- Tytuł:
-
Ocena ciepłoodporności przewodów emaliowanych metodami analizy termicznej
Assesment of thermal endurance of enameled wires using thermal analysis methods - Autorzy:
-
Górecki, L.
Górnicka, B. - Powiązania:
- https://bibliotekanauki.pl/articles/1372633.pdf
- Data publikacji:
- 2011
- Wydawca:
- Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
- Tematy:
-
przewód emaliowany
materiały elektroizolacyjne
ciepłoodporność
izolacja
emalia
analiza termiczna - Opis:
- The long-term investigations are required to determine the thermal endurance of enamelled wires on the basis of Temperature Index (TI). The fast assessment of thermal properties is often necessary, especially when the new materials are developed. In this case thermal analysis methods can be very useful. The thermogravimetric (TGA) and differential scanning calorimetry (DSC) analysis of the various winding wire enamels are presented. It was found that the sample conditioning by exposure to temperature of the declared TI during 50 hours enable the proper classification in the respect to the thermal endurance. Additionally the TGA/DSC investigations of the poliamide-imide enamel after various periods of ageing in 280 °C and 290 °C were performed and lifetimes of the enamel in these temperatures were determined. The exothermic peak temperatures on the DSC curves were determined. It has been stated that the peaks shift in the lower temperatures direction after exceeding the lifetime. The degradation temperatures were determined from the loss weight (TG) curves. It was proved that the degradation temperature stabilizes after attaining the enamel lifetime. Furthermore, while unaged enamel shows no residue mass (enamel combusts in air atmosphere), the residue mass of aged enamel gradually increases, even to 27%, due to penetration of the cupper ions from wire during ageing.
- Źródło:
-
Maszyny Elektryczne: zeszyty problemowe; 2011, 3, 91; 75-79
0239-3646
2084-5618 - Pojawia się w:
- Maszyny Elektryczne: zeszyty problemowe
- Dostawca treści:
- Biblioteka Nauki
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