Snubber network design for triac driving single–phase industrial heater by applying fuzzy logic method

Abstract EN

Power switches require snubbing networks for driving single–phase industrial heaters.

Designing these networks, for controlling the maximum allowable rate of rise of anode current (di / dt) and excessive anode– cathode voltage rise (dv / dt) of power switching devices as thyristors and Triacs, is usually achieved using conventional methods like Time Constant Method (TCM), resonance Method RM), and Runge-Kutta Method (RKM In this paper an alternative design methodology using Fuzzy Logic Method FLM) is proposed for designing the snobbery network to control the voltage and current changes.

Results of FLM, with fewer rules requirements, show the close similarity with those of conventional design methods in such a network of a Triac driving 1.2 kW heater of an industrial plastic extruder machine.

The similarity, between Fuzzy Logic results and conventional techniques results, is confirming the applicability of the fuzzy logic in designing these snubbing networks.