Laminated iron core losses variation with frequency and under SPWM excitation

Abstract

The paper presents a methodology for determination of harmonic iron losses in laminated iron cores under sinusoidal excitation for various frequencies and sinusoidal pulse width modulated voltage excitations. The method is based on measurements performed by using a convenient Epstein device supplied by a sinusoidal and a SPWM source, which are stored and processed in a PC by using an appropriate data acquisition card. It is shown that calculation of iron losses due harmonics cannot be performed by applying summation of harmonic components.

Comparison of Iron Losses in Multiple Grain Size Iron Laminations under Sinusoidal and SPWM Excitation

“…Also the case of non-oriented iron laminations has been examined under SPWM excitation for a wide range of switching frequencies. In particular, additional recent work with respect to the results presented in [12] concerning comparison of iron losses in different grain size non oriented laminations under PWM supply is included hereafter.…”