Coil designs of spatial wireless power transfer systems

• Main Author: Wang, Wenshuai
• Other Authors: Yun Yang
• Format: Thesis-Master by Coursework
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Engineering
• Online Access: https://hdl.handle.net/10356/175990
• Institution: Nanyang Technological University

Wireless Power Transfer (WPT) systems have instigated a revolutionary change in how power is delivered, eliminating the need for physical connections and improving the user experience. However, the traditional 2D WPT systems encounter limitations due to stringent alignment and proximity requirements between the transmitter and the receiver. This research delves into the realm of spatial wireless power transmission (WPT) systems, utilizing a novel combination of vertical and horizontal magnetic fluxes facilitated by surface currents. This innovative spatial framework aims to ensure adaptable power transmission regardless of the receiver's location. Central to this investigation is the design of the coil, a critical element for the efficiency of a Spatial WPT system. Circular coils are traditional, but due to occupancy space constraints, alternative geometries need to be explored. Therefore, this study will explore square and octagonal coil designs that fit typical home layouts while maintaining performance levels comparable to circular coils. Additionally, a hexagonal configuration is being considered as a practical compromise between ideal and practical geometries. The research process includes building prototypes and running simulations to evaluate performance in three-dimensional space. Drawing insights from design predictions, demonstration testing, resonant frequency tuning, and comprehensive analysis of simulation data, the goal is to balance transmission range, energy efficiency, and manufacturability. The ultimate goal is to develop a coil design that minimizes sensitivity to positioning while maximizing energy transfer efficiency. This research goes beyond the current limitations of 2D WPT systems and paves the way for the next generation of wireless charging technology. It foresees a future in which ubiquitous charging solutions will be widespread across a variety of fields, from the home to healthcare and beyond.