A power converter, an electric drive system and a method for operating a power converter are disclosed. The power converter has connections for connecting to a direct voltage source and connections for electrical connection to phase lines of the electric drive machine. The power converter is configured to convert a direct voltage from the direct voltage source via a direct voltage intermediate circuit into an alternating voltage in order to drive the drive machine. The power converter includes bridge branches for connecting a high-potential section to a low-potential section. A bridge branch includes two half branches with at least one switching device. A resulting nominal voltage of a half branch is greater than a counter-electromotive peak voltage between two phase lines at the maximum rotational speed of the drive machine. A half branch of a bridge branch includes a series circuit of two or more than two switching devices.
Electric drive system and method for operating a power converter
2022-02-15
Patent
Elektronische Ressource
Englisch
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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B61C Lokomotiven , LOCOMOTIVES / 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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