This example shows the operation of thyristor rectifiers.
This example compares the operation of a six-pulse thyristor rectifier to a twelve-pulse thyristor rectifier.
The twelve-pulse bridge is represented by two six-pulse bridge connected in series, with their AC connections connected to a transformer with two secondaries (one wye, one delta) that produces a 30 deg. phase shift between the two bridges. This transformer configuration cancels many of the characteristic harmonics produced by the six-pulse bridges.