“…This method is based on the processing of signals obtained from the sensors of various physical quantities of the machine, such as stator lines currents, instantaneous power, rotational speed, axial flux and vibrational effects generated by machine faults (Karmakar et al, 2016;Cardoso et al, 1999;Lamim Filho et al, 2016). The obtained signals are analyzed using different diagnostic techniques, such as fast Fourier transform (FFT) method (Benbouzid and Kliman, 2003), shorttime Fourier transform (Benbouzid and Kliman, 2003), Hilbert Transform (HT) (Saddam et al, 2017;Jaksch, 2003;Puche-Panadero et al, 2009), Hilbert-Huang transform (Elbouchikhi et al, 2017) and Park's vector approach (PVA) (Perez-Cruz et al, 2017;Cardoso et al, 1999;Benbouzid and Kliman, 2003;Xu et al, 2013;Jaksch, 2003). MCSA has the advantage of being an independent internal flow system and does not need the machine to be turned off; therefore, the information carried by the signals will not be affected by the possible modeling error (Puche-Panadero et al, 2009).…”