Low power implementation of maximum energy harvesting scheme for vibration-based electromagnetic microgenerators
Low power implementation of maximum energy harvesting scheme for vibration-based electromagnetic microgenerators
复制标题
基于振动的电磁微型发电机的最大能量收集方案的低功耗实现
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
L. Parsa
中科院分区：
文献类型：
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作者：
R. Dayal;L. Parsa
电磁微型发电机被广泛用作基于振动的能量收集装置。就像其他收集源一样，它们也可以通过控制提供给微型发电机的电阻来收集最大的能量。对于低功率，由于数字控制电路的开销功率成本，最大能量收集方案相当难以实现。在这项工作中，一个单级AC-DC转换器被用来提高微型发电机的低电压。提出了一种新的最大功率跟踪方案，该方案改变了转换器的占空比，以提供最佳电阻的微型发电机。该控制系统仅消耗几微瓦的功率，可以应用于低功率系统。相关的仿真和实验结果提供了验证所提出的方案。
Electromagnetic microgenerators are widely used as means for vibration-based energy harvesting. Just like other harvesting sources, they can also be operated to harvest maximum energy by controlling the resistance offered to the microgenerator. For low power, maximum energy harvesting scheme is quite difficult to implement due to the overhead power costs of the digital control circuits. In this work, a single stage AC-DC converter is utilized to boost the low voltage of the microgenerator. A novel maximum power tracking scheme is proposed which changes the duty cycle of the converter to offer optimum resistance to the microgenerator. The control system would only consume a few micro-watts of power and can be applied to low power systems. Relevant simulation and experimental results are provided to validate the proposed scheme.