Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (6): 1953-1958.doi: 10.13229/j.cnki.jdxbgxb20200596

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Design and test of broadband power generation device with cantilever piezoelectric vibrator

Xiao-chao TIAN1,2(),Hai-gang WANG1,2,Hu WANG1,2,Zhi-cong WANG1,2,Jian ZHAO2,Zhi-gang YANG3(),Yue WU3   

  1. 1.Institute of Mechanical and Vehicle Engineering，Changchun University，Changchun 130022，China
    2.Jilin Provincial Key Laboratory of Human Health Status Identification and Function Enhancement，Changchun University，Changchun 130022，China
    3.College of Mechanical and Aerospace Engineering，Jilin University，Changchun 130022，China
  • Received:2020-08-10 Online:2021-11-01 Published:2021-11-15
  • Contact: Zhi-gang YANG E-mail:tianxczb@163.com;yzg@jlu.edu.cn

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Abstract:

To increase the generation and efficiency of piezoelectric materials, a cantilever piezoelectric vibrator broadband power generation device is designed. Firstly, the output and phase frequency characteristics of a single piezoelectric vibrator were analyzed, the parameter factors that affect the output were obtained. Then, the series/parallel output performance of the double piezoelectric vibrators connected with rectifiers were analyzed, the output voltage was the larger value of the two piezoelectric vibrators and the frequency bandwidth was increased when the series-parallel piezoelectric vibrators were rectified. Finally, the power generation tests of four piezoelectric vibrators were implemented. The test results indicate that the effective power generation bandwidth of a single piezoelectric vibrator is about 10 Hz, the effective power generation frequency range of the series/parallel four piezoelectric vibrators connected with rectifiers is 44.5 Hz~121.3 Hz and the width is about 77 Hz. The effective power generation bandwidth is improved when the output voltage is 30 V. The device can be used to adaptive power supply in narrow space.

Key words: mechanical design, piezoelectric vibrator, cantilever, piezoelectric capture energy, positive piezoelectric effect

CLC Number: 

  • TM619

Fig.1

Schematic diagram of generator"

Fig.2

Schematic diagram of single vibrator bending"

Fig.3

Series / parallel output circuit with two vibrators"

Fig.4

Respective voltage-time curves of the twovibrators connected with rectifiers"

Fig.5

Series / parallel voltage outputcharacteristic curves"

Fig.6

Broadband power generation test device"

Fig.7

Independent voltage output characteristiccurves of piezoelectric vibrators"

Fig.8

Series/parallel voltage output characteristic curves of piezoelectric vibrators connectedwith rectifiers"

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