Ocena ciepłoodporności przewodów emaliowanych metodami analizy termicznej

• Autorzy: Górecki L. , Górnicka B.

Warianty tytułu

EN

Assesment of thermal endurance of enameled wires using thermal analysis methods

• Języki publikacji: PL

Abstrakty

EN

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.

Słowa kluczowe

PL

przewód emaliowany; materiały elektroizolacyjne; ciepłoodporność; izolacja; emalia; analiza termiczna

• Wydawca: Sieć Badawcza Łukasiewicz - Górnośląski Instytut Technologiczny
• Czasopismo: Maszyny Elektryczne : zeszyty problemowe
• Rocznik: 2011
• Tom: Nr 3(91)
• Strony: 75--79
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Górecki L.

autor

Górnicka B.

• Instytut Elektrotechniki, Wrocław

Bibliografia

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• [2]. Aymonino F., Lebey T., Malec D., Petit C., Saint Michel J., Anton A., Gimenez A. Degradation and dielectrics measurements of rotating machines insulation at high temperature (200-400°C), 2007 International Conference on Solid Dielectrics, 2007, pp. 130-133.
• [3]. Mans D., Thermal endurance of rotor turn insulation materials, IEEE International Symposium on Electrical Insulation, 2006, pp. 21-24.
• [4]. Yingsuo Z., Yi B., Quixing X., Zhiping Z., Evaluation of thermal life for composite dielectrics, IEEE Electrical Insulation Magazine, 1999, pp.12-191. Saccani A.., Motori A., Patuelli F., Thermal endurance Evaluation of Isotactic poly(propylene) based nanocomposites by short-therm analytical methods, IEEE Transactions on Dielectrics.
• [5]. Li F., Xu X., Li Q., Li Y., Zhang H., Yu J., Cao A., Thermal degradation and their kinetics of biodegradable poly(butylene succinate-co-butylene terephthate)s under nitrogen and air atmospheres, Polymer Degradation and Stability 91, 2006, pp. 1685-169.
• [6]. Yingsuo Z., Yi B., Quixing X., Zhiping Z., Evaluation of thermal life for composite dielectrics, IEEE Electrical Insulation Magazine, 1999, pp.12-191.
• [7]. Aoyagi Y., Yamashita K., Doi Y., Thermal degradation of poly[(R)-3-hydroxybutyrate], poly[d-caprolactone], and poly[(S)-lactide], Polymer Degradation and Stability, Volume 76, Number 1, 2002, pp. 53-59.
• [8]. Budrugeac P., Segal E., The application of the thermogravimetric analysis (TGA) and of the differential thermal analysis (DTA) for rapid thermal endurance testing of electrical insulating materials, http://gw- chimie. math. unibuc. ro/ anunivch /2005- 2/AUBCh2005XIV2241246.pdf.
• [9]. Araki C., Taguchi T., Thermal Degradation of Polyesterimide Magnet Wire, Electrical Insulation and Dielectric Phenomena, 1993. Annual Report. Conference on Volume , Issue , 1993, pp. 526 – 531.