Microwatt power consumption maximum power point tracking circuit using an analogue differentiator for piezoelectric energy harvesting
Microwatt power consumption maximum power point tracking circuit using an analogue differentiator for piezoelectric energy harvesting
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DOI：
10.1088/1742-6596/660/1/012022
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发表时间：
2015-12
期刊：
影响因子：
--
通讯作者：
Z. Chew;M. Zhu
中科院分区：
文献类型：
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作者：
Z. Chew;M. Zhu
提出了一种利用微分器跟踪压电能量采集器开路电压的最大功率点跟踪（MPPT）方法。该MPPT控制器是通过使用低功耗模拟微分器和比较器，而不需要一个感测电路和功耗控制器。该MPPT电路用于控制降压转换器，该降压转换器与全波桥式二极管整流器一起用作电源管理模块。最大功率跟踪控制方案的性能进行了验证，使用原型电路跟踪的最大功率点的宏纤维复合材料（MFC）的压电能量采集器。将MFC粘结在复合材料上，并使整个试样在10至100 Hz的频率下经受各种应变水平。实验结果表明，所实现的全模拟MPPT控制器的跟踪效率在81%~ 98.66%之间，与负载无关，在3V工作时的平均功耗为3.187 μW。
A maximum power point tracking (MPPT) scheme by tracking the open-circuit voltage from a piezoelectric energy harvester using a differentiator is presented in this paper. The MPPT controller is implemented by using a low-power analogue differentiator and comparators without the need of a sensing circuitry and a power hungry controller. This proposed MPPT circuit is used to control a buck converter which serves as a power management module in conjunction with a full-wave bridge diode rectifier. Performance of this MPPT control scheme is verified by using the prototyped circuit to track the maximum power point of a macro-fiber composite (MFC) as the piezoelectric energy harvester. The MFC was bonded on a composite material and the whole specimen was subjected to various strain levels at frequency from 10 to 100 Hz. Experimental results showed that the implemented full analogue MPPT controller has a tracking efficiency between 81% and 98.66% independent of the load, and consumes an average power of 3.187 μW at 3 V during operation.