PLATING RECTIFIERS - SAMFA Home Page

Today s rectifier operates on the same principles used for decades. Sure,there have been many incremental improvements in manufacturing methodsand materials, but the basic principles are the same. The most noteworthyimprovements are those associated with electronics and computerisation. Allrectifiers have 1) a transformer that lowers Eskom s high voltage to the 6 18volts normally used by electroplaters or to the somewhat higher voltagesrequired by anodisers; 2) a rectification system that changes alternatingcurrent (AC) to direct current (DC); 3) power regulators; 4) controls and 5) ameans of cooling these components. Other than the cooling section, there areno moving transformer has primary and secondary sets of magnetic cores wound withconductive wire. The ratio of the number of wire turns around the primaryversus the number around the secondary regulates how much the voltage isstepped down.

of the output voltage. A disadvantage, however, is that voltage fluctuations are normal, a problem if plating thickness is critical. A similar control is the

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