| 摘要 |
The invention relates to a circuit arrangement for reducing a magnetic unidirectional flux component in the core (13) of a transformer, comprising: - a measuring device (12) which provides a sensor signal (10) corresponding to the magnetic unidirectional flux component, - a compensation coil (1) which is magnetically coupled to the core (13) of the transformer, and - a semiconductor switching device (2) which is electrically arranged in a current path (13) in series with the compensation coil (1) in order to feed a current (IGL) into the compensation coil (1), the effect of the current being directed opposite the unidirectional flux component, wherein the semiconductor switching device (2) can be controlled by means of a control signal (8) provided by a controller (9). The invention is characterized by an inductive voltage divider (11), having the following: a first impedance component (3) which is arranged in the current circuit (13) in series with the compensation coil (1) and the semiconductor switching device (2), said first impedance component (3) being connected in parallel with a parallel resonant circuit (5), and a second impedance component (3'), which is arranged in parallel with the semiconductor switching device (2). |
