In order to increase the daily processing capacity of ore, a tungsten plant in Ninghua Fujian has introduced a roller pressure system; the dynamic and fixed roller of roller press is respectively driven by two sets 10kV/630kW motors. At present, almost all the roller presses are constant frequency speed control, which results in the unadjustable output, and the over-current phenomenon caused by the imbalance of dynamic and fixed roller motor power.
Master and slave control to achieve dynamic roller and fixed roller power balance, improving the system stability;
Roller presses capacity can be adjusted in real time according to site conditions, to avoid energy waste.
Motor to achieve zero impact soft start;
Low frequency large torque characteristics of the inverter fully meet the roller press heavy load start。