Yang Yanzhu

Analysis and Improvement Method of the Dynamic Response of Electromagnetic Clutch Used in the Tufted Carpet Jacquard

For a tufting machine, the electromagnetic clutch is required to be switched frequently and response quickly during the jacquard process. By the analysis on the effect to the jacquard process of the response characteristic of electromagnetic clutch, it shows that the torsion rising time is a main factor affecting the difference of yarn feeding and the quality of tufted carpet. An improvement method of the dynamic response of electromagnetic clutch is proposed in this paper. In this method, Taylor series expansion is used to get the exciting voltage curve, then the current response is accelerated and the torsion rising time is decreased by varying the exciting voltage of the clutch. The modeling and simulation of the method is processed by MATLAB/SIMULINK. Then a single-chip system is designed to achieve the exciting voltage by PWM. The results of the simulation and experiment show that the response of the clutch is more quickly and the current response is more steadily. High quality tufted jacquard carpet is produced by the application of this method.