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Series Resonant Converter with Piezoelectric Ceramic Transducers and Fuzzy Logic Control with Genetic Optimization

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2 Author(s)
Pawel Fabijanski ; Institute of Control and Industrial Electronics, Warsaw University of Technology, Warsaw, Poland, e-mail: pawel@isep.pw.edu.pl ; Ryszard Lagoda

Sandwich type piezoelectric ceramic transducers are the most frequently applied source of ultrasounds in technical cleaning system. They have the ability to radiate in an ultrasonic medium, e.g. water, with maximum acoustic power when the vibration is activated by a current whose frequency equals the mechanical resonance frequency of the transducer. In resonant inverters the transducer units are part of the oscillating circuit, for which equivalent electrical circuit consist of connection in parallel: Co end RLC. Genetic algorithm is used to optimization of structure and parameters piezoelectric ceramic transducer. Genetic algorithm have been shown to be effective in the resolution of difficult problems. The resonant frequency of the real circuit varies during the operation in function of many parameters, among others, the most important are temperature, time, the column of cleaning factor, and the surface of the cleaned elements. In this situation, to obtain the maximum value of the converter efficiency, its important role of control system to assure the optimal mechanical resonant frequencies of converter.

Published in:

EUROCON, 2007. The International Conference on "Computer as a Tool"

Date of Conference:

9-12 Sept. 2007