DIAGNOSTIC DEVICE OF PERMANENT MAGNET SYNCHRONOUS MOTOR, AND INVERTER COMPRISING SAID DIAGNOSTIC DEVICE

A permanent magnet synchronous motor diagnostic device (7) includes: a negative-sequence current calculator (4) that calculates a negative-sequence current, based on magnitudes of a plurality of phase currents flowing through a permanent magnet synchronous motor (2) that rotates a load; and a deteri...

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Bibliographische Detailangaben
Hauptverfasser:	YUASA, Kenta, KURIYAMA, Toshiyuki, SAKANOBE, Kazunori, KAMIKURA, Mamoru
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	A permanent magnet synchronous motor diagnostic device (7) includes: a negative-sequence current calculator (4) that calculates a negative-sequence current, based on magnitudes of a plurality of phase currents flowing through a permanent magnet synchronous motor (2) that rotates a load; and a deterioration diagnoser (5) that diagnoses deterioration of a plain bearing (9) supporting the permanent magnet synchronous motor (2), based on the negative-sequence current.