低功耗自供电压电能量管理电路的研究

为了提高压电能量采集系统的采集效率,该文提出了一种用于压电能量采集的自供电能量管理电路.采用基于并联同步开关感应(P-SSHI)技术的有源全桥整流电路来提高压电采能器的功率,降低整流电路上的导通损耗;采用低功耗稳压降压集成芯片配合超级电容器,实现能量的高效采集存储.仿真结果表明,在模拟输出电压幅值为20 V时,该整流电...

Research on Selfpowered Piezoelectric Energy Management Circuit withLow Power Consumption

In order to improve the harvesting efficiency of the piezoelectric energy harvesting system, a selfpowered energy management circuit for piezoelectric energy harvesting is presented in this article. An active full bridge rectifier circuit based on the parallel synchronized switch harvesting on inductor(PSSHI) technique is used to improve the power extraction capability from piezoelectric harvester and reduce the conduction loss on the rectifying path. A low power consumption voltage regulator, stepdown integrated chip and super capacitors are used to achieve highly efficient energy collection and storage. The simulation results show that when the analog output voltage amplitude is 20 V, the output power of the proposed rectifier circuit is 1.084 6 W, which is 16.8% higher than that of the average output power of the traditional rectifier circuit. When the maximum output voltage is 5 V, the stored energy can reach 4.137 1 J in 30 s.