Daimler Ag

Mercedes-benz Group Ag

Joerg Weigold

Moritz Haussmann

Urs Boehme

Christian Kloeffer

Stefan Haehnlein

Jan Philipp Degel

Maximilian Hepp

A method for operating an electric drive system of a vehicle where the electric drive system has an electric three-phase motor, a battery, and an inverter via which the electric three-phase motor is couplable electrically to the battery. A neutral point of the electric three-phase motor is couplable electrically to a positive pole connection of a direct current charger connection of the electric drive system. A negative potential line of the battery is couplable electrically to a negative pole connection of the direct current charger connection of the electric drive system. The neutral point is couplable electrically via a first switch to the positive pole connection. The negative potential line is couplable electrically via a second switch to the negative pole connection. The positive pole connection is couplable electrically via a third switch to a tap of an intermediate circuit capacitor.

Method for operating an electric drive system for a vehicle

A circuit arrangement of a motor vehicle includes a high-voltage battery for storing electrical energy, an electric machine for driving the motor vehicle, a converter via which high-voltage direct current voltage provided by the high-voltage battery is convertible into high-voltage alternating current voltage for operating the electric machine, and a charging connection for providing electrical energy for charging the high-voltage battery. The converter is a three-stage converter having a first switch unit which is assigned to a first phase of the electric machine. The first switch unit has two switch groups connected in series which each have two insulated-gate bipolar transistors (IGBTs) connected in series, where a connection is disposed between the IGBTs of one of the two switch groups, which connection is electrically connected directly to a line of the charging connection.

Circuit arrangement for a motor vehicle, in particular for a hybrid or electric vehicle

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Stuttgart, Germany

Joerg Weigold