A method for controlling a multiphase frequency converter for controlling an electric machine which is suitable as a traction drive of a vehicle. The frequency converter includes power circuit pairs with series-connected first and second power switches. The first power switch is connected to a DC voltage and the second power switch is connected to a ground of the DC voltage. Each node between the first power switch and the second power switch is connected to the respective phase conductor of the electric machine. The method includes ascertaining whether a fault is present, if a fault is present and a control signal at the first and/or the second power switch is not active: assessing whether the frequency converter should be switched into the short-circuit mode or into the freewheeling mode based on the phase conductor currents and/or based on the position of the rotor of the electric machine.
PERMANENT MAGNET-EXCITED ELECTRIC MACHINE
2016-12-29
Patent
Electronic Resource
English
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |