Valeo eAutomotive Germany GmbH

A system and method for cooling the motor having a rotor with a rotor shaft that rotates around a rotation axis, a stator having a core and stator coils located at both axial ends of the core. The cooling system includes a fluid supply channel provided in the rotor shaft, a plurality of groups of fluid flow-out channels arranged on the rotor shaft and corresponding to the stator coil, and a fluid storage channel provided in fluid communication with the fluid supply channel and the fluid flow-out channels. The fluid supply channel is adjacent to at least one of the plurality of groups of fluid flow-out channels and at least partially extends into the fluid storage channel, so that the cooling fluid flowing out of the fluid supply channel enters the fluid storage channel and then flows out of the fluid flow-out channel to cool the stator coil.

Power converter having first, second and third lines, and a filter device having a first terminal connected to the first line, second terminal connected to the second line, and a third terminal connected to the third line. A first capacitor is provided via which a first current path is routed from the first terminal to the third terminal, a second capacitor via which a second current path is routed from the second terminal to the third terminal, a third capacitor connected between a center node, which is between the first capacitor and the second capacitor, and the third terminal. A switching device switches between a first filter mode, in which the first and second current paths are routed past the third capacitor to the third terminal, and a second filter mode, in which the first and second current paths are routed via the third capacitor to the third terminal.

An electric drive for a vehicle includes a stator including a stator winding and a stator core having a longitudinal axis and opposing axial first and second face sides, the stator winding forming a first winding head at the first face side and a second winding head at the second face side. A housing has an interior that forms a stator accommodation space and a radial stop, which delimits the stator accommodation space axially. A spacer is attached to the first face side at a radial position more outward than the first winding head and abutting against the stop.

Power converter includes first, second and third lines, and a filter device. First to third terminals are connected to the first to third lines, and first and second capacitors form a central node connected to the third terminal. Third and fourth capacitors are connected between first capacitor and first terminal, and second capacitor and second terminal. A switching device switches between first and second filter modes, the first forming a first interference current path on the first line from the first terminal via the third capacitor, a parallel connection of the first and second capacitors and the central node to the third terminal, and a second interference current path on the second line from the second terminal via the fourth capacitor, a parallel connection of the first and second capacitors and the central node. In second filter mode interference currents along the current paths is reduced.

A rotor for a motor includes multiple rotor segments arranged side by side in an axial direction parallel to a centre axis of the motor rotor, each of the rotor segments having one or more magnetic pole arranged in a circumferential direction around the centre axis. The motor rotor includes one or more V-shaped rotor segment set, the V-shaped rotor segment set being formed of three consecutive rotor segments, the magnetic pole of a middle rotor segment of the V-shaped rotor segment set being twisted by an angle θ in a twisting direction relative to a zero point angular position of the motor rotor.

An electric drive assembly system, a vehicle and a method for assembling an electric drive assembly system. The electric drive assembly system includes a housing including a main body and a cover. Disposed in the housing is an electric machine including a rotor shaft and a gearbox assembly which includes a gear input shaft connected to the rotor shaft and disposed coaxially therewith, to receive torque from the electric machine. An electric machine control module is configured to control the electric machine, and superposed with the electric machine and/or the gearbox assembly in a direction transverse to the gear input shaft. An electrical connection assembly, configured to electrically connect the electric machine control module to a stator of the electric machine.

Described is a method for producing an active part for a rotating electric machine. The method includes providing a core for the active part and shaped conductors which are inserted into the core. The core has an end side and a further end side situated opposite the end side. The core has slots arranged in a circumferential direction in which the shaped conductors are arranged. The shaped conductors extend from the end side to the further end side, and each shaped conductor has a free end which protrudes at the end side and has an end face. Two end faces are joined together and welded by means of a laser beam, which is guided along a pattern having a trajectory.

A bus bar assembly of a power converter that includes an inverter, a boost converter, and the bus bar assembly. The inverter is provided with an inverter circuit adapted for converting a direct current (DC) to an alternate current (AC), the inverter being contained within a housing. The boost converter contained within the housing and provided with a boost converter circuit adapted to step up voltage from a low voltage level to a high voltage level. The bus bar assembly includes three bus bars passed through a single electromagnetic compatibility (EMC) filter. The three bus bars include a positive bus bar, a negative bus bar, and a boost bus bar, all arranged within the housing and adapted to conduct positive DC power, negative DC power, and the output of the boost converter circuit, respectively.

A stator for an electric machine includes a distributed stator winding with N phase windings, P pole pairs, and a stator core having slots in which the stator winding is arranged. The stator core is subdivided into 2·P·N winding zones following each other in the circumferential direction and including axial recesses which form at least one set of recesses following each other. At least two recesses are part of one of the winding zones. Each pair of recesses that adjoin each other in the circumferential direction and are part of the same winding zone has a first angular distance from each other in the circumferential direction. Each pair of recesses which adjoin each other and are part of different winding zones has a second angular distance. In at least one set, the first and angular distance differ such that the set is an irregular set.

An oil cooling system for an electric machine that includes a housing and a stator accommodated in the housing, the stator having a first end part and a second end part in an axial direction of the electric machine. The oil cooling system includes an oil inlet, for receiving external cooling oil; a first annular oil application pipe, located at the first end part and in fluid communication with the oil inlet; and a second annular oil application pipe, located at the second end part and in fluid communication with the oil inlet. An axial oil application part is located between the first end part and the second end part and formed by a housing inner wall and a stator outer wall. The axial oil application part receives cooling oil from at least one of the first annular oil application pipe and the second annular oil application pipe.