FILTER CAPACITOR DEGRADATION IDENTIFICATION USING MEASURED AND EXPECTED VOLTAGE

FILTER CAPACITOR DEGRADATION IDENTIFICATION USING MEASURED AND EXPECTED VOLTAGE

Methods and apparatus are presented for detecting degrading filter capacitors in motor drives or other power converters, in which an expected DC equivalent voltage and a measured DC equivalent voltage are computed according to sampled filter circuit currents and voltages, and compared to selectively...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PATEL YOGESH, SARTLER CHRISTIAN, PHILLIPS MARK G, WEI LIXIANG
Format: Patent
Sprache:eng
Schlagworte:
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:Methods and apparatus are presented for detecting degrading filter capacitors in motor drives or other power converters, in which an expected DC equivalent voltage and a measured DC equivalent voltage are computed according to sampled filter circuit currents and voltages, and compared to selectively identify filter capacitor degradation conditions in a power converter filter circuit.