一种使用商用射频识别收发器的闭环无线电力传输系统，用于生物医学应用。
A closed loop wireless power transmission system using a commercial RFID transceiver for biomedical applications.
作者信息
Kiani Mehdi, Ghovanloo Maysam
机构信息
School of Electrical and Computer Engineering at Georgia Institute of Technology, Atlanta, USA.
出版信息
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:3841-4. doi: 10.1109/IEMBS.2009.5332564.
This paper presents a standalone closed loop wireless power transmission system that is built around a commercial off-the-shelf (COTS) radio frequency identification (RFID) transceiver (MLX90121) operating at 13.56 MHz. It can be used for inductively powering implantable biomedical devices in a closed loop fashion. Any changes in the distance and misalignment between transmitter and receiver coils in near-field wireless power transmission can cause a significant change in the received power, which can cause either malfunction or excessive heat dissipation. RFID transceivers are often used open loop. However, their back telemetry capability can be utilized to stabilize the received voltage on the implant. Our measurements showed that the delivered power to the transponder was maintained at 1.48 mW over a range of 6 to 12 cm, while the transmitter power consumption changed from 0.3 W to 1.21 W. The closed loop system can also oppose voltage variations as a result of sudden changes in load current.
本文介绍了一种独立的闭环无线电力传输系统，该系统围绕一个工作在13.56MHz的商用现货（COTS）射频识别（RFID）收发器（MLX90121）构建。它可用于以闭环方式为可植入生物医学设备供电。在近场无线电力传输中，发射器和接收器线圈之间的距离和未对准的任何变化都会导致接收功率的显著变化，这可能导致故障或过度散热。RFID收发器通常以开环方式使用。然而，它们的反向遥测能力可用于稳定植入物上的接收电压。我们的测量表明，在6至12厘米的范围内，发送到应答器的功率保持在1.48毫瓦，而发射器功耗从0.3瓦变化到1.21瓦。闭环系统还可以抵抗负载电流突然变化引起的电压变化。
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