About the Evolution of the Iron Losses: From Sinusoidal to PWM Inverter Supply

The aim of this work is to present the evolution of the specific iron losses concept, in light of the introduction of the power converted supply, introduced in the 80s and currently a standard in the electrical machines supplies. This paper deals with the evolution for the iron losses. It is focused on the main differences introduced by the power converter on the magnetic and energetic quantities, with respect to the traditional sinusoidal sources and their effects on the soft magnetic material and the related iron losses.