Abstract:
Wireless Power Transfer (WPT) systems are key enablers of efficient and user-friendly Electric Vehicle (EV) charging by eliminating physical connectors. In this context, Printed Circuit Board (PCB) litz coils, which leverage automated manufacturing processes, provide a cost-effective and scalable alternative to traditional litz wires for reducing AC losses at high frequencies. However, accurately modeling the inductive characteristics of these coils remains challenging due to their complex geometries. This paper presents a partial inductance analysis method that enables efficient and accurate characterization of the self and mutual inductance of PCB litz coils. By discretizing complex conductor geometries into smaller segments, the method captures localized electromagnetic interactions and improves the prediction of inductive coupling and field distribution. The modeling workflow, implemented in MATLAB, has been validated through finite-element simulations using ANSYS Q3D, ANSYS Maxwell, and ANSYS HFSS. To further verify the approach, two prototype PCB litz coils were fabricated, and their inductance was measured. The hardware results agree with both HFSS simulations and the MATLAB model within 2%, demonstrating the effectiveness of the proposed method in accurately capturing the inductive behavior of PCB litz coils. This work facilitates optimized coil designs for future WPT applications.
See publication:
https://ieeexplore.ieee.org/document/11062268This publication pertains to:
Electrified RoadwaysPublication Authors:
- Haris Ahmed
- Regan Zane
- Abhilash Kamineni
- Yanghe Liu