Abstract: An electrical drive includes an electrical machine, a first converter stage connected to terminals of stator phase-windings of the electrical machine, and a second converter stage connected to intermediate points of the stator phase-windings. A control device determines first component currents and second component currents so that torque is generated in accordance with electrical machine control and magnetic levitation force is directed to a rotor of the electrical machine in accordance with levitation control when portions of the phase-windings between the terminals and the intermediate points carry both the first and second component currents and the other portions of the phase-windings carry the first component currents. The reference currents for the first converter stage are determined based on the first and second component currents, and the reference currents for the second converter stage are determined based on the second component currents.

Abstract: A position sensor for sensing position or motion, includes: a ferrite core, and a sensor coil configured to provide a sensor signal. The sensor coil is implemented on a printed circuit board, and the ferrite core is configured to be fitted into the printed circuit board.

Abstract: A semiconductor module includes a baseplate, a cover element attached to the baseplate so that detaching the cover element from the baseplate requires material deformations, and a semiconductor element in a room defined by the baseplate and the cover element. The semiconductor element is in a heat conductive relation with the baseplate and an outer surface of the baseplate is provided with laser machined grooves suitable for conducting heat transfer fluid. The laser machining makes it possible to make the grooves after the semiconductor module has been assembled. Therefore, regular commercially available semiconductor modules can be modified, with the laser machining, to semiconductor modules as disclosed.

Abstract: An electric motor construction is provided with a planetary gear system, including an annular thin-rimmed stator (1) as well as a torque takeoff shaft (2) concentric relative thereto. The construction includes inside the stator (1) an annular thin-rimmed rotor (3); a sun gear (4) fixedly coupled to the rotor and concentric with the takeoff shaft (2); an intra-rotor immovably coupled ring gear (5) with a toothed inner surface; planet gears (6) meshing with the ring gear and the sun gear; a planet carrier (7) that the planet gears are supported on; as well as a coupling arrangement (8) for transmitting torque of the rotor optionally directly or by way of the planet carrier to the torque takeoff shaft.

Abstract: A semiconductor module includes a baseplate, a cover element attached to the baseplate so that detaching the cover element from the baseplate requires material deformations, and a semiconductor element in a room defined by the baseplate and the cover element. The semiconductor element is in a heat conductive relation with the baseplate and an outer surface of the baseplate is provided with laser machined grooves suitable for conducting heat transfer fluid. The laser machining makes it possible to make the grooves after the semiconductor module has been assembled. Therefore, regular commercially available semiconductor modules can be modified, with the laser machining, to semiconductor modules as disclosed.

Abstract: A gas turbine arrangement, including a gas generator section (A), a power turbine section (B), and a generator section (C) coupled on a common shaft (10). The power turbine has its bearing block (12) provided with a copper cooling cup (9), which possesses a high thermal conductivity and conveys heat flux away from the side and block of the bearing and which has a design that enables the effect of a penetrating airflow.

Abstract: A rotor axle of a high speed permanent magnet machine including a first part and a second part, both manufactured from a magnetically non-conducting material. The parts include an inner end and an outer end, and they can be axially interconnected one after the other by the inner ends to constitute an integral rotor axle. Their outer ends include bearing structures to fit the rotor axle with bearings. A cylindrical and solid permanent magnet is provided coaxially with the first part and the second part in between them and magnetized perpendicularly to the axial direction of the cylinder. The inner end of the first part of the rotor axle includes a cylindrical external surface with an external thread, the inner end of the second part includes a cylinder sleeve having an internal base part corresponding in shape to the cylindrical permanent magnet to constitute a space for the permanent magnet.

Abstract: A stator of an electrical machine includes a stator core having a plurality of stator teeth and stator slots, and a stator winding having a plurality of stator coils. The width of each stator coil is one stator slot pitch, and the stator teeth are shaped to allow each stator coil to be installed by pushing the stator coil to surround one of the stator teeth. The stator coils include tubular cooling channels for conducting cooling liquid in the stator slots.

Abstract: A stator of an electrical machine that is straightforward to assemble and for which an efficient liquid cooling can be arranged includes a stator core (801) having a plurality of stator teeth and stator slots, and a stator winding having a plurality of stator coils (803). The width of each stator coil is one stator slot pitch, and the stator teeth are shaped to allow each stator coil to be installed by pushing the stator coil to surround one of the stator teeth. The stator coils include tubular cooling channels (804) for conducting cooling liquid in the stator slots. The stator winding is designed by taking into account the aspects related to the liquid cooling, and it has been noticed that a stator winding structure which is advantageous for arranging the liquid cooling has satisfactory electrical and magnetic properties too.