0011-4561 Multicriteria diagnosis of synchronous machine using the welch method Multicriteria diagnosis of synchronous machine using the welch method Ferreira José Gregorio author Sobczyk Tadeusz J. author Warzecha Adam author Faculty of Electrical and Computer Engineering, Cracow University of Technology Instytut Elektromechanicznych Przemian Energii, Wydział Inżynierii Elektrycznej i Komputerowej, Politechnika Krakowska Uniwersytet Śląski w Katowicach Correspondence to: José Gregorio Ferreira Correspondence to: Tadeusz J. Sobczyk Correspondence to: Adam Warzecha 16 12 2015 Elektrotechnika Zeszyt 1-E (8) 2015 2015 343 352 Copyright © 2015 2015 <p style="text-align: justify;"> This paper discusses the detection of internal faults in the stator and rotor windings of synchronous machines. Using current signature analysis, it is demonstrated how by using low cost equipment, it is possible to detect the fault by monitoring the currents. The process of detection is totally optimized, and the processing time is enough to identify the fault before the total machine damage. Using the spectrum of the healthy machine as a reference, the followed methodology allows the timely and reliable detection of faults.</p>