In order to simplify the calculations in the resonant circuit
design is preferable to work with the circuit referred to the
primary side. Furthermore, the capacitance between primary
and secondary windings, the magnetic losses and the winding
resistances do not have significant influence in the resonance
phenomenon. This way, the equivalent circuit can be reduced
to the circuit presented in Fig. 3, were [5]:
9 Ld is the equivalent leakage inductance, obtained
by the series association of the primary side and
secondary side leakage inductance referred to
primary side.
9 Ct is the equivalent windings capacitance
obtained by the parallel association of the
primary side and secondary side winding
capacitor referred to primary side.
9 L
m is the magnetizing inductance