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DOI: 10.15507/2658-4123.036.202602.344-366

UDK 621.313.13/.17:634

 

Assessing the Effect of the Number of Stator Non-Magnetic Spacers on Armature Pulling Force of Pruner Linear Motor

 

Gennady V. Nikitenko
Dr.Sci. (Eng.), Professor, Head of the Department of Electrical Equipment and Power Supply of the Agro-Industrial Complex, Stavropol State Agrarian University (12 Zootekhnichesky Lane, Stavropol 355035, Russian Federation), ORCID: https://orcid.org/0000-0003-2797-0755, Researcher ID: N-1769-2014, Scopus ID: 57202640003, SPIN-code: 9068-0520, This email address is being protected from spambots. You need JavaScript enabled to view it.

Sergey N. Antonov
Cand.Sc. (Eng.), Associate Professor, the Department of Electrical Equipment and Power Supply for the Agricultural Sector, Stavropol State Agrarian University (12 Zootekhnichesky Lane, Stavropol 355035, Russian Federation), ORCID: https://orcid.org/0000-0001-8931-269X, Researcher ID: V-1081-2017, Scopus ID: 57021226800, SPIN-code: 2575-3686, This email address is being protected from spambots. You need JavaScript enabled to view it.

Nikita S. Garkavenko/strong>
Post-Graduate Student of the Department of Electrical Equipment and Power Supply for the Agricultural Sector, Stavropol State Agrarian University (12 Zootekhnichesky Lane, Stavropol 355035, Russian Federation), ORCID: https://orcid.org/0009-0009-5948-391X, Researcher ID: KCR-2037-2024, SPIN-code: 8319-7266, This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Abstract
Introduction. Horticulture is one of the leading areas of agriculture, which has been demonstrating the increase in quantity and quality of products in recent years. To ensure long-term stability, it is necessary to modernize the technical and technological systems used for tree pruning. Currently, the ratio of manual and mechanized labor is 80 to 20%. High labor intensity when using manual or lever-driven pruners causes inefficiency of their use and low productivity of the operator. The most relevant is the development of pruning devices driven by a linear electric motor.
Aim of the Study. The study is aimed at determining the effect of the number of non-magnetic stator spacers and their geometric dimensions on the armature pulling force.
Materials and Methods. The subject of the study is the magnetic system of a linear electric motor. There have been determined the design characteristics of the magnetic system affecting the main parameter of the linear electric motor operation – armature pulling force. The study was conducted using the laws of electromechanics, the electrical engineering theoretical fundamentals, and computer modeling methods.
Results. During computer modeling of the magnetic system, the length of the non-magnetic stator spacers changed from 8 to 18 mm and the number of spacers changed from 1 to 5 pcs. There have been found the dependences of the change in pulling force, the range of speed variation during armature movement on the length and number and of the non-magnetic spacers. In examining a non-magnetic spacer of 8 mm, it was found that the maximum armature pulling force of 50 N was achieved in 3 ms and for a non-magnetic spacer of 18 mm, the maximum pulling force is 40 N in 12 ms.
Discussion and Conclusion. Decreasing the length of the non-magnetic stator spacers and increasing their number, leads to increases in the armature pulling force resulting in increased operation speed and improved quality of the branch cut surface. It is recommended to use the presented results for designing a linear electric drive for hand tools. Future studies suggest studying the influence of the shape of non-magnetic and magnetic spacers on the armature pulling force.

Keywords: linear electric motor, magnetic system, armature pulling force, horticulture, tree pruning, electric tool

Conflict of interest: The authors declare that there is no conflict of interest.

For citation: Nikitenko G.V., Antonov S.N., Garkavenko N.S. Assessing the Effect of the Number of Stator Non-Magnetic Spacers on Armature Pulling Force of Pruner Linear Motor. Engineering Technologies and Systems. 2026;36(2):344–366. https://doi.org/10.15507/2658-4123.26362.344-366

Authors contribution:
G. V. Nikitenko – formulating the study ideas, aims and objectives.
S. N. Antonov – developing the study methodology; creating models.
N. S. Garkavenko – conducting the study, specifically performing the experiments, or collecting data/evidence.

All authors have read and approved the final manuscript.

Submitted 29.09.2025;
revised 09.02.2026;
accepted 27.02.2026

 

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