Ng David C, Skafidas Efstratios
Annu Int Conf IEEE Eng Med Biol Soc. 2013;2013:3250-3. doi: 10.1109/EMBC.2013.6610234.
Inductive links are used in various applications to transfer power and data wirelessly. To achieve optimal performance in terms of voltage gain and maximum power transfer, these links are often operated at high coupling regime or under resonant frequency condition. However, these conditions may vary due to variations in the link itself or load. As a result, the link performance drops and the design of driving circuit become more complicated in order to compensate for the reduction in performance. In this work, we investigate an inductive link that has constant coupling. The tradeoff for invariant coupling is a reduction in coupling coefficient. In this study, we found that a reduction of 66 % exist between the traditional inductive link and our design. However, the advantage of coupling invariance outweighs the negative effect of large coil separation and varying conditions of a traditional one-pair coil link. The new link has the potential for powering a retinal implant.
电感式链路被用于各种应用中以无线传输功率和数据。为了在电压增益和最大功率传输方面实现最佳性能，这些链路通常在高耦合状态或谐振频率条件下运行。然而，由于链路本身或负载的变化，这些条件可能会有所不同。结果，链路性能下降，并且驱动电路的设计变得更加复杂，以便补偿性能的降低。在这项工作中，我们研究了一种具有恒定耦合的电感式链路。不变耦合的代价是耦合系数降低。在本研究中，我们发现传统电感式链路与我们的设计之间存在66%的降幅。然而，耦合不变性的优势超过了传统单对线圈链路大线圈间距和变化条件的负面影响。这种新链路具有为视网膜植入物供电的潜力。
