Abstract: An innovative planar transformer structure, the transformer includes a primary circuit comprising a primary winding of N1 turns; a secondary circuit comprising a secondary winding of N2 turns; a printed circuit board of layers superposed on one another, forming an aperture defining a perimeter; vias disposed at the centre of the primary and secondary windings on the perimeter of the aperture, the N1 and N2 turns being each disposed on a layer, according to any alternation between the N1 and N2 turns, each of the N1 and N2 turns being wound, partially around vias in forming a circular arc per layer; the circular arc of a layer being distinctly oriented with respect to the circular arcs of the other layers.

Abstract: A power converter having a parallel resonant circuit, includes an inverter, a resonant circuit, a transformer comprising a primary circuit and a secondary circuit, control means for the inverter, the inverter being connected to the resonant circuit, which is intended to be connected to an output load via the transformer, the power converter wherein the inverter comprises a first half-bridge and a second half-bridge in parallel with the first half-bridge, a first inductor between the first half-bridge and the resonant circuit, a second inductor between the second half-bridge and the resonant circuit, and in that the first and second inductors have the same inductance and are coupled in the opposite direction to one another.

Abstract: A power converter having a parallel resonant circuit, includes an inverter, a resonant circuit, a transformer comprising a primary circuit and a secondary circuit, control means for the inverter, the inverter being connected to the resonant circuit, which is intended to be connected to an output load via the transformer, the power converter wherein the inverter comprises a first half-bridge and a second half-bridge in parallel with the first half-bridge, a first inductor between the first half-bridge and the resonant circuit, a second inductor between the second half-bridge and the resonant circuit, and in that the first and second inductors have the same inductance and are coupled in the opposite direction to one another.