Wireless Power Supply for Portable Devices

As consumer electronics, smartphones, biomedical implants, electric vehicles etc. become more pervasive, there needs to be a paradigm shift for overcoming regular charging and to lessen the dependency on batteries. Wireless Power Transfer (WPT) is poised to surmount traditional charging methods and usher in a new era of IoT (Internet of Things) devices. However, the current state of WPT is riddled with proximity issues, poor efficiency, mediocre transmission distances, excessive heat-up and design complexions. This research aims to enhance the efficiency and the effective transmission distance. A WPT system has been designed based on a mixed, LCC topology along with a highly-efficient Class-E Power Amplifier as the source. The overall transfer-link efficiency attained for the designed WPT system is 90.026%. A multi-dimensional coil hierarchy can further be adopted for the designed WPT system for achieving spatial freedom. Furthermore, several tests have been conducted to test the system’s overall feasibility and to enhance its performance even more.