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 transfo...
