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首页> 外文会议>International Conference on Adaptive Structures and Technologies; 20051009-12; Paris(FR) >EFFICIENCY OF A PIEZOELECTRIC ENERGY HARVESTING CIRCUIT FOR RECHARGEABLE BATTERIES
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EFFICIENCY OF A PIEZOELECTRIC ENERGY HARVESTING CIRCUIT FOR RECHARGEABLE BATTERIES

机译：充电电池的压电能量收集电路的效率

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摘要

Using piezoelectric materials to harvest energy from ambient vibration has been of great interest over the past few years. Because the power output of the piezoelectric materials is relatively low, rechargeable battery is considered as one kind of energy storage to accumulate the harvested energy for intermittent use. In order to optimize the harvesting efficiency, Ottman et al. applied a DC-DC converter in the battery-based piezoelectric energy harvesting circuit. Their energy harvesting scheme has shown considerable improvement in the harvesting efficiency. However, in their analysis, the converter was assumed as a 100% efficiency subsystem while the energy losses of the internal components were not considered. In this paper, we develop a converting theory based on the basic components of the converter. Efficiency of the converter is analyzed and discussed. Simulation results show that the converter efficiency is related to several parameters including the duty cycle of the control voltage and the voltage of the rechargeable battery. The harvested power could be improved by increasing the battery voltage if various rechargeable batteries are available.
机译：在过去的几年中，使用压电材料从环境振动中收集能量一直很受关注。由于压电材料的功率输出相对较低，因此可再充电电池被认为是一种能量存储装置，用于累积收集的能量以供间歇使用。为了优化收割效率，Ottman等人。在基于电池的压电能量采集电路中应用了DC-DC转换器。他们的能量收集方案在收集效率上已显示出相当大的提高。但是，在他们的分析中，转换器被假定为效率为100％的子系统，而未考虑内部组件的能量损耗。在本文中，我们基于转换器的基本组件开发了一种转换理论。分析和讨论了转换器的效率。仿真结果表明，转换器效率与几个参数有关，包括控制电压的占空比和可充电电池的电压。如果可以使用各种可充电电池，则可以通过增加电池电压来提高收集的功率。

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