Simulation and implementation a fuzzy logic control for a refrigeration drive based on the variable speed cycle

Abstract

In recent years, there has been a need to design highly efficient cooling devices that are used in the manufacture of nanomaterials and some medical treatments. The objective of this paper is to design the membership shape of a variable speed cycle variable speed fuzzy logic controller for a cooling engine. The fuzzy logic controller sets the sampling time for the SVPWM in the inverter system in the variable speed drive cooling cycle. The research focuses on the systematic design of membership ranges for key design factors such as control error and control error rate. The upper and lower limits of the membership ranges are prepared from the static characteristics data obtained by modelling MATLAB. Membership range was tested on control error and error rate control experiments. The effect of sampling time on control performance has been investigated and has been shown to have a significant effect on the refrigeration cycle control performance of a variable speed drive, the results of proposed device demonstrate settling time less than (15 sec).