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A battery-free power management circuit (PMC) for an impact-type piezoelectric energy harvester for micro wind is presented in this paper. As the energy generated by micro wind is intermittent, sleep mode is adopted for the PMC to save power. A new energy sensing circuit is designed to detect the energy level generated by the piezoelectric cantilever and then to control the operation modes, sleep...
In this paper an important figure of merit is introduced and discussed with reference to electromagnetic vibration energy harvesters which are loaded by diode bridge rectifiers. It is called Harvester Ideal Utilization Factor. It precisely quantifies how close to the optimum the harvester is loaded. Such a figure of merit can be defined not only for electromagnetic but also for piezoelectric harvesters...
Vibrational energy harvesting is gaining more and more attentions recently due to increasing power demands for on-board and remote applications. Piezoelectric Zirconate Titanate (PZT) based cantilever structure is one of the popular forms for vibrational energy harvesting. However, due to its complex electromechanical characteristics, the energy harvesting still remains as a challenge. This paper...
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