According to theories of predictive functional control (PFC) and the characters of cold rolling temper mill, PFC-PID cascade elongation control system is designed.
PLC control is adopted in automatic control system for finishing area of Chuanwei 950 mm hot strip mill. Main functions include speed cascade control, tension control, looper control, APC control etc.
This paper analyses the characteristics, efficiency and harmonic of four kinds of power circuits for SCR-cascade control used in textile mill ventilators.