Open Access
ARTICLE
Investigation of Core Loss Calculation Methods for Nanocrystalline Core in Medium Frequency Range
Yunxiang Guo1, Cheng Lu1,2, Feng Yu1, Liang Hua1, Xinsong Zhang1,*
1 College of Electrical Engineering, Nantong University, Nantong, 226019, China
2 Nantong Research Institute for Advanced Communication Technologies, Nantong, 226019, China
* Corresponding Author: Xinsong Zhang. Email:
Energy Engineering 2020, 117(6), 429-438. https://doi.org/10.32604/EE.2020.011673
Received 22 May 2020; Accepted 03 August 2020; Issue published 16 October 2020
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, the coefficients of OSE for the
core are fitted. Finally, core loss calculation results using the proposed correction
methods under different amplitudes and duty ratios are analyzed and compared with
the measured values. The results verify the correctness of the theoretical analysis,
that waveform-coefficient Steinmetz equation is the most suitable method for loss
calculation of nanocrystalline core in medium frequency range when the excitation
voltage is a rectangular wave with an adjustable duty ratio.
Keywords
Cite This Article
Guo, Y., Lu, C., Yu, F., Hua, L., Zhang, X. (2020). Investigation of Core Loss Calculation Methods for Nanocrystalline Core in Medium Frequency Range.
Energy Engineering, 117(6), 429–438. https://doi.org/10.32604/EE.2020.011673