摘要
针对传统热电(TEG)能量收集系统输出功率范围窄,重载时无法收集或低效收集TEG能量问题,提出了一种最大化TEG能量收集可重构DC-DC转换器。该方法通过6个功率开关实现。轻载时TEG通过升压电路给负载供电或将多余的能量存储到储能电池。重载阶段,电感由储能电池充电;电感放电优先采用TEG放电回路,通过放电回路将TEG能量转换到负载,实现重载时高效收集TEG能量,同时拓宽了系统的输出功率范围。采用输入纹波控制的方式完成最大功率追踪,同时提出一种自适应导通时间零电流开关技术来提高转换效率。180 nm CMOS工艺仿真验证表明,所提出的系统在2.5 mW的输入功率下,端到端峰值转换效率达到92.34%;重载时(I_(load)=10 mA),TEG能够为负载提供12%的功率。
The conventional thermoelectric(TEG)energy harvesting system exhibits a narrow output power range and cannot collect TEG energy or inefficiently collects the energy under a heavy load.In this study,we proposed a reconfigurable DC-DC converter with maximum energy harvesting to overcome these issues.The proposed method is achieved by using six power switches.Under light load,the TEG supplies power to the load using a boost circuit or stores excess energy to the energy storage battery.Under heavy load,the inductor is charged by the energy storage battery.The TEG discharge circuit is preferentially used for inductive discharge and the energy is converted to the load through the discharge loop to realize the efficient collection of energy under heavy load,and broaden the output power range of the system.Maximum power tracking is achieved through input ripple control,and an adaptive on-time zerocurrent switching technology is proposed to improve the conversion efficiency.The results obtained under the 180 nm CMOS process indicate that the proposed system exhibits an end-to-end peak conversion efficiency of 92.34%at an input power of 2.5 mW,and the TEG can provide 12%of the power to the load when the system works under heavy load(Iload=10 mA).
作者
李淦初
徐卫林
莫培思
李力锋
李海鸥
韦雪明
LI Ganchu;XU Weilin;MO Peisi;LI Lifeng;LI Haiou;Wei Xueming(Guangxi Key Laboratory of Precision Navigation Technology and Application,Guilin University of Electronic Technology,Guilin,Guagnxi 541004,P.R.China;Key Laboratory of Microelectronic Devices and Integrated Circuits(Guilin University of Electronic Technology),Education Department of Guangxi Zhuang Autonomous Region,Guilin,Guangxi 541004,P.R.China;Hunan Guoke Microelectronics Co.,Ltd.,Changsha,410131 P.R.China)
出处
《微电子学》
北大核心
2025年第6期993-999,共7页
Microelectronics
基金
国家自然科学基金资助项目(62064002)
广西自然科学基金资助项目(2024GXNSFAA010487)。
