TY - JOUR N2 - The new topology of three-winding welding transformer is proposed. Each secondary winding is connected in parallel through the separate bridge rectifier to the welding arc. The main feature of the proposed device is parallel working of two secondary windings with different rated voltage. The advantage is nonlinear transformation ratio of current that provides unprecedented power efficiency. The self- and mutual leakage inductances, which are important in power conversion, are calculated by 2D FEA model. The operational current of the device is modelled numerically via P-Spice simulator. The proposed topology is up to 30% more power effective than conventional welding transformer provided that the leakage inductances of primary and secondary windings are correctly fitted. This transformer is used for manual arc welding. L1 - http://journals.pan.pl/Content/85078/PDF/07_paper.pdf L2 - http://journals.pan.pl/Content/85078 PY - 2015 IS - No 2 June EP - 257 DO - 10.1515/aee-2015-0021 KW - Arc welding KW - double-bridge rectifier KW - leakage inductance KW - three-winding transformer KW - transformer equivalent circuit A1 - Sakhno, Lyudmila A1 - Sakhno, Olga A1 - Dubitsky, Simon PB - Polish Academy of Sciences VL - vol. 64 DA - 2015[2015.01.01 AD - 2015.12.31 AD] T1 - Field-circuit modelling of an advanced welding transformer with two parallel rectifiers SP - 249 UR - http://journals.pan.pl/dlibra/publication/edition/85078 T2 - Archives of Electrical Engineering ER -