Dynamic Capabilities of Multi-MHz Inductive Power Transfer Systems Demonstrated With Batteryless Drones
Dynamic Capabilities of Multi-MHz Inductive Power Transfer Systems Demonstrated With Batteryless Drones
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DOI：
10.1109/tpel.2018.2871188
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发表时间：
2019-06-01
影响因子：
6.7
通讯作者：
Mitcheson, Paul D.
中科院分区：
文献类型：
--
作者：
Arteaga, Juan M.;Aldhaher, Samer;Mitcheson, Paul D.
本文介绍了一种多MHz感应功率传输（IPT）系统的设计，展示了用于非辐射无线功率传输的轻量化和节能解决方案。通过在没有电池的情况下为无人机供电来开发概念验证，该无人机可以在IPT发射器附近自由悬停。最具挑战性的方面是完整的系统级设计，以有效地提供不间断的功率流，同时允许可变的功率需求和高度可变的耦合因子。提出的解决方案包括设计轻质空心线圈，可以在不降低无人机空气动力学性能的情况下实现足够的耦合，以及在系统两端设计新开发的谐振电源转换器。在发射端，开发了一种负载无关的EF类逆变器，该逆变器可以驱动具有恒定电流幅度的发射线圈，并在整个操作范围内实现零电压开关;在接收端，使用了一种混合E类整流器，该整流器可以根据耦合和功率需求的大变化进行调谐。在演示中，无人机的运动范围受到7.5厘米尼龙绳的限制，该绳连接在发射线圈中心和无人机底部之间。IPT系统的设计，包括所有的功率转换级和IPT链路，进行了详细说明。提供的物理实现所需的性能和具体的实际考虑的结果。在耦合度为23%-5.8%的范围内，实现了60%的平均端到端效率。根据相关指南，还包括有关人体暴露于电磁场的相关模拟，以确保演示是安全的。本文附有一个视频，介绍拟议的IPT系统
This paper presents the design of a multi-MHz inductive power transfer (IPT) system showcasing lightweight and energy-efficient solutions for non-radiative wireless power transfer. A proof of concept is developed by powering a drone without a battery that can hover freely in proximity to an IPT transmitter. The most challenging aspect, addressed here for the first time, is the complete system-level design to efficiently provide uninterrupted power flow while allowing for variable power demand and highly variable coupling factor. The proposed solution includes the design of lightweight air-core coils that can achieve sufficient coupling without degrading the aerodynamics of the drone, and the design of newly developed resonant power converters at both ends of the system. At the transmitting-end, a load-independent Class EF inverter, which can drive a transmitting-coil with constant current amplitude and achieves zero-voltage switching for the entire range of operation, was developed; and at the receiving-end, a hybrid Class E rectifier, which allows tuning for large changes in coupling and power demand, was used. For the demo, the range of motion of the drone was limited by a 7.5 cm nylon string tether, connected between the center of the transmitting-coil and the bottom of the drone. The design of the IPT system, including all the power conversion stages and the IPT link, is explained in detail. The results on performance and specific practical considerations required for the physical implementation are provided. An average end-to-end efficiency of 60% was achieved for a coupling range of 23%-5.8%. Relevant simulations concerning human exposure to electromagnetic fields are also included to assure that the demo is safe, according to the relevant guidelines. This paper is accompanied by a video featuring the proposed IPT system