Forward converter is one more well-liked switched mode power supply (SMPS) circuit, second only to the infamous fly-back converter. Forward converter is utilized for generating isolated and controlled dc voltage from the unfettered dc input supply. The fly-back converters input dc supply resulted once correcting of the utility ac voltage. The forward converter, once evaluated with the fly-back circuit, is usually extra energy efficient and is applied for applications entailing little higher power output. The circuit topology, specially the output filtering circuit is not as easy as in the fly-back converter.

The essential topology of the forward converter have a fast switching device 'S' together with its control circuitry, a transformer with its primary winding associated in series with switch 'S' to the input supply and a rectification and filtering circuit for the transformer secondary winding. The load is linked athwart the rectified output of the transformer-secondary. The transformer exercised in the forward converter is preferred to be a perfect transformer with no leakage fluxes, zero magnetizing current and no losses. The fundamental operation of the circuit is elucidated at this juncture imagining ideal circuit elements and later on the non-ideal characteristics of the devices are paid attention by appropriate modification in the circuit design. Actually, owing to the existence of finite magnetizing current in a practical transformer, a tertiary winding must to be initiated in the transformer and the circuit topology changes to some extend.

The forward converter has turn out to be a cost effective solution to a lot of power management needs and fill the void produced between the low power fly-back converter and the more complex high power bridge types. With its ongoing proliferation, more chances appear for new well-organized operation, higher switching frequencies, decreased EMl/RFl and extended duty cycle operation. This paper offers a pioneering technique to appropriately clamp and reset the forward converter's main transformer while attaining low loss, zero voltage transitions of the power switch under wide duty cycle variations devoid of the extreme voltage stress or else seen. The conventional forward converter makes use of a single power switch.