Equivalent circuit of magnetic coupling circuit, conversion method, and characteristic quantity extraction method

By introducing an equivalent circuit model with four impedance elements into a single-phase magnetic coupling circuit, and especially by making the circuit constants of the third and fourth impedances equal, the problem of information degradation when the magnetic coupling circuit is converted into a graph structure is solved, and correct current conservation and graph processing are achieved.

CN122374751APending Publication Date: 2026-07-10MITSUBISHI ELECTRIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MITSUBISHI ELECTRIC CORP
Filing Date
2023-12-11
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the prior art, single-phase magnetic coupling circuits cannot effectively reflect magnetic coupling information when converted into graph structures, resulting in information degradation. Furthermore, Kirchhoff's law of current conservation does not hold, making correct graph processing impossible.

Method used

An equivalent circuit model containing four impedance elements is used, where the circuit constants of the third and fourth impedances are equal. This model can convert the magnetically coupled circuit into a graphical structure and perform correct current conservation using Kirchhoff's laws.

Benefits of technology

It realizes the correct handling of single-phase magnetically coupled circuits in graph networks or graph neural networks, avoids short circuits between the primary and secondary sides, and enables correct handling based on circuit theory.

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Abstract

The equivalent circuit of the magnetic coupling circuit is the equivalent circuit of a single-phase magnetic coupling circuit obtained by mutual inductance between the inductor on the primary side and the inductor on the secondary side. It is characterized by comprising: a first impedance disposed between the + terminal and the - terminal on the primary side; a second impedance disposed between the + terminal and the - terminal on the secondary side; a third impedance disposed between the + terminal on the primary side and the + terminal on the secondary side; and a fourth impedance disposed between the - terminal on the primary side and the - terminal on the secondary side, wherein the circuit constants of the third impedance and the fourth impedance are equal.
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