Yunxiang Guo1, Cheng Lu1,2, Feng Yu1, Liang Hua1, Xinsong Zhang1,*
Energy Engineering, Vol.117, No.6, pp. 429-438, 2020, DOI:10.32604/EE.2020.011673
Abstract Nanocrystalline core is often adopted in high-power medium-frequency
transformer, whose excitation voltage is usually a rectangular wave with an adjustable duty ratio. In this paper, several kinds of methods are proposed for core loss
calculation under non-sinusoidal voltage excitation by modifying the original Steinmetz equation (OSE). Firstly, these correction methods are compared in theory, and
their analytical equations under rectangular voltage with an adjustable duty ratio are
deduced. Then, a hysteresis loop measurement system is established to measure
the core loss density of a nanocrystalline core. Based on the measured results of the
core loss density under sinusoidal voltage excitation,… More >
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