Electromagnetic modeling of inductors in EMT-type software by three circuit-based methods

Three distributed circuit-based approaches based on Hopkinson analogy, Buntenbach analogy and duality principle are proposed in this paper to provide a detailed electromagnetic model of an inductor. The proposed approaches can provide several important aspects of finite element method (FEM), such as detailed geometrical representation and incorporation of magnetic saturation. In comparison to FEM, which has numerous obstacles in studying a magnetic device in a large network, the proposed approaches can be implemented in electromagnetic transient (EMT)-type software and thus can simulate the magnetic devices in a large network. The three circuit-based methods are first compared to each other, and then a 2-D finite-element method is used to validate them.