Dynamic model of electromagnetic hammer for crushing oversized rocks

One of the trends in advancement of percussive machines for crushing oversized rocks is the use of electromagnetic hammers as attached implements. The benefit of equipment powered by energy of magnetic field is the structural simplicity and operational reliability in different climatic conditions, including the Far North, as well as the comparatively high efficiency of impact energy transmission. A feature of electromagnetic hammers is the transient behavior, which complicates the rational selection of their basic design parameters. The recent design methods are approximate and mostly use static approaches. The relevance of the present research is defined by the promising application of the electromagnetic hammers in crushing oversized rocks, and by the required improvement of their rational design methods. This article describes development of a dynamic simulation model of an electromagnetic hammer with the piston position coordinate control. The dynamic model of the electromagnetic hammer is created using the structural modeling techniques in Matlab Simulink, with some numerical methods involved. In calculation of complex electromechanical processes, the model enables simultaneous analysis of operation of all hammer subsystems in time and in space, and allows just-in-time adjustment of the main structural parameters of the hammer, which improves the design quality. The quantification of the simulation modeling results is presented. It is emphasized that it is expedient to implement adjustment of the kinetic energy of the hammer by its piston position during the power stroke.

Neyman L. A., Neyman V. Yu. Dynamic model of electromagnetic hammer for crushing oversized rocks. MIAB. Mining Inf. Anal. Bull. 2025;(2):145-156. [In Russ]. DOI: 10.25018/0236_1493_2025_2_0_145.

L.A. Neyman¹, Dr. Sci. (Eng.), Professor, e-mail: neyman31@gmail.com, ORCID ID: 0000-0002-3442-6531,
V.Yu. Neyman¹, Dr. Sci. (Eng.), Head of Chair, e-mail: nv_nstu@mail.ru, ORCID ID: 0000-0002-8433-1610,
¹ Novosibirsk State Technical University, Novosibirsk, 630073, Russia.

V.Yu. Neyman, e-mail: nv_nstu@mail.ru.

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