The traditional and new theories on transformers: comparison of concepts
Objective: To disclose contradictions of the traditional theory and to study the new theory on transformers which is believed to be better-formed in terms of dynamic ability in emergency situations. Methods: Critical analysis of the original concepts and operating principle of the double-wound transformers stated in the traditional theory was conducted. Results: The transition to the new theory on transformers is recommended. The concepts of building up Poynting vector in the bulk of primary winding as well as its advance through the gap between windings and its subsequent decrease as it penetrates into the bulk of secondary winding due to energy output given as a load are basic to the new theory. Practical importance: Validity of the new concept is confirmed by numerical computation of fields, which resulted in the discovery of new peculiarities of their distribution and new properties of transformers.