ABSTRACT
Controlled AC/DC converters are usually called controlled rectifiers. They convert an AC power supply source voltage to a controlled DC load voltage [1-3]. Controlled AC/DC conversion technology is a vast subject area spanning research investigation to industrial applications. Usually, such rectifier devices are thyristors (or SCRs-silicon-controlled rectifiers), gate-turn-off thyristors (GTOs), power transistors (PTs), insulated gate bipolar transistors (IGBTs), and so on. Generally, the device used most is the thyristor (or SCR). Controlled AC/DC converters consist of thyristor/diode circuits, which can be sorted into the following groups:
• Single-phase half-wave rectifiers. • Single-phase full-wave rectifiers with half/full control. • Three-phase rectifiers with half/full control. • Multipulse rectifiers.
