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
Dynamic Wireless Power Transfer System With an Extensible Charging Area Suitable for Moving Objects
TL;DR: In this article, an extension of magnetic resonance coupling-based wireless power transfer (WPT) system is presented, where a transmitter (Tx) containing an 8-shape loop and two resonators is proposed to construct a bipolar Tx array.
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Transfer-Power Measurement Using a Non-Contact Method for Fair and Accurate Metering of Wireless Power Transfer in Electric Vehicles
TL;DR: In this article , the authors present a fair way to measure the power transfer in WPT by employing non-contact, open-circuited sense coils to calculate the real power propagating through the air gap between the transmitter and receiver coils.
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Effect of ferrite addition above the base ferrite on the coupling factor of wireless power transfer for vehicle applications
TL;DR: In this paper, the effect of adding extra ferrite above the base ferrite at different physical locations on the self-inductance, mutual inductance, and coupling factor is investigated.
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Loss Analysis of Circular Wireless EV Charging Coupler
Shuo Wang,David G. Dorrell +1 more
TL;DR: In this article, the analysis of a circular coupler with ferrite bar cores was presented, and the analysis was carried out using finite element analysis in ANSYS Maxwell and the copper loss assumed the use of Litz wire.
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Analysis of mutually decoupled primary coils for IPT systems for EV charging
Seho Kim,Abiezer Tejeda,Grant A. Covic,John T. Boys +3 more
- 01 Sep 2016
TL;DR: In this paper, an analytical model of an IPT system composed of a two coil primary pad and a single coil secondary pad is presented to show the importance of mutually decoupled coils in IPT systems using multi-coil primary pads.
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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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