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Dielectric properties of epoxy resins
Matoušová, Klára ; Novák, Vítězslav (referee) ; Kazelle, Jiří (advisor)
This diploma thesis deals with the fundamental properties of epoxide mixtures, as determining of these fundamental properties of epoxide mixtures could in the case of favorable results lead to diminishing the amount of defects in epoxide-embedded instrument transformers. As the influence of effects in the manufacturing process of transformers causing poor quality is very extensit, the biggest emphasis is laid capitally on the influence of the epoxide casting mixture composition. The thesis describes the manufacture technology including used methodics and materials. The compositions of epoxide resins and the mechanisms of their curing. Also, the definitions of fundamental properties of dielectric materials and the description of diagnostic methods used to relative permitivity, dissipation factor and inner resistivity are included. suitable casts of acquired samples were set and dried out within the experimental part, followed by measurement of fundamental electrical properties in temperature and frequency relations. Hereafter a comparison of individual samples and the evaluation of their electrical properties will be carried out.
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Analysis of errors in the manufacturing process and their elimination
Kolář, Ladislav ; Fiala, Alois (referee) ; Koška, Petr (advisor)
My thesis presents the process of electromagnet production, including how the process is organised. My goal is to improve these techniques by refining them. To obtain the required data, the company's records were extracted and measurements were taken directly from the manufacturing process. Through examination of the data, any processes which created financial or temporal deficits were identified. Conclusions were then offered to solve these problem areas. These mainly involve alterations to the machinery settings, the delivery of materials and the management of production.
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Electrical properties analysis of epoxy resins with various fillers
Horák, Luděk ; Kazelle, Jiří (referee) ; Frk, Martin (advisor)
Presented bachelor thesis is focused on studying electroinsulating epoxy resin-based sealings. It describes the chemical composition, production, properties and measuring methods of basic electric quantities of these materials. This work also embodies a preparation of composite epoxy resin samples with different kinds of micro-ground siliceous sand as a filling. The samples given are measured on the temperature dependency of relative permitivity, dissipation factor and inner resistivity.
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Dielectric properties of epoxy resins
Matoušová, Klára ; Novák, Vítězslav (referee) ; Kazelle, Jiří (advisor)
This diploma thesis deals with the fundamental properties of epoxide mixtures, as determining of these fundamental properties of epoxide mixtures could in the case of favorable results lead to diminishing the amount of defects in epoxide-embedded instrument transformers. As the influence of effects in the manufacturing process of transformers causing poor quality is very extensit, the biggest emphasis is laid capitally on the influence of the epoxide casting mixture composition. The thesis describes the manufacture technology including used methodics and materials. The compositions of epoxide resins and the mechanisms of their curing. Also, the definitions of fundamental properties of dielectric materials and the description of diagnostic methods used to relative permitivity, dissipation factor and inner resistivity are included. suitable casts of acquired samples were set and dried out within the experimental part, followed by measurement of fundamental electrical properties in temperature and frequency relations. Hereafter a comparison of individual samples and the evaluation of their electrical properties will be carried out.
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Mechanical properties of biocomposites
Janošík, Petr ; Valášek, Petr (advisor) ; Müller, Miroslav (referee)
Goal of this diploma thesis was to describe mechanical properties of epoxy resins containing organical fibers and to experimentally evaluate the effect of the fiber length with various concentrations on final mechanical property of composit material. First part of the diploma thesis is dedicated to literature review which describes general properties of fiber composites, materials which they are made of, and mechanical trials. In chapter called Methodics, materials used for experimental research are described. Process of sample preparation and mechanical trials, which were used for the test, are also described there. Last part of the diploma thesis is dedicated to evaluation of results of executed mechanical trials on composites with fiber support of various lengths and concentrations
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Electrical properties analysis of epoxy resins with various fillers
Horák, Luděk ; Kazelle, Jiří (referee) ; Frk, Martin (advisor)
Presented bachelor thesis is focused on studying electroinsulating epoxy resin-based sealings. It describes the chemical composition, production, properties and measuring methods of basic electric quantities of these materials. This work also embodies a preparation of composite epoxy resin samples with different kinds of micro-ground siliceous sand as a filling. The samples given are measured on the temperature dependency of relative permitivity, dissipation factor and inner resistivity.
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|
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Analysis of errors in the manufacturing process and their elimination
Kolář, Ladislav ; Fiala, Alois (referee) ; Koška, Petr (advisor)
My thesis presents the process of electromagnet production, including how the process is organised. My goal is to improve these techniques by refining them. To obtain the required data, the company's records were extracted and measurements were taken directly from the manufacturing process. Through examination of the data, any processes which created financial or temporal deficits were identified. Conclusions were then offered to solve these problem areas. These mainly involve alterations to the machinery settings, the delivery of materials and the management of production.
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