基于PLC和WinCC的变频调速系统

Variable frequency speed control system based on PLC and WinCC is introduced,The accuracy of Variable frequency speed control system requirements is increasingly high, So it requires PID control,Switchover of frequency conversion and power frequenly is controlled by PLC, It can automatically control the speed of AC motor for velizing automatic regulation of close –loop, On the platform of WinCC,The computer monitoring software is designed,The practice proves the system has a good human machine interface,reasonable structure, perfective function and control effect meets the demands.