新型风力压电发电装置设计及发电性能

Design of a Novel Wind Piezoelectric Generator and Its Generating Performance

为了利用压电发电装置采集自然界中的风能,并解决传统压电发电装置受外界振源限制的缺陷,设计了一种新型的风力压电发电装置。对装置中的悬臂梁压电振子进行了发电电压的理论分析及有限元验证,结果表明,压电振子发电电压的理论计算结果与ANSYS仿真结果基本吻合,两者之间的误差仅为0.54%。在此基础上,运用ANSYS有限元软件来计算该新型风力压电发电装置的发电能力,计算得到装置在振幅为1 mm、频率为20Hz的简谐力作用下,一个悬臂梁压电振子所产生的电压为30.1V。为了获得最佳的发电性能,对发电装置的结构参数进行了优化设计,研究结果表明,当悬臂梁压电振子的上表面比风车轴凸轮上凸点的最低点位置高2mm时,该装置具有最佳的发电性能,一个悬臂梁压电振子可产生约60.3V的发电电压。

In order to make use of the piezoelectric generating device to collect the natural wind power,and to solve the defects of conventional piezoelectric generators restricted by external vibration source,a novel wind piezoelectric generator is designed.The generating voltage of the cantilever piezoelectric vibrator enclosed in the device is analyzed theoretically and the corresponding finite element verification is carried out.The results show that the theoretical results are consistent with the ANSYS simulation ones,and the error is only 0.54%.Based on this,the generating capacity of the novel wind piezoelectric generator is calculated by using ANSYS finite element software,and the results show that a cantilever piezoelectric vibrator can produce the voltage of 30.1Vunder the simple harmonic force with the amplitude of 1mm,frequency of 20 Hz.Finally,the structural parameters are optimized for obtaining the best generating performance.It is found that the device has the best power performance when the cantilever piezoelectric vibrator on the surface than wind axle CAM on convex point to the lowest point higher than 2mm,and a cantilever piezoelectric vibrator will generate the output voltage of 60.3V.