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Equivalent Circuit and Vector Diagram of an Autotransformer with Mapping of Magnetic Fluxes

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Abstract

A universal equivalent circuit of an autotransformer with explicit mapping of its main characteristic—transporting energy by two parallel paths (electrically and electromagnetically)—is presented. At the same time, a diagram displays the magnetic fluxes in the window sections and in separate sections of the magnetic circuit, as well as when the steel is saturated between it and the tank. A similar completeness of representation of the power and magnetic fluxes is provided by the vector diagram of autotransformer operating mode. With its help, a high degree of clarity was achieved when explaining overexcitation of individual parts of a magnetic circuit in a short-circuited autotransformer and when deriving formulas for determining super- and antisupercurrents in comparison with idle fluxes in this mode. The presented equivalent circuit is suitable for step-up and step-down autotransformers and is applicable to the study the steady-state and transient processes.

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REFERENCES

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Authors and Affiliations

  1. Peter the Great St. Petersburg Polytechnical University, St. Petersburg, Russia

    M. A. Shakirov

Authors
  1. M. A. Shakirov
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Correspondence to M. A. Shakirov.

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Translated by G. Dedkov

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Shakirov, M.A. Equivalent Circuit and Vector Diagram of an Autotransformer with Mapping of Magnetic Fluxes. Russ. Electr. Engin. 91, 225–234 (2020). https://doi.org/10.3103/S1068371220030177

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  • DOI: https://doi.org/10.3103/S1068371220030177

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