Various embodiments include a driving device for a motor vehicle comprising: an electric machine with a stator and a rotor driven by the stator for propelling the motor vehicle; a blower wheel driven by the rotor to convey air for cooling at least a first portion of the electric machine; an electric component supplying the electric machine with electrical energy; and a heat exchanger downstream of the blower wheel transferring heat from a coolant to the air flowing around the heat exchanger.

A redundant control device for a three-phase electric motor of a steering system of a motor vehicle, having a primary control path and a secondary control path. The primary control path has a primary processing unit, and the secondary control path has a secondary processing unit. The primary control path is connected to a first phase winding of the electric motor, and the secondary control path is connected to a second phase winding and a third phase winding for actuating the electric motor, wherein each phase winding is assigned an individual converter.

An electronic assembly includes a flexible printed circuit board (PCB) circumferentially disposed around a motor and a thermal management assembly (TMA) thermally connected to the flexible PCB. One or more switching semiconductor devices are disposed on a first surface of the flexible PCB. The TMA includes a cooling jacket, at least one jacket manifold formed through the cooling jacket and a thermal compensation base layer thermally coupled to the cooling jacket. The cooling jacket is mounted around a circumference of the motor and has a mounting surface concentric with the circumference of the motor. The mounting surface is coupled to the first surface of the flexible PCB. The at least one jacket manifold has a fluid inlet and a fluid outlet defining a fluid flow area therebetween. The thermal compensation base layer is thermally coupled to the cooling jacket and the one or more switching semiconductor devices.

A centrifugal pump motor comprising a permanent magnet rotor, a wound stator that is separated from the permanent magnet rotor by means of a containment shell, a circuit board having a large electronic component electrically connected to it, and a motor housing with a plug connection. The centrifugal pump motor provides a robust design for a generic centrifugal pump motor, so as to prevent damage during installation and operation, as well as additionally ensuring a space-saving and compact arrangement of the electronic components, in order to enable optimal heat dissipation of the electronic components. Furthermore, a simple way of manufacturing is provided.

A motor assembly 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 includes a cooler to cool the oil therein.

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.

A motor includes: a motor housing; a shaft disposed inside the motor housing and extending along a rotation axis; a rotor having magnetism, and coupled to an outer circumferential surface of the shaft; a stator accommodated in the motor housing, disposed to be spaced apart from an outside of the rotor in a radial direction of the shaft, and wound around with a coil; a nozzle for charging a cooling fluid by applying a voltage, and spraying the cooling fluid to at least one of the rotor and the stator; and a charging plate disposed to be spaced apart from a spray hole of the nozzle, and changes a spray form of the cooling fluid by applying a voltage.

An electric machine includes a stator core having opposing first and second end faces, an outer surface between the end faces, and a plurality of fluid passageways defined within the stator core. Each fluid passageway includes an entrance hole defined in the outer surface and an inboard passage extending along a length of the core and in fluid communication with the entrance hole. Each fluid passageway further includes an outboard passage extending along a length of the core and having a first exit hole defined in the first end face and an interconnecting passage connecting the inboard passage in fluid communication with the outboard passage.

A haptic actuator may include a housing that includes a ferromagnetic material having a first heat conductance, and a coil carried by the housing in a medial portion thereof and generating waste heat when electrically powered. The haptic actuator may also include a field member movable within the housing responsive to the coil. The field member may include at least one permanent magnet establishing a magnetic path with the housing. A heat spreading layer may be thermally coupled to the housing adjacent the coil. The heat spreading layer may have a second heat conductance greater than the first heat conductance to spread the waste heat from the coil to adjacent portions of the housing.

The present invention provides a trimmer, the trimmer comprises a handle assembly, a power mechanism installed at one end of the handle assembly, and a blade assembly connected to the power mechanism. The power mechanism has a housing assembly, a motor received in the housing assembly, and a power transmission assembly mounted on the housing assembly. The motor is an external rotor motor with a diameter greater than or equal to 50 mm. The power transmission assembly has pinion coaxially sleeved on an output shaft of the motor and a big gear meshing with the small gear, and a transmission ratio of the small gear to the big gear is less than 6. By such arrangement, the trimmer can obtain the best output effect under a. condition that the output power of the motor is unchanged.