Ferromagnetic materials may be affected by the presence of local losses due to defects or magnetic anomalies caused by machining processes. To highlight such anomalies is not easy; a noninvasive thermographic method has been refined to allow a proper comparison of different machining processes' impact on the iron losses. Specimens obtained with punching, wire erosion, and laser cut have been analyzed using a high-speed IR camera when subjected to alternate magnetization at different frequencies. Also, the same technique has been adopted to the assembled stacks to investigate more simultaneous phenomena. The possibility to point out localized anomalies should be exploited to foresee and avoid electrical machines core faults.

A Thermographic Method to Evaluate Different Processes and Assembly Effects on Magnetic Steels / Poskovic, E; Ferraris, L; Bramerdorfer, G; Cossale, M. - In: IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS. - ISSN 0093-9994. - ELETTRONICO. - 58:3(2022), pp. 3405-3413. [10.1109/TIA.2022.3149462]

A Thermographic Method to Evaluate Different Processes and Assembly Effects on Magnetic Steels

Poskovic, E;Ferraris, L;
2022

Abstract

Ferromagnetic materials may be affected by the presence of local losses due to defects or magnetic anomalies caused by machining processes. To highlight such anomalies is not easy; a noninvasive thermographic method has been refined to allow a proper comparison of different machining processes' impact on the iron losses. Specimens obtained with punching, wire erosion, and laser cut have been analyzed using a high-speed IR camera when subjected to alternate magnetization at different frequencies. Also, the same technique has been adopted to the assembled stacks to investigate more simultaneous phenomena. The possibility to point out localized anomalies should be exploited to foresee and avoid electrical machines core faults.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2972034