equivalent models may be defined depending on the conduction state of the output diodes in each model one of the output inductors is in resonance and in series with the load while the other is in parallel with the load the model for the transformer includes a primary leakage inductance lleak 1 a magnetizing inductance lmag and a secondary leakage inductance lleak 2 the magnetizing inductance of the transformer is large in comparison with the others and may thus be neglected in that way the leakage inductance of the secondary winding may be in series with the primary leakage inductance and they can be considered as an only component lleak as stated before this inductor may be not a part of the resonance tank but may facilitate together with the capacitors cp 1 and cp 2 the zvs behavior of the switches s 1 and s 2 df 1 and df 2 are freewheeling diodes which may be part of the switches s 1 s 2 in case of mosfets or not cp 1 and cp 2 may be parasitic capacitances of the switches as well as external capacitors to sum up fig4 represents one of the two equivalent configurations with lleak 1 lleak 2 and lmag while fig5 and 6 show both configurations of the equivalent circuits of the converter without lmag by referring to the timings of the half bridge including the dead times with the discharge phases of cp 1 and cp 2 and the freewheeling phases and the direction of the current flowing in the inductors lr 1 lr 2 of the current doubler cyclical operation of the converter 10 can be partitioned into ten different phases or intervals bound by time instants t 0 t 9 this partition is presented in the following.