Journal ArticleDOI
Inductive Power Transfer Efficiency Limit of a Flat Half-Filled Disc Coil Pair
TLDR
In this article, the authors derived the efficiency limit for an inductive power transfer between two flat half-filled disc coils based on a model for the eddy current losses in the coils and the losses due to electromagnetic radiation.Abstract:
The efficiency limit for an inductive power transfer between two flat half-filled disc coils is derived based on a model for the eddy current losses in the coils and the losses due to electromagnetic radiation. Analytic approximations for the coupling factor of the coils and eddy current losses are proposed and experimentally verified. It is shown that the approximative terms allow us to express the maximum efficiency of the coil pair analytically. If the strand diameter of the coil is sufficiently small, the efficiency depends only on the strand diameter, diameter of the coils, and the gap between the coils—but not on the operating frequency. Therefore, increasing the frequency does not result in higher efficiency but allows to reduce the coil thickness.read more
Citations
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Journal ArticleDOI
Effective-Configuration WPT Systems for Drones Charging Area Extension Featuring Quasi-Uniform Magnetic Coupling
TL;DR: This article presents a quasi-uniform magnetic coupling-based effective-configuration wireless power transfer (WPT) system for drones wider-area charging with multiple extended transmitter coils that enables cost-effective charging area extension and assists to sense the position of drones.
Heat Transfer Thermal Management Of Electronics
TL;DR: The heat transfer thermal management of electronics is universally compatible with any devices to read and is available in the book collection an online access to it is set as public so you can download it instantly.
Journal ArticleDOI
Single-Turn Air-Core Coils for High-Frequency Inductive Wireless Power Transfer
Grayson Zulauf,Juan Rivas-Davila +1 more
TL;DR: In this article, the authors used finite element analysis to optimize the cross section of single-turn air-core inductors for high-frequency and very-high-frequency industrial, scientific, and medical (ISM) applications.
Journal ArticleDOI
Optimisation of planar rectangular coil achieving uniform magnetic field distribution for EV wireless charging based on genetic algorithm
TL;DR: In this article, a planar rectangular coil with unevenly spaced turns is proposed for improving the uniform magnetic field distribution over the charging zone, together with the genetic algorithm for determining the geometric parameters of the coil structure.
Journal ArticleDOI
A Cost-Effective Segmented Dynamic Wireless Charging System With Stable Efficiency and Output Power
TL;DR: In this paper , a cost-effective dynamic wireless power transfer (DWPT) system for efficient and stable output power charging of autonomous moving equipment is realized based on a low-cost segmented configuration and a flexible operating strategy.
References
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Journal ArticleDOI
Wireless Power Transfer via Strongly Coupled Magnetic Resonances
Andre B. Kurs,Aristeidis Karalis,Robert Moffatt,John D. Joannopoulos,Peter H. Fisher,Marin Soljacic +5 more
TL;DR: A quantitative model is presented describing the power transfer of self-resonant coils in a strongly coupled regime, which matches the experimental results to within 5%.
Book
Microwave antenna theory and design
TL;DR: This book discusses microwave antenna design problems, circuit relations, reciprocity theorems, and antenna measurements - techniques.
Proceedings Article
Limitation of inductive power transfer for consumer applications
TL;DR: In this article, the authors derived the matching conditions for optimal power efficiency for inductive power transmission structures with varying distance and size ratios and investigated the achievable power efficiency of a given structure with respect to resonant matching and load impedance.
Journal ArticleDOI
Modeling and $\eta $ - $\alpha $ -Pareto Optimization of Inductive Power Transfer Coils for Electric Vehicles
Roman Bosshard,Johann W. Kolar,J. Muhlethaler,Ivica Stevanovic,Bernhard Wunsch,Francisco Canales +5 more
TL;DR: In this paper, the authors describe the optimization of inductive power transfer (IPT) coil systems with respect to efficiency and area-related power density as required in electric vehicle applications.
Journal ArticleDOI
Multi-Objective Optimization of 50 kW/85 kHz IPT System for Public Transport
Roman Bosshard,Johann W. Kolar +1 more
TL;DR: In this article, the authors present the design of a 50 kW/85 kHz contactless EV charger, with a focus on the IPT transmitter and receiver coils, which reveals the Pareto tradeoffs and performance limitations in terms of high efficiency, high power density, and low stray field for high-power IPT systems without moving mechanical parts.