A Wireless Power Transfer System Based on a Hybrid Transmitting Coil for Targeted Therapy Microrobots in the Intestine
A Wireless Power Transfer System Based on a Hybrid Transmitting Coil for Targeted Therapy Microrobots in the Intestine
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DOI：
10.1007/s12541-023-00805-8
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发表时间：
2023-04
影响因子：
1.9
通讯作者：
Ding Han;G. Yan;Zhiwu Wang;Pingping Jiang;Lin Yan
中科院分区：
文献类型：
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作者：
Ding Han;G. Yan;Zhiwu Wang;Pingping Jiang;Lin Yan
用于靶向治疗微型机器人的无线电力传输系统最近受到更多关注。然而，由于发射线圈和接收线圈之间的位置和角度未对准而导致耦合弱，因此通常无法工作。即使它发生在某些角度，也是不能容忍的。为了解决这个问题，提出了一种三维混合发射线圈，结合了固定亥姆霍兹线圈对和可调弯曲矩形线圈对。基于这种新颖的结构，所提出的混合发射线圈可以产生三维磁场，实现与嵌入在任何姿势的微型机器人上的接收线圈的良好耦合。为了验证本文提出的发射线圈的效率和实际适用性，我们通过解析计算和仿真分析建立了线圈模型。最后，设计的混合发射线圈也在带有接收线圈的无线电力传输系统中实现。磁场分布表明可以获得大且均匀的磁场。实验结果表明，在发射线圈中心区域300×200 mm处，磁场分布均匀，能够满足微型机器人系统工作区域的要求。最大输出效率和功率分别可达 5% 和 1001 mW。此外，所提出的混合发射线圈解决了由于位置和角度失准导致电磁能快速衰减的弱耦合问题。
A wireless power transfer system for targeted therapy microrobots has been received more attention recently. However, it usually fails to work due to weak coupling caused by misalignment in position and angle between the transmitting coil and the receiving coil. It will not be tolerated even if it occurs at certain angles. To address this issue, a three-dimensional hybrid transmitting coil, combining a fixed Helmholtz coil pair and an adjustable curved rectangular coil pair, is proposed. Based on the novel structure, the proposed hybrid transmitting coil could produce a three-dimensional magnetic field, realizing well coupled with the receiving coil embedded on the microrobot at any posture. To verify the efficiency and practical applicability of the transmitting coil proposed in this paper, we build the coil model via both analytical calculation and simulation analysis. Finally, the designed hybrid transmitting coil is also implemented in the wireless power transfer system with a receiving coil. The magnetic field distribution indicates that a large and uniform magnetic field could be obtained. The experimental results demonstrate that in the central zone of the transmitting coil, 300 × 200 mm, the magnetic field distribution is uniform, which can meet the requirements of the microrobot system working area. And the maximum output efficiency and power can be reached at 5% and 1001 mW, respectively. What's more, the proposed hybrid transmitting coil has solved the weak coupling problem due to misalignment in position and angle with which the electromagnetic energy decays quickly.