Three-phase controlled rectifiers have a wide range of applications, from small rectifiers to large
High Voltage Direct Current (HVDC) transmission systems. They are used for electro-chemical
process, many kinds of motor drives, traction equipment, controlled power supplies, and many
other applications. From the point of view of the commutation process, they can be classified in
two important categories: Line Commutated Controlled Rectifiers (Thyristor Rectifiers), and
Force Commutated PWM Rectifiers.