Fault detection for laminated core

A system for evaluating the condition of a laminated core of an electric machine, the laminated core including a plurality of radially extending teeth, the system comprising:

• a first yoke having a first pair of arms extending from a transverse portion, the first pair of arms spaced from each other a distance substantially equal to a spacing between a first pair of teeth of the laminated core, and the first yoke being wound with a first winding;
• a second yoke having a second pair of arms extending from a transverse portion, the second pair of arms spaced from each other a distance substantially equal to a spacing between a second pair of teeth different than the first pair of teeth, and the second yoke being wound with a second winding;
• a power supply providing power to an electrical circuit defined by one of the first and second windings to produce a magnetic flux in the yoke corresponding to the one of the first and second windings and defining an excitation yoke;
• and
• a monitoring module providing a measurement of a characteristic of an electrical circuit defined by the other one of the first and second windings to identify a fault corresponding to an eddy current between individual laminations in the laminated core.