Non-contact Excitation of Piezoelectric Components Through Parallel Plate Capacitor Like Electric Field Generator

The non-contact excitation of piezoelectric (piezo) components by different metal electrode shaped electric field generators have been explored. By means of Finite element method (FEM), the performance of contactless energized piezoelectric plate through various electrodes configuration of electric field generators. The output power and electric field pattern across different piezoelectric materials (PZT-5A, PZT-5H, along with BaTiO3 and LiNbO3) for different electrodes shape (i.e., rectangular, square, circular) have been analysed. The optimal excitation achieved across the piezoelectric plate for rectangular and square shaped copper electrodes rather than circular shaped electrode. The piezoelectric material PZT-5H shows better performance than its counterpart as it has higher electromechanical conversion ability through the applied electric field. For rectangular shaped live and ground electrodes with input 50 V and electrodes gap i.e. 4 mm, at 924 kHz resonance frequency, the maximal output power i.e., Po of 0.29 mW is attained across the piezoelectric materials PZT-5H.