A power converter

The invention discloses a power converter includes at least one resonance converter circuit; said resonance converter circuit includes main bridge (110) which is connected with input signal (Vin); resonance network (120), one end is connected with the main bridge (110), the other end is connected with the commutating circuit (130); said resonance network (120) includes resonance capacitance (Cm3), the first resonance transformer (T1) and the second resonance transformer (T2), the first resonance transformer (T1) and the second resonance transformer (T2) are in series and then in series with the resonance capacitance (Cm3), then one end is connected with the middle point of the main bridge (110), the other end is connected with the input signal, the middle point of said first resonance transformer (T1) and the second resonance transformer (T2) are connected with the negative end of the output signal (Vout). Two magnetic components of the resonance network in the invention possess function of transferring energy to the secondary border, at the same time the transformer does not need the secondary border winding with central wrapping, the design and production of transformer are more conveniently.