Abstract: An electric motor, in particular an internal rotor motor, with a stator constructed from laminations and with a rotor arranged concentrically in the stator, with a housing surrounding the stator circumferentially, and with two housing caps for axially closing the housing at both ends and for accommodating and carrying a shaft of the rotor, wherein the laminations each have at least three crosspieces arranged on the circumference for creating at least one coolant channel between the stator and the housing, and wherein the at least one coolant channel can be bounded by the housing caps in a fluidtight manner.

Abstract: An auxiliary heating system for motor vehicles driven by electric motors and a method for realizing an auxiliary heating function in a motor vehicle having an electric drivetrain.

Abstract: A method for operating a drive system of a motor vehicle which is equipped with at least two E-machines, the drive system, as well as to a motor vehicle provided with the drive system.

Abstract: A charging device and a method for charging an electrical energy storage device of a vehicle, with a DC converter for converting an input DC voltage into an output DC voltage. A winding of an electrical machine is part of the DC converter. The winding has at least two coils. A control unit is designed for the purpose of switching the at least two coils electrically in series for the charging of the electrical energy storage device. The at least two coils form an inductance of the DC converter.

Abstract: A method for checking an operation of an electric machine, which has three phases. For pulses of a first electric variable of the three phases, a pulse width modulation is carried out. Depending in each case on a positioning of electromechanical components of the electric machine with respect to one another, the first electric variable has a pulse with a longest pulse width for a first of the three phases, a pulse with an intermediate pulse width for a second of the three phases, and a pulse with a shortest pulse width for a third of the three phases. A cycle of the pulse width modulation is delimited by two points in time.

Abstract: An electric motor, in particular an internal rotor motor, with a stator constructed from laminations and with a rotor arranged concentrically in the stator, with a housing surrounding the stator circumferentially, and with two housing caps for axially closing the housing at both ends and for accommodating and carrying a shaft of the rotor, wherein the laminations each have at least three crosspieces arranged on the circumference for creating at least one coolant channel between the stator and the housing, and wherein the at least one coolant channel can be bounded by the housing caps in a fluidtight manner.

Abstract: An auxiliary heating system for motor vehicles driven by electric motors and a method for realizing an auxiliary heating function in a motor vehicle having an electric drivetrain.

Abstract: A charging device and a method for charging an electrical energy storage device of a vehicle, with a DC converter for converting an input DC voltage into an output DC voltage. A winding of an electrical machine is part of the DC converter. The winding has at least two coils. A control unit is designed for the purpose of switching the at least two coils electrically in series for the charging of the electrical energy storage device. The at least two coils form an inductance of the DC converter.

Abstract: A method for operating a drive system of a motor vehicle which is equipped with at least two E-machines, the drive system, as well as to a motor vehicle provided with the drive system.

Abstract: A method for checking an operation of an electric machine, which has three phases. For pulses of a first electric variable of the three phases, a pulse width modulation is carried out. Depending in each case on a positioning of electromechanical components of the electric machine with respect to one another, the first electric variable has a pulse with a longest pulse width for a first of the three phases, a pulse with an intermediate pulse width for a second of the three phases, and a pulse with a shortest pulse width for a third of the three phases. A cycle of the pulse width modulation is delimited by two points in time.