| 摘要 |
<p>The invention relates to a current measuring device (1) comprising: - a compensation current converter (2) having at least one compensation winding - a voltage generation device (Rl) which is designed to generate an electrical first voltage (Ul) corresponding at least approximately to the level of a compensation current (Ik) flowing through the at least one compensation winding (L2), - a compensation current reduction device (7) which is designed to compare the first voltage (Ul) with a reference voltage (Uref) and, if the first voltage (Ul) exceeds the reference voltage (Uref), to act on a power unit (6) in such a manner that the level of the compensation current (Ik) is reduced. The invention also relates to methods for operating a current measuring device (1). The invention provides a current measuring device (1) having a compensation current converter (2) and a method for operating a current measuring device having a compensation current converter (2), which enable reliable operation, in particular of a power semiconductor module (9).</p> |
