Journal of Research in Electrical Circuits and Systems ISSN: 3139-2059 (Online)

Authors: Dr. Ritesh K. Sharma, Dr. Ananya B. Ghosh

Abstract: Wireless power transfer (WPT) enables energy delivery without physical connectors, providing flexible, reliable, and safe solutions for consumer electronics, biomedical implants, electric vehicles, and IoT devices. The
effectiveness of WPT systems relies heavily on efficient and optimized circuit design, including resonant inverters, rectifiers, impedance matching networks, and control circuitry. This paper presents a detailed review of circuits used in WPT systems, emphasizing efficiency, stability, and scalability. Tables summarize key parameters, trade-offs, and performance metrics, while a 2D block diagram illustrates a typical WPT circuit architecture. Challenges such as misalignment, energy loss, and EMI are discussed, along with emerging trends in adaptive control, high-frequency design, and multi-device power transfer.

Keywords: Wireless power transfer, Resonant circuits, Rectifiers, Impedance matching, Power electronics, Efficiency optimization, Control circuits.