High-frequency electromagnetic force characteristics on electromagnetic shielding materials in wireless power transmission system

Zhang, Xian; Yuan, Zhaoyang; Yang, Qingxin; Meng, Hao; Yao, Jin; Wang, Zhaohui; Jiang, Siyuan

doi:10.1109/wow.2017.7959369

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…There is another method for minimizing the magnetic materials in the system for flux controlling. This is [106,[124][125][126][127][128].some of the applications vehicle chassis taken as conductive material for shielding [129].Normally conductive shielding applied with ferrites to improve the magnetic field around the coils so it is called conductive passive shielding. As per SAE J2954 recommended dimensions for aluminum back plate is 800mmx800mmx0.7mm, applicable for the power ranges WPT1 to WPT3.…”

Section: Figure 22 Classification Of Emf Shieldingmentioning

confidence: 99%

Inductive Wireless Power Transfer Charging for Electric Vehicles–A Review

Bharatiraja²,

2021

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Considering a future scenario in which a driverless Electric Vehicle (EV) needs an automatic charging system without human intervention. In this regard, there is a requirement for a fully automatable, fast, safe, cost-effective, and reliable charging infrastructure that provides a profitable business model and fast adoption in the electrified transportation systems. These qualities can be comprehended through wireless charging systems. Wireless Power Transfer (WPT) is a futuristic technology with the advantage of flexibility, convenience, safety, and the capability of becoming fully automated. In WPT methods resonant inductive wireless charging has to gain more attention compared to other wireless power transfer methods due to high efficiency and easy maintenance. This literature presents a review of the status of Resonant Inductive Wireless Power Transfer Charging technology also highlighting the present status and its future of the wireless EV market. First, the paper delivers a brief history throw lights on wireless charging methods, highlighting the pros and cons. Then, the paper aids a comparative review of different type's inductive pads, rails, and compensations technologies done so far. The static and dynamic charging techniques and their characteristics are also illustrated. The role and importance of power electronics and converter types used in various applications are discussed. The batteries and their management systems as well as various problems involved in WPT are also addressed. Different trades like cyber security economic effects, health and safety, foreign object detection, and the effect and impact on the distribution grid are explored. Prospects and challenges involved in wireless charging systems are also highlighting in this work. We believe that this work could help further the research and development of WPT systems..

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Section: Figure 22 Classification Of Emf Shieldingmentioning

confidence: 99%

Inductive Wireless Power Transfer Charging for Electric Vehicles–A Review

Bharatiraja²,

2021

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“…((n addition, the EMF also produces noise pollution in the surrounding environment [17]. The characteristics of EMF on a ferromagnetic material in a WPT system were analyzed in reference [18], which only considered the receiver and did not obtain exact conclusions on the effects of the EMF on the WPT system.…”

Section: Classification and Model Of Emf In Wptmentioning

confidence: 99%

Characteristic Analysis of Electromagnetic Force in a High-Power Wireless Power Transfer System

Zhang

Wei

et al. 2018

Energies

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In order to explore the influence of the electromagnetic force (EMF) on the coupling mechanism in a high-power wireless power transfer (WPT) system, the characteristics of the EMF are investigated by theoretical calculation and simulation. The expressions of the EMF on the WPT structure with magnetic shielding are derived in time domain and frequency domain, respectively. The EMF is divided into Lorentz force and Kelvin force. The distribution and changing regularity of the EMF on the coil and the magnetic shield under different exciting currents are solved by the finite element model, and the harmonic of the EMF is analyzed in detail. The results show that the coil is subjected to the EMF in both radial and axial directions. The EMF on the magnetic shield is opposite to the EMF on the coil, and the force between the transmitting coil and the receiving coil is repulsive. The frequency of the EMF is twice that of the system resonant frequency. An experimental prototype is built to prove the correctness of the predicted characteristics. It is shown that the EMF should be carefully considered in the application of high-power WPT systems.

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“…In reference [18], a launch coil structure composed of three pairs of Helmholtz coils is designed to realize omnidirectional rotation of micro robot. In reference [15]- [16], the problem of EMF on WPT system is studied, and preliminary and clear conclusions are obtained. The coupling coil and shielding material are mainly affected by the EMF in the vertical direction, and the steady-state EMF on them is in the opposite direction and repels each other.…”

Section: Introductionmentioning

confidence: 99%

Structure Electromagnetic Force Analysis of WPT System Under Fault Conditions

Zhang

Wang

et al. 2020

IEEE Access

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In the high-frequency electromagnetic field, the coupling of the wireless power transfer (WPT) system is affected by the electromagnetic force (EMF). The fault conditions will strengthen the influence, cause the damage of magnetic shielding structure, coil deformation, insulation damage and so on. In order to ensure the safe and stable operation of the WPT system, it is necessary to study the local EMF distribution of the coupling mechanism under the fault condition of WPT system. In this paper, the series to series (SS) compensation structure is taken as an example to analyze the changes of electrical parameters of WPT system under typical faults, and determines that the open load fault has the greatest impact on the system. The WPT system with groove-shaped magnetic shield structure is selected as the research object. Establish a mathematical model for calculating the EMF of the WPT system combining the field-path coupling time-step finite element method and the Maxwell stress method, the distribution law of local EMF of magnetic shielding structure when the load is open is analyzed and calculated. At the same time, an experimental platform is built to verify the effectiveness of the method. According to the distribution characteristics of EMF, the smoothing scheme based on variable-turn-pitch planar coil is proposed. The new coil structure obtained by the SNOPT algorithm, compared with the equi-turn-pitch planar coil, the overall force on the coupling mechanism of transmitting end under the open circuit fault at the receiving end is reduced by 86.24%. This study provides a theoretical reference for the optimal design of coupling mechanism of WPT system.

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High-frequency electromagnetic force characteristics on electromagnetic shielding materials in wireless power transmission system

Cited by 5 publications

References 12 publications

Inductive Wireless Power Transfer Charging for Electric Vehicles–A Review

Inductive Wireless Power Transfer Charging for Electric Vehicles–A Review

Characteristic Analysis of Electromagnetic Force in a High-Power Wireless Power Transfer System

Structure Electromagnetic Force Analysis of WPT System Under Fault Conditions

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