We investigated the efficiency of the storage device based on the piezoelectric generator (PEG) in the form bimorph, which is a circular plate with inertial mass; the active material is a PMN-0,33PT relaxor. The plate is fixed along the contour in the body of the device, which performs vertical harmonic oscillations with a given amplitude and frequency. Our studies based on finite element modeling and numerical calculation in the ANSYS package. A notable feature of relaxors is a significant dependence of their properties on temperature, so in this paper, we studied the relation on operating temperature and the magnitude of the active load of the resonant frequencies, output voltages and electric power of the device with oscillations at these frequencies. Based on performed calculations we have established the values of the active resistances of the external electric circuit for different temperature ranges at which the device is most effective.

Keywords: energy storage, relaxor ferroelectric, PEG