Study of Nonlinear Characteristic Curve for the Core of Transformer with Magnetic Coupling
Yadong Fan · Gao dianya jishu · 2005
Nonlinear characteristics for the core of transformer is very important in computing exciting current or etc.a few of articles utilize improperly the nonlinear characteristic.For example,φ-i curve is regarded to be conformable to B-H curve regardless whether magnetic coupling exists in the core.This paper discusses the relationship of the two kinds of curves for different structural transformer.Conclusions are drawn that the B-H curve is similar to φ-i curve for single-phase transformer,the φ-i curve for symmetrical three-phase transformer is multiple B-H curve.The relationship of two kinds of curves for asymmetric three-phase transformer is deduced in this paper.