Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (3): 68 doi: 10.1007/s41365-016-0060-3


Equivalent circuit model for the insulated core transformer

Bo Yang 1  Lei Cao Jun Yang 2  Sheng-Chi Yan 1  Yi-Bin Tao 1   

  1. 1 China Electric Power Research Institute, Nanjing 210003, China
    2 State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Contact: Lei Cao
  • Supported by:

    This work was supported by National Natural Science Foundation of China (No. 11305068), and the ‘‘2011 project’’ organized by Hubei Collaboration Innovation Center of Non-power Nuclear Technology.

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Bo Yang, Lei Cao, Jun Yang, Sheng-Chi Yan, Yi-Bin Tao. Equivalent circuit model for the insulated core transformer.Nuclear Science and Techniques, 2016, 27(3): 68     doi: 10.1007/s41365-016-0060-3


The design of the insulated core transformer (ICT) needs to consider the flux leakage effects. An equivalent linear circuit model is proposed based on the principle of duality. It is composed by two types of leakage inductances: conventional leakage between windings and special leakage introduced mainly by the insulation gaps. The values of leakage inductances depend on the dimensions of the core, gaps, or windings and the property of magnetic materials. The circuit allows for quantitatively evaluating influences of ICT internal parameters on its output properties. The winding self- and mutual inductance matrix is mathematically converted to derive the inductance formula. As an example, the leakage parameters of a six-stage two-dimensional (2D) ICT are calculated and analyzed.

Key words: High-voltage power supply, Insulated core transformer, Leakage inductance, Equivalent circuit