Three-Phase Time-Multiplexed Planar Power Transmission to Distributed Implants.
Three-Phase Time-Multiplexed Planar Power Transmission to Distributed Implants.
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DOI：
10.1109/jestpe.2015.2436391
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发表时间：
2016-03
影响因子：
5.5
通讯作者：
Ghovanloo M
中科院分区：
文献类型：
--
作者：
Lee B;Ahn D;Ghovanloo M
已经推出了一个平台，用于为大面积任意分布的接收器 (Rx) 进行无线供电。一个潜在的应用可能是为分布在大脑大片区域的小型 Rx 植入物提供动力。发射器 (Tx) 由三层重叠的六角形平面螺旋线圈 (hex-PSC) 组成，这些线圈水平移动以提供最强、最均匀的电磁通量覆盖。三层六角 PSC 阵列由三相时分复用功率 Tx 驱动，该功率 Tx 利用载波相移、线圈几何形状和 Rx 时间常数均匀地为任意分布的 Rx 供电，而不管它们是否未对准。所提出的三相电力传输概念的功能已在详细的放大高频结构模拟器高级设计系统仿真模型和测量设置中得到验证，并与传统的 Tx 进行了比较。新型 Tx 为每个 Rx 提供 5.4 mW 的功率，在最坏的 90° 角偏差情况下，平均可实现 5.8% 的 Rx 功率传输效率，而传统 Tx 的功率传输效率为 1.4%。
A platform has been presented for wireless powering of receivers (Rx's) that are arbitrarily distributed over a large area. A potential application could be powering of small Rx implants, distributed over large areas of the brain. The transmitter (Tx) consists of three overlapping layers of hexagonal planar spiral coils (hex-PSC) that are horizontally shifted to provide the strongest and most homogeneous electromagnetic flux coverage. The three-layer hex-PSC array is driven by a three-phase time-division-multiplexed power Tx that takes the advantage of the carrier phase shift, coil geometries, and Rx time constant to homogeneously power the arbitrarily distributed Rx's regardless of their misalignments. The functionality of the proposed three-phase power transmission concept has been verified in a detailed scaled-up high-frequency structure simulator Advanced Design System simulation model and measurement setup, and compared with a conventional Tx. The new Tx delivers 5.4 mW to each Rx and achieves, on average, 5.8% power transfer efficiency to the Rx at the worst case 90° angular misalignment, compared with 1.4% by the conventional Tx.