A flux converter for converting an input-side alternating current into an output-side DC current, wherein a power factor correction is provided and the flux converter comprises a transformer having at least two serially arranged primary windings and a secondary winding wound in same direction. In addition, a first switch is used to switch a storage capacitor in series with a first primary winding to the alternating current in a clocked manner via rectification elements and a second primary winding can be switched to the storage capacitor in a clocked manner by a second switch.