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

Abstract

The paper presents a methodology for determination of harmonic iron losses in laminated iron cores under both sinusoidal and sinusoidal pulse width modulated voltage excitations (SPWM) excitation for various frequencies. 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 the switching frequency does not considerably affect iron losses under SPWM supply and vary non-linearly with flux density with respect to the ones measured under sinusoidal excitation for the same fundamental frequency.

Experimental and Theoretical Analysis of Iron Losses of Electrical Steels Subjected to Distorted Supply Voltage Waveform Conditions

“…6, 7 show the sinusoidal voltage waveform and the resulting experimental and simulated magnetizing current respectively. The impact of the sinusoidal voltage waveform, on iron loss and the harmonic content of the magnetizing current, is less significant than that of the rest of the distorted voltage waveforms [13].…”

Experimental Study on the Iron Loss Curve at High Field Strength of Non-Oriented Electrical Steel Sheet

“…One of the magnetic measurement techniques, the H-coil method is useful in order to get precise magnetizing field reading. An iron loss and the measurement are reported by many researchers [4,5,6].…”