Measurements and Prediction of Iron Losses in Laminated Magnetic Cores Supplied By Ultra-High Switching Frequency PWM

The paper deals with measurements of iron losses in toroidally-wound laminated magnetic cores supplied by means of wide-bandgap-semiconductor-based power electronic converters. The study is aimed at investigating the impact of selected PWM parameters on the iron losses, through an extensive experimental measurement campaign; the magnetic core under test is supplied by pulse-width-modulated voltage waveforms with switching frequencies greater than 100 kHz and different deadtimes. This investigation is used for a critical review of an engineering method that was proposed in prior literature to predict iron losses in the presence of a distorted voltage supply.