Automatic unwinding tension controller CN2381624Y

The automatic unwinding tension controller is a controller for adjusting the roll of paper and plastic film, the amount of unwinding tension in the automatic feeding process, and making it stable. This controller includes a PI control circuit, a linear delay amplification circuit, a comparison circuit, a modulation circuit, a triangular wave generator, a power amplifier circuit, a tension detection circuit, a tension setting circuit, a current feedback circuit, a moderate adaptive circuit, a manual amplification circuit, and the like. Because the controller adopts a pulse width modulation structure with double reference and double closed loop feedback, the adjustment is convenient, the reliability is high, the control accuracy is high, and the unwinding tension can be kept stable. The automatic unwinding tension controller is an automatic unwinding tension control system that is convenient, practical and excellent in performance. (Packaging World)