The external magnetic field of electrotechnical complexes elements with a shell having a finite magnetic permeability

The current stage of electrotechnical systems development is characterized by the complexity and diversity of the constituent elements, as well as increased requirements to their efficiency and reliability. Most of the energy converters for many years operate in various climatic conditions and are exposed to external and internal influences of an electromagnetic and mechanical nature. Failures of the electrical complexes elements cause significant material damage. Therefore, measures to ensure smooth operation, detection and assessment of the defects development degree, especially at an early stage of their development, the emergency failures prevention and the technical condition prediction for a long period of electrical complexes elements are therefore relevant. One solution to this problem is the functional diagnostics, allowing the use of a maintenance and repair system on the actual condition. Analysis of the external magnetic field structure allows to reliably and objectively assess the technical condition of the electrical complexes elements. In this regard, the authors developed an external magnetic field mathematical model of the electrotechnical complexes elements (in particular, electromechanical) with a shell having a finite magnetic permeability. Research results are presented.