Abstract: An assembly according to an embodiment of the present disclosure includes, among other things, a synchronous machine including a rotating portion and a stationary portion, the rotating portion including at least one rotating diode coupled to a field winding, and the stationary portion including a stator winding and an exciter winding. A control unit includes a first gate and a second gate. The exciter winding is connected in series to the first gate and the second gate during a first operating mode to energize the exciter winding. The exciter winding is electrically connected in series to a first gate but is electrically disconnected from the second gate in a second, different operating mode to electrically disconnect the exciter winding from an exciter energy source. A method of operating a synchronous machine is also disclosed.

Abstract: An air blower capable of preventing a deformation of the vane wheel is provided. A cylindrical holder is provided on rotatable shaft. A vane wheel is provided on the outer circumference of the holder. The holder includes a top section including a plurality of first openings at one end thereof in the axial direction, and includes a flange including a plurality of second openings at the other end thereof, and the vane wheel includes first protrusions to be inserted into the first openings of the holder and fixed to the top section by deformed sections protruding from the first openings, and second protrusions to be inserted into the second openings of the holder and fixed to flange by deformed sections protruding from the second openings.

Abstract: A portable electronic device and a movable lens-shutting module thereof are provided. The movable lens-shutting module includes a magnetic field generator, a rotatable driving assembly and a movable shutter assembly. The rotatable driving assembly includes a rotatable magnetic element and a rotatable driving element fixed on the rotatable magnetic element. The rotatable driving element includes at least one driving rod. The movable shutter assembly includes at least one shutter element. The shutter element includes a lens opening corresponding to a lens and a receiving groove for receiving the driving rod. When the rotatable magnetic element and the rotatable driving element are concurrently moved by a magnetic force generated by the magnetic field generator, the shutter element is moved in a linear direction by moving the driving rod, so that the lens is exposed by the lens opening or is blocked by the shutter element.

Abstract: An electric machine includes a rotor configured to rotate about an axis of rotation, a stator having a stator core and a plurality of teeth annularly arranged on the stator core about the axis of rotation, a plurality of electromagnetic coils, and a base plate. Each coil of the plurality of electromagnetic coils may be mounted on a separate tooth of the plurality of teeth. The base plate may be located adjacent to the plurality of electromagnetic coils and the stator core. The base plate may have a first side and an opposing second side. The first side may be in thermal contact with the plurality of electromagnetic coils and the stator core. A liquid-coolant channel may be defined on the second side of the base plate such that as the coils and the stator core heats during operation, the base plate is configured to transfer the heat to a liquid coolant in the liquid-coolant channel to dissipate heat from the plurality of electromagnetic coils and the stator core.

Abstract: There are provided electric motors each having a rotor, a stator, and a plurality of conductive windings each disposed around a corresponding tooth of the stator. The rotor is to rotate about an axis of rotation defining an axial direction. The rotor includes a backiron and a plurality of magnets secured to an inner surface of the backiron. The stator is disposed inside the rotor and centered about the axis of rotation. The stator includes a plurality of teeth each extending radially relative to the axis of rotation towards the inner surface of the backiron and terminating in a corresponding tooth end disposed proximal to the inner surface.

Abstract: A stator of an electric motor includes a multilayer body including annular core sheets stacked in layers. A first annular core sheet includes linking portions, each of which defines a link between tips of two adjacent teeth and includes a seam. A first linking portion provides a link between teeth associated with a U phase. A second linking portion provides a link between teeth associated with a V phase. A third linking portion provides a link between teeth associated with a W phase.

Abstract: An electromagnetic rotary drive includes a ring-shaped magnetically effective core arranged around a stator and has a magnetic central plane. The stator is a bearing and a drive stator, with which, the rotor is contactlessly magnetically drivable about an axis of rotation, and with which the rotor is contactlessly magnetically levitatable with respect to the stator. The rotor actively magnetically levitated in a radial plane perpendicular to an axial direction, and passively magnetically stabilized in the axial direction and against tilting. The rotor includes a magnetically effective bearing ring arranged radially externally disposed and spaced from the magnetically effective core, and a bearing stator having a magnetically effective stator ring interacts with the bearing ring. The bearing stator is configured such that the stator ring passively magnetically stabilizes the rotor against tilting, and the bearing ring is connected to the magnetically effective core of the rotor via a connecting element.

Abstract: An electric motor includes a stator, a rotor having a tubular shape and disposed radially outside of the stator, and a fan mounting portion located on one side of the stator along an axial direction and mounted to the rotor. An end face of the fan mounting portion has a contact region that contacts a mounting surface of a fan, and a noncontact region that does not contact the fan.

Abstract: A motor includes a rotor housing, at least one magnet operably coupled to the rotor housing, a stator disposed within the rotor housing, and at least one sensor. The magnet corresponds to a rotor pole that provides a magnetic flux including a main flux and a leakage flux. The stator includes a plurality of stator poles. The main flux is configured to extend in a first direction towards at least one of the stator poles. The at least one sensor is configured to measure the leakage flux. The leakage flux is configured to extend in a second direction towards the at least one sensor. The first direction lies on a radial plane and the second direction lies out of the radial plane.

Abstract: An external rotor motor, including: a rotary shaft; a plastic-packaged stator including a sleeve base, a stator core, a terminal insulator, coil windings, and a plastic-packaged body; and an external rotor sleeving on the plastic-packaged stator. The terminal insulator is disposed on the end face of the stator core. The coil windings are coiled on the terminal insulator. The sleeve base is disposed in an axle hole in the center of the stator core. The rotary shaft is disposed in the sleeve base. Two ends of the rotary shaft are supported by the bearing. One end of the rotary shaft protrudes out from the sleeve base and is connected to the external rotor. The top of the sleeve base extends outwards to form a plurality of arms, and the plurality of arms each includes an outer end which is provided with a bolt.

Abstract: A magnetic core of an electric motor includes a central portion and a plurality of teeth extending outwardly from the central portion, the teeth disposed along a circumferential direction of the central portion. Each tooth includes a tooth body, two neck portions and two crown portions, the neck portions respectively connecting the crown portions to the tooth body, the two crown portions respectively extending beyond opposite sides of the tooth body. Each of the two neck portions of each tooth has a minimum width which is 0.1˜0.3 times of the width of the tooth body. The present invention further provides an electric motor that employs the magnetic core which can increase the peak value of the cogging torque of the motor.

Abstract: A motor having a stator with coupled teeth according to the present invention includes a stator which includes a circular base, a plurality of poles radially formed in the base, and a plurality of teeth formed on an outer diameter of the pole; and a rotor which includes a rotor housing in which the stator is positioned inside and a plurality of magnets facing the teeth are formed on an inner wall, wherein two teeth are symmetrically formed on an outer diameter portion for each pole, and the number of teeth is twice the number of poles.

Abstract: An assembly according to an embodiment of the present disclosure includes, among other things, a synchronous machine including a rotating portion and a stationary portion, the rotating portion including at least one rotating diode coupled to a field winding, and the stationary portion including a stator winding and an exciter winding. A control unit includes a first gate and a second gate. The exciter winding is connected in series to the first gate and the second gate during a first operating mode to energize the exciter winding. The exciter winding is electrically connected in series to a first gate but is electrically disconnected from the second gate in a second, different operating mode to electrically disconnect the exciter winding from an exciter energy source. A method of operating a synchronous machine is also disclosed.

Abstract: A direct current machine comprises a stator and a rotor, wherein one of these two has a plurality of magnets which are alternatively magnetized north and south, and the respective other part has a plurality of coils which are formed by teeth around which insulated wire is wound, wherein between these coils there are formed respective slots and the coils are combined in coil groups; and a current controlled inverter for driving the machine; wherein each coil group has a front terminal and a rear terminal and the coil groups are connected such that a defined wiring concept is formed and wherein the front terminals and end terminals are connected via an interconnection element which is specifically designed for a defined wiring concept.

Abstract: A motor includes a stationary unit and a rotary unit. The rotary unit includes a shaft, a magnet, and a rotor holder for holding the magnet on an inner circumferential surface thereof The rotor holder includes a top surface portion extending in a direction orthogonal to a center axis, a first surface portion extending radially outward from a radial outer end portion of the top surface portion, a second surface portion positioned axially below the top surface portion and having an outer diameter larger than an outer diameter of the first surface portion, a first connecting portion arranged to connect a radial outer end portion of the first surface portion and a radial outer end portion of the second surface portion, and a second connecting portion arranged to connect the radial outer end portion of the top surface portion and a radial inner end portion of the second surface portion.

Abstract: A motor and a rotary assembly of the motor are provided. The motor includes a rotary assembly and a stationary assembly supporting the rotary assembly. The rotary assembly includes a rotary shaft, a retainer rotating along with the rotary shaft, and a rotor magnet retained by the retainer. A portion of the rotor magnet engages with a portion of the retainer via interference fit, and a gap is defined between another portion of the rotor magnet and another portion of the retainer.

Abstract: A drive device includes a control unit with a substrate. The control unit is disposed on an opposite side of a motor relative to an output shaft of the motor. The substrate has electronic components mounted on the substrate. A motor line connects the substrate and a winding. A frame member bears the surface-mount electronic components on a first surface of the substrate. A bearing holder holds a bearing that bears a shaft. A motor line takeout part allows the motor line to extend toward the control unit. A partition wall separates the shaft and the control unit at a radial inside position of the motor line takeout part. Such a structure prevents foreign matter from intruding into a control unit accommodating space.

Abstract: A direct current machine comprises a stator and a rotor, one of them having a plurality of magnets alternatively magnetized north and south and the other one of them having a plurality of coils formed by winding insulated wire around teeth in order to provide a three-phase winding, wherein slots are formed between said coils and the coils are grouped in coil groups of four coils each, and a current controlled inverter for driving said machine, wherein each coil group has the same winding pattern so that each first coil of a coil group, seen in a direction of rotation, is wound in the same winding direction and two, in the direction of rotation, consecutive coil groups of the same phase are connected such that current flows through one in the direction of rotation and through the other one in a direction opposite to the direction of rotation.

Abstract: In an electric rotating machine, a stator has an armature coil wound around an armature core segments with M pairs of poles, and N pairs of field sources (field coil and field magnetic field), a rotor has K soft magnetic members including a plurality of protrusions on a side facing the stator, and the armature coil, the field sources, and the soft magnetic members satisfy a relational expression of |M±N|=K. With this configuration, rotors are rotated based on the magnetic modulation principle, so that field poles can have alternating electromagnetic action on the armature coil, and the performance of the electric rotating machine can be improved with a brushless structure.

Abstract: An electric motor, a compressor including the electric motor and a method for controlling the electric motor or the compressor are provided. The electric motor includes: a stator; single-phase or multiphase windings disposed on the stator; and a rotor, where the rotor includes a permanent magnet, and at least part of the permanent magnet is ferrite. By using a permanent magnet synchronous motor in a variable-speed compressor, costs of the variable-speed compressor are significantly reduced, and the performance thereof is basically the same as that of a variable-speed compressor using a rare-earth permanent magnet synchronous motor. By controlling the electric motor or the compressor, costs of the electric motor or the compressor are reduced, and moreover, and the ferrite in the electric motor can be protected from irreversible demagnetization at a low temperature, thereby improving the reliability of the compressor.

Abstract: The present invention provides a module dual radial gap brushless, permanent magnet AC or DC (BLPMAC/BLPMDC) rotary electrical motor/generator suitable for direct drive wind or other fluid medium driven turbines. The motor/generator includes a circular rotor ring of individual rotor segments and a circular stator ring of individual stator segments. Each rotor segment includes a plurality of magnet modules disposed therein and arranged in alternating magnetic plurality. The stator includes a plurality of stator induction modules nested within the rotating rotor. Each stator induction module includes a coil electrically connected to a phase bus bar and a common bus bar. In a first embodiment of the stator induction modules, the motor/generator has a pre-established, fixed gap between the magnets and the coils.

Abstract: The present disclosure relates to a twin laundry machine, more particularly, to a twin laundry machine configured to control mutual motor operations of one or more laundry machines provided therein not to be overlapped with each other, in case the one or more laundry machines are put into operation to perform washing. The present disclosure also relates to a twin laundry machine of which a motor for driving a drum has an improved heat radiation function, more particularly, to a twin laundry machine which includes a sub-washing machine with a smaller size than a normal washing machine and frequent exposure to high temperature usage environments.

Abstract: A part for uncoupling a motor and a motor mounting part thereof, that includes a rigid connecting part that is to be coaxially placed in a central portion of a stator core and includes a central ring for receiving a rotatable shaft of a rotor of the motor, from which at least two arms extend, free ends of which are intended to abut against an inner wall of the stator core and form at least two spaces for placing a flexible uncoupling pad that radially extends from an outer surface of the central ring of the rigid connecting part, against which the uncoupling pad abuts, to a rigid assembly tab that is to axially extend into the central portion of the stator core, near the inner wall of the stator core, while being rigidly connected to the motor mounting part.

Abstract: A lens moving apparatus can include a cover can; a base disposed below the cover can; a bobbin disposed in the cover can; a coil provided at an outer surface of the bobbin; a driving magnet facing the coil and disposed in the cover can; a sensing magnet coupled to the bobbin; and a sensing unit coupled to a circuit board and facing the sensing magnet, in which the bobbin includes a recess formed inward therein, the sensing magnet is disposed in the recess, and the coil is disposed between the sensing magnet and the cover can.

Abstract: In one possible embodiment, a magnet array for a motor is provided which has an array of permanent magnets being arranged such that flux from the permanent magnets reinforce on one side of the array and substantially cancel on an opposite side of the array, the array further includes flux concentrators located at poles on the reinforcing side of the array.

Abstract: An electric motor may have a rotor and a stator. An external part and an internal part may be arranged concentrically to a rotation axis and may be adjustable rotationally relative to each other about the rotation axis. The electric motor may be one of an external rotor motor and an internal rotor motor. The external part may have at least two permanent magnets. The internal part may have at least two pole arms and at least one electric coil. The rotor may be formed symmetrically and the stator may be formed asymmetrically.

Abstract: An outer rotor type dynamo has a first magnet and a second magnet which are disposed apart from each other in the axial direction, a first stator yoke disposed facing the inside of the first magnet with a gap, a second stator yoke disposed faced the inside of the second magnet with a gap, a hub shaft which magnetically connects the first stator yoke and the second stator yoke, a comb-like yoke in which both end portions of a plurality of projection pieces extending along the axial direction face different magnetic poles with respect to the first magnet and the second magnet, a bobbin disposed between the first stator yoke and the second stator yoke, and a coil wound around the bobbin.

Abstract: The invention provides a brushless motor. A stator 16 of the brushless motor has a stator core 17 provided with a plurality of salient poles 18 arranged in its a circumferential direction, and a winding wire 20 wound around the plurality of salient poles 18 through an insulator 19. A rotor 22 of the brushless motor has a tubular rotor yoke 23 arranged to surround the stator 16, an annular magnet for detent torque 25 arranged in an inner peripheral portion of the winding wire 20 on the stator core 17 and surrounding the shaft 15, and a magnetic member 27 coupled to an interior surface of a ceiling portion of the rotor yoke 23 to be opposed to the magnet for detent torque 25, and surrounding the shaft 15.

Abstract: A compact motor which avoids peeling and cracking of the circuit board wiring pattern upon bending the printed circuit board. A projecting part (13), projecting toward the bottom side of the bracket (5), is provided on the back surface (5c) of the bracket (5) of a compact motor. A board insertion groove (S) is formed between the projecting part (13) and the back surface (5c). The flexible printed circuit board (10), inserted inside the board insertion groove (S), abuts the projecting part (13) and is bent facing the back. When the printed circuit board (10) is inserted into the board insertion groove (S) and bent, the printed circuit board (10) is in a state abutting the curved part (13a) of the projecting part (13), so the curved part (13a) of the projecting part (13) regulates bending and, by doing this, stabilizes bending of the flexible printed circuit board (10).

Abstract: An electric machine includes a stator and a rotor, with the stator being equipped with at least one annular exciter unit that includes a coil and at least two annular yokes, with the rotor being equipped with a structure and at least one annular receiver unit. Each receiver unit includes at least two rows of magnets. Two sides of each yoke include teeth distributed angularly in a regular manner, and the teeth of the two adjacent yokes fit onto a face of the exciter unit, alternately forming north poles and south poles. Each row of the magnets is positioned opposite one face, forming an air gap with the exciter unit, with the electric machine thus including at least two air gaps, with a 3D magnetic flux thus circulating inside the said electric machine, dividing and regrouping itself in the vicinity of the magnets and of the yokes.

Abstract: An outer rotor construction for a wind turbine generator which outer rotor construction comprises a plurality of rotor housing segments, wherein a rotor housing segment is realized to hold a number of magnet poles, and wherein a rotor housing segment comprises a lateral connecting interface of a lateral connection for detachably connecting that rotor housing segment along its longitudinal length to a number of adjacent rotor housing segments. The invention further describes a wind turbine including a generator, which generator includes an inner stator and such an outer rotor is provided. A method of performing a maintenance procedure on such an outer rotor construction is also provided.

Abstract: A magnetic coupling, in particular a magnetic coupling pump, includes an inner rotor and an outer rotor which each carry magnets. Disposed between the inner and outer rotors is a double-wall containment shroud, which includes an outer shroud and an inner shroud. Each of the inner and outer shrouds includes a flange, a middle section and a bottom section, wherein a gap is disposed between the middle section and the bottom section. The inner shroud is connected by its flange to the flange of the outer shroud. The gap is filled at least in sections with a solid material.

Abstract: A motor of this invention comprises a rotor having a permanent magnet, the number of which magnet poles is P, and a stator including M pcs of teeth, the teeth arranged in a circumferential direction in a manner to face the permanent magnet through a spatial gap, wherein the stator includes stator core having the number M of the teeth, and a winding wire wound about each of the tooth, wherein the number P of the magnet poles and the number M of the teeth have a relation defined by formulae (2/3)M<P<(4/3)M, and M?P, and wherein ratio (t1/Ds) of teeth tip width t1 to stator inside diameter Ds is given by a formula 0.18<(t1/Ds)<0.25.

Abstract: A sensorless control method for a motor performed by a sensorless controller including a back electromotive force (EMF) observer and a phase locked loop (PLL) controller, includes: estimating a back EMF of the motor using the back EMF observer; calculating an electrical angle error in accordance with iron loss of the motor based on the estimated back EMF; and compensating for the calculated electrical angle error, inputting the compensated electrical angle error into the PLL controller to estimate an actual angle, and controlling the motor based on the estimated actual angle.

Abstract: In one possible embodiment, a magnet array for a motor is provided which has an array of permanent magnets being arranged such that flux from the permanent magnets reinforce on one side of the array and substantially cancel on an opposite side of the array, the array further includes flux concentrators located at poles on the reinforcing side of the array.

Abstract: A measuring body device is provided for a position/path measurement system, having at least one fixing band, with a first and a second end, to fix the measuring body device to an application. A measuring body in the form of a band is provided with at least one coding layer associated with the fixing band. At least one connecting mechanism fixes the first and second ends of the fixing band relative to one another. The connecting mechanism is a bridge element, fixed or fixable relative to the ends of the fixing band. At least one path storage device is arranged on the bridge element with a first transverse element, a second transverse element, spaced apart from the first transverse element, and a web element which connects the first and second transverse elements and which is integrally connected thereto. A spacing between the first and second transverse elements is determinably adjustable.

Abstract: The invention relates to a brushless direct-current motor (1), comprising a stator (2), a rotor cup (30) that revolves around the stator (2) and has a plurality of permanent-magnet poles (N, S), and a detent torque plate (4) that is connected to the stator (2) and has several pole shoes (41) for generating a detent torque that brings the revolving rotor cup (30) into a detent position. The pole shoes (41) are each arranged in the detent position between two adjacent poles (N, S) of the revolving rotor cup (30) to form a magnetic short circuit. The detent torque plate (4) is arranged substantially outside of the magnetic rotating field produced by the stator (2) during operation, whereby the production of the detent torque is decoupled from the electrical behavior of the brushless direct-current motor (1) and the power of the brushless direct-current motor (1) is not substantially influenced by the presence of the detent torque plate (4).

Abstract: The invention concerns a rotor (1) for an electric drive motor of a refrigerant compressor with a cylinder ring (2), several permanent magnets (14) resting on the radial inside of the cylinder ring (2), each permanent magnet (14) forming a ring section, and fixing elements (15) between the permanent magnets (14), said fixing elements (15) engaging a fixing geometry (4, 16) of the cylinder ring (2). It is endeavoured to simplify the manufacturing of such a rotor. For this purpose, the cylinder ring (2) is located in a carrier (5), which comprises a bottom (6) and a circumferential wall (7), the permanent magnets (14, 14a, 14b) resting on the bottom (6), and each fixing element (15, 15a, 15b) comprising at least one projection (17, 18), which covers a side (24) of the permanent magnet (14, 14a, 14b) facing away from the bottom (6).

Abstract: In a multi-gap electric rotating machine, a stator core has a radially outer portion, a radially inner portion and a connecting portion. The radially outer portion is located radially outside of a rotor core with a radially outer magnetic gap formed therebetween. The radially inner portion is located radially inside of the rotor core with a radially inner magnetic gap formed therebetween. The connecting portion radially extends to connect the radially outer and inner portions and is located on one axial side of the rotor core with an axial magnetic gap formed therebetween. A stator coil is formed of electric wires mounted on the stator core. Each of the electric wires has radially-outer in-slot portions, radially-inner in-slot portions and radially-intermediate in-slot portions, which are respectively received in slots of the radially outer portion, slots of the radially inner portion and slots of the connecting portion of the stator core.

Abstract: A spindle motor includes a flat stator, a rotor magnet arranged above the stator, and a magnetic portion made of a ferromagnetic material. The magnetic portion is positioned lower than the stator and the magnetic portion are axially overlapped with coils. A magnetic attraction force is generated between the magnetic portion and the rotor magnet. Since the magnetic portion is positioned lower than the stator, it is possible to cause magnetic fluxes to efficiently flow between the rotor magnet and the stator. Further, the stator includes a protrusion protruded radially outward beyond an outer circumferential portion of a rotor hub. Accordingly, in a plan view, the stator is positioned radially outward of the rotor hub.

Abstract: An electric motor (20) has a stator (30) and a rotor (26). The latter is equipped with a cup-like rotor part (56) and with a ring magnet (60) adhesively bonded therein, which magnet has an outer circumference (61) on which are provided elevations (84) and depressions (86) that extend at least partly in the longitudinal direction of the ring magnet (60). The outer circumference (61) of the ring magnet (60), that faces toward the cup-like rotor part (56) after assembly, is formed with at least one opening or channel (68; 69, 88), extending in a circumferential direction, that is connected to at least a plurality of the flat depressions (86). Positive mechanical engagement between adhesive and ring magnet enhances durability, and discourages any tendency toward relative rotation between the magnet (60) and the cup-like rotor part (56).

Abstract: A motor include a rotor to rotate a drum of the washing machine, and the rotor includes a base, a ring-shaped rib formed at the edge of the base, and a back yoke ring connected to the ring-shaped rib. The back yoke ring is inserted into the ring-shaped rib while the base is formed by injection molding.

Abstract: A method is disclosed for producing a mini-fan that includes a fan wheel equipped with fan blades (80) and, in order to drive said fan wheel (64), an electric drive motor (61). The latter has an internal stator (90) and an external rotor (62). The latter has a supporting part (64) made of plastic and connected to a shaft (60), which part is implemented integrally with the fan blades (80). The external rotor (62) furthermore has at least one permanent magnet (72; 72?) having hard ferromagnetic particles (74). The plastic supporting part (64) is connected by plastic injection molding to the shaft (60), and by two-component injection molding to a plastic in which the hard ferromagnetic particles (74) of the rotor permanent magnet (72; 72?) are arranged, so that at least a portion of the transition zone (76) between the supporting part (64) and rotor permanent magnet (72; 72?) is formed by a materially engaging connection. The pre-assembled external rotor (62), thus formed, is inserted into the mini-fan.

Abstract: A permanent magnet rotor for a brushless electric motor of the kind with an internal stator, has a carrier structure of molded plastic that includes a disc portion fixed to a shaft. The disc portion has a periphery joined to a substantially cylindrical cage portion coaxial with the shaft. The cage portion accommodates a magnetic flux conducting structure forming an wall which is coaxial with the shaft, and a plurality of permanent magnets shaped as ring segments, disposed at angular intervals within and adjacent to the flux conducting structure. Each magnet has its circumferentially terminal faces parallel with each other or converging in the outward direction. The cage portion is overmolded onto the flux conducting structure and has a plurality of angularly spaced struts which are essentially parallel to the axis of the rotor and which protrude radially inwards.

Abstract: An arrangement to compensate a non-uniform air gap, which is located in an electric machine is provided. The electrical machine includes a stator arrangement and a rotor arrangement. The rotor arrangement rotates around a longitudinal axis. At least parts of the rotor arrangement interact with parts of the stator arrangement to generate electrical power. The air gap is defined by the distance between the parts of the rotor arrangement and the parts of the stator arrangement. The parts of the stator arrangement are opposite to the parts of the rotor arrangement along a certain length. The cross section of the air gap changes along this length thus the air gap is not uniform in view to the referred certain length. The flux density of magnets, which are part of the rotor arrangement, is changed in dependency to the cross section of the air-gap.

Abstract: A rotor for an outer rotor-type motor is provided. The rotor includes a metallic coupler and a polymeric frame molded over at least part of the metallic coupler.

Abstract: A permanent magnet rotor for an brushless electric motor of the kind having an internal stator, has a supporting structure made of molded plastic that includes an essentially disc-shaped portion to which a shaft is centrally connected. The periphery of the disc is joined to an essentially cylindrical cage portion which extends coaxially around the shaft. A plurality of magnetically conductive yokes are disposed in the cage portion. The yokes are shaped as ring segments which as a whole form an essentially cylindrical wall. A plurality of ring segment permanent magnets are each disposed astride the junction of a pair of adjacent yokes. Each yoke has a dimension which increases from the circumferential ends thereof towards its circumferentially intermediate portion, such that the cross-sectional area of the yoke in a radial plane correspondingly increases from the ends thereof towards its intermediate portion.

Abstract: An overmolded-type rotor for an outer rotor-type electric motor, wherein, in addition to a backing ring and magnets, a metallic coupler that comprises an inner axial surface configured to interface with a shaft to be driven by the rotor and an outer axial surface that corresponds to a multiplicity of outer teeth is overmolded with a polymer frame.

Abstract: The present invention relates to a motor. A motor including a stator and a rotor that is rotatably provided at an outer side in a radial direction of the stator, the rotor comprising: a base part; a side wall part that is integrally formed with the base part and vertically extended with respect to the base part; and a permanent magnet that is provided at an inner side of the side wall part, wherein a spacing distance from an inner side surface of the base part to a lower end of the permanent magnet is formed to be larger than a radial thickness of the permanent magnet.

Abstract: A rotor (12) for an electric machine (10) includes a rotor disc (24) extending radially outwardly from a central axis (18) of the rotor (12) and a magnet retention band (30) including a plurality of magnet retention tabs (32). The magnet retention tabs (32) extend radially from the magnet retention band (30) and axially along a length of the magnet retention band (30). The magnet retention band (30) is secured to the rotor face (24) via a retention means and extends substantially axially therefrom. A plurality of permanent magnets (14), each permanent magnet (14) of the plurality of permanent magnets (14) are located at the magnet retention band (30) between adjacent magnet retention tabs (32) and are radially and circumferentially retained between the magnet retention tabs (32) and the magnet retention band (30).