The optimum path of position electric drive

The article identifies the optimal path of position electric drive on the example of the pipe cold rolling mill feeding mechanism. It is shown that the optimum speed curve has a triangle form, and its aspect ratio depends on the load diagram, in particular on the influence of roll mill main drive and doesn’t depend on the yawn and system elasticity presence. This analytically proved thesis is verified by the results of the mathematical modelling with consideration of the main drive influence on the feeding drive. Statistical analysis of the waveforms taken on the real object allowed to recommend the optimal mill HPT-450 feeding mechanism electric drive control. On the assumption of the obtained data that load-on torque caused by the pipe encounter to the rolling mill rolls, takes place in the interval of (0.6…0.75)t cycle, recommended starting time for the deceleration time ratio is 2:1. Path optimization carried on allows to get up to 25 % more rms torque during the feeding cycle, so increasing the productivity of the mill.