Rectifier power supply for a modern rod mill

THE steel industry in the United States is a large user of d-c electric power. Since the use of d-c power for rolling mill drives is so widespread, it is natural to consider the application of ignitron rectifier equipment as the power supply for main mill drive service. Until approximately 20 years ago, the motor-generator set was used exclusively to supply the large amounts of d-c power for rolling mill service. Recently, however, ignitron rectifiers have found increasingly frequent use in the making of steel.