Abstract

Overview

Wireless power transfer (WPT) is gaining popularity as it allows for the transfer of electrical energy without the need for physical cables, which is especially useful in environments where cables are impractical, hazardous, or restrictive.

Findings

• Designs for WPT systems were created at 10 kHz and 20 kHz frequencies, featuring 3.3 kW output power and measuring 50 cm × 50 cm.
• Efficiency was evaluated at 88.79% for the 10 kHz design with a 15 cm air gap and 92.74% for the 20 kHz design with a 17 cm gap.
• The study compared wireless power systems at different frequencies in terms of efficiency, cost, loss, and electromagnetic field distribution.
• According to IEEE and ICNIRP standards, the safety of human exposure to magnetic fields produced by these systems was assessed.
• It was found that proximity to the coils could be hazardous to human health.

Conclusion

This research highlights the need for detection systems that can identify the presence of living beings or objects near operational WPT systems to prevent health risks. Moreover, higher frequency systems generally produce a lower magnetic flux density, presenting a relative decrease in electromagnetic exposure.