The present invention relates to an in-wheel motor driving apparatus for reducing weight, improving Hall sensor assembly performance, and reducing a defect rate. According to one embodiment of the present invention, the weight of an in-wheel motor can be reduced by separating a suspension housing and a shaft and applying different materials thereto. Furthermore, the ease of assembling a Hall sensor can be improved, and the defect rate can be reduced.

A motor controller includes a housing, a power circuit board, and a control circuit board. The housing includes a first mounting platform, a second mounting platform, and a side wall. There is a height difference between the first mounting platform and the second mounting platform. The first mounting platform is disposed on an upper part of the side wall, and the second mounting platform is disposed on a middle part of the side wall. The second mounting platform is disposed on one side of the first mounting platform. The first mounting platform and the side wall form an upper chamber, and the control circuit board and the power circuit board are disposed in the upper chamber. The control circuit board is closer to the first mounting platform than the power circuit board. The second mounting platform and the side wall form a lower chamber communicating with the upper chamber.

A fan module including a first casing, a second casing, a supporting assembly, a stator assembly, and a rotor assembly. The first casing includes a first vent. The second casing is connected to the first casing and an accommodating space is formed between the first casing and the second casing. The supporting assembly is disposed at the accommodating space, connected to the second casing, and includes a first end and a second end. The stator assembly is disposed at the accommodating space, fixed on the second casing, and disposed around the supporting assembly. The rotor assembly is disposed at the accommodating space, rotatably disposed around the stator assembly, and corresponding to the first vent. The first end of the supporting assembly passes through the rotor assembly and the first vent for protruding out of the first casing.

A hub-type electric driving device comprises: a housing having a wheel formed in the shape of a cup, and a cover of which the outer peripheral part is coupled to the opening of the wheel; a motor shaft having both end portions fixedly provided on a body outside of the housing; first and second bearings provided respectively in through-holes formed in the centers of the wheel and the cover, in order to rotatably support the housing around the motor shaft; and a BLDC motor which is embedded inside the housing and rotates the housing around the motor shaft, wherein the BLDC motor comprises: a rotor in which a back yoke and a magnet are stacked on a cylindrical inner wall of the wheel; and a stator of which the outer peripheral part faces the magnet of the rotor while having an air gap therewith and of which the central part is coupled to the outer circumference of the motor shaft so as to be fixed thereto, and which is for applying a rotating magnetic field to the rotor, wherein the stator has an integrated core frame in which a plurality of teeth radially extend on the outer circumference of an annular yoke, and an inner race coupled to the motor shaft is connected to the inside of the annular yoke through a plurality of bridges.

A flywheel system includes a rotor configured to rotate about a rotation axis. The flywheel system further includes a fixture and an active magnetic bearing module for actively stabilizing the rotor relative to the fixture. The active magnetic bearing module includes a plurality of first magnetizable elements mechanically coupled to or integrated in the rotor, and a plurality of electromagnets mechanically coupled to the fixture and configured to magnetically couple with the plurality of first magnetizable elements to actively stabilize the rotor relative to the fixture. Each of the first magnetizable elements is farther than each of the electromagnets from the rotation axis.

An HVAC blower motor (10) includes a stator (12) and a rotor (14). The stator (12) include electro-magnets (12a) energized at pre-determined energizing frequency. The rotor (14) angularly moves relative to the stator (12) due to pulsating magnetic field between the stator (12) and the rotor (14). The rotor (14) includes an output shaft (24), a magnet holder (14a) and a plurality of permanent magnets (20). The permanent magnets (20) are configured to interact with the cyclically energized electro-magnets (12a) to cause pulsating magnetic field between the stator (12) and the rotor (14) to cause angular movement of the rotor (14) relative to the stator (12). The magnet holder (14a) includes a strip (15) of vibration damping material secured thereto along an outer periphery thereof to change the natural frequency characteristic of the wall portion 14c is subjected to.

An electric machine for converting between electrical and rotary mechanical energy includes a rotor journaled to rotate about an axis of rotation, and a stationary stator mounted adjacent to the rotor. The stator has a ferromagnetic backiron with a surface facing the rotor across a magnetic airgap and having windings applied in a winding pattern formed directly onto the stator backiron and adhered to its surface with a pre-applied tacky adhesive. The windings magnetically exert torque upon the rotor across the magnetic armature airgap in response to electric power applied to the windings. The rotor has permanent magnets that generate magnetic flux across the airgap and through the windings. The windings are comprised of pre-bundled multiple individually insulated conductor strands that are electrically connected in parallel but are electrically insulated from each other along their lengths inside said magnetic armature airgap.

A rotating electric machine includes a field that includes a magnet unit having a plurality of magnetic poles, an armature including a multi-phase armature coil, and an electric power conversion device that is configured to perform electric power conversion and supply electric power resulting from the electric power conversion to the armature. Moreover, one of the field and the armature is configured as a rotor while the other is configured as a stator. The electric power conversion device includes at least one band-shaped busbar through which electric current flows during the electric power conversion. The at least one busbar has a cross section where a thickness in a lateral direction of the cross section at one end of the cross section in a longitudinal direction of the cross section is smaller than a thickness in the lateral direction at the other end of the cross section in the longitudinal direction.

The present invention relates to an arrangement (O1, S1) of an outer rotor electric machine for reducing eddy current losses of the outer rotor electric machine (I). The outer rotor electric machine comprises a rotatably arranged rotor (10) and a stator (20). Said rotor comprises an outer rotor portion (12) surrounding said stator (20) or part of said stator and a wheel like end wall portion (14). One end (22a) of said stator (20) is arranged to face said end wall portion (14). The arrangement comprises a plurality of openings (O1) distributed on said end wall portion (14) so as to reduce appearance of eddy currents associated with said end wall portion (14) during operation of said electric machine (I). The present invention also relates to an outer rotor electric machine. The present invention also pertains to a platform.

A brushless motor is provided including a rotor rotating around a center axis and a stator including a stator core and stator teeth radially extending from the stator core forming stator slots therebetween. Each stator tooth includes a radial main body and a tooth tip extending substantially laterally from an end of the radial main body opposite the stator core, and stator windings are wound around the stator teeth. Winding retention wedges are axially received within the slots, each winding retention wedge comprising: a first portion received within gaps formed between tooth tips of adjacent stator teeth, and a second portion received at least partially between adjacent stator windings to apply a force substantially in a range of a radially-inward direction to a lateral direction to the adjacent stator windings.