Reduction of Switching Losses in VSC Using DC Link Fuzzy Logic Controller

Abstract

The main objective of a soft switching circuit is to reduce the switching losses in a static converter when is switched at high frequency. In this paper a DC link fuzzy logic controller applied to a VSC (voltage source converter). The lossless switching is tested in a parallel VSC and is verified the effect of the soft switching circuit in MATLAB-SIMULINK. During the switching interval some power is dissipated in power transistors. A VSC in parallel to the DC link is added in simulation to show the instantaneous power in any switch.

Keywords: fuzzy logic controller with rule-viewer, dc link, soft switching, voltage source inverter, lossless switching