Abstract
A magnetic properties measurement system with the frequency-domain feedback control method is developed in this paper. The system can generate non-sinusoidal waveforms consisting of harmonics with variable orders, contents, and phase angles. Core loss measurement of soft magnetic composite materials under both the sinusoidal and non-sinusoidal excitations is performed. In terms of the harmonic order, content, and phase angle, the effects of harmonic for core loss are analyzed. The frequency-domain Bertotti equations are used to predict the core loss and then compared with the experimental results. The applicability of this method for non-sinusoidal waveforms is also discussed in detail.
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