Ferrite core transformer design and its applications

Transformers are high efficiency electrical machines that change alternating(A.C) voltage and current level according to the needs of the electrical energyuser, their role in energy transmission and distribution is extremely important.Because of the low core losses and manufacturing cost ferrite cores and ideal forinverter and converter transformers used in the frequency range of 20kHz -3MHz. Ferrites have very high electrical resistance that limits the flow ofinduced eddy currents in the core. However their saturation flux densities aresmall in comparison to the laminated magnetic cores. A high percentage offerrites are used in SMPS applications.In this thesis, the design of ferrite core high-frequency transformers areanalysed. A flyback switch mode converter is built. The magnetic properties andfrequency response of the ferrite core is examined andmeasured experimentally.Key Words : Transformer, ferrite core, histeresize core current