A Novel Plug-In Core Design for Three-Phase Transformers Une nouvelle conception de noyau enfichable pour les transformateurs triphases

In this study, in order to reduce stacking time and production costs of transformer electrical sheets, a new Plug-In core model has been proposed. This Plug-In transformer was designed as a three-phase transformer made with M330-50A electrical steel with a rated power of 4.7 kVA and then produced as a prototype. Both the proposed transformer model and a reference EI-core transformer with same rated power and electrical ratings were analyzed using an ANSYS Maxwell 2-D simulation program and the results were compared. The distribution of magnetic flux densities, core losses, the local regions where core losses mostly occur, copper losses, and transient inrush currents have been simulated for both the transformers. Apart from simulation, load and no-load tests have been tested and the efficiency analysis of the transformers was determined. It has been determined that considerably less time and labor are required for stacking and assembly progress of the proposed core compared to the reference EI core transformer.