In a method, a short-circuit ring for a squirrel cage of an electric machine is produced through an automated additive production method in one piece with a recess for receiving one end of a cage bar. Material is introduced into a well with a well contour adjacent to the recess on a front axial end of the short-circuit ring through the additive production method, and introduction of the material is repeated into further such wells until all the wells to be filled have been provided with the material, so that the short-circuit ring is connected to the cage bars in an electrically conductive and mechanically robust manner.

An electric drive unit with an electric machine arranged in a motor housing. The electric machine has a rotor and a stator. A transmission is arranged in a transmission housing and driven by the electric machine. A cooling sleeve is provided, which forms a radially outward facing hollow space for a coolant by virtue of a spiral-shaped circumferential web between itself and the surrounding motor housing. Furthermore the cooling sleeve has a holding web which is designed to be clamped between two motor housing components.

A stack of laminations for a stator of an electric machine, wherein each lamination comprises a plurality of teeth, and a plurality of holes, wherein the laminations are aligned relatively to one other such that the teeth form winding spaces for receiving stator windings, and the holes form at least one axially extending cooling channel inside the stack, wherein adjacent holes of at least two adjacent laminations are geometrically different.

A stator assembly for use in an axial flux electric motor includes a plurality of tooth assemblies and a plurality of circumferentially-spaced stator bases that are each coupled to at least one tooth assembly. The stator assembly also includes a plurality of circumferentially-spaced bridge members. Each bridge member is configured to engage a pair of circumferentially adjacent stator bases to apply an axial pre-load force to the pair of stator bases and to create a flux path between the adjacent stator bases.

The invention relates to an actuator with a modular system for creating a plug-in gearbox, wherein the modular system comprises at least one output gear wheel and at least one plug-in element, and wherein a plug-in gearbox with one to five stages can be created by the modular system

A position sensor includes a plurality of E-shaped ferromagnetic cores arranged to define a circular opening therethrough to receive a shaft. Each E-shaped ferromagnetic core has a plurality of teeth, wherein adjacent E-shaped ferromagnetic cores of the arranged plurality of E-shaped ferromagnetic cores have an overlapping tooth. The position sensor further includes a frame surrounding the arranged plurality of E-shaped ferromagnetic cores, with the E-shaped ferromagnetic cores coupled to the frame.

An axial field rotary energy device or system includes an axis, a PCB stator and rotors having respective permanent magnets. The rotors rotate about the axis relative to the PCB stator. A variable frequency drive (VFD) having VFD components are coupled to the axial field rotary energy device. An enclosure contains the axial field rotary energy device and the VFD, such that the axial field rotary device and the VFD are integrated together within the enclosure. In addition, a cooling system is integrated with the enclosure to cool the axial field rotary energy device and the VFD.

The present invention provides a direct current motor, including: a casing; m pairs of brushes fixed within the casing; a stator provided within the casing, including m main poles corresponding to the m pairs of brushes, and n field winding parts; and a rotor provided within the stator, wherein each pair of main poles includes an S-polarity main pole and an N-polarity main pole, two neighboring main poles are different in polarity, the two brushes in each pair of brushes are arranged at neighboring positions, each pair of brushes includes an S-pole corresponding brush corresponding to the S-polarity main pole, and an N-pole corresponding brush corresponding to the N-polarity main pole, each field winding part includes m field winding units corresponding to the m pairs of main poles, respectively, each field winding unit is made up of field coils formed by winding an insulated conductor strip, which is made of a metal wire coated with an insulating layer, around one pair of main poles corresponding to each other, and m is a positive integer not less than 2, and n is 1 or 2.

In a first aspect, a method for removing an electromagnetic module from an electrical machine is provided. The electrical machine comprises a plurality of electromagnetic modules having an electromagnetic material. The electromagnetic modules comprise base and a support extending from the base and supporting the electromagnetic material. The base comprises a bottom surface and a first side surface. The first side surface comprises an axially extending groove defining a cooling channel with an axially extending groove of a first side surface of an adjacent electromagnetic module. The method comprises inserting a rod in a cooling channel formed by the groove of the electromagnetic module to be removed and a groove of an adjacent electromagnetic module; releasing the electromagnetic module to be removed from a structure of the electrical machine; and sliding the electromagnetic module to be removed along the rod.

A stator segment of a stator of a dynamoelectric machine includes slotted laminations arranged axially one behind the other, such that substantially axially extending slots are formed. Coils are arranged in the slots, wherein one coil side or two coil sides of different coils are arranged in a slot, The laminations have at least one open slot on their outer boundary sides parallel to the slot. The coil skies are fixed in the open slots by an amagnetic fastener on the stator segment