Principle and Application of Measuring Power Transformer Wire-Wound DC Resistance Based on Gyrator
Liu Yuan · Journal of University of South China · 2007
The circuit model of transformer wire-wound is large inductance in series with small resistance.The circuit for testing its resistance is a first-order circuit,whose time constant is very large.A lot of effective methods were given for the sake of decreasing the time constant.This paper discusses the method of a model of large inductance in series with small resistance transformed into a model of small capacitance in parallel with large resistance by gyrator.It worked in bridge testing circuit,and the time constant decreased greatly.This is a new method for fast measuring of transformer wire-wound DC resistance. Hence a concrete and practical circuit was offered in this paper.