Study of Rectifier Diode Loss Model of the Flyback Converter

This paper advocates an inclusive power loss modeling and simulation of rectifier diode of the Flyback power converter working under continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The small signal model which takes into considerations all active and passive components of the Flyback converter is implemented by means of MATLAB / PSIM software for computing constructive loss model of Flyback diode. The simple model and computer simulations are well suited for hypothetical, lucid investigations and simulation model of the converter. Lastly, a loss of rectifier diode is studied for DCM and CCM for the Flyback converter using synchronous rectification and Schottkey diode. Spurious over voltage and over current may be caused by a diode switching at the divergent points in the circuit bringing into play the different type of power diodes and its rating. Voltage and current waveforms focuses along with transient switching functions of different rating of diodes. Switching action of the diode is together with various energy losses for each operating cycle. This may give rise conspicuously evaluations of the huge power losses in the diode at high switching frequency and load of the Flyback converter.