VP18-03 Magnetic Anisotropy Investigation of Grain-Oriented Electrical Steels for a Wide Range of Temperatures
Creators: Zhiye Li
Yuxiao Li
Yiwei Qin
Xiaodong Hu
Xiaoyu Liu
Ruilin Pei
and Lubin Zeng
Publisher: name: IEEE
Year: 2025

Grain oriented electrical steel (GOES) has the advantages of high permeability, low iron loss and high saturation flux density in the rolling direction (RD), so it is popular with electrical equipment such as transformers and electric motors. Whether transformers with 1D magnetic circuits or electric motors with 2D magnetic circuits, the magnetic field is not ideally in the direction of RD when the GOES is really operating. Therefore a comprehensive insight into the magnetic anisotropy of GOES can help researchers to better utilize GOES. In addition, energy losses in electrical equipment and ambient temperatures can cause GOES to operate over a wide temperature range. In order to design high quality electrical devices, it is necessary to investigate the effect of temperature on the magnetic anisotropy of GOES. In this paper, the magnetic properties of GOES such as magnetic flux density, specific core loss, permeability, etc. are investigated at different temperatures and magnetization angles. The results show that the temperature has a significant effect on the magnetic anisotropy of GOES. Similar to the properties of non-grain oriented electrical steel, an increase in temperature causes a decrease in permeability and iron loss, and their pattern of change is minor in relation to the magnetic anisotropy. Interestingly, however, the anisotropy of the magnetic flux density responds in different ways to an increase in temperature. When the magnetization angle is below 40°, the increasing temperature decreases the magnetic flux density, in contrast to the increasing flux density when the magnetization angle is above 40°.The effect of temperature and anisotropy on the magnetic properties of GOES is well demonstrated in this paper, which has important implications for the design and performance prediction of electrical equipment.References: [1] W. Zhang, Q. Yang, Y. Li, "Temperature dependence of powder cores magnetic properties for medium-frequency applications" in IEEE Transactions on Magnetics, Vol.58, No.2, p.1-5(2022). [2] M. L. Ababsa, O. Ninet, G. Velu, "High-Temperature Magnetic Characterization Using an Adapted Epstein Frame" in IEEE Transactions on Magnetics, Vol.54, No.6, p.1-6(2018). [3] X. Pei, A. C. Smith, L. Vandenbossche, "Magnetic Characterization of Soft Magnetic Cores at Cryogenic Temperatures," in IEEE Transactions on Applied Superconductivity, vol. 29, No. 5, p. 1-6(2019). [4] K. Kume, R. Inoue, H. Ueda, "Study on the Magnetic Properties of Metal Substrates at Low Temperature by Fabricated Compact SST," in IEEE Transactions on Applied Superconductivity, Vol. 32, No. 6, p. 1-4(2022).
Grain oriented electrical steel (GOES) has the advantages of high permeability, low iron loss and high saturation flux density in the rolling direction (RD), so it is popular with electrical equipment such as transformers and electric motors. Whether transformers with 1D magnetic circuits or electric motors with 2D magnetic circuits, the magnetic field is not ideally in the direction of RD when the GOES is really operating. Therefore a comprehensive insight into the magnetic anisotropy of GOES can help researchers to better utilize GOES. In addition, energy losses in electrical equipment and ambient temperatures can cause GOES to operate over a wide temperature range. In order to design high quality electrical devices, it is necessary to investigate the effect of temperature on the magnetic anisotropy of GOES. In this paper, the magnetic properties of GOES such as magnetic flux density, specific core loss, permeability, etc. are investigated at different temperatures and magnetization angles. The results show that the temperature has a significant effect on the magnetic anisotropy of GOES. Similar to the properties of non-grain oriented electrical steel, an increase in temperature causes a decrease in permeability and iron loss, and their pattern of change is minor in relation to the magnetic anisotropy. Interestingly, however, the anisotropy of the magnetic flux density responds in different ways to an increase in temperature. When the magnetization angle is below 40°, the increasing temperature decreases the magnetic flux density, in contrast to the increasing flux density when the magnetization angle is above 40°.The effect of temperature and anisotropy on the magnetic properties of GOES is well demonstrated in this paper, which has important implications for the design and performance prediction of electrical equipment.References: [1] W. Zhang, Q. Yang, Y. Li, "Temperature dependence of powder cores magnetic properties for medium-frequency applications" in IEEE Transactions on Magnetics, Vol.58, No.2, p.1-5(2022). [2] M. L. Ababsa, O. Ninet, G. Velu, "High-Temperature Magnetic Characterization Using an Adapted Epstein Frame" in IEEE Transactions on Magnetics, Vol.54, No.6, p.1-6(2018). [3] X. Pei, A. C. Smith, L. Vandenbossche, "Magnetic Characterization of Soft Magnetic Cores at Cryogenic Temperatures," in IEEE Transactions on Applied Superconductivity, vol. 29, No. 5, p. 1-6(2019). [4] K. Kume, R. Inoue, H. Ueda, "Study on the Magnetic Properties of Metal Substrates at Low Temperature by Fabricated Compact SST," in IEEE Transactions on Applied Superconductivity, Vol. 32, No. 6, p. 1-4(2022).