Resumen
The present invention focuses on the field of on-line monitoring (in connection) for the diagnosis of electrical machines by means of the frequency response technique, obtained from the analysis of transient signals using the wavelet transform, allowing to monitor the electrical machine without interrupting the power supply, although it is totally applicable to off-line monitoring (in disconnection). The invention consists of at least one controlled signal injection block, a filtering block in the time-frequency domain, and a processing block in the time-frequency domain, for the calculation of the characteristic impedance or frequency response of a electric machine. (Machine-translation by Google Translate, not legally binding)