| Summary: | 碩士 === 聖約翰科技大學 === 自動化及機電整合研究所 === 99 === The mechanical-electrical energy conversion device of a DC generator is
consisted of piezoelectric materials in this study. Using the smart materials with
piezoelectric effect, a cleaning and renewable power generator was developed and it is
suitable research subject without pollution in the near future. The finite element
method (FEM) was adopted to assist the developing process for the energy converter
made by the smart materials with piezoelectric effect. That is, the structure of this
device contains the specific mechanical feature and electrical characteristics that were
explored at first through FEM. Hence, all relative physical phenomena within
operating band width could be predicted.
Dynamic behavior analysis of a DC generator has modal analysis, harmonic
analysis, and impedance analysis as well as electrical power calculation via the FEM
software ANSYS. The natural frequencies and mode shapes were obtained and the
resonant frequency of the device’s structure should be avoided. Also, the
deformation, internal stress, and admittance could be computed for the new designed
device, because of their influences on the efficiency of power generation. Thus,
these simulations would be compared with the experimental results for evaluating the
validation of FEM model based on the error percentage.
Keywords: Piezoelectric effect, Finite element analysis, Smart materials, Impedance
analysis
|
|---|
