Granted Patent B2

US 12,728,744 · App. 18/292,404 · Granted Sep 8, 2026

Inventors: Nathan Tröster (Stuttgart, DE); Urs Boehme (Ehningen, DE); Markus Orner (Rennigen, DE)

Assignee: MERCEDES-BENZ GROUP AG

B60L53/24B60L53/14B60L2210/40

Abstract

Claims (21)

1 . An electrical drive system for a vehicle, the electrical drive system comprising:

an electrical three-phase machine configured to drive the vehicle;

an electrical energy storage device configured to electrically supply the electrical three-phase machine during a driving operation of the vehicle;

an inverter electrically coupled to the electrical energy storage device, wherein the inverter is a component of the electrical three-phase machine, and wherein the inverter is a 3-level inverter;

a charging connection on a vehicle side configured to electrically couple the electrical energy storage device to a vehicle-external charging unit; and

a switching device configured to electrically couple the charging connection on the vehicle side to the inverter of the electrical three-phase machine to charge the vehicle, wherein the switching device has an electromagnetic compatibility (EMC) filter configured to protect the vehicle-external charging unit from interference,

wherein the switching device is configured to directly connect, via the EMC filter, one phase of the charging connection on the vehicle side to a center tap of the inverter, and

wherein the inverter is configured to transform a charge voltage of the charging connection on the vehicle side into a supply voltage for charging the electrical energy storage device.

2 . The electrical drive system of claim 1 , wherein, in the charging operation of the vehicle, the inverter is a boost converter.

3 . The electrical drive system of claim 1 , wherein

in a first switching position of the switching device, the charging connection on the vehicle side is connected directly to the electrical energy storage device, and

in a second switching position of the switching device, the charging connection on the vehicle side is connected to the inverter.

4 . A method for operating an electrical drive system of a vehicle, the method comprising:

electrically supplying, during a driving operation of the vehicle, an electrical three-phase machine by an electrical energy storage device so that the vehicle is driven by the electrical three-phase machine; and

coupling, during a charging operation of the vehicle, a vehicle-side charging connection of the vehicle to an inverter of the electrical three-phase machine,

wherein a charge voltage of the charging connection on the vehicle side is transformed by the inverter into a supply voltage for charging the electrical energy storage devices,

wherein the inverter of the electrical three-phase machine is a 3-level inverter,

wherein the electrical drive system has a switching device, by which the charging connection on the vehicle side is coupled to the inverter of the electrical three-phase machine for the charging operation of the vehicle,

wherein the switching device has an electromagnetic compatibility (EMC) filter via which the vehicle-external charging unit is protected from interference, and

wherein the switching device is configured to directly connect, via the EMC filter, one phase of the charging connection on the vehicle side to a center tap of the inverter.

5 . The electric drive system of claim 1 , wherein the switching device is configured to connect another phase of the charging connection on the vehicle side directly to the electrical energy storage device.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (77)