A Multiinput Bridgeless Resonant AC–DC Converter for Electromagnetic Energy Harvesting
A Multiinput Bridgeless Resonant AC–DC Converter for Electromagnetic Energy Harvesting
复制标题
用于电磁能量收集的多输入无桥谐振 AC-DC 转换器
DOI：
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发表时间：
2016
影响因子：
6.7
通讯作者：
A. Khaligh
中科院分区：
文献类型：
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作者：
Yichao Tang;A. Khaligh
研究了扑动电磁簧片发电机，即使在低截止风速下也能收集风能。电力电子接口旨在解决单通道或多通道系统的交流-直流转换和功率调节问题。然而，在低风速下，每个发电机簧片的产生电压通常低于电力电子半导体器件的阈值电压，这增加了整流的难度和低效率，特别是在输出功率相对较低的情况下。本文提出了一种多输入无桥谐振式交直流变换器，用于实现多通道电磁能量采集系统的交直流转换、升压和匹配最优阻抗。每个发电机的交流电压通过开关LC网络升压，然后由自由旋转二极管整流。其谐振操作提高了效率，并通过高频开关实现小型化。通过谐振阻抗匹配和脉冲调频控制可以调节最佳电阻抗。一个5厘米× 3厘米，六输入的独立原型被制造出来，以解决六通道风面板的功率调节问题。
Flapping electromagnetic-reed generators are investigated to harvest wind energy, even at low cutoff wind speeds. Power electronic interfaces are intended to address ac-dc conversion and power conditioning for single- or multiple-channel systems. However, the generated voltage of each generator reed at low wind speed is usually below the threshold voltage of power electronic semiconductor devices, increasing the difficulty and inefficiency of rectification, particularly at relatively low output powers. This paper proposes a multiinput bridgeless resonant ac-dc converter to achieve ac-dc conversion, step-up voltage and match optimal impedance for a multichannel electromagnetic energy harvesting system. Alternating voltage of each generator is stepped up through the switching LC network and then rectified by a freewheeling diode. Its resonant operation enhances efficiency and enables miniaturization through high frequency switching. The optimal electrical impedance can be adjusted through resonance impedance matching and pulse-frequency-modulation control. A 5 cm × 3 cm, six-input standalone prototype is fabricated to address power conditioning for a six-channel wind panel.