DEVICE FOR SPEED-DEPENDENT BRAKING TORQUE CONTROL FOR ELECTRICAL MACHINES EXCITED BY PERMANENT MAGNETS

DEVICE FOR SPEED-DEPENDENT BRAKING TORQUE CONTROL FOR ELECTRICAL MACHINES EXCITED BY PERMANENT MAGNETS

A device for speed-dependent braking torque control for electrical machines excited by permanent magnets includes a switching device deliberately short-circuits the electrical machine. The switching device is controlled as a function of an induced voltage generated by the electrical machine. If the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: SCHALLER, Sebastian
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:A device for speed-dependent braking torque control for electrical machines excited by permanent magnets includes a switching device deliberately short-circuits the electrical machine. The switching device is controlled as a function of an induced voltage generated by the electrical machine. If the induced voltage falls below a defined value, the switching device reverses the short-circuited state of the electrical machine to cause the braking torque to reduce to zero and the speed to increase again. The speed can thus be controlled within a range by alternately opening and closing the switching device.