摘要
设计了一种适用于环境振动能量俘获系统的高效率电源管理电路。电路采用了最大功率点跟踪(MPPT)技术,以解决环境振动能量不稳定和经换能器换能后的输出功率负载依赖性强的问题。针对MPPT工作过程中电压调整阶段功率损耗过大的问题,提出了高频开关控制的类Buck结构拓扑,以减小电压调整阶段的开关损耗,进一步提高了系统效率,并可实现预稳压,为后级电源管理电路减轻负担。电路采用0.18μm CMOS工艺设计,仿真结果表明,随着振动环境及负载的变化,最大功率点跟踪效率始终维持在98.55%~99.45%,系统效率提高至94.2%。
A high efficiency power management circuit for ambient vibration energy harvesting system was designed. As the unstable ambient vibration energy and the strong load dependence, the maximum power point tracking(MPPT) technology was used. To address the problem of excessive power loss in the voltage adjustment phase during MPPT operation, a pseudo buck structure topology with a high frequency switching controller was proposed to reduce the switching loss in the voltage adjustment phase, further improving the system efficiency and enabling pre-stabilization to reduce the burden on the later stage power management. The proposed circuit was designed in a 0.18 μm CMOS process. The simulation results show that, the maximum power point tracking efficiency is maintained at 98.55%~99.45% with wide variations of the input vibration energy and the system load. And the system efficiency is improved up to 94.2%.
作者
潘春彪
钱利波
夏桦康
叶益迭
PAN Chunbiao;QIAN Libo;XIA Huakang;YE Yidie(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo,Zhejiang315211,P.R.China;Hangzhou Institute of Technology,Xidian University,Hangzhou 311231,P.R.China)
出处
《微电子学》
CAS
北大核心
2022年第5期777-782,共6页
Microelectronics
基金
浙江省自然科学基金资助项目(LY20F010003)
宁波市自然科学基金资助项目(2019A610113)
国家自然科学基金资助重点项目(62131010)
宁波大学王宽诚幸福基金。
