Patent ID: 8503208

Claim:
A converter system for single-phase and three-phase operation comprising: a converter; a first mains branch for said converter; said first mains branch connected at a point between a first set of two rectifying diodes in series; a first choke coil in said first mains branch, said first choke coil located before said connection point to between said first set of two rectifying diodes; a second mains branch for said converter; said second mains branch connected at a second point between a second set of two rectifying diodes in series; a second choke coil in said second mains branch, said second choke coil located before said connection second point to between said second set of two rectifying diodes; a third mains branch for said converter; a switch; a third choke coil connected to said switch and to a third connection point between a third set of two rectifying diodes; said switch having a first position that connects said third choke coil to said third mains branch for three-phase current conversion; and, said switch having for single-phase current conversion a second position that connects said third choke coil to a capacitor, said capacitor also connected to a low end of said converter system.