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一种采用频率变换的自供电电源管理电路
资料介绍
在低频率条件下,采用直接阻抗匹配的原理,设计的压电材料换能器电源管理电路,匹配电感值很大.本文采用频率变换,设计了一种自供电电源管理电路.分析了频率变换的原理.将低频信号变换至较高频率,匹配电感值很小,有利于电路的小型化.该管理电路还可以在宽频带内对于压电换能器实现匹配.实验结果表明,电路实现了频率变换,匹配电感值和电路体积都大大减小.电源管理电路的最大采集功率为181.6mW,能量采集效率可以达到44.8%.当0.47法拉的储能电容电压为1.13V时,该电路最大放电功率可达110mW,放电时间持续620ms,能够驱动无线传感器在一个周期内正常工作.
In low frequency applications,a large inductance is needed for directly matching the piezoelectric transducer impedance in the power supply management circuit.This paper designs a self-powered piezoelectric energy harvesting circuit using frequency conversion.The principle of frequency conversion is analyzed.Because the low frequency can be converted to a higher frequency by using a small matching inductance,the size of the power supply management circuit is very small.The circuit can realize the matching for the piezoelectric transducer in a wide range of frequency bandwidth.The experiment results show that the frequency of the transducer can be converted,and th...
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| 文件名 | 大小 |
| 一种采用频率变换的自供电电源管理电路.pdf | 673K |
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