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首页> 外文期刊>Biomedical Circuits and Systems, IEEE Transactions on >Design and Optimization of Resonance-Based Efficient Wireless Power Delivery Systems for Biomedical Implants
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Design and Optimization of Resonance-Based Efficient Wireless Power Delivery Systems for Biomedical Implants

机译：基于共振的生物医学植入物高效无线供电系统的设计和优化

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摘要

Resonance-based wireless power delivery is an efficient technique to transfer power over a relatively long distance. This technique typically uses four coils as opposed to two coils used in conventional inductive links. In the four-coil system, the adverse effects of a low coupling coefficient between primary and secondary coils are compensated by using high-quality ($Q$) factor coils, and the efficiency of the system is improved. Unlike its two-coil counterpart, the efficiency profile of the power transfer is not a monotonically decreasing function of the operating distance and is less sensitive to changes in the distance between the primary and secondary coils. A four-coil energy transfer system can be optimized to provide maximum efficiency at a given operating distance. We have analyzed the four-coil energy transfer systems and outlined the effect of design parameters on power-transfer efficiency. Design steps to obtain the efficient power-transfer system are presented and a design example is provided. A proof-of-concept prototype system is implemented and confirms the validity of the proposed analysis and design techniques. In the prototype system, for a power-link frequency of 700 kHz and a coil distance range of 10 to 20 mm, using a 22-mm diameter implantable coil resonance-based system shows a power-transfer efficiency of more than 80% with an enhanced operating range compared to $thicksim 40%$ efficiency achieved by a conventional two-coil system.
机译：基于谐振的无线电力传输是一种有效的技术，可以在相对较长的距离上传输功率。与常规感应链路中使用的两个线圈相反，该技术通常使用四个线圈。在四线圈系统中，初级线圈和次级线圈之间耦合系数低的不利影响可以通过使用高质量（$ Q $）系数线圈来补偿，从而提高了系统的效率。与它的两线圈线圈不同，功率传输的效率曲线不是工作距离的单调递减函数，并且对初级线圈和次级线圈之间的距离变化不太敏感。可以优化四线圈能量传输系统，以在给定的工作距离下提供最大效率。我们分析了四线圈能量传输系统，并概述了设计参数对功率传输效率的影响。给出了获得高效功率传输系统的设计步骤，并提供了一个设计实例。概念验证原型系统得以实施，并证实了所提出的分析和设计技术的有效性。在原型系统中，对于700 kHz的电源链路频率和10至20 mm的线圈距离范围，使用直径为22 mm的可植入线圈共振为基础的系统显示出超过80％的功率传输效率，并且与传统的两线圈系统相比，效率提高了40％。

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