Multiple-Fault Detection Methodology Based on Vibration and Current Analysis Applied to Bearings in Induction Motors and Gearboxes on the Kinematic Chain

Table 8

Principal frequency components to be analyzed in current spectra.

Frequency set in VFD (Hz)	Frequencies around the supply frequency (Hz)
	15	15.14	3.90	7.81	22.46	26.37	29.79	83.02
50	49.81	25.39	37.60	62.50	69.82	74.71	277.64