The first generation of the Qi wireless power transfer (WPT) standard, introduced in 2010, featured a diverse array of transmitter and receiver designs to enhance compatibility and encourage widespread adoption among manufacturers. This focus on interoperability led to the involvement of over 400 companies in the Wireless Power Consortium (WPC), contributing to a rapidly growing wireless power market over the past decade. Currently, the WPC is broadening the scope of WPT applications to include mid- and high-power uses, with capabilities reaching several kilowatts. Meanwhile, the Society of Automobile Engineers (SAE) has established standards for wireless charging of electric vehicles (EVs), accommodating power levels of up to tens of kilowatts. The authors advocate for a transition from prioritizing compatibility to optimizing performance, focusing on maximizing energy efficiency and reducing charging times. This shift is essential to meet the increasing power requirements of WPT applications. The paper highlights essential technologies pivotal for the transition to high-power wireless power transfer (HPWPT), which is critical for supporting battery electric vehicles (BEVs). As this technology continues to evolve each year, efforts for standardization and commercial collaborations have increased. Substantial research has advanced high-power charging, with new techniques and devices driving further developments. This review examines current high-power WPT systems, detailing the progress made in passive components, devices, subsystems, and methods that have facilitated higher power levels. Energy limitations are often perceived as significant barriers for wireless and mobile devices, with limited battery life hindering performance and posing challenges for large-scale sensor network deployment. However, wireless power transfer has recently emerged as a viable solution to address energy and lifespan constraints in sensor networks. This article reviews the evolution and recent breakthroughs in wireless power transfer, illustrating how these technologies can help alleviate energy challenges in sensor networks.
A Sat, study studied this question.