Performance investigation of ANFIS controlled LLC resonant converter for DC to DC energy conversion [articol]

Abstract

This paper presents development of a performance analysis of neuro fuzzy controllers to overcome the appearance of nonlinearities and uncertainties in the LLC resonant converter. This paper addresses a LLC resonant converter circuits are built for low output voltages (24 V) and such circuits can be useful for Telecom and server application. For obtaining the DC voltage transfer function Fundamental Harmonic Approximation (FHA) method has been adopted. Important issues of this converter are physical size, high conversion ratio, efficiency, and startup. The proposed topology has energy conversion efficiency of 92%, when operated at fully loaded condition. A neuro fuzzy controller based LLC isolated DC–DC converters are also proposed to regulate over wide range of loads. Switching losses are minimized by zero voltage switching by the use of resonant inductor and capacitor. This converter has advantages like low switching loss, less EMI, and less switching stresses.