Development of 3D Structures of Coils for High Performance Wireless Power Transfer Systems

Problem Statement

Wireless power transfer (WPT) based on magnetic resonant coupling is an emerging technology in many industrial and consumer applications such as wireless battery charging systems for electrical vehicles and mobile phones.

The key component in a WPT system is a pair of physically separated but magnetically coupled resonant coils. The geometric structure of the coils must be carefully optimized so that their coupling coefficient can be increased for higher power transfer efficiency and capacity, which are two major concerns of WPT systems.

Objective

This project aims to enhance the resonant coils’ performance with more intricate geometric design through 3D printing. This project focuses on the geometric design methodology, optimization algorithm, 3D printed coil substrates, and a demonstration WPT system.

Four optimized coils of various inductances are designed and fabricated using 3D printed substrates and Litz wires to compare with the conventional spiral and helix coils.
Four optimized coils of various inductances are designed and fabricated using 3D printed substrates and Litz wires to compare with the conventional spiral and helix coils.

Key Benefits/Outcomes

  • A user-friendly coil design simulation software is developed.
  • Compared with conventional spiral and helix coils, the designed coils of this project achieve 20% average increase of coupling coefficient.

Potential Application

Wireless Power Transfer (WPT) system e.g. wireless battery charging for electric vehicles

Collaborator

Contacts

Mr. Marc Lee marc.lee@ntuitive.sg