Condition monitoring of mechanical drive train coupled with electrical machines

A system for monitoring health of a mechanical drive train, the system comprising:

• a device module in communication to an electrical machine coupled to the mechanical drive train and said device module configured to measure characteristics of the electrical machine, the device comprising a memory, wherein the memory comprises instructions for:
• obtaining voltage and current signals from at least one phase of the electrical machine coupled with the mechanical drive train;
• representing the electrical machine having a non-sinusoidal flux distribution as a combination of a plurality of harmonic order sinusoidally distributed virtual electrical machines based on the obtained voltage and current signals;
• determining a torque profile or spectrum associated with one or more combination of the sinusoidally distributed virtual electrical machines;
• and
• detecting the presence of an anomaly in the mechanical drive train based on the torque profile or spectrum.