Selection of Optimal Operation Regime for Resonant Wireless Power Transfer System

Abstract

newlineBeing a convenient, cordless, handand#8208;free, safe, reliable, and suitable for alland#8208;weather conditions, wireless power transfer (WPT) system has been fetched to the forefront for charging the electrical and electronic appliances. Although resonant inductively coupled WPT system has been designed and developed for wireless powering/charging but a comprehensive elucidation is extremely important to withstand non-ideal practical scenarios without any deterioration of optimum power transfer which is a major concern. Therefore, the research interest has been laid to make the WPT system more viable by illuminating an operating regime for which maximum power transfer can be occurred. The innovative work carried out in the thesis addresses the impact of functioning parameters on maximum power transfer of resonant inductive link that holds the promise for future wireless charging. In-depth analyses, simulations using mathematical equivalent electrical circuit models and experimental measurements and practical demonstrations have been delineated in order to get hold an effective resonant WPT system for charging consumer appliances devices. A systematic study has been conducted and the impacts of functioning parameters such as coil configuration, separation air gap including vertical and horizontal coil offsets, coupling coefficient between coils, driving frequency as well as electric load on wireless power transfer process have been unveiled. The correlation between the system power delivery ability with the operating frequency as well as coupling coefficient under different electric load conditions has been outlined. Consequently, optimal solution has been explored correlating each functioning parameters to uphold maximum wireless power transfer without affecting the other associated design parameters. The effectiveness of the proposed condition has been analyzed. It has also been ventured that rather changing the other design parameters the maximum power transfer still can be maintained only by appropriately selecting the position of receiver coil in a WPT system. The corroborated experimental and simulation results with appropriate elucidation will be helpful in providing design strategies for forthcoming resonance based WPT system with maximum power delivery ability. By executing the developed and optimized resonant inductively coupled wireless power transfer system the practical battery charging has been fruitfully demonstrated.