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ArticleName Gearless modular electric drive of a conveyor roaster
DOI 10.17580/tsm.2023.05.12
ArticleAuthor Kurilin S. P.

Smolensk Branch of the National Research University Moscow Power Engineering Institute, Smolensk, Russia:

S. P. Kurilin, Professor at the Department of Electromechanical Systems, Doctor of Technical Sciences, Professor, e-mail:


Improving the reliability of conveyor roasters is a relevant research and engineering problem. Analysis shows that the least reliable links of the electric drive of a roaster include the electric motor and the motor speed reduction system. The advantage of a gearless modular electric drive is that it does not need the speed reduction system. At the same time, the modular design helps separate the torque components and thus ensures power back-up and increased reliability. The authors designed a gearless modular electric drive consisting of 12 linear traction modules. The paper describes a design of the linear traction module with a traction force of 9.1 kN and a speed of the secondary element of 9.04 m/min. A combination of 11 such modules ensures that the drive pulley had the required torque of 480 kNm and the speed of 0.3 min–1. The twelfth linear traction module is responsible for the high-speed operation and is used as a spare one. The specification of the gearless modular electric drive included in this paper gives more details about its static and dynamic properties. The low speed of the drive pulley entails a low overload capacity of the unit in view, which may trip the conveyor if the load increases considerably. The said drawback can partially be eliminated by switching over to the high-speed mode and on a broader scale – by increasing the power of the linear traction modules. In the case of the OK-306 roaster, the use of a gearless modular electric drive and the resulting increased reliability would save 3.22 mln Rub/h. The modular design of the drive secures the availability of the conveyor roaster saving the need for a spare electric drive.
Support for this research was provided under Grant No. 22-61-00096 by the Russian Science Foundation,

keywords Conveyor roaster, gearless modular electric drive, linear traction module, design, mathematical modelling, specification

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