Finite Element Method Analysis of Piezoelectric Transformer

摘要

FEM analysis (finite element method) was applied in order to find out the method of controlling spurious vibration, which is generated during piezoelectric transformer use. When the length, width, and thickness of an element are changed, eigen frequency of both drive longitudinal resonance vibration (specifically primary mode) and spurious vibration changes. The optimal design size was found by using the fact that the rate of change differed with vibration type. The eigen frequency (natural frequency) of spurious vibrations obtained from FEM analysis and the surveyed elements were in agreement. By changing the element size parameters, we were able to design an element that decreased spurious vibration.