Electricity production has become a global issue at different scales, from powering electronic devices to electric machines. The purpose of this study is to explore a new energy harvester. It consists in combining piezoelectric and triboelectric effects to increase the harvested electrical energy, from the same source of vibration. The used transducer to produce piezoelectrity is a PZT-5H disc, and the used materials pair to produce triboelectricity is Mica-PTFE. The operating vibration frequency varies from 20 Hz to 30 Hz. The experimental setup contains a harvesting electric circuit, a fixing device on which the Mica is mounted, a vibration exciter on which the PTFE and the piezoelectric disk are mounted, a frequency regulator to adjust the vibration frequency, an amplitude amplifier to set the vibration amplitude to the Mica-PTFE distance, and an oscilloscope to note the harvested voltage. The electric circuit is to rectify the harvested current and to store the produced energy in three capacitors, reserved respectively to triboelectric generation, piezoelectric generation, and combined piezoelectric and triboelectric generation. The harvested electrical energy for each electricity generator is determined for different vibration frequencies. The obtained results should help in mastering hybrid generators to supply low consumption devices, in replacement of batteries.

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

Hybrid Piezoelectric and Triboelectric Energy Harvesting Using the Same Source of Vibration

  • Amine Ben Alaya,
  • Charfeddine Mrad,
  • Ferid Kourda

摘要

Electricity production has become a global issue at different scales, from powering electronic devices to electric machines. The purpose of this study is to explore a new energy harvester. It consists in combining piezoelectric and triboelectric effects to increase the harvested electrical energy, from the same source of vibration. The used transducer to produce piezoelectrity is a PZT-5H disc, and the used materials pair to produce triboelectricity is Mica-PTFE. The operating vibration frequency varies from 20 Hz to 30 Hz. The experimental setup contains a harvesting electric circuit, a fixing device on which the Mica is mounted, a vibration exciter on which the PTFE and the piezoelectric disk are mounted, a frequency regulator to adjust the vibration frequency, an amplitude amplifier to set the vibration amplitude to the Mica-PTFE distance, and an oscilloscope to note the harvested voltage. The electric circuit is to rectify the harvested current and to store the produced energy in three capacitors, reserved respectively to triboelectric generation, piezoelectric generation, and combined piezoelectric and triboelectric generation. The harvested electrical energy for each electricity generator is determined for different vibration frequencies. The obtained results should help in mastering hybrid generators to supply low consumption devices, in replacement of batteries.