A machine for obtaining very high power density is provided, significantly increasing the air-gap magnetic flux density and eliminating the ferromagnetic steel traditionally employed to carry and shield magnetic flux. In one embodiment, an arrangement of main coils and a set of compensating coils is employed to cancel out the field outside the machine without the use of iron while maintaining air gap field levels that are 3 to 10 times greater than conventional machines.

A hybrid module for a hybrid drive unit, where the hybrid module may have a stream of coolant flowing through it, which also flows through a power electronics module for operating the hybrid module is provided. A power electronics module and to a method for installing a hybrid module is also provided.

A motor unit includes a motor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage is includes a cooler to cool the oil therein.

A method is disclosed for determining a vibration behavior of an electric motor, in particular an electric motor of a fan, and/or its installation environment, wherein a rotary motion of a rotor of the electric motor can be braked in a braking process. The disclosed method comprises: generating a jolt by triggering a braking process or an acceleration process or by changing a braking process or an acceleration process, generating detected vibration values by detecting vibrations of at least a part of the electric motor by means of at least one vibration sensor, determining spectral components by means of a frequency analysis of the detected vibration values, and determining a vibration behavior of the electric motor and/or its installation environment by evaluating the spectral components.

Further disclosed is a corresponding electric motor, fan, and system, each of which may be configured to carry out the method.

In a cooled housing for the stator of a direct drive, cooling ducts extend on an outer peripheral surface of the housing, the cooling ducts being sealed by an annular cover extending around the peripheral surface. The cover includes openings as an inlet and outlet for a cooling medium, and the cover is arranged such that sections of the peripheral surface of the housing remain free.

Provided is a reactor in which it is possible to reduce molding failures in inner resin portions when molding the inner resin portions. A reactor includes: a coil having winding portions; and a magnetic core having inner core portions and outer core portions. The reactor further includes: inner resin portions that fill gaps between the winding portions and the inner core portions; and inner interposed members that are interposed between the winding portions and the inner core portions, and form resin flow paths. The inner interposed members have spacers arranged between the winding portions and the inner core portions. The spacers are provided with air discharge paths that are in communication with the resin flow paths, and extend in the axial direction of the winding portions to at least one end face side of the winding portions.

An electric machine having a stator arranged in a machine housing and a rotor mounted rotatably relative to the stator about an axis of rotation, wherein the machine housing includes at least one coolant inlet port for supplying coolant to the machine housing and at least one coolant outlet port for draining coolant from the machine housing. It is provided that the coolant inlet port empties into a distribution annulus and several housing coolant ducts emerge from the distribution annulus and extend beyond the stator, when viewed in the axial direction, and are connected fluidically, on their side facing away from the distribution annulus, to stator cooling duct inlets of stator cooling ducts formed in the stator, which pass entirely through the stator in the axial direction.

The invention relates to a fluid-cooled active part (1) for an electric machine (38), wherein the active part (1) is substantially cylindrical or hollow cylindrical, having axially extending grooves (2), at least one electrical conductor (3), which is arranged in the associated groove (2) at least in some sections and which is composed of a plurality of partial conductors (4), one or more main insulators (5), each arranged between the associated conductor (3) and the associated groove (2), and partial-conductor insulators (6), each surrounding the associated partial conductor (4). The invention further relates to an electric machine (38), having such a fluid-cooled active part (1) designed as a stator (39) and/or such a fluid-cooled active part (1) designed as a rotatably mounted rotor (40), wherein the electric machine (38) can be operated with a voltage in the range of at least a few kilovolts, preferably a few tens of kilovolts. Finally, the invention relates to a drive System (41), having such an electric machine (38) and a fluid energy machine (42) for the fluid, wherein the fluid energy machine (42) is designed as a compressor, in particular for process gas, or as a pump, in particular for a process liquid. In order to provide, among other things, a high-performance fluid-cooled active part that is compact and, in particular, resistant in the environment of the fluid or of a process fluid, it is proposed, among other things, that the active part (1) has one or more cooling Channels (7) for conducting the fluid, in particular a process fluid, wherein each cooling Channel (7) is arranged between the associated main insulator (5) and the respective partial-conductor insulators (6).

A fluid pump, having a pump impeller, mounted so as to rotate around an axle, in a conveyed medium in a wet area and a conductor plate, which is arranged in a dry area sealed off from the conveyed medium, wherein radial forces of the axle are accommodated, on one side, by a separating wall between the dry area and the wet area and by a pump head on the other side. The object of the invention is to provide structural features to ensure an optimum dissipation of heat from a conductor plate and its power components to the conveyed medium without negatively impacting the hydraulic efficiency of the pump.

An on-board toilet cubicle for an aircraft, including a front long side and a rear long side; a front short side and a rear short side, which are each connected at one end to the front long side and at their other end to the rear long side, the long sides and the short sides enclosing an interior of the toilet cubicle, and the front and the rear long sides each being wider than the front and the rear short sides; a toilet unit with a toilet opening; and an L-shaped door for accessing the on-board toilet cubicle, the L-shaped door having one door leg in the front long side and one door leg in the front short side, the toilet unit arranged adjacent to the rear long side, and the door leg in the front long side being wider than the door leg in the front short side.