Energy-efficient modular electric motor for low-speed ferrous metallurgy units

The study is aimed at upgrading electric drives of low-speed process units in ferrous metallurgy, such as rotary kilns, converters, roasting and sintering machines. The overall objective of the study is to increase the efficiency and reliability of electric drives of the units. The objective is achieved by partially transferring the speed reduction function to a special electric motor, as well as by implementing the modular principle of constructing the electric motor. The applied task of the study is to develop an energy-efficient modular electric motor for the electric drive of the OK 306 roasting machine. The task is solved by model design and comparison of the parameters of alternative versions of the electric motor. The modular electric motor consists of several traction linear modules operating on a common secondary element. The design of the electric motor is described and the design data of the traction linear module are presented. Based on the design results, data on four versions of the traction linear module for a gearless and geared electric drive with different values of torque and speed are obtained and presented. The basic version of the design provides the efficiency of the electric drive up to 49 %, which is 1.7 times higher than the efficiency of the existing electric drive. The analysis and discussion of the technical data of the basic version of the electric motor is carried out. It is stated that the designed electric motor has high technical and energy indicators, allowing it to compete with the serial electric motor of the basic electric drive. The competitive advantage of the developed electric motor also lies in its reliability, inherent in the modular design principle in combination with high overload capacity. A comparative assessment showed that the implementation of the developed electric motor in the electric drive of the incineration machine gives a significant economic effect, estimated at 3.22 million rubles.The study was supported by the grant of the Russian Science Foundation No. 22-61-00096, https://rscf.ru/project/22-61-00096/.