| 摘要 |
<p>Procedure and apparatus for the measurement of the currents in a frequency converter, whereby the phase currents (IR,IS,IT) of the frequency converter are measured by storing signals (Um) corresponding to the current (IDC) of the d.c. circuit of the converter in memory and by producing a current value (iR,iS,iT) corresponding to the phase current from the previous and the momentary signals.</p> |
