Power Electronics and Motor Drive Systems

5.3. Three-Phase Bridge Fully Controlled Thyristor Rectifier

It has already been pointed out in Section 5.2 that the three-phase half-wave controlled rectifier of Fig. 5.11(a) is impractical for most applications, since the source currents would have dc components, difficult to apply transformer and its output power is limited. Fig. 5.13(a) presents the three-phase bridge fully controlled thyristor rectifier that has none of these disadvantages. This rectifier represents one of the best solutions for three-phase ac to dc power conversion when thyristors are used. This is due to high-power output supply capabilities as well as to low output voltage ripple. Another important advantage of this rectifier is the ability of using an input transformer ...