METHODS OF FAULT DETECTION IN AN ELECTRICAL MACHINE, ELECTRICAL MACHINES AND WIND TURBINES

Methods of fault detection (200) in an electrical machine (1) having a rotor (2) and a stator (3) are disclosed. One of the rotor (2) and stator (3) has at least two coils (a1, a2, a3, a4) connected in series, the method comprises measuring a voltage over a single coil of the two coils connected in...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	URRESTY, JULIO CÉSAR
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 ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	Methods of fault detection (200) in an electrical machine (1) having a rotor (2) and a stator (3) are disclosed. One of the rotor (2) and stator (3) has at least two coils (a1, a2, a3, a4) connected in series, the method comprises measuring a voltage over a single coil of the two coils connected in series and determining a fault condition based at least on the measured voltage (ea1, ea2, ea3, ea4) over time. Also disclosed are electrical machines (1) that comprise a sensor (12, 14) to sense a voltage over a single coil of the two coils connected in series and a controller (11) to measure the voltage through the sensor (12, 14) and determine a fault condition of the electrical machine (1) based at least on the measured voltage (ea1, ea2, ea3, ea4) over time. Also disclosed are wind turbines (160) having corresponding generators.