一种用于振动自供能的能量存储和电源管理电路

power storage and management circuit of a self-powered vibration energy harvester is designed in this paper to solve the problem of the low output power of the harvester which leads to the failure of driving a wireless sensor directly. Based on the principles of tuning and impedance conversion, the impedance match of the energy harvester is realized; the super capacitor for storage is charged with maximum power; and the charging and discharging characteristics are researched theoretically and experimentally. The results show that the output power of the vibration energy harvester and the efficiency of its charging to the super capacitor are significantly improved. When the voltage across the 0.47F super capacitor has been charged to 0.6V, the super capacitor will discharge instantly through the instantaneous discharging circuit to drive the wireless sensor with a maximum power consumption of 75mW.