A control device (2) for an inverter (1) which has a DC voltage input (3) and a power unit (5) with three half-bridges (11u, 11v, 11w) each formed by two power switching elements (13u, 13v, 13w, 15u, 15v, 15w), the control device (2) being arranged to driving the power switching elements (13u, 13v, 13w, 15u, 15v, 15w) in a normal operating mode for converting a DC voltage applied to the DC voltage input (3) into a polyphase AC current provided at an AC current output (4), wherein the control means (2) is adapted to evaluate a signal state of a signal (21) indicating a disconnection of a DC voltage source (9) from the DC voltage input (3) and to control the power switching elements (13u, 13v, 13w, 15u, 15v, 15w) in dependence on a result of the evaluation for alternately adopting a first switching pattern causing DC braking and a second switching pattern causing freewheeling.
CONTROL DEVICE FOR AN INVERTER, INVERTER FOR AN ASYNCHRONOUS MACHINE, VEHICLE AND METHOD FOR OPERATING AN INVERTER
27.01.2022
Patent
Elektronische Ressource
Englisch
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 |
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