Current Control Systems
Rectifier systems for electrolytic services must generally be operated by an automatic current control system, and they often also require a demand control system, which overrides the automatic current control system.
For automatic output current control, a combination of voltage control functions, as described on page 11, is utilized for diode rectifiers and as for thyristor rectifiers, the output current is controlled by the gate control of the thyristor. Fig. 11, shows a typical automatic constant current control system for a diode rectifier system. Fig. 12 shows a typical automatic constant current control system for a thyristor rectifier system.
In either system, Fuji Electric offers a robust, stable and field-proven control device which can be easily linked to a computer and/or PLC (programmable logic controller) system.
