Romanenko D. The development of technical descriptions of cylindrical piezoceramic transformers

Object of research are processes of conversion of electrical values in mechanical and mechanical values in electrical in cylindrical piesoceramic transformers. The operation purpose consists in perfection of cylindrical piesoceramic transformers. For object in view achievement following tasks have been carried out: the analysis of a state of the modern electroacoustical transformers and piesoceramic transformers for them, and also methods of improvement of their technical characteristics is carried out; mathematical and computer models multielectrode cylindrical пьезотрансформаторов are constructed and researched; circuits of connection of cylindrical piesoceramic transformers are constructed and researched; methods of improving of response characteristics, transmission ratio and working range of frequencies of cylindrical piesoceramic transformers are developed and researched. Practical value of the received results consists in the following: The scientific and technical basis of designing of cylindrical piezoelectric transformers that allows to project transformers with the refined characteristics is expanded; the constructed mathematical models allow to estimate and predict response characteristics of cylindrical piezoelectric transformers more precisely; the developed circuits of connection of cylindrical piezoelectric transformers have allowed considerably (in 3 times and more) to expand working range of frequencies, and also on the order to raise sensitivity; the received results have wider value and can be used not only for cylindrical piesoceramic transformers, but also for other devices developed on their basis. Scientific novelty of the received results: For the first time the mathematical model of the four-electrode cylindrical transformer is developed, allowing to calculate amplitudes of pressure on the generating electrodes which registration will allow to project cylindrical пьезотрансформаторы with necessary technical characteristics; for the first time mathematical models of piesoceramic adders on the basis of cylindrical piesoceramic transformers that allows to add electrical and mechanical influences are constructed and researched, to increase level of output pressure; the theory of conversion of physical values, in particular sound pressure in an electrical signal in cylindrical пьезотрансформаторах has had the further development that allows as it is possible to describe more precisely transformation processes in пьезотрансформаторах; The theory of transformation of pressure of cylindrical transformers at the expense of a variation of the form and space layout of electrodes that allows to increase level of transformation ratio of the cylindrical transformer has had the further development; the theory of creation of broad-band cylindrical transformers at the expense of adding пьезотрансформатора in circuits of electrical wave filters of the lower frequencies that allows to expand working range of conversion frequencies has had the further development. Results of researches are confirmed by publications and patents of Ukraine and used in the industry, in particular, in factory "Fotopribor" (Cherkassy) and Open Society "Ukrpiezo", and also in educational process on discipline «Reformative devices of instruments» at the Cherkassy state technological university.