A quasi-resonant current-fed converter with minimum switching losses

What is it about?

A quasi-resonant DC-DC Converter with high voltage gain and low current stresses on switches is proposed in this paper. This Converter preserved inherent advantages of current-fed structures, for instance: zero magnetizing DC offset, low input ripple and low transformer turn ratio. Moreover, by employing active clamp circuit the voltage spikes across the main switch, due to existence of leakage inductance of isolating transformer is absorbed and switches work in zero voltage switching (ZVS).

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Why is it important?

Since quasi-resonant switching strategy is employed turn-off current and losses of switches are considerably reduced. Because of Zero Current Switching reverse recovery problem of diodes is alleviated.