Abstract: An electric drive includes a motor assembly, an output assembly, a transmission stage and one or more power electronics units connected to one or more electric voltage sources in order to control electrical sub-phases of electric machines of the motor assembly. The electric machines have motor shafts disposed parallel to one another. The transmission stage is connected to the motor assembly and also connected to the output assembly. The transmission stage has a transmission sun connected to the output assembly and has a plurality of transmission planets each connected to a respective one of the electric machines. The transmission planets are each fixed on a respective one of the motor shafts and are disposed in an annular manner around the transmission sun and roll on the transmission sun in a torque-transmitting manner. A method for operating an electric drive and a serial hybrid drive train are also provided.

Abstract: An electric drive includes a motor assembly, an output assembly, a transmission stage and one or more power electronics units connected to one or more electric voltage sources in order to control electrical sub-phases of electric machines of the motor assembly. The electric machines have motor shafts disposed parallel to one another. The transmission stage is connected to the motor assembly and also connected to the output assembly. The transmission stage has a transmission sun connected to the output assembly and has a plurality of transmission planets each connected to a respective one of the electric machines. The transmission planets are each fixed on a respective one of the motor shafts and are disposed in an annular manner around the transmission sun and roll on the transmission sun in a torque-transmitting manner. A method for operating an electric drive and a serial hybrid drive train are also provided.

Abstract: An electric drive includes a motor configuration with a plurality of electric machines, an output configuration, and a transmission stage. The output configuration has a summing stage configured as a Ravigneaux set with a summing internal gear, a summing spider, two sets of summing planets, and two summing suns. The transmission stage has a transmission sun, transmission planets, and a rotatably mounted transmission internal gear. The transmission sun is connected to the output configuration. The transmission planets are each connected to a respective one of the electric machines. The transmission planets roll on the transmission sun and on the transmission internal gear in a torque-transmitting manner. The transmission internal gear is fixedly connected to one of the two summing suns. The transmission sun is fixedly connected to another one of the two summing suns. A drive configuration for a motor vehicle is also provided.

Abstract: A continuously variable transmission has a drive shaft, a power takeoff shaft and a power branching device disposed therebetween and has a continuously variable power branch containing a variator, and a mechanical power branch parallel thereto. To provide a large adjustment range and a high level of efficiency in conjunction with a simple and space-saving configuration, the variator is an electromagnetic transmission with a rotatably mounted drive rotor connected to an input shaft, a rotatably mounted power takeoff rotor connected to an output shaft, and a stator connected fixed in terms of rotation and mounted axially displaceably. The rotors have permanent magnets which are each distributed circumferentially axially adjacent to one another and have alternating polarity. The stator has at least one short-circuit winding disposed radially adjacent to the permanent magnets and the effective transmission ratio being adjustable by axial displacement of the stator relative to the rotors.

Abstract: A continuously variable transmission has a drive shaft, a power takeoff shaft and a power branching device disposed therebetween and has a continuously variable power branch containing a variator, and a mechanical power branch parallel thereto. To provide a large adjustment range and a high level of efficiency in conjunction with a simple and space-saving configuration, the variator is an electromagnetic transmission with a rotatably mounted drive rotor connected to an input shaft, a rotatably mounted power takeoff rotor connected to an output shaft, and a stator connected fixed in terms of rotation and mounted axially displaceably. The rotors have permanent magnets which are each distributed circumferentially axially adjacent to one another and have alternating polarity. The stator has at least one short-circuit winding disposed radially adjacent to the permanent magnets and the effective transmission ratio being adjustable by axial displacement of the stator relative to the rotors.