| 摘要 |
An error in measuring phase currents of the system is detected by evaluating absolute values for specific operation times. The absolute values depend on the length of a rotating pointer which rotates at a frequency that is equal to a frequency of the phase currents, wherein the length of the rotating pointer depends on the phase currents. The absolute values are used to detect an error in measuring at least one of the phase currents. A controlling device repeatedly generates identical or similar sequences of control signals for controlling the converter (steps S10 and S11). Based on the information about these sequences, the corresponding absolute value is selected or appropriate measurement information is saved (steps S12, S13 and S14) for later evaluation. |
