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Core Loss Calculation of Segmented Air Gap Core Inductor Based on Magnetic Circuit Method
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Aiyu GU1, Liquan FU1, Yue DONG2
Journal of Power Supply | 2026, 24(2) : 10 - 17
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Journal of Power Supply | 2026, 24(2): 10-17
• Passive Devices •
Core Loss Calculation of Segmented Air Gap Core Inductor Based on Magnetic Circuit Method
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Aiyu GU1, Liquan FU1, Yue DONG2
Affiliations
  • 1.School of Automation, Guangdong University of Technology, Guangzhou 510006, China
  • 2.Zhongwei Power Supply Company, State Grid Ningxia Electric Power Co., Ltd., Zhongwei 755000, China
Published: 2026-02-28 doi: 10.13234/j.issn.2095-2805.2026.2.10
Outline
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In the design of inductors for switching power supply and transformers, the calculation of magnetic circuit parameters is of significance. Given that it is difficult to accurately calculate the core reluctance and core loss of the center-column segmented air gap, an improved magnetic circuit model of the inductor core is proposed with an EC-type inductor core as an example, which is based on the exact domain solution and conformal transformation. Through theoretical analysis, the analytical expression for the equivalent magnetic reluctance of diffused magnetic flux near the center-column air gap in the magnetic core is derived, and a calculation model of magnetic reluctance for the uneven magnetic flux in the inner angle of the magnetic core is put forward as well. Finally, a 3D model was established in the eddy current field of ANSYS Maxwell simulation software, and physical experiments were also carried out. A comparison of theoretical results with simulation results and experimental data verified the accuracy of the theoretical analysis, providing theoretical guidance and reference for the optimization design and industrial production of various magnetic cores of inductors or transformers used in segmented air gaps in switching power supply.

Segmented air gap  /  inductor core  /  magnetic circuit model  /  diffused magneticflux  /  reluctance calculation
谷爱昱, 符立泉, 董越. 基于磁路法的分段气隙磁心电感器磁损计算. 电源学报, 2026 , 24 (2) : 10 -17 . DOI: 10.13234/j.issn.2095-2805.2026.2.10
Aiyu GU, Liquan FU, Yue DONG. Core Loss Calculation of Segmented Air Gap Core Inductor Based on Magnetic Circuit Method[J]. Journal of Power Supply, 2026 , 24 (2) : 10 -17 . DOI: 10.13234/j.issn.2095-2805.2026.2.10
Funding
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  • National Natural Science Foundation of China(62103109)
  • Guangzhou Science and Technology Planning Project(201802010045)
Appendix
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Year 2026 volume 24 Issue 2
36
9
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.2.10
  • Receive Date：2023-06-07
  • Online Date：2026-10-29
  • Published：2026-02-28
Article Data
Affiliations
History
  • Received：2023-06-07
  • Revised：2023-09-18
  • Accepted：2023-10-20
Funding
National Natural Science Foundation of China(62103109)
Guangzhou Science and Technology Planning Project(201802010045)
Affiliations
    1.School of Automation, Guangdong University of Technology, Guangzhou 510006, China
    2.Zhongwei Power Supply Company, State Grid Ningxia Electric Power Co., Ltd., Zhongwei 755000, China
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Citations
表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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