Eddy currents in a motor are related to the rate of change of the magnetic field in the iron. They look like a damping term if you are doing any modelling, NM/rad/sec is an example. Motor designers typically laminate the magnetic structure to minimize the flow of eddy currents. Thinner laminations provide a higher resistance to eddy current flow. Any eddy currents present will produce heating in the motor and result in a drag torque that is proportional to speed.