Investigating human exposure to a practical wireless power transfer system using and the effect about key parameters of dosimetry

Abstract

Overview

The study provides an in-depth analysis of dosimetry in practical wireless power transfer (WPT) systems employing electromagnetic resonance and induction. Understanding the electromagnetic fields created by these systems is crucial due to potential health risks.

Methodology

• Simulation and Experimental Approach: The research implements both circuit and electromagnetic simulations coupled with real-world experiments using an equivalent circuit model to measure and analyze the electromagnetic fields accurately.

Key Findings

The construction of the coils and their alignment play significant roles in the intensity of electromagnetic fields generated. Specifically:

• The strongest magnetic fields were observed under conditions including constant current mode, full charge state, and coil misalignment, with magnetic strength being 1.397 times greater at 80% charge with misalignment compared to 20% charge and alignment, closely measured from the transmission pad.

Conclusion

The findings highlight critical factors influencing the strength of magnetic fields in WPT systems. Moreover, the outcomes were compared with recommended values by international guidelines to confirm compliance, crucial for confirming safety standards against potential health risks from prolonged exposure.