Fuzzy Logic Controller Based ZVT-ZCT PWM Boost Converter Using Renewable Energy Sources

In this study, a new boost converter with an active snubber cell is proposed. The active snubber cell provides main switch to turn on with zero voltage transition (ZVT) and to turn off with zero current transition (ZCT). The proposed converter incorporating this snubber cell can operate with soft switching at high frequencies. Also, in this converter all semiconductor devices operate with soft switching. There is no additional voltage stress across the main and auxiliary components. The converter has a simple structure, minimum number of components and ease of control as well. The Fuzzy Logic (FL) controller with two inputs maintains the load voltage by detecting the voltage variations through d-q transformation technique is connected in feedback of these converters. The presented theoretical analysis is measured in simulation results by 2.3kW and 100 kHz boost converter. Here output voltage up to 400v is given Also, the overall efficiency of the new converter has reached a value of 97.8% at nominal output power. Keywords: Soft switching, zero current transition, zero voltage transition, DC-DC converter, Fuzzy Logic Controller