Investigation of electromagnetic field patterns of electromechanical transducers of rotary type

Аuthors

Ilyuhina N. S.^*, Frolov A. A.^**, Iluhin A. S.

Tula State University, TulGU, 92, Lenin av., Tula, 300012, Russia

*e-mail: nsi-il@yandex.ru
**e-mail: neymles@rambler.ru

Abstract

This work aims at the analysis of the rotary electromagnet structure through the research of electromagnetic field patterns by finite element method. Based on the results of the analysis we built a general equivalent circuit of a magnetic circuit, enunciated assumptions necessary to build non-linear mathematical model as well as electromagnet of rotary type design.

The analysis of numerical values streams obtained as a result of electromagnetic field modelling in a system with neutral electromagnets shows that in most cases stray and bulging fluxes appear to be commensurable with working fluxes, and, thus, they need to be taken into account when calculating the static and dynamic characteristics. In the electromagnet under consideration, the stray flux is almost constant during the movement of the armature. It allows supposition on stray conductivity uniformity.

On the basis of the analysis of electromagnetic fields patterns and assumptions, we build a non-linear the electromagnet mathematical model.

Research of electromagnet dynamic characteristics was carried out numericaly using non-linear model for ambient temperature vatiation of ± 50°С and power source voltage within the specified tolerance range.

Mathematical model obtained and developed software can be implemented to analyse currently available as well as newly designed electromagnets. The developed mathematical model takes into account the peculiarities of magnetic field configuration of each electromagnet design implementation.

Keywords:

the electromechanical tramsducer, an electromagnet of rotary type, an electromagnetic steering gear, eddy currents, finite elements method, electromagnetic fields patterns

References

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