A. Baccigalupi et al., ON A CIRCUIT-THEORY APPROACH TO EVALUATE THE STRAY CAPACITANCES OF 2 COUPLED INDUCTORS, IEEE transactions on instrumentation and measurement, 43(5), 1994, pp. 774-776
This paper provides a method for evaluating three lumped equivalent ca
pacitances which take into account the physical effects of stray capac
itances in two coupled inductors. Capacitance evaluation is performed
in two steps: (i) initially, the resistance and leakage inductance of
each winding, together with the magnetic core equivalent impedance, ar
e evaluated by means of discrete parameter estimation; (ii) successive
ly, the three equivalent capacitances are evaluated by resolving a lin
ear set of three algebraical equations after the natural oscillation f
requencies of the two coupled inductors in experimental tests are dete
rmined. The paper provides both the definitions and the mathematical t
heory on which the method is based. The actual response of two coupled
inductors was compared with the response of the identified model; tes
ts showed a good correlation between them.