Advancements in inductive wireless power transfer: A comprehensive review

Wireless power transfer (WPT) systems offer promising solutions for charging electronic devices by eliminating the need for physical connectors. This paper provides a comprehensive review of the key aspects of WPT systems, including resonant inverter and rectifier topologies, control strategies, standards, electromagnetic field (EMF) safety protocols, and mechanisms for foreign object detection (FOD), living object detection (LOD), and metal object detection (MOD). Various resonant inverters and rectifier topologies, including their respective advantages and disadvantages, are analyzed. Control strategies for WPT systems are discussed in detail, with an emphasis on both direct and indirect control methods. Existing wireless charging standards, as well as EMF safety standards, are reviewed. Additionally, the significance of FOD and techniques for LOD and MOD are explored, underscoring their critical role in ensuring the safety and efficiency of WPT systems. This paper serves as a comprehensive guide for researchers and practitioners in the field of WPT, offering insights into key considerations and challenges in the development and implementation of WPT technology.