Controlled AC/DC converters are usually called controlled rectifiers that convert an AC power supply source voltage to a controlled DC load voltage. Controlled AC/DC conversion technology is a vast area in research and industrial applications. A single-phase half-wave controlled rectifier consists of a single-phase AC input voltage and one thyristor. The controlled AC/DC converters consist of thyristor/diode circuits. They can be sorted into the following groups: single-phase half-wave rectifiers, three-phase rectifiers with half/full control, single-phase full-wave rectifiers with half/full control and multipulse rectifiers. Controlled AC/DC conversion technology is a vast area in research and industrial applications. Usually, the rectifier devices are thyristor, gate-turn-off thyristor, power transistor and insulated gate bipolar transistor. The controlled rectifiers are supplied from an ideal AC source. Two conditions must be met before the thyristor can be conducted: the thyristor must be forward biased and a current must be applied to the gate of the thyristor.