Synchronous charge extraction system

Abstract

The invention discloses a synchronous charge extraction system, which relates to the field of charge extraction; comprising: the piezoelectric material generates charges through deformation and forms an alternating current; the frequency conversion circuit converts the low-frequency alternating current into a high-frequency alternating current, and accepts The control signal I generated from the bidirectional switch control circuit, the control signal I controls the first bidirectional switch in the frequency conversion circuit to turn on and off; the bidirectional switch control circuit generates control signals and sends them to the frequency conversion circuit and the DC -DC conversion circuit; the DC-DC conversion circuit receives the control signal II generated by the bidirectional switch control circuit, and the self-control signal II controls the conduction of the second bidirectional switch in the DC-DC conversion circuit after waveform conversion with cutoff. The maximum power and efficiency of energy harvesting are improved, and at the same time, because the matching inductance value is reduced in this circuit, the volume of the energy recovery device can be greatly reduced.

Description

technical field [0001] The present invention relates to the field of charge extraction, in particular to a synchronous charge extraction system. Background technique [0002] With the continuous development of MEMS technology, wireless communication technology and integrated circuit technology, the demand for microelectronic devices with small size and low energy consumption is increasing day by day. The topic of equipment energy has become the focus of research. [0003] In recent years, people have successively developed a variety of micro-energy devices, such as micro solar cells, micro lithium batteries and fuel cells, etc. Although micro solar cells can achieve long-term energy supply, they are easily restricted by weather and applications, and cannot be realized. There are many real-time energy supply constraints, so it has great limitations; while lithium batteries and fuel cells have low energy density and store less energy and need to be recharged frequently, resul...

AI Technical Summary

Problems solved by technology

[0003] In recent years, people have successively developed a variety of micro-energy devices, such as micro solar cells, micro lithium batteries and fuel cells, etc. Although micro solar cells can achieve long-term energy supply, they are easily restricted by weather and applications, and cannot be realized. There are many real-time energy supply constraints, so it has great limitations; while lithium batteries and fuel cells have low energy density and store less energy and need to be recharged frequently, resulting in limited life. In addition, waste lithium batteries will also cause environmental damage. It is very polluting and seriously endangers the environment. Therefore, the current vibration energy recovery technology based on piezoelectric materials has the most promising development prospects.

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