ABSTRACT
Harmonics have deleterious effects on electrical equipment. Harmonics will produce elastic deformation, e.g., shaft deflection, parasitic torques, vibrations noise, additional heating, and lower the efficiency of rotating machines. The effect of the harmonics on motor losses should consider the subdivision of losses into windage and friction, stator copper loss, core loss, rotor copper loss, and stray loss in the core and conductors and the effect of harmonics on each of these components. In a synchronous machine, the frequency induced in the rotor is the net rotational difference between the fundamental frequency and the harmonic frequency. The effect of the harmonics on motor losses should consider the subdivision of losses into windage and friction, stator copper loss, core loss, rotor copper loss and stray loss in the core and conductors and the effect of harmonics on each of these components. A transformer supplying nonlinear load may have to be derated. Harmonics effect transformer losses and eddy current loss density.
