Transformer and method for retrofitting a transformer
A transformer having a magnetic core which includes at least one leg with a winding arrangement and a yoke, wherein a compensation winding arrangement is provided to compensate for a unidirectional flux fraction that flows in the at least one leg, and the compensation winding arrangement is arranged on the yoke.
1. A transformer comprising:
a magnetic core including at least one limb having a winding arrangement and a yoke;
a compensation winding arrangement disposed on the yoke, said compensation winding arrangement compensating for a unidirectional flux component flowing in the at least one limb;
wherein the compensation winding arrangement includes at least one compensation winding which is formed from a plurality of conductor loops;
wherein each conductor loop of the plurality of conductor loops includes a plurality of wire sections extending in a direction of the yoke and oriented toward one another; and
wherein a first corresponding wire pair is interconnected and a second corresponding wire pair is extended to terminal contacts which are provided for a connection to an assigned current control device.
2. The transformer as claimed in claim 1 , wherein the compensation winding arrangement is disposed on a section of an upper yoke.
3. The transformer as claimed in claim 2 , wherein the compensation winding arrangement is formed from at least one open conductor loop which is wound at least partly around a section of the upper yoke.
4. The transformer as claimed in claim 3 , wherein the compensation winding is formed from a plurality of turns.
5. The transformer as claimed in claim 3 , wherein the compensation winding arrangement is formed from one of (i) a plurality of compensation windings and (ii) three compensation windings to which a respective separate current control device is assigned.