This thesis investigates IPT technologies for achieving highly efficient wireless charging of EVs. To achieve wide-range output power regulation and maintain high transfer efficiency across a broad operating range, modulation and control techniques for power converters and compensation networks are explored. The research begins by addressing several key technical challenges in wireless EV charging. Based on these challenges, four research questions are introduced. Subsequently, the thesis is divided into three parts (encompassing five chapters in total) to address these questions, focusing on hybrid modulation and control, parameter identification and impedance tuning, and variable DLCC compensation.