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An Energy Harvesting Circuit for Piezoelectric-Electromagnetic Composite Energy Harvesters

An energy harvesting and piezoelectric energy harvesting technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc. , the effect of high output voltage and high output power

Active Publication Date: 2018-05-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrostatic energy harvester requires an external power supply, which greatly limits its application

Method used

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  • An Energy Harvesting Circuit for Piezoelectric-Electromagnetic Composite Energy Harvesters
  • An Energy Harvesting Circuit for Piezoelectric-Electromagnetic Composite Energy Harvesters
  • An Energy Harvesting Circuit for Piezoelectric-Electromagnetic Composite Energy Harvesters

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Embodiment 1

[0031] Such as figure 1 , 2 , 3, the present embodiment discloses an energy harvesting circuit for a piezoelectric-electromagnetic composite energy harvester, including an energy harvesting circuit for an electromagnetic energy harvester, an energy harvesting circuit for a piezoelectric energy harvester, and an energy harvesting circuit for a composite energy harvester. A charging circuit that charges and prevents current backflow.

[0032] Such as figure 2 As shown, the energy harvesting circuit of the electromagnetic energy harvester is used to increase the output voltage of the electromagnetic energy harvester and reduce the output current, thereby increasing the output power. voltage matching.

[0033] The energy collection circuit of the electromagnetic energy harvester includes an AC-AC step-up module, a rectification filter module, a DC-DC step-down module, and an energy storage module.

[0034] The output voltage of the electromagnetic energy harvester is increase...

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Abstract

The invention discloses an energy collection circuit for a piezoelectric-electromagnetic composite energy harvester, relates to an energy collection circuit for an energy harvester, and belongs to the technical field of new energy and power generation. The invention includes an electromagnetic energy harvester energy collection circuit, a piezoelectric energy harvester energy collection circuit, and a charging circuit for realizing composite charging and preventing current backflow. The energy harvesting circuit of the electromagnetic energy harvester is used to increase the output voltage of the electromagnetic energy harvester and reduce the output current, thereby increasing the output power. The energy harvesting circuit of the piezoelectric energy harvester is used to reduce the output voltage of the piezoelectric energy harvester, increase the output current, and thereby increase the output power. The output voltage of the energy harvesting circuit of the electromagnetic energy harvester and the piezoelectric output of the energy harvesting circuit of the piezoelectric energy harvester match the charging voltage of the rechargeable battery. The invention can realize the conversion of alternating current into direct current and supply power to the load, that is, the piezoelectric-electromagnetic composite energy harvester can directly supply power to the load, thereby increasing the output power.

Description

technical field [0001] The invention relates to an energy collection circuit for an energy harvester, in particular to an energy collection circuit for a piezoelectric-electromagnetic composite energy harvester, which belongs to the technical field of new energy and power generation. Background technique [0002] With the rapid development of microelectronics manufacturing technology, wireless sensor networks and the emergence of various new low-power components, vibration-type energy harvesters that convert vibration energy into electrical energy and supply low-power devices have become a research hotspot. At present, vibration energy harvesters mainly include electrostatic, piezoelectric and electromagnetic types. The electrostatic energy harvester requires an external power supply, which greatly limits its application. The basic principle of electromagnetic energy harvesting is the law of electromagnetic induction. When the magnetic flux passing through the closed wire c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18H02K35/02
Inventor 刘海鹏武丽森高世桥张广义谭杨康王子文王学敏邱士起
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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