M. A. Shakirov

The article illustrates the failure of the traditional transformer theory on the example of an idealized transformer. The fundamentals of the new theory are set forward beginning from the principle of operation and motion of electromagnetic fi eld in the transformer window; new equivalent circuit and vector diagrams are examplifi ed. In the article’s conclusion it is presented the more correct decision on the sudden short circuit in real
**Keywords:** core, magnetic fl ux, short circuit, transformer, Poynting vector, magnetic fi eld.
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