CONSTRUCTING A MODEL OF PIEZOELECTRIC DISK TRANSFORMER WITH RING ELECTRODES IN PRIMARY ELECTRICAL CIRCUIT

Abstract

The piezoceramics has applications in various fields of engineering and technology because of its unique properties. The relevance of the use of various functional elements of piezoelectronics in radio electronics, information and power systems is explained by their high reliability and small dimensions, which solves the problem of miniaturization of such systems.Piezoelectric disks with surfaces partially covered electrodes are often used to create various functional piezoelectronic devices. In disk piezoelectric elements with surfaces partially covered by electrodes oscillations of compression-tension and transverse bending vibrations can be excited simultaneously. Manipulating the geometric parameters of electrodes and their location relative to each other, you can have a significant effect on the energy of oscillatory motion particular type of material particles of piezoelectric disk volume. It should be especially noted that this piezoelectric element has compatibility with microsystem technology, so it can be made as microelectromechanical structuresMathematical model of piezoceramic disk transformer with ring electrode in primary electrical circuit is constructed. An estimate is obtained and calculated and experimental curves of the frequency dependence of the modulus of transformation coefficient of piezoceramic disk transformer with ring electrode in primary electrical circuit are compared in the work.Mathematical models of piezoelectric transformers working with axially symmetric radial oscillations of piezoceramic disks are constructed with a minimal number of assumptions simplifying the real situation. This allows us to state that the proposed construction scheme delivers mathematical models that are sufficiently adequate to the real objects and physical processes that exist in them.As a result of research of real device’s mathematical model a set of geometrical, physical and mechanical and electrical parameters of a real object can be determined which provides realization of technical parameters of piezoelectric functional element specified in technical specifications. The cost of the saved resources is the commercial price of the mathematical model.