Journal Article10.1109/TPEL.2011.2143730
Design and Optimization of Circular Magnetic Structures for Lumped Inductive Power Transfer Systems
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TL;DR: In this article, 3-D finite-element analysis modeling is used to optimize circular power pads for electric vehicles to transfer 2-5 kW with a large air gap and have good tolerance to misalignment.
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Abstract: A solution that enables safe, efficient, and convenient overnight recharging of electric vehicles is needed. Inductive power transfer (IPT) is capable of meeting these needs, however, the main limiting factor is the performance of the magnetic structures (termed power pads) that help transfer power efficiently. These should transfer 2-5 kW with a large air gap and have good tolerance to misalignment. Durability, low weight, and cost efficiency are also critical. 3-D finite-element analysis modeling is used to optimize circular power pads. This technique is viable, since measured and simulated results differ by 10% at most. A sample of power pads was considered in this work, and key design parameters were investigated to determine their influence on coupled power and operation. A final 2 kW 700-mm-diameter pad was constructed and tested having a horizontal radial tolerance of 130 mm (equivalent to a circular charging zone of diameter 260 mm) with a 200 mm air gap. The leakage magnetic flux of a charging system was investigated via simulation and measurement. The proposed pads meet human exposure regulations with measurement techniques specific by the Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) which uses the International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines as a foundation.
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Citations
Topology Optimization of Magnetic Couplers for Wireless Power Transfer Considering Electromagnetic Shields
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- 01 Oct 2019
TL;DR: This paper presents topology optimization of magnetic couplers for wireless power transfer (WPT) device considering electromagnetic shields, and it is shown that the optimized coupler outperforms the conventional coupler.
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Optimized Design of a Wireless Charger Prototype for an e-Scooter
TL;DR: In this article , the authors present a comprehensive approach that addresses the design of the coil topology, the dimensions of the ferrite tiles, the definition of the gap and the optimised control for a CC-CV charge.
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Design and research of a double-sided flux coupler in inductive power transfer system
Wen-Jing Li,Jianghua Lu,Guorong Zhu,Wei Zhang,Jing Jiang +4 more
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TL;DR: A solenoid single D (SDD) coil is proposed to have a good interoperability with the double D (DD) coil and the unipolar coil to ensure high power transfer efficiency in IPT systems.
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Improvement of the efficiency of MISO configuration in inductive power transmission in case of coils misalignment
Bilel Kallel,Olfa Kanoun,Thomas Keutel,Christian Viehweger +3 more
- 12 May 2014
TL;DR: Investigations show that MISO orientated system has a better performance to transfer power over a bigger distance and achieve high efficiency in case of lateral misalignment between the sending and the receiving coils.
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A Combined Rectangular/Circular Power Pad for Electric Vehicles Wireless Charging
Marwan H. Mohammed,Yasir M. Y. Ameen,Ahmed Mohamed +2 more
- 07 Apr 2021
TL;DR: In this article, a Rectangular/Circular (RC) charging pad is proposed to integrate the traditional rectangular and circular charging pad structures, which is compared to the double-D (DD) pad in terms of the misalignment effect and coupling coefficient.
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Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz)
TL;DR: The International Commission on Non-Ionizing Radiation Protection (ICNIRP)—was established as a successor to the IRPA/INIRC, which developed a number of health criteria documents on NIR as part of WHO’s Environmental Health Criteria Programme, sponsored by the United Nations Environment Programme (UNEP).
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Design considerations for a contactless electric vehicle battery charger
TL;DR: This paper overviews theoretical and practical design issues related to inductive power transfer systems and verifies the developed theory using a practical electric vehicle battery charger.
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Magnetic Resonant Coupling As a Potential Means for Wireless Power Transfer to Multiple Small Receivers
TL;DR: In this paper, the magnetic resonance coupling between source and load coils is achieved with lumped capacitors terminating the coils, and a circuit model is developed to describe the system with a single receiver and extended to describe two receivers.
Stability and control of inductively coupled power transfer systems
John T. Boys,Grant A. Covic,A.W. Green +2 more
- 01 Jan 2000
TL;DR: In this paper, inductively coupled power transmission (ICPT) is used for transferring power from an extended loop (track) to a number of galvanically isolated movable pickup coils.
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A new generation of universal contactless battery charging platform for portable consumer electronic equipment
Shu Yuen Ron Hui,W.W.C. Ho +1 more
- 20 Jun 2004
TL;DR: In this paper, a planar inductive battery charger for portable electronic equipment such as mobile phones, palm pilots and CD players is proposed, which can generate magnetic flux of almost even magnitude over the surface of the winding arrays.
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