Abstract
Differential transformer forms a open magnetic circuit with cylindrical rod, the magnetic flux along the rod becomes non-uniform distribution, because demagnetizing force exists. In analyzing such leakage magnetic path, sometimes method which observes the flux distribution along the rod gives a better physical interpretation of the phenomenon than observes permeance of the air magnetic path.
In this paper, from the above point of view, the circuit parameters, which are inductances and coefficients of coupling, are derived from the average flux along real winding axis of the transformer. Using this method with the aid of these circuit parameters, it is possible to odtain the performance theory of the transformer. The analytical method described in this paper is able to explain the influences of winding constructions, rod materials and dimensions, because the all circuit parameters are shown by the flux.
