Portable battery charging circuits for enhanced magnetic resonance Wireless Power Transfer (WPT) system

Proceedings of the 2013 9th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME) Pub Date : 2013-06-24 DOI:10.1109/PRIME.2013.6603170

Hyun Jin Choi, Eun Hye Ahn, S. Park, J. Choi

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引用次数: 6

Abstract

In recent years there has been significant development in the field of consumer electronics and biomedical applications based on wireless power transfer technology. In this paper, we propose efficiency improvement method for magnetic resonance Wireless Power Transfer (WPT) at a particular frequency within ISM band, applying controlled Impedance Matching technique. The impedance matching network guides the system to maintain the resonance condition when distance between Transmitter (Tx) and Receiver (Rx) is varied, which results in high power transfer efficiency. Measured results with proposed scheme showed an average of 7.21% improvement in power efficiency for distance between 10cm to 100cm. In addition an on-chip high efficient power recovery scheme is designed and fabricated in Dongbu HiTek's (DBHs) 0.35μm BCD technology based on LOCOS 0.35μm CMOS process for portable battery recharging applications. A maximum overall efficiency be 70.2% was determined for the entire system. This work shows the potential of automatic adjustments of parameters, such as impedance, in order to maintain resonance frequency to attain the maximum power efficiency and also to make the device portable.

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增强磁共振无线电力传输(WPT)系统的便携式电池充电电路

近年来，基于无线传输技术的消费电子和生物医学应用领域取得了重大发展。本文提出了一种利用可控阻抗匹配技术提高ISM频段内特定频率下磁共振无线电力传输效率的方法。阻抗匹配网络引导系统在发射机(Tx)和接收机(Rx)距离变化时保持谐振状态，从而提高功率传输效率。测量结果表明，在10cm至100cm的距离内，功率效率平均提高7.21%。此外，基于LOCOS 0.35μm CMOS工艺，采用东部HiTek (DBHs) 0.35μm BCD技术，设计并制造了一种用于便携式电池充电应用的片上高效功率回收方案。整个系统的最大总效率为70.2%。这项工作显示了自动调整参数(如阻抗)的潜力，以保持共振频率以获得最大的功率效率，并使设备易于携带。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 2013 9th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME)

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