Communication-Less Receiver-Side Resonant Frequency Tuning for Magnetically Coupled Wireless Power Transfer Systems
Communication-Less Receiver-Side Resonant Frequency Tuning for Magnetically Coupled Wireless Power Transfer Systems
复制标题
磁耦合无线输电系统无通信接收端谐振频率调谐
DOI：
10.1109/access.2023.3251987
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发表时间：
2023
期刊：
影响因子：
3.9
通讯作者：
Kentaro Matsuura;Daisuke Kobuchi;Yoshiaki Narusue;Hiroyuki Morikawa
中科院分区：
文献类型：
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作者：
Kentaro Matsuura;Daisuke Kobuchi;Yoshiaki Narusue;Hiroyuki Morikawa
在磁共振耦合无线功率传输(WPT)系统中，补偿谐振频率的偏差是至关重要的。因此，本研究提出了一种无通信的接收器侧谐振频率调谐方案，该方案在不与发射器通信的情况下补偿接收器中的电抗。该方案包括发送端的电感-电容-电容补偿拓扑和接收端的半桥电路，其工作相位被设置为与接收电流正交。谐振频率调谐可以通过调整施加到半桥电路的直流电压来实现，以最大化负载接收的功率。通过在200 kHzWPT系统上的实验，分析了该方案的电抗补偿能力。当二次电容偏离−20%~+20%时，该方案的效率降幅保持在6.7%以内，而在没有补偿的情况下，效率降幅最高可达33.3%。
Compensating for deviations in the resonant frequency is crucial in magnetic resonance coupling wireless power transfer (WPT) systems. Thus, this study proposes a communication-less receiver-side resonant frequency-tuning scheme that compensates for the reactance in the receiver without communicating with the transmitter. The proposed scheme comprises an inductor-capacitor-capacitor compensation topology at the transmitter and a half-bridge circuit at the receiver, whose operating phase is set to be orthogonal to the receiver current. Resonant frequency tuning can be achieved by adjusting the DC voltage applied to the half-bridge circuit to maximize the power received at the load. The reactance compensation ability of the proposed scheme is analyzed through experiments on a 200 kHz WPT system. When the secondary capacitance deviated from −20% to +20%, the efficiency degradation was maintained within 6.7% with the proposed scheme, whereas the efficiency degraded by up to 33.3% without compensation.