The converter (2) has a power-output stage (3) whose input side (7) is short-circuited by an electronic switching element (12). A control circuit (13) of the element is transferred into an activated state if a voltage applied at an intermediate circuit capacitor (9) at the input side falls below a threshold value. A short-circuit of the element is releasable in the activated state if the voltage reaches or exceeds another threshold value. A switching input (15) of the element is switchable to a zero potential in a non-activated state with three deactivation elements (16, 17). The three deactivation elements are designed as optical couplers, openers and shutters or switches, respectively. The electronic switching element is designed as a thyristor. An independent claim is also included for a drive unit for a ropewinder.
Frequenzumrichter, Verfahren zum Bremsen eines Synchronmotors und Antriebseinheit
Frequency inverter, method for braking a synchronous motor and drive unit
Convertisseur de fréquence, procédé de freinage d'un moteur synchrone et unité d'entraînement
01.01.2020
Patent
Elektronische Ressource
Deutsch
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B66B Aufzüge , ELEVATORS / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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