New Design and Magnetic Field Analysis of Transformer Shape with V-Connection for Core Loss Reduction in Railway System

Abstract

This paper presents a new design of transformer shape core used in railway system for loss reduction analyzed via the magnetic vector potential in the form of partial differential equation related to magnetic field. Finite element method is used in order to simulate a three-dimensional system. This paper focuses on the core loss reduction which is calculated from magnetic vector potential and magnetic field behavior on core transformer with V-connection, while the transformer has supplied voltage from three-phase system. The unbalanced input voltage is divided into three case studies in this paper: C-A couple phase, A-B couple phase and B-C couple phase from three-phase system. In addition, a design of transformer shape core has occurred on the corner that is the intersection between vertical core and horizontal core with 5 mm radius curves. The simulation results compare core loss of transformer between the original shape of transformer core and the new design of transformer core even though the supplied voltage is unbalanced. However, the results have shown that the new design of transformer core can decrease the core loss and it can lead to develop the shape of transformer core in order to reduce the core loss in term of manufacturing.