METHOD AND APPARATUS FOR BRAKING A MOTOR

The method involves controlling a braking current of an elevator motor (4) e.g. permanently magnetized synchronous motor, by opening and closing with short pulses of a negative changeover contacts (10) or positive changeover contacts (17) of the inverter (16) of a frequency converter (2). A braking...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KALLIONIEMI, Antti, SYRMAN, Timo
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERATION
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Beschreibung
Zusammenfassung:	The method involves controlling a braking current of an elevator motor (4) e.g. permanently magnetized synchronous motor, by opening and closing with short pulses of a negative changeover contacts (10) or positive changeover contacts (17) of the inverter (16) of a frequency converter (2). A braking power is transmitted via the motor to an intermediate circuit of the frequency converter. A control device controls the frequency converter and receives its operating electricity from the braking power of the motor. An independent claim is also included for an arrangement for braking a synchronous motor used with a frequency converter.