Scalability analysis of SIMO non-radiative resonant wireless power transfer systems based on circuit models

Abstract

Resonant Inductive Coupling Wireless Power Transfer is a leading field of research due to the growing number of applications that can benefit from this technology: from biomedical implants to consumer electronics, fractionated spacecraft and electric vehicles, amongst others. However, applications are currently limited to point-to-point-links and do not target Single Input — Multiple Output (SIMO) scenarios. New challenges and applications of Resonant Non-Radiative Wireless Power Transfer emphasize the necessity to explore, predict and assess the behavior of RIC-WPT in SIMO links. Moreover, new systemlevel metrics have to be derived to study the scalability of SIMO Wireless Power Transfer applications and to provide design guidelines for these systems. In this article a Single Input — Multiple Output RIC-WPT System is modeled analytically from a circuit-centric point of view and validated using a Finite Element Field Solver (FEKO). The analytical model and associated closed formulation is finally used to derive system-level metrics to predict the behavior and scalability of RIC SIMO Systems and the results are showcased for an assymetric SIMO scenario.