The identification of the parameters of power electrical equipment for pipe cold rolling mills

This article studies the parameters of power electrical equipment for equipment with complex and non-standard kinematics of working bodies. It analyses the operation features for a cold-rolling pipe mill and the design problem of electric drive systems. The advantages of a field-regulated reluctance machine are substantiated considering the peculiarities of the technological operations and equipment. Motor electromagnetic torque is used as a criterion for the geometry optimization problem. The mechanical stresses calculation of the proposed rotor design for given speeds and loads is performed. The influence of a “jumper” in the radial direction on the strength of the machine rotating parts is shown. The multi-criteria optimization task for the configuration of power circuits is carried out according to capital costs and reliability. The effectiveness of a six-phase three-level electrical converter is substantiated. The operation speed of the electric drive of the auxiliary mechanism is increased almost threefold, and the performance of cold-rolling pipe mill is improved by 10-15 %. Power circuit configuration for multilevel electric converter ensures a reduction of losses by 1 %.