Power converter using soft switching method for zero current switching at turn on and zero voltage switching at turn off

摘要

A power converter includes a main switch to which a capacitor is connected through a sub-diode. A series connection of a primary coil of a transformer and a sub-switch is connected parallel to the capacitor. A main diode is coupled in series with the main switch. A series connection of a sub-diode and a secondary coil of the transformer is parallel to the main diode. The rate of a rise in voltage across the main switch when turned off is suppressed by the rate of charging of the capacitor. Subsequently, by turning on the sub-switch, the current flowing through the main diode to be delivered to the transformer, thereby causing the current flowing through the main switch when turned on to be decreased by the sub-inductor.