Chopper Rectifiers

Controlled Systems chopper rectifier designs consist of high frequency switching technology in a modular design package that converts the secondary AC voltage to a regulated output DC voltage. Larger power systems are constructed of multiple chopper modules to obtain the specified current requirements. Each section of modules has a separate set of sensing and protection and receives directions from the main chopper controller. This chopper conversion process has minimal effect on the incoming power system and a high power factor is maintained at the level of a fixed diode converter. The transformer section is configured to optimize the harmonics. The total module count usually results in a 12 pulse configuration as seen by the utility. The load sees a very smooth low ripple DC over the total range due to compact high frequency output filtering. Controlled Systems designs and manufactures all the water-cooled IGBT power modules used in our chopper rectifiers. A full control metering, monitoring, and fast protection scheme is integral to all Controlled Systems chopper rectifiers