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Polymers are the preferred materials for use in electrical applications and for power electronics due to their simple of production, light weight and low cost. However, polymers have relatively low thermal conductivity. This paper deals with preparation of epoxy composites with content of micro-filler of aluminum oxide (Al2O3) with high thermal conductivity. Using specific fillers can improve performance...
The electrcal-insulation systems (EIS) of the electrical rotating machines have excellent electrical insulating and mechanical properties, but have a relatively low value of thermal conductivity. This work describes how micro fillers of aluminum oxide (Al2O3) can affect the thermal properties. Thermal conditions in the electrical rotating machine were modeled by finite element method 2D SW FEMM. The...
Electrical insulation system is an important part of electrical equipment with high requirements — accuracy, quality, reliability and environmental protection. In power and distribution transformers is the most common electrical insulating system oil-paper system. The liquid component of the insulation system is used as a cooling and insulating medium as well. The most commonly used liquid insulating...
This article describes how nano and micro fillers can affect the properties of electrical insulation systems and heat transfer in electrical devices. Using specific fillers can improve performance parameters of electrical equipment without the design changes. It is important matter to study and mathematically describe the processes in high-voltage insulation systems, search for new materials which...
Development of new material contributes to increasing the load of electric machines, while maintaining the dimensions. This article examines the influence of the material properties of the components of induction motor to its warming. The work carried out thermal calculation asynchronous traction motor. The calculation results are verified by measurements on existing machines. These measurements led...
There are only a few materials that are promising composites. For decades high-voltage electrical insulation technology used ternary insulation systems; usually based on modified epoxy resins and reconstructed mica. Adding additional components into existing systems, it is possible to influence their properties. However, the disadvantage is an inhomogeneous composite structure that emerges from the...
This paper focused on modified resin that contain epoxy matrix on base improving the thermal conductive, a new composite system was designed by applying new phase represented by the nano or microparticles of silica. In this paper, low quantities bisphenol A (DGEBA) with diamine crosslinker (Laromin C260). In order to assess the challenge of improving the electrical properties while not changing or...
This article describes the influence of thermal material properties on the properties of electrical insulation materials and heat transfer in electrical devices. When increasing performance and decreasing dimensions of electrical equipment the losses grow. It is necessary to search new materials which can fulfill greater demands. Thermal properties of materials are one group of important aspects....
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