The paper deals with the special features of the joint use of the genetic and stochastic approaches to the assessment of the processes of aging of various electric machines provided that inherited and acquired defects of the structural units are present. The authors expanded the notion of electric machine aging from the point of view of the application of the genetic approach. They offer the approach to the assessment of the degree and the special features of aging of the basic types of electric machines taking into account the interrelation between their main parameters and loads when the properties of the main unit materials alter in time. The obtained results make it possible to relate the aging symptoms to the alteration of the electric machine basic parameters determining the conditions of its use in production.
Słowa kluczowe: electric machine, aging, reliability, energy efficiency, genetic approach, defect .
Przedstawiono specjalne właściwości połączenia podejścia genetycznego i stochastycznego do oceny procesów starzenia maszyn elektrycznych, w których istnieją wady konstrukcyjne i nabyte w trakcie eksploatacji. Autorzy rozszerzyli pojęcie starzenia się maszyn elektrycznych z punktu widzenia podejścia genetycznego. Zaoferowano podejście do oceny stopnia starzenia maszyn elektrycznych, biorące pod uwagę związki miedzy ich głównymi parametrami i obciążeniami przy zmiennych w czasie właściwościach materiałowych. Otrzymane wyniki umożliwiają odniesienie symptomów starzenia do zmienności podstawowych parametrów maszyn elektrycznych, co pozwala określić warunki produkcji.
Keywords: maszyna elektryczna, starzenie, niezawodność, skuteczność energetyczna, podejście genetyczne, uszkodzenie
Flexibility is one of the main features of contemporary production. First of all, it means a capability to quickly readjust to the issue of a new product. In this case, it is necessary to meet a number of basic requirements to the technological equipment foremost determining its efficiency and reliability indices. As a rule, the most part of this equipment is partially or completely automated. This, along with the use of control facilities, implies the presence of controlled devices, first of all, various electric machines (EM). They chiefly determine energy consumption and partially - the reliability of the whole equipment. Having comparatively long mean-timebetween failures, most often, such EMs are not subject to change during the modernization of the equipment . However, everybody knows that their parameters and characteristics deteriorate during long-term operation and repairs due to their aging . Nowadays universal approaches to the analysis of aging processes in technical systems, including EMs, are practically absent. The idea of EM aging did not widely spread in the technical and research literature because of the impossibility of its exact description and mathematical representation. However in this case we can consider it as partial loss of the properties and characteristics by the basic structural materials, elements and whole EMs under the influence of external factors occurring in the process of operation and repairs with the course of time. As the final stage of this process is of little practical interest, one can consider the moment of time when EM does not provide the required technological conditions or when the expenditure on their operation essentially influences the cost of the issued product to be the limit of aging. Thus, the substantiation of the principles of taking into account the processes of EM aging is an important scientific-research problem. In the future, it will enable forecasting [...]
 Kotelenets N. F. , Kuznetsov N. L. . Testing and reliability of electric machines, Moscow, Vysshaia shkola, (1988), (in Russian).  Hamid A. Tol i ya t , Subhasis Nandi , Seungdeog Choi, Homayoun Meshgin-Kelk. Electric Machines: Modeling, Condition Monitoring and Fault Diagnosis, CRC Press, October 30, (2012).  Voldek А. I. Electric machines: Textbook for higher ed. estab. - 3rd ed., revised. - L.: Energiia, (1978).  V. V. Prus, M. V. Zagi rnyak, I. A. Kolotylo, D. Mi l javec , Estimate and taking into account change of steel losses in induction motors in process of their aging. Proceedings of International IEEE Conference EUROCON 2009, Saint Petersburg, Russia, (2009), 790-795.  Shynkarenko V.F. , Chumak V.V. The concept of the theory of genetic reliability of electromechanical objects. Materials of intern. research-techn. conf. “The problems of the improvement of the efficiency of electromechanical convertors in electrical energy systems", city. Sevastopil, 17 - 20 September 2012. - Sevastopil, Ukraine, (2012), 3-7. (in Russian).  Goldberg О. D. et al. Electric machine design. - M.: MGOU, 2001. - 161 p. (in Russian).  Zagi rnyak М. V., Prus V. V., Nevzlin B. I. Estimation of electric machines and their series using parameter functional dependences on the generalized linear size, Technical Electrodynamics, No. 5, (2013). 32-40. (in Russian).  Preobrazhenskii А . А . , Bishard Е . А . Magnetic materials and elements. Textbook for higher ed. estab. students in spec. "Semiconductors and dielectrics". - 3-rd ed, revised and expanded. - М.: Vysshaia shkola, (1986). (in Russian).  M. Zagi rnyak , V. Prus , Use of neuronets in problems of forecasting the reliability of electric machines with a high degree of mean time between failures, Przeglad Elektrotechniczny (Electrical Review), R. 92 № 1, (2016), 132 - 135.