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| Author(s): |
Guilherme Origo Fulop
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Lorena. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de Lorena (EEL/ASDI) |
| Defense date: | 2018-03-02 |
| Examining board members: |
Cristina Bormio Nunes;
Inácio Bianchi;
Fernando Jose Gomes Landgraf;
Maria José Ramos Sandim
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| Advisor: | Cristina Bormio Nunes |
| Abstract | |
The present research had as focus a problem that is becoming very serious nowadays, since with the growth of urban areas, some households are approaching the power transformers. Power transformers are machines whose function is to increase or decrease the potential difference of a power grid, but they generate a significant level of noise, which can be harmful to human health. This noise is created by the magnetostriction of the Fe-Si plates that compose the core. Thus, the purpose of this research was to study two Fe-Ti alloys to investigate their magnetostrictive behavior. In addition, it is important to study the magnetic properties of these alloys in order to analyze the magnetic losses associated with these samples. Therefore, measurements of magnetic induction, magnetic permeability and electrical resistivity were also made. Were made analyzes of scanning electron microscopy to investigate the size and morphology of the grains, X-ray diffraction, to identify the phases that are present in the material and electron backscatter diffraction to identify the texture.These characterizations were made for the Fe-Ti alloys and a commercial grain-oriented Fe-Si alloy. The results were compared to each other. Fe-Ti alloys showed lower magnetostriction values than the Fe-Si alloy, however they presented highest values of magnetic losses. As a result, it was possible to make a first analysis of the Fe-Ti alloys properties, creating several possibilities for future studies in order to improve Fe-Ti alloys properties. (AU) | |
| FAPESP's process: | 15/25461-6 - Studies of Fe-Ti rolled alloys for use in electrical machines |
| Grantee: | Guilherme Origo Fulop |
| Support Opportunities: | Scholarships in Brazil - Master |