压电振动式发电机微电源智能控制应用电路的设计

Design of the Smart Control Circuit Based on Vibration-based Piezoelectric Generator

针对压电振动式发电机、微型电磁感应发电机、驻极体发电机等微型发电机的发电功率较小,常规的整流滤波、存储、稳压电路不能满足瞬时发射功率较大的负载供电需求问题,提出一种微功耗的电源智能管理电路的设计方案,从而使持续的微能源得以合理而有效的利用。其主要由整流滤波电路、MOS开关及控制电路、存能电路、辅助能量补充回路和主控制电路等构成。这里以该电路在压电振动式发电机的应用为例。实验证明该电路自身的功耗只有40μw以下,能较好地满足微功耗电子器件、传感器或间歇式较大功耗无线传感网络供电的要求。

The mini- generators like vibration generator-based piezoelectric, mini- electromagnetism effect generator, electret generator and so on have low power,it is difficult to supply the load with high instantaneous power consumption in the way of the current rectifier, filter and storage capacitor control circuit. To solve the problem, the control circuit of low power consumption is contrived to manage the energy of mini- generators effectively, so the sustaining and low energy can be used effectively and rationally. The circuit contains the filter circuit, MOS switch, energy storage and supplement circuit and key control circuit. Taking vibration- based piezoelectric generator as an example,the design and application of the control circuit is presented in this paper. The experimental results show that only no more than 40μw is consumed by the circui. It can be used to supply energy to low- power electronic device, sensors and wireless sensors network with high instantaneous power consumption desultorily.