| 摘要 |
The invention relates to a current-measuring device for the galvanically decoupled measurement of high currents through an electrical conductor. For this purpose, a plurality of magnetic-field sensors are arranged around the electrical conductor. Furthermore, the current-measuring device comprises a compensation coil, which surrounds the magnetic-field sensors and in which a compensation current can be set. By control of the compensation current through the compensation coil, the magnetic field caused by the electric current through the electrical conductor to be measured and the magnetic field caused by the electrical compensation current through the compensation coil can largely compensate each other. The enables very precise and disturbance-free measurement of high electric currents over a large dynamic range. |
