Patent ID: 7173832

Claim:
A multifunction power convertor, comprising: a rectifier circuit; a filter circuit connecting with the rectifier circuit; an inverter circuit connecting with the filter circuit; differential mode voltage suppression reactors (LS 1 , LS 2 , LS 3 ) which connect in series with output lines (U, V, W) of the inverter circuit respectively; a filter capacitor group, said filter capacitor group comprising a plurality of capacitors (C 3 , C 4 , C 5 ), one ends of which connect in series with the output lines (U, V, W); wherein other ends of said plurality of capacitors (C 3 , C 4 , C 5 ) connect in parallel and form a center point (N); wherein a closed magnetic ring is provided on the output lines (U, V, W) of the inverter circuit between the differential mode voltage suppression reactors and the filter capacitor group; and wherein the closed magnetic ring is arranged in such way that the output lines U, V, W) wind in parallel on the closed magnetic ring.