T08.9 - Detailed Circuit Modeling of Phone Charging Wireless Power Transfer

On-Demand

Location: Social27 Virtual Conference Platform

Technical Session - Lecture Presenter(s)

Ruben Specogna
University of Udine

Author(s)

Stefano Saggini
Università di Udine DPIA
Liyu Yang
Google LLC
Mario Ursino
University of Udine
Liang Jia
Google Hardware Power
Federico Iob
University of Udine
Li Wang
Google LLC
Qi Tian
Google LLC
Srikanth Lakshmikant
Google LLC

This paper proposes an innovative simulation software-based approach for wireless power transfer circuit modeling. The main characteristic of the methodology is the extraction of an equivalent circuit for a given positioning of the coils with is possible a precise estimation of the losses. An important feature of the modeling is the estimation of the type of loss (conduction, eddy current and core) and their location (TX/RX winding or TX/RX core). All power losses will be represented as power dissipated by resistors present in the circuit model generated by the software. The modeling approach is tested by the comparison of loss prediction with the measurements of a 10W wireless power transfer system in alignment and misalignment condition of the coils.