A Management Circuit for Vibrating Energy Harvester

نویسندگان

  • Ping LI
  • Yumei WEN
  • Xianzhi DAI
  • Jin YANG
  • Jianpin YE
  • Zhi LI
چکیده

A piezoelectric/magnetostrictive composite vibrating energy generator is introduced, and its output characteristic is analyzed. In order to increase the maximum output power of the vibrating energy harvester, a new up-conversion matching circuit is proposed, which can change the low frequency vibrating signal into a narrow bandwidth signal focused on a higher frequency. The matching circuit with a small-size permalloy transformer has a stronger capacitor charging power due to up-conversion. It can obviously improve the charging time and the storing energy at capacitor. In order to increase the output power, a power management circuit can release the energy for driving power load in a short time. Experiments show that the management circuit can drive a WSN node with an output power of 75mW at a distance of over 60m.

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تاریخ انتشار 2010