Magnetic flux distribution in the amorphous modular transformers

3D magnetic fluxes in one-phase and three-phase transformers with amorphous modular cores have been studied. Scalar potentials were implemented for the 3D Finite Element field calculation. Due to the inability to simulate each thin amorphous layer, we introduced supplementary permeabilities along the main directions of magnetization. The calculated fluxes in the cores were tested on the prototypes.

Research highlights
► New innovative construction of the amorphous modular transformers has been studied with FEM.
► Authors compared the amorphous, modular 3-phase transformer and transformer with the traditional core under the same rated power (S=10 kV A). Core losses in the amorphous one are about 3 times lower (PFe=30 W) than for the traditional one (PFe=100 W).
► In our 3D calculation model the supplementary permeabilities are along the main directions of magnetization.
► The results obtained from 3D field analysis confirmed the measured ones. Good agreement was obtained between calculated and measured results.