基于S-SSHI和SECE混合的自供电能量俘获电路  

Self-powered energy harvesting circuit based on hybrid S-SSHI and SECE

作　　者：陈聪 严柏平 林峻宁 冯浩文 CHEN Cong;YAN Baiping;LIN Junning;FENG Haowen(School of Automation,Guangdong University of Technology,Guangzhou510006,China)

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《电子元件与材料》2023年第10期1232-1240,共9页Electronic Components And Materials

基　　金：广东省自然科学基金(2018A030313010);广州市科技计划项目(202102021135)。

摘　　要：为解决现有压电能量俘获电路效率低、开关辅助电路结构复杂且能耗高等问题,基于串联同步开关电感(Series Synchronized Switch Harvesting on Inductor,S-SSHI)电路输出功率峰值高和同步电荷提取(Synchronous Electric Charge Extraction,SECE)电路负载范围宽的优点,提出一种具有自供电功能的能量俘获电路。为实现SSSHI电路和SECE电路混合,基于二者开关动作均在压电元件开路电压的极值点,提出了正极值点电压翻转、负极值点电荷提取的策略;设计了两个非对称无源正/负峰值检测电路检测正/负极值,使正/负半周期的工作模式分别为S-SSHI和SECE,从而达到输出功率和负载范围的平衡。通过仿真建模研究所提电路的可行性,验证了所提电路俘能性能优越,输出功率峰值可达SEH电路的4倍,同时具有较宽的负载范围。In order to mitigate the inefficiency inherent in tcurrent piezoelectric energy harvesting circuits,as well as the intricate structures and significant energy consumption associated with switching auxiliary circuits,a self-powered energy harvesting circuit was proposed.This circuit leveraged the remarkable peak output power of the series synchronized switch harvesting on the inductor(S-SSHI)circuit and the expansive load range of the synchronous electric charge extraction(SECE)circuit.The integration of the S-SSHI and SECE circuits was achieved through the strategic implementation of voltage reversal at the positive extremum and charge extraction at the negative extremum,and the open-circuit voltage extremum of the piezoelectric element was used as the basis for switch operation.The positive/negative extremum value was detected by two dissimilar passive positive/negative peak detection circuits,which enabled the S-SSHI and SECE modes during the positive/negative half-cycle of the circuit,respectively.So the harmonious equilibrium between output power and load range was achieved.The feasibility of the proposed circuit was established through comprehensive simulation modeling.The proposed circuit exhibits exceptional energy harvesting performance,and the peak output power of the SEH circuit is quadrupled with wide load range.

关 键 词：压电元件 接口电路 同步电荷提取 串联同步开关电感 自供电 

分 类 号：TN712.5[电子电信—电路与系统]