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A 50-kW Three-Phase Wireless Power Transfer System

更新时间:2020-11-07 16:05:48 大小:12M 上传用户:roye_yang查看TA发布的资源 标签:无线充电 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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—The mass and volume of wireless power transfer (WPT) systems for charging electric vehicles are directly related to the rated power of the system. The diffificulties of high-power wireless charging are exacerbated by the need to meet the same practical constraints associated with vehicle integration as lower power systems. Therefore, more advanced techniques are necessary to improve power density and specifific power of wireless charging systems for high-power applications. This article presents theory and analysis of three-phase inductive WPT systems with bipolar phase windings. Magnetic coupler topologies and the theoretical and practical aspects of series three-phase resonant compensation networks are discussed. The systems under consideration are designed to utilize rotating magnetic fifields to achieve a power transfer characteristic that is temporally smoother than singlephase systems. Other benefifits associated with rotating magnetic fifield based WPT, including reduced ferrite mass, fifilter component requirements, and electromagnetic fifield emissions, are discussed. Experimental results of a prototype system are presented in both aligned and misaligned confifigurations. The system is demonstrated transferring 50 kW with 95% dc-to-dc effificiency over a 150-mm airgap in the aligned case. On a per-pad basis, the magnetic couplers achieve a power density of 195 kW/m2 and a specifific power of 3.65 kW/kg. This article is accompanied by a video of the rotating magnetic fifield produced by a simulated three-phase WPT system.

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A_50-kW_Three-Phase_Wireless_Power_Transfer.pdf 12M

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