Abstract: An aftermarket hybrid conversion system enables retrofitting existing combustion engine vehicles with electric assist capabilities. The system includes a variable speed electric motor with regenerative braking, coupled to the vehicle's drive shaft through a power input gearbox and torque converter. An energy storage system combines lithium polymer batteries and supercapacitors in parallel configuration, charged through regenerative braking and the vehicle's alternator. Steering wheel-mounted paddle shifters provide user control, with the left paddle engaging regenerative braking and the right paddle controlling electric assist power. An electrical controller manages power flow, implements safety protocols, and synchronizes motor operation. The system provides supplemental torque equivalent to the original engine's output while capturing otherwise wasted braking energy.

Abstract: The present disclosure comprises an inner rotor and an outer rotor, a stator disposed between the inner rotor and the outer rotor, and a variable stator core provided to control a magnetic path between inside and outside of the stator.

Abstract: An axial field rotary energy device can include a housing and a rotor coupled to the housing. The rotor can include an axis of rotation and a rotor disk having a magnet. The device can include a stator that is coaxial with the rotor. The stator can include a printed circuit board having conductive layers laminated together with layers of an insulating material. Each conductive layer has coils that can carry electrical current when connected to an external voltage source. The stator is mechanically coupled to the housing, so the stator reacts to torque produced by the device. A ferromagnetic yoke is coaxial with the rotor and stator. The ferromagnetic yoke can be mechanically and thermally coupled to the stator and the housing to provide a path for magnetic flux produced by the magnet and a path to conduct heat generated by the stator from the stator to the housing.

Abstract: A hub assembly for use in a compressed air driven inverter generator is provided. The hub assembly comprises: a hub comprising a plate with a cylindrical protrusion centered on a bottom face and a bore hole through the center of the plate and protrusion, the protrusion sized to fit into an inner bore hole of a stator and the bore hole of the hub sized to fit around without contacting an output shaft of an air motor of the generator, the plate also a trench on a bottom face and a plurality of mounting holes; a diffuser plate configured to attach to the bottom face of the hub with a plurality of air holes extending through the diffuser plate, the air holes being centered on the trench; a ring-shaped hub spacer in contact with a side of the diffuser plate opposite the hub.

Abstract: Electrical power systems for distributing electrical power in arrangements including one or more gas turbine engines; one such system includes: one or more rotary electric machines coupled to a gas turbine engine spool; a set of converter circuits connected to the rotary electric machines converting between alternating current (ac) and direct current (dc), wherein the rotary electric machines and the converter circuits output a number R?2 of dc power channels, each channel having an index r=(1, . . . , R); and a group of N dc load channels connected to the R dc power channels by a switching arrangement, wherein N>R and each dc load channel has an index n=(1, . . . , N). For each respective N load channels, a current limiting device (CLD) limits the current flowing from power channels to a load connectable to the electrical power system via the respective load channel.

Abstract: An electric drive system including: a rotary motor system including a hub assembly, a first rotating assembly, a second rotating assembly, and a third rotating assembly, wherein the hub assembly defines a rotational axis about which the first rotating assembly, the second rotating assembly, and the third rotating assembly are coaxially aligned and are capable of independent rotational movement independent of each other; a multi-bar linkage mechanism connected to each of the first and third rotating assemblies and connected to the hub assembly and constraining movement of the hub assembly so that the rotational axis of the hub assembly moves along a defined path that is in a transverse direction relative to the rotational axis and wherein the multi-bar linkage mechanism causes the rotational axis of the hub assembly to translate along the defined path in response to relative rotation of the first rotating assembly and the third rotating assembly with respect to each other.

Abstract: An electric motor with multiple electric gears to achieve an effect equivalent to mechanical gears in transmissions, enabling more efficient use of electricity at a wider range of speeds and torques is described. The Gears for Electric Motor (GEM) comprises a multi-phase motor having a concentric set of dedicated rotors to specific ranges of revolutions per minute (RPMs), and corresponding stators. The rotors and stators may be fitted within each other or positioned approximately parallel to each other along the longitudinal axis of the motor shaft. A controller determines which rotors are activated based on desired efficiency, torque and speed. Alternately, or in addition, magnets and coil pairs are constructed with varying properties to make more efficient use of electricity at a wider range of speeds and torques.

Abstract: A system and method for a lever that is formed by a rod gripped with a three dimensional log spiral structure that applies alternating downward rotational force at two points along the rod, producing rhythmic applications of leverage around its fulcrum. As one end of the spiral rotates down with application of force, the other is rotated up via segmental action of the components of the log spiral component and positioned for a subsequent downstroke.

Abstract: Methods for controlling an electrical power supply network for an aircraft, include pre-charging at least one capacitor in a normal operating mode when a gas turbine is available, pre-charging the at least one capacitor in a backup operating mode when the gas turbine is not available, and discharging the at least one capacitor at the end of use of the electrical power supply network when the at least one capacitor is charged.

Abstract: An electric-motor system includes a forward electric-motor assembly, a rear electric-motor assembly arranged in series relative to the forward electric-motor assembly, a forward electric-motor driveshaft splined to the forward electric-motor assembly and comprising a forward electric-motor drive-shaft shear section, and a rear electric-motor driveshaft splined to the rear electric-motor assembly and comprising a rear electric-motor drive-shaft shear section, at least a portion of the rear electric-motor driveshaft arranged concentrically within the forward electric-motor driveshaft. The forward electric-motor driveshaft and the rear electric-motor driveshaft rotate about a common axis.

Abstract: An electric machine system described herein comprises a first electric machine rotor, a first gear and a second gear. The first gear is connected to the first electric machine rotor and to a first input/output shaft. The second gear is connected to the first electric machine rotor and to a second input/output shaft. The first electric machine rotor is disposed between the first gear and the second gear.

Abstract: Enhanced composite lightweight coiled windings are discussed which utilize phenolic, non-ferrous and ferrous metals in combination with improved geometrical shapes to create lightweight and highly efficient composite material winding assemblies for use in generators. These generators exhibit improved thermal and energy efficiencies when compared to present day generators. In some embodiments, the ends of these permanent magnets are in contact with intermediate T-shaped ferrous magnetically permeable members as described.

Abstract: An electro-hydraulic linear lead screw actuator preferably includes an electric motor device, a hydraulic tube, an actuator lead screw, an actuator screw nut, an actuator rod and at least one external hydraulic flow passage. The actuator lead screw is rotated by the electric motor device. The actuator screw nut preferably includes a piston portion, a first screw nut portion and a second screw nut portion. A lead screw thread is formed through the first and second screw nut portions to threadably receive the actuator lead screw. The actuator rod is retained on the piston portion. Rotation of the electric motor device causes the actuator rod to extend or retract. A first hydraulic chamber is located behind the piston portion and a second hydraulic chamber is located in front of the piston portion. At least one external hydraulic flow passage transfers hydraulic fluid between the first and second chambers.

Abstract: A hydraulic-electric coupling driven multi-actuator system and control method are provided. The system comprises one or more hydraulic-electric hybrid driven actuators, first inverters, control valves, centralized hydraulic units and control units, wherein each hydraulic-electric hybrid driven actuator is correspondingly connected with one first inverter and one control valve; the centralized hydraulic units are connected with the control valves and configured to supply oil for the hydraulic-electric hybrid driven actuators and to perform power compensation; and the control units are respectively connected with the hydraulic-electric hybrid driven actuators, and each control unit is configured to control output torque of a first motor of the corresponding hydraulic-electric hybrid driven actuator based on pressure information of the hydraulic-electric hybrid driven actuator, such that pressure of driving cavities of the hydraulic-electric hybrid driven actuators is equal.

Abstract: An axial flux induction machine including at least two stator and one rotor where the stators include an inner and outer ring of coils. The stator includes at least two mirrored structure constructed such as to secure wire coils, amplify magnetic characteristics, and provide a structure upon which to secure a rotary shaft or through which a rotary shaft may be run. The structures supporting either the outer or inner ring of coils can be in contact between the two stators and the outer ring can be spaced further from the rotary shaft than the inner ring of coils and also further from the rotary shaft than an outer edge of the rotor.

Abstract: A stator assembly for a planar electrical motor includes coil conductors arranged in a stator layer, elongated in a first direction and arranged side by side in a second direction perpendicular to the first direction. The coil conductors are connected to form a three-phase system, with a first forward conductor and first return conductor of the first phase connected in series to the first forward conductor, a second forward conductor and second return conductor of the second phase connected in series with the second forward conductor, and a third forward conductor and third return conductor of the third phase connected in series with the third forward conductor. The three-phase system has first and second opposite sides. The first forward conductor and the first return conductor are electroconductively connected in series by first and second horizontal connecting conductors arranged in the stator layer on the second and first side, respectively.

Abstract: A motor assembly is described and includes a housing having a forward endplate and a rear endplate; a plurality of motors disposed within the housing; and a drive shaft driven by the plurality of motors and having a first end extending through the forward endplate of the housing and a second end extending through the rear endplate of the housing, wherein the first end of the drive shaft is configured to engage with a gearbox.

Abstract: A gripper includes at least one movable finger. Each movable finger includes a first motor, a second motor, a first motor link having a first end coupled to a rotor of the first motor, a second motor link having a first end coupled to a rotor of the second motor, a finger link having a first end in pivotal connection with a second end of the second motor link and a gripper pad, and a connecting link having a first end in pivotal connection with a second end of the first motor link and a second end in pivotal connection with the finger link. The gripper further includes at least one controller programmed or configured to actuate the first motor and the second motor of each of the at least one movable finger.

Abstract: A rotor (1) of an axial-flux electromagnetic machine having a body comprising an internal hub (2) concentric to the axis of rotation (7). Branches (3) extend radially in relation to the axis of rotation (7) from the internal hub (2) toward a binding band (8) which forms an external circular rim of the rotor (1). In each space defined between two adjacent branches (3) there is a magnet structure (10) comprising a plurality of magnets (4). The body is constituted by a plurality of stacked layers of composite containing fibers bonded by a resin. The fibers of each layer are oriented in a different predetermined direction (F1, F2) for two adjacent and stacked layers. In addition, a covering skin is located on each of two opposite faces of the rotor body, made up of a plurality of stacked layers of composite containing fibers bonded by a resin.

Abstract: The invention relates to a rotor (1) of an electromagnetic motor or generator having a body comprising an inner hub (2) which is concentric to a central axis (7) of rotation of the rotor (1), branches (3) extending radially with respect to the central axis (7) of rotation from the inner hub (2) towards a hoop (8) forming a circular outer periphery of the rotor (1), at least one magnet (10) being housed in each space delimited between two adjacent branches (3), each having a width which decreases with distance from the inner hub (2) and terminates by a tapered tip (3b) against the hoop (8). Each magnet is in the form of a magnet structure (10) consisting of a plurality of individual magnets (4) which are secured together by a fiber-reinforced insulating material, each individual magnet (4) being elongated in shape by extending in the axial direction of the rotor (1).

Abstract: An electro-hydraulic linear ball screw actuator preferably includes an electric motor, a hydraulic tube, an actuator ball screw, a ball nut device, an actuator rod and at least one external hydraulic flow passage. The actuator ball screw is rotated by the electric motor. The ball nut device includes a ball nut base, a piston portion and a rod thread. The ball nut device is retained in the hydraulic tube. The ball nut base includes a plurality of ball bearings, which engage ball threads on the actuator ball screw. The actuator rod is retained on the piston portion. Rotation of the electric motor causes the actuator rod to extend or retract. A first hydraulic chamber is located behind the piston portion and a second hydraulic chamber is located in front of the piston portion. The at least one external hydraulic flow passage transfers hydraulic fluid between the first and second chambers.

Abstract: An electric motor includes a rotor and a stator. The stator includes a first stator core located on a first side in the axial direction, and a second stator core located on a second side. The minimum distance from a rotor core of the rotor to the first stator core in the radial direction is smaller than the minimum distance from the rotor core to the second stator core in the radial direction. Each tooth of the first stator core includes a tooth end portion. The tooth end portion includes a main body extending in the radial direction, and a first portion extending in the circumferential direction, and a second portion projecting from the first portion in the radial direction.

Abstract: An actuator assembly comprising an output member rotatable about a center axis relative to a structure, a first actuator having a first stator fixed to the structure and a first rotor rotatable about the center axis relative to the first stator, a second actuator having a second stator coupled to the first rotor such that the second stator rotates about the center axis relative to the first stator with rotation of the first rotor about the center axis and having a second rotor rotationally coupled to the output member, a controller configured in a failure mode to drive one of the first actuator or the second actuator to selectively control the rotation of the output member about the center axis with an operational failure of the other of the first actuator or the second actuator.

Abstract: An electrical submersible well pump assembly has first and second permanent magnet motors. The first motor drive shaft is connected to a coupling that has internal splines for receiving an externally splined end of the second motor drive shaft. Alignment devices rotationally align magnetic poles of the first drive shaft with the magnetic poles of the second drive shaft prior to securing the housings of the first and second motors together. The alignment devices may be a coupling irregularity in the internal splines that is at a controlled orientation relative to the magnetic poles of the first shaft and a shaft irregularity in the external splines that prevents the second drive shaft from fully engaging the coupling unless the shaft irregularity is in a specified rotational position relative to the coupling irregularity.

Abstract: An electric drive unit and method of assembling the same is disclosed. The electric drive unit includes a rotor having a rotor shaft, and gear shaft, where the rotor shaft is inserted into the gear shaft. The gear shaft is supported by two bearings, while the rotor shaft supported directly at one end by a bearing and at the other by the gear shaft. A wave spring is also disclosed that provides an axial loading to the rotor shaft. Also disclosed is a balancing ring secured to an end of the rotor via a locknut. The balancing ring can be machined in order to balance the rotor. The rotor shaft can be connected to the gear shaft via a spline connection. The rotor shaft can bear against the gear shaft via a pilot journal and pilot bore defined on the rotor shaft and gear shaft respectively.

Abstract: An electrical submersible well pump (ESP) has a motor electrical connector mounted to an exterior of the motor. A motor sensor connects to an interior side of the motor electrical connector. Seal first and second electrical connectors mount to an exterior of a seal/motor adapter. A seal internal wire within the seal section electrically connects interior sides of the seal first and second electrical connectors together. An external motor jumper wire extends alongside the motor between the motor electrical connector and the seal first electrical connector. A pump electrical connector mounts to an exterior of a pump/seal adapter and connects to a pump sensor within the pump. An external seal jumper wire connects between the seal second electrical connector and the pump electrical connector.

Abstract: A home appliance including a dryer to discharge drying air and a stand is provided. The dryer includes a casing, a fan located in the casing, a heater located in the casing, a grip connected to the casing, and a dryer positioner located at the grip. The stand includes a receptacle to detachably mount an end of the grip of the dryer and a stand positioner located at the receptacle, the stand positioner cooperating with the dryer positioner when the grip is mounted in the receptacle to align the grip in a predetermined position. At least one of a magnetic force or a physical contact occurs between the dryer positioner and the stand positioner.

Abstract: An electrical machine stator can include a stator core having a stator core shape and made of a core material, a plurality of windings disposed in the stator core and made of a conductive material, and an insulative material surrounding the plurality of windings and configured to electrically insulate each winding from each other adjacent winding, and/or to insulate one or more of the windings from the stator core. The insulative material can be an amorphous metal.

Abstract: A motor comprising: (a) a stator having a plurality of ferrous cores surrounded by a plurality of windings; (b) a pair of rotors positioned on opposing sides of the stator, each rotor including a ring gear; and (c) a drive shaft extending through a cutout of the stator, the drive shaft having a pinion gear positioned near an end of the drive shaft in communication with the ring gears of the rotors; wherein the rotors rotate in opposing directions so that the ring gears translate a movement of the rotors to the drive shaft through the pinion gear to rotate the drive shaft in a direction substantially orthogonal to a direction of rotation of the rotors.

Abstract: A motor includes a rotor and a stator. The stator is formed by laminating a plurality of magnetic thin strips each having a plurality of teeth parts. The magnetic thin strip includes an elliptical-shaped inner diameter part formed along tip end portions of the plural teeth parts. At least one magnetic thin strip in the laminated magnetic thin strips is shifted by a given angle with respect to other magnetic thin strips in a horizontal direction, and positions of all teeth parts of the laminated magnetic thin strips correspond to one another to reduce cogging torque.

Abstract: Systems and methods for connecting rotors between multiple permanent magnet motors. By coupling the rotors of multiple modules, torque may be transferred while maintaining the angular alignment between the stator and rotor magnetic fields of each individual permanent magnet motor.

Abstract: This application provides a motor cooling system of an electric vehicle. In the cooling system, a coil cooling oil passage includes a first oil outlet that is at an end portion of a stator core. A core cooling oil passage and the coil cooling oil passage are sequentially connected. In this case, cooling oil first enters the core cooling oil passage, and then enters the coil cooling oil passage. The core cooling oil passage extends in a circumferential direction of the stator core. The coil cooling oil passage extends in an axial direction of the stator core. A power apparatus drives the cooling oil to enter the core cooling oil passage from an oil inlet, flow through the core cooling oil passage, and enters the coil cooling oil passage from an oil through port. The cooling oil flows back to an oil return groove from the first oil outlet.

Abstract: There is disclosed a power generation assembly (300) for powering a transport refrigeration system (TRS) (52) of a vehicle (10), the power generation assembly (300) comprising: a torque converter (402) having an engine side input (404) and a transmission side output (406); a power take-off device (302) coupled to the engine side input (404) of the torque converter (402), the power take-off device (302) having a rotary output; a permanent magnet generator (304) having a rotor (420) directly coupled to the power take-off device (302) for power generation; wherein the power generation assembly (300) is configured to be housed in an engine bay (210) of a vehicle (10), and is configured to generate at least 8 kW of power when the engine side input (404) has a rotational speed of 500 rpm.

Abstract: The invention predominantly relates to a rotating electrical machine for a motor vehicle, comprising: a rotor having an even number of pole pairs Np; and a stator (10) comprising a body provided with slots and a three-phase winding (14) inserted into the slots in the stator body. The three-phase winding (14) comprises: at least a first group (G1) of portions of phases (U, V, W) and a second group (G2) of portions of phases (U, V, W) which are associated with a first set of at least three bridge arms (21.1); and at least a third group (G3) of portions of phases (U, V, W) and a fourth group (G4) of portions of phases (U, V, W) which are associated with a second set of at least three bridge arms (21.1).

Abstract: An exciter includes a first yoke having a first accommodation space with a first open end, a second yoke having a second accommodation space with a second open end which faces the first open end, the second open end being spaced from the first open end in a vibration direction. The exciter further includes a first magnetic member accommodated in the first accommodation space, a magnetic core and a coil accommodated in the second accommodation space, the coil wound around the magnetic core, a second magnetic member accommodated in the second accommodation space and located at outside of the coil, and a copper tube wound around the magnetic core and sandwiched between the magnetic core and the coil. The copper tube is capable of suppressing the high frequency impedance of the coil and therefore improves the high frequency performance and the reliability of the exciter.

Abstract: A generator for a wind turbine comprising a generator stator having a mounting portion for fixing the generator stator to a machine carrier of the wind turbine, and a generator rotor mounted rotatably about a generator axis relative to the generator stator. The generator has a single-stage transmission which is adapted to non-rotatably cooperate at the drive side with a rotor blade hub and which is non-rotatably connected at the output side to the generator rotor.

Abstract: An electric rotating machine according to an embodiment includes a stator, and a rotor that is rotatable about a rotational center. The stator includes a winding having an annular shape with the rotational center, a first core, and a second core. The first core surrounds a part of the winding, and has a pole face to which a magnetic flux is input in a first direction, and a pole face from which the magnetic flux is output in the first direction. The second core surrounds a part of the winding, and has a pole face to which a magnetic flux is input in a second direction, and a pole face from which the magnetic flux is output in the second direction. The rotor is positioned spaced from the first core and the second core, and is rotatable about the rotational center, relatively with respect to the stator.

Abstract: A bi-polar hybrid stepper motor includes a stator having a primary winding. The stator and the primary winding are positioned within a housing. A rotor has a magnetic component. The rotor is rotationally operable relative to the stator. An axial coil assembly is positioned within the housing and located proximate ends of the rotor and having a secondary winding. At least a portion of the magnetic component of the rotor is produced by the axial coil assembly in an energized state. The energized state produces an electromagnetic communication between the rotor and the stator.

Abstract: A system to reduce eddy currents and the resulting losses in a synchronous motor includes at least one pick-up coil mounted to the rotor. Each pick-up coil may be located proximate a pole on the rotor. A voltage applied to the stator to control the synchronous motor includes both a fundamental component and harmonic components. The fundamental component interacts with a magnetically salient structure in each pole on the rotor to cause rotation of the rotor. The harmonic components induce a voltage in the pick-up coil. The portion of the harmonic components that induce a voltage in the pick-up coil no longer generate eddy currents within the motor. The energy harvested by the pick-up coil may also be utilized in a function other than driving the motor, such as powering a sensor mounted on the rotor.

Abstract: An engine including an engine block having a cylinder defining a front of the engine, a blower housing coupled to the engine block and defining a hot half and a cool half opposite the front half, a starter mount assembly coupled to the blower housing and positioned within the cool half, an electric starter motor retained by the starter mount assembly, and a battery mounted to the blower housing and positioned in the cool half. The battery is electrically coupled to the electric starter motor.

Abstract: A set of parts for a radial fan has a fan wheel (2), a main housing part (1), and a complementary housing part (3). They can be assembled to form a first housing that encloses the fan wheel (2). The housing has an inlet opening (27) and an outlet (23). At least one second complementary fan wheels (2?, 2?) (3?, 3?), the shape of which differs from the first fan wheel part (2), can be connected to the motor instead of the fan wheel (2).

Abstract: An electromagnetic machine includes a housing, an axle coupled to the housing in a rotatable fashion, a stator assembly disposed generally within the housing, the stator assembly including a stator plate and a stator bearing coupled to the axle such that the stator assembly is rotatable about the axle, a rotor assembly fixed to the axle and disposed generally within the housing and including a rotor housing that defines a circumferentially extending channel that is sized to receive a portion of the stator assembly therein; and a locking mechanism configured to selectively prevent and permit rotation of the stator assembly about the axle via the stator bearing. The housing can include an access window defined therein such that the stator assembly is accessible through the access window.

Abstract: A human motion energy harvesting apparatus embeddable in a wearable electronic device is provided. The apparatus may include a base; a first rotor disposed in a ring shape and connected to the base, the first rotor being rotatable circumferentially relative to the base, wherein a plurality of pairs of first permanent magnets may be disposed on a surface of the first rotor; an oscillating weight fixed coaxially with the first rotor; a second rotor disposed in a ring shape and coaxially connected to the base with the first rotor, the second rotor being rotatable circumferentially relative to the base, wherein a plurality of pairs of second permanent magnets may be disposed on a surface of the second rotor; a modulation ring fixed to the base coaxially with the first rotor between the first rotor and the second rotor; and a stator fixed to the base coaxially with the first rotor on a side of the second rotor opposite the first rotor, wherein a coil is arranged on the stator.

Abstract: An electric drive comprises a bearingless electric machine, a converter, and a control device. The stator of the electric machine has a cage winding including bars connected to a conductor ring. The control device controls the converter to supply torque generating current components to the bars so that torque is generated in accordance with electric machine control and to supply levitation current components to the bars so that the rotor of the bearingless electric machine is levitated in accordance with levitation control. The cage winding allows the currents of the bars to be controlled so that different current sheet distributions can be generated so as to generate desired torque and magnetic force.

Abstract: A bearingless motor is provided. The bearingless motor primarily includes a rotor module and a stator. The rotor module includes a plurality of rotor elements, and the stator includes a housing that forms a receiving space for receiving the rotor module, wherein the rotor module is rotatable relative to the stator.

Abstract: Disclosed are various embodiments for a new and improved electric motor/generator including a toroidal magnetic cylinder centered on the longitudinal axis, and a coil assembly including a first coil assembly support positioned within the toroidal magnetic cylinder, and a second coil assembly support positioned within the toroidal magnetic cylinder.

Abstract: An electric machine assembly having a main machine stator core having at least one stator post, a set of stator windings wound about the at least one stator post and having a first end and an opposing second end, a coolant inlet housing defining an inlet passage, a coolant outlet housing defining an outlet passage, proximate to the coolant inlet housing, and wherein the coolant inlet passage and the coolant outlet passage define a coolant circuit configured to receive a supply of coolant to remove heat generated in the set of stator windings.

Abstract: An axial flux machine (AFM) includes a rotor rotatably disposed between a pair of fixed stators. The rotor and the stators are formed of tape-wound laminated cores of ferromagnetic material. In addition, the rotor includes multiple layers of angled magnets that circumscribe the rotor. Such configuration enables the axial flux machine to achieve a high airgap flux density while achieving a high saliency ratio and lowered cogging torque as compared to current generation AFMs.

Abstract: An electrical submersible well pump assembly has first and second permanent magnet motors. The first motor drive shaft is connected to a coupling that has internal splines for receiving an externally splined end of the second motor drive shaft. Alignment devices rotationally align magnetic poles of the first drive shaft with the magnetic poles of the second drive shaft prior to securing the housings of the first and second motors together. The alignment devices may be a coupling irregularity in the internal splines that is at a controlled orientation relative to the magnetic poles of the first shaft and a shaft irregularity in the external splines that prevents the second drive shaft from fully engaging the coupling unless the shaft irregularity is in a specified rotational position relative to the coupling irregularity.

Abstract: An electrical machine includes a stator containing bearing plates and windings conducting electrical current and the rotor. The stator has windings conducting electric current embedded in a composite material and shaped into winding segments forming a ring segment of an angular span constituting a part of the full angle. The segments are inserted between the external and internal discs of the rotor. The magnetic poles are embedded and magnetised towards the axial direction of internal discs. The poles are separated from each other with a spacing made of a non-magnetic composite material of the internal and external discs structure. Each external and internal disc has an external reinforcing ring, made of a non-magnetic composite material reinforced with fibres of strength exceeding 1 GPa, formed by winding the fibres together with resin on the cylindrical surface of the discs. The external discs have a ring closing the magnetic circuit.