Three Phase Controlled Rectifiers

The 3-phase half wave converter combines three single phase half wave controlled rectifiers in one single circuit feeding a common load. The thyristor S1 in series with one of the supply phase windings ‘a-n’ acts as one half wave controlled rectifier. The second thyristor S2 in series with the supply phase winding ‘b-n’ acts as the second half wave controlled rectifier. The third thyristor S3 in series with the supply phase winding acts as the third half wave controlled rectifier. Figure bellow shows three phase fully controlled rectifier.