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<p>To address the significant increase in transformer volume, weight, and losses with decreasing frequency in flexible low-frequency AC transmission technology, this paper systematically investigates the correlation between microstructure, texture, and magnetic properties under complex operating conditions, using high-saturation magnetic induction oriented low-silicon steel as the research subject. By comparing the magnetic performance of Oriented Low-Silicon Steel (hereafter referred to as OLSS), 20QH075 grain-oriented silicon steel (Hi-B-1), 30QH105 grain-oriented silicon steel (Hi-B-2), FeCo alloy, and 35W270 non-oriented silicon steel under various conditions including sinusoidal excitation, harmonic excitation, and DC bias, and characterizing the microstructure and texture using Optical Microscopy (OM) and Electron Backscatter Diffraction (EBSD), the regulatory mechanisms of grain size and texture type on material magnetic behavior are analyzed. Experimental results show that OLSS possesses an ultra-high saturation magnetic flux density (2.263&#xa0;T) while maintaining relatively low losses under complex excitations such as low frequency, harmonics, and DC bias. OLSS shows great potential for application in low-frequency transformers, providing a material foundation and theoretical basis for the lightweight and high-efficiency design of low-frequency transmission equipment.</p>

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Study on the Coupling Mechanism of Microstructure and Texture on Magnetic Properties of Oriented Low-Silicon Steel

  • 期刊论文

  • 发表日期：

    2026年7月26日

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  • Qiming Wang,
  • Zhichao Li,
  • Ling Cheng,
  • Yu Han

摘要

To address the significant increase in transformer volume, weight, and losses with decreasing frequency in flexible low-frequency AC transmission technology, this paper systematically investigates the correlation between microstructure, texture, and magnetic properties under complex operating conditions, using high-saturation magnetic induction oriented low-silicon steel as the research subject. By comparing the magnetic performance of Oriented Low-Silicon Steel (hereafter referred to as OLSS), 20QH075 grain-oriented silicon steel (Hi-B-1), 30QH105 grain-oriented silicon steel (Hi-B-2), FeCo alloy, and 35W270 non-oriented silicon steel under various conditions including sinusoidal excitation, harmonic excitation, and DC bias, and characterizing the microstructure and texture using Optical Microscopy (OM) and Electron Backscatter Diffraction (EBSD), the regulatory mechanisms of grain size and texture type on material magnetic behavior are analyzed. Experimental results show that OLSS possesses an ultra-high saturation magnetic flux density (2.263 T) while maintaining relatively low losses under complex excitations such as low frequency, harmonics, and DC bias. OLSS shows great potential for application in low-frequency transformers, providing a material foundation and theoretical basis for the lightweight and high-efficiency design of low-frequency transmission equipment.