МЕТОДИ РОЗРАХУНКУ ТЕПЛОПРОВІДНОСТІ ЕЛЕКТРИЧНИХ МАШИН
METHODS OF CALCULATION OF HEAT CONDUCTIVITY OF ELECTRICAL MACHINES
Сторінки: 232-234. Номер: №3, 2019 (273)
Автори:
Д.Ю. ЗУБЕНКО, О.М. ПЕТРЕНКО, В.В. ЛІНЬКОВ
Харківський національний університет міського господарства імені О.М. Бекетова
D.U. ZUBENKO, O.M. PETRENKO, V.V. LINKOV
O.M. Beketov National University of Urban Economy in Kharkiv
DOI: https://www.doi.org/10.31891/2307-5732-2019-273-3-232-234
Рецензія/Peer review : 16.05.2019 р.
Надрукована/Printed : 03.06.2019 р.
Анотація мовою оригіналу
У цій статті розглядається питання методів розрахунку теплопровідності електричних машин з використанням нового пористого матеріалу. Представлена спрощена модель структури і тепловий опір основних елементів електричних машин. Результат розрахунку перевіряються плоскою моделлю двошаровою теплопровідністю, яка заснована на експериментах і електромагнітному моделюванні. Моделі теплового стану отримані за допомогою паралельних методів і класичним методом оцінки.
Ключові слова: електрична машина, електродвигун, діагностика, методи теплового контролю, нейронні мережі.
Розширена анотація англійською мовою
In this paper, Metal examines the question of methods for calculating the thermal conductivity of electric machines. A simplified model of structure and thermal resistance of the main elements of electric machines is presented. The result of the calculation is verified by a flat model of two-layer heat conductivity, which is based on experiments and electromagnetic modelling. Models of the thermal state are obtained using parallel methods and the classical method of evaluation. For such requirements, more accurate thermal models are needed that integrate the thermal properties of the material (electrical insulating and magnetic materials) to accurately imagine the behaviour of the system. For such requirements, more accurate thermal models are needed that integrate the thermal properties of the material (electrical insulating and magnetic materials) to accurately imagine the behaviour of the system. In a thermal study, one of the main problems of electric machines is their materials, of which it is the most vulnerable component, such as insulating materials. Winding of electric machines can be damaged or reduce the service life if the heat limit for the material is exceeded. However, as the slots are filled with composite materials, such a real slot model is difficult to install. The prediction of the thermal conductivity (PFC) using a number of tools, such as the finite element method (ICE), will result in excessive simulation time. Excitation winding where the side of electric machines is usually hidden in a closed room using an epoxy resin (mainly in special linear motors) or varnish (mainly in rotary engines), copper conductors are isolated from each other. Moreover, the enamel wire outside the copper conductor, the insulating paper slot is filled to increase the insulation. Also, different from porous materials, the component of metal and gas in porous materials may be replaced by equivalent insulation and copper wires, respectively. In addition, there is no fluid in the thermal transfer between them, porosity can not be replaced by a wire without isolation. Therefore, the actual task of developing a mathematical model of thermal conductivity in electric machines with different types of insulation.
Key words: electric machine, electric motor, diagnostics, methods of thermal control, neural networks.
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