include a Comsol Multiphysics (.mph file) model that can be used for reproducing simulations for the QSCR designed and tested in the article.



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