Abstract: A method for operating an electric machine including a rotor and a stator is connected to a first or a second power electronics assembly (PEA), the first or the second PEA including a circuit arrangement that produces a freewheeling condition or an active short circuit condition for a winding of the rotor or the stator, to a DC voltage network having a battery, and the first or the second PEA including an inverter formed by the circuit arrangement. The method includes, in response to a primary fault signal indicating a fault the first or the second PEA, actuating the first or the second PEA to produce the freewheeling condition, and in response to a secondary fault signal indicating a nonreceptiveness of the battery for power fed by the electric machine to the DC voltage network, actuating both the first and the second PEA to produce the active short circuit condition.

Abstract: A method for operating an electrical circuit, wherein the electrical circuit includes a DC converter, an inverter and an electric machine, wherein the inverter is connected on the direct current side to the output of the DC converter and on the alternating current side to the electric machine, wherein the electric machine is operated using a torque specification and/or a rotational speed specification, wherein the level of the output voltage of the DC converter is set as a function of a current torque specification and/or a current rotational speed specification.

Abstract: A method for operating an electrical circuit, wherein the electrical circuit includes a DC converter, an inverter and an electric machine, wherein the inverter is connected on the direct current side to the output of the DC converter and on the alternating current side to the electric machine, wherein the electric machine is operated using a torque specification and/or a rotational speed specification, wherein the level of the output voltage of the DC converter is set as a function of a current torque specification and/or a current rotational speed specification.

Abstract: An electric machine, having a shaft as well as a cooling system, which has at least one cooling channel formed by at least one component of the electric machine. The cooling system is filled with an electrically conductive coolant. The shaft is in electrical contact with the coolant and is grounded via the coolant.

Abstract: Electric machine, including a stator on an at least partially electrically conductive housing located on a reference potential, on which are formed slot-like receptacles for stator windings, upon which slot-shaped receptacles are formed for the stator windings, wherein a closure element closing the receptacle on the side of the rotor is provided in each case in the receptacles, and a rotor rotatably mounted in the stator, wherein the closure element is provided with a flat, electrically conductive conductor region for shielding the stator windings from the rotor, wherein the conductor region is connected in an electrically conductive manner to the housing.

Abstract: An electric machine, having a shaft as well as a cooling system, which has at least one cooling channel formed by at least one component of the electric machine. The cooling system is filled with an electrically conductive coolant. The shaft is in electrical contact with the coolant and is grounded via the coolant.

Abstract: An electric machine includes a housing, a driveshaft and a rotor which is mounted on the driveshaft. The driveshaft is supported on the housing by at least one rolling-contact bearing and in addition by an electrically-conductive slide bearing which also establishes an electric connection between the driveshaft and the housing.

Abstract: An electric machine for a motor vehicle, includes a rotor, and a stator. The stator has a coil device for generating a magnetic rotary field for driving the rotor. the coil device has a soft magnetic flux-guiding device for guiding the rotary field, wherein the coil device is only partially arranged in the flux-guiding device, wherein at least one winding overhang of the coil device extends out of the flux guiding device into an environment of the stator. The electric also includes and an electrically conductive shielding element arranged on the at least one winding overhang and configured to electrically and/or electromagnetically shield the winding overhang against an environment, wherein the shielding element is connected to a frame potential connection of the electric machine.

Abstract: Electric machine, including a stator on an at least partially electrically conductive housing located on a reference potential, on which are formed slot-like receptacles for stator windings, upon which slot-shaped receptacles are formed for the stator windings, wherein a closure element closing the receptacle on the side of the rotor is provided in each case in the receptacles, and a rotor rotatably mounted in the stator, wherein the closure element is provided with a flat, electrically conductive conductor region for shielding the stator windings from the rotor, wherein the conductor region is connected in an electrically conductive manner to the housing.

Abstract: An electric machine for a motor vehicle, includes a rotor, and a stator. The stator has a coil device for generating a magnetic rotary field for driving the rotor. the coil device has a soft magnetic flux-guiding device for guiding the rotary field, wherein the coil device is only partially arranged in the flux-guiding device, wherein at least one winding overhang of the coil device extends out of the flux guiding device into an environment of the stator. The electric also includes and an electrically conductive shielding element arranged on the at least one winding overhang and configured to electrically and/or electromagnetically shield the winding overhang against an environment, wherein the shielding element is connected to a frame potential connection of the electric machine.

Abstract: An electric machine includes a housing, a driveshaft and a rotor which is mounted on the driveshaft. The driveshaft is supported on the housing by at least one rolling-contact bearing and in addition by an electrically-conductive slide bearing which also establishes an electric connection between the driveshaft and the housing.