Ferriresibabce Circuit Analysis Employing Chua Type Model

This paper studies nonlinear phenomena caused by ferromagnetic materials. To represent nonlinear properties of ferromagnetic materials used in the electrical transformer, we employ a Chua-type magnetization model composed of the nonlinear parameters: permeability μ, reversible permeability μr, and hysteresis parameter s independently measured from the past magnetization history. By the backward Euler method with automatic modification, the transient analysis of this initial value problem is carried out. As a result, it is clarified that ferroresonance phenomenon could be observe secondary circuit of transformer. Moreover, computed transient response is well corresponding to measured one. Keyword : Nonlinear, Ferromagnetic materials, Ferroresonance, Electric machine