Patent ID: 9183980
Filing Date: 2015-11-10
Classification: H01F,H03H

Abstract:
1. An arrangement for reducing a DC field component in the core of a transformer, comprising: a compensation winding which is magnetically coupled to the core of the transformer, a DC generator which is arranged in series with the compensation winding and with a reactance dipole, wherein the reactance dipole is formed from a parallel circuit of an inductance and a capacitor, in order to feed into the compensation winding a compensating current, the effect of which is in the opposite direction to the DC field component in the core, wherein the inductance is formed from a first winding which is magnetically coupled to a second winding, wherein the ratio formed from the number of turns N wherein the first winding is connected by its one end to the DC generator and by its other end to the compensation winding, wherein the second winding is connected in parallel with the capacitor, and wherein the magnetic coupling of the first winding and of the second winding is established via a soft magnetic core which has an air gap.