Design of a Capacitive Wireless Power Transfer System for Operation in Fresh Water
Design of a Capacitive Wireless Power Transfer System for Operation in Fresh Water
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DOI：
10.1109/tmtt.2018.2875960
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发表时间：
2018-12-01
影响因子：
4.3
通讯作者：
Nakata, Takuma
中科院分区：
文献类型：
--
作者：
Tamura, Masaya;Naka, Yasumasa;Nakata, Takuma
本文介绍了一种用于淡水作业的电容式无线电能传输系统的设计。这篇文章澄清了两个特殊的观点。一是k与kq乘积在频率上的表现，k表示耦合器中的耦合系数，kq乘积表示耦合器中k与q因子的乘积。二是淡水条件下通用电容式耦合器的设计方法。首先，从耦合器的等效电路出发，推导出k和kq乘积与频率的关系。并找出了提高KQ产品的关键因素。然后，阐明了KQ乘积最大时的设计参数具有最大的有效效率，并阐明了该设计方法的适用条件。通过实验，我们在20 mm的传输距离下获得了91.3%的效率。最后，使用我们在充电站上实现的耦合器，将电能无线传输到Lux传感器模块，并将测量数据无线传输到该模块。
This paper presents the design of a capacitive wireless power transfer system for operation in fresh water. This paper clarifies two particular points. One is the behavior of k and kQ product for the frequency; k means coupling coefficient in the coupler and kQ product means the product of k and Q-factor in the coupler. The other is the design method of the general capacitive coupler under fresh water. First, k is derived from the equivalent circuit of the coupler, and it is elucidated that k and kQ product are dependent on the frequency. The pivotal elements that improve kQ product are also found. Next, it is then clarified that the design parameters at maximum kQ product have the maximum available efficiency and we clarify the applicable condition for our design method. We achieved an efficiency of 91.3% at a transfer distance of 20 mm via experimentation. Finally, it is demonstrated that power is wirelessly transferred to the Lux sensor module using our coupler implemented on the charging station and that measured data are also wirelessly transferred to it.