一种用于增强稳定性的植入式装置的闭环经皮功率传输系统

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512) Pub Date : 2004-05-23 DOI:10.1109/ISCAS.2004.1328929

Guoxing Wang, Wentai Liu, R. Bashirullah, M. Sivaprakasam, G. Kendir, Ying Ji, M. Humayun, J. Weiland

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引用次数: 51

摘要

本文介绍了一种用于植入式视网膜假体装置的闭环无线感应电力传输系统。所提出的系统旨在确保在线圈位移和负载电流变化的情况下向植入单元传输最佳功率，同时最大限度地减少对组件和工艺变化的敏感性。在系统建模的基础上，确定了系统的稳定性约束，并将其应用于反馈控制系统。该模型在确定元件值、电路拓扑和每个采样周期所需的传输位数以确保系统稳定性方面至关重要。此外，该模型显着减少了由冗长电路仿真引起的设计迭代。通过Matlab和SPICE级仿真对模型进行了验证。采用AMI 1.6 /spl μ m工艺设计制作了控制系统的关键模拟电路。

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A closed loop transcutaneous power transfer system for implantable devices with enhanced stability

This paper describes a closed-loop wireless inductive power transfer system for an implantable retinal prosthetic device. The proposed system is designed to ensure optimal power transfer to the implanted unit despite coil displacements and changes in load current while minimizing the sensitivity to component and process variation. Based on the system modeling, stability constraints are identified and applied to the feedback control system. The model is crucial in determining component values, circuit topology and number of transmitted bits per sampling period required to ensure system stability. In addition, the model significantly reduces design iterations compounded by lengthy circuit simulation. The model is verified by Matlab and SPICE level simulations. The critical analog circuits of the control system have been designed and fabricated through AMI 1.6 /spl mu/m process.

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来源期刊

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

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