Proposal of a SMPS with AC output voltage employing a quadratic boost converter, a new topology of soft-switched two-switch forward converter and a new topology of PWM three-level half-bridge inverter

An AC SMPS can be obtained from the association of a new topology of forward converter and a new topology of half-bridge inverter. The DC-DC stage is composed of a quadratic boost converter providing large voltage step-up and a double-ended forward converter, whose output voltages are +200 V_dc and -200 V_dc. The DC-AC stage consists of a symmetrical three-level inverter topology. The operation of the converters is analyzed, as some results concerning the proposed system are presented.