Relict flux measuring device
A residual magnetic flux determining apparatus uses a voltage transformer voltage determining means for determining a voltage transformer voltage; a voltage delaying means for delaying a determination signal; a voltage DC component calculating means for calculating a voltage DC component from a calc...
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| Hauptverfasser: | , , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | A residual magnetic flux determining apparatus uses a voltage transformer voltage determining means for determining a voltage transformer voltage; a voltage delaying means for delaying a determination signal; a voltage DC component calculating means for calculating a voltage DC component from a calculation control signal and a voltage transformer voltage signal during a past particular time; a voltage integrating means for voltage integrating a signal, which is obtained by removing the voltage DC component from the present voltage transformer voltage signal, to calculate a voltage integrated signal; a magnetic flux DC component calculating means for calculating a magnetic flux DC component from a calculation control signal and a voltage integrated signal during a past particular time; a magnetic flux calculating means for providing a magnetic flux signal obtained by removing the magnetic flux DC component from the present voltage integrated signal; and a control means for determining a residual magnetic flux |
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