Modelling the load torques of electric drive for polymerization process

摘要

The problems of mathematical modelling the load torques on shaft of driving motor designed for applications inpolymerization reactors are presented in the paper. The real load of polymerization drive is determined as a function ofangular velocity. Mentioned function results from friction in roll-formed slide bearing as well as from friction of ethylenemolecules with mixer arms in polymerization reactor chamber. Application of mathematical formulas concerning thecentrifugal ventilator is proposed to describe the mixer in reactor chamber. The analytical formulas describing the real loads ofpolymerization drive are applied in mathematical modelling the power unit of polymerization reactor with specially designedinduction motor. The numerical analysis of transient states was made on the basis of formulated mathematical model.Examples of transient responses and trajectories resulting from analysis are presented in the paper.