Magnetic resonance coupling (MRC) based wireless power transfer (WPT) system is recognized as an efficient and promising technology for safe, convenient and elegant charging solution for various electronic portable devices. MRC technology helps in transferring power wirelessly from transmitter to receiver over larger distances. However in such loosely coupled systems, low power transfer efficiency is the major issue in comparison to conventional wired charging systems. The paper presents detailed analysis of power transfer efficiency between two independent coils separated by distance of 15 cm. The analysis involves an effect of coil geometrical dimensions on power transfer efficiency and mutual inductance between transmitter (TX) and receiver coils (RX). In addition, the investigations are further extended to analyze the role of shielding and effect of shielding geometry on power transfer efficiency and mutual inductance between the two coils. © 2016 IEEE.

Dinkar Prasad

Electrical Engineering

(SoE) School of Engineering

Kavitha M.

Bobba P.B.

<p>Shiv Nadar University is a comprehensive, multidisciplinary, research-focused, and student-centric University offering a full range of academic programs at the undergraduate, postgraduate and doctoral level. With state-of-the-art infrastructure, the University comprises of academic wings, sophisticated labs, international standard sports facilities, amphitheaters, auditorium, conference rooms and smart classrooms. The University&rsquo;s goal is to become internationally recognized for the quality of its research and creative endeavors and their applicability to improving quality of life, generating new insights and expanding the boundaries of human knowledge creativity. Committed to excellence in teaching, research and service, the University aims to serve the higher education needs of India and the world beyond.</p>

Shiv Nadar University

Effect of coil geometry and shielding on wireless power transfer system

2016 IEEE 7th Power India International Conference, PIICON 2016

Advancement in the VLSI industry has brought out the drastic demand for numerous electronic devices such as mobiles, notepads, and computers etc. Its long charging cables create an inconvenience for the users. To replace such cables, an elegant wireless charging technique has been introduced to the current electronic industry. In this paper, a universal wireless charging system (UWCS) is designed, in which two segmented coils are connected series in fashion by means of electronic switches. The UWCS, on the whole, is suitable for laptop application and a small part of its design is used for the mobile application. As per the load requirement, the switching conditions of UWCS gets automatically changes. In UWCS, misalignment is the recurrently occurring dispute which diminishes the coupling factor between transmitter and receiver pads. In such systems, selection of proper coil structure is the preliminary significant part of its design. In this paper, several coil structures are chosen and simulated under various misalignment cases. The misalignment's effect and the shape of coil structure on various parameters of the wireless charging system are detailed in the paper. In addition, the variation of magnetic fields between transmitter and receiver pads for distinct misalignment cases are observed and analyzed in this paper. Thus, this paper provides the better coil-structure for a feasible UWC system for mobile and laptop applications. © 2018 IEEE.

Proceedings of 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems, PEDES 2018

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