Study of Synchronous Automatic Speed Control System Based on the Motors Driving Conveyer

Because of the asynchronousy of the control system caused by internal tension imbalance in the running of tri-motors driving conveyance line, this paper mainly discuss a practical program - synchronous automatic speed control system. In this system, the rotary encoder is adopted to detect the motors´ speed, samples and analyses various motor speeds through the PLC and adjusts the motors´ speed by automatic frequency converter, so the line of the drives-electrical are restored to balance. The designed system infinitely approaches synchronization of the ideal state step by step, and maintains stability in the error limits permitted.