Coupled inductance and reluctance models of magnetic components

Different models for linear transformers are discussed relative to their use in circuit simulation. These models include: the reluctance model, the permeance model, the inductance matrix model, the T-model and the reduced T-model. Equations relating the parameter values of the models are derived for the two- and three-winding transformers. A method for direct measurement of the inductance matrix model parameters is described. Guidance is provided for deriving model parameters and using the models in circuit simulators. A model of an ideal transformer using controlled current and voltage sources useful for the T-model is derived. Several examples are discussed