A Review of Self-Compensated Wireless Power Transfer System

Self-compensated wireless power transfer (WPT) system that uses parasitic capacitance to achieve resonance has received significant attention in recent years. Due to the elimination of physical capacitors, self-compensated WPT system has a compact structure, low cost, high reliability, and high efficiency, which is considered as an efficient and innovative solution for practical applications like electric vehicles, biomedical implants, and wireless heating and charging. Therefore, it is useful to present a comprehensive review of the recent developments of self-compensated WPT systems and discuss their potential future advancements. In this paper, the state-of-the-art of capacitor-free self-compensated coil topologies of WPT systems are systematically reviewed. Their advantages and drawbacks are investigated and compared in detail to provide a guideline for designing the WPT system.