一种自感知型电感同步开关能量采集电路

A Novel Self-Sensing Synchronized Switch Harvesting on Inductor

电感同步开关能量采集(SSHI)电路可显著提高压电式振动能量采集装置的工作效率,然而其开关控制需要外接传感器和控制器。为此,文中提出了一种自感知电感同步开关能量采集电路(SS-SSHI),可完全不依赖外部检测和控制设备,仅通过模拟电路即可自动实现SSHI电路开关的自动开闭和电压翻转。本文阐述了SS-SSHI电路的工作原理,分析了SS-SSHI电路工作状态及功率变化。理论和实验研究表明使用SS-SSHI电路能够显著的提高能量采集效率,相比于标准能量采集电路(SEH),最大输出功率可提高99.23%。

It has been proved that by applying the SSHI （ Synchronized Switch Harvesting on Inductor ） can greatly improve the piezoelectric vibration energy harvesting efficiency. However,additional sensor and controller is needed to control the switch in the SSHI circuit. To reduce the dependence on external equipments,a new circuit called SS-SSHI（Self-Sensing Synchronized Switch Harvesting on Inductor） is proposed. It can achieve the switch-on-off of SSHI automatically through analog circuit without any external testing and control equipment. This paper elaborates the principles of SS-SSHI,analysis the work status and output power of SS-SSHI. Both theoretical and experimental results show that the harvested power can be significantly increased with SS-SSHI circuit,and the maximum power-output increased 99.23% compared to the SEH（ Standard Energy Harvesting） circuit.