Abstract: Exemplary embodiments relate to a hollow-cylindrical coreless winding for an electric motor. The winding includes a plurality of single coils which are distributed across the circumference of the winding, wherein each single coil includes a plurality of turns which are spirally wound around a winding axis which is perpendicular to an axis of the winding. Successive single coils overlap in a roof tile manner. The winding includes at least two phase windings, each of the phase windings consisting of several ones of the single coils. The phase windings are offset with respect to each other in the circumferential direction of the hollow-cylindrical winding, so that the single coils of a first phase winding are disposed in the circumferential direction of the hollow-cylindrical winding between the single coils of a second phase winding. Each of the phase windings is wound from a continuous wire.

Abstract: An electromagnetic drive mechanism (10) comprises a rotor (50) configured to rotate within a stator (30). The rotor (50) and stator (30) have multiple poles (56, 36), wherein each pole comprises a radial inner portion (564, 362) and a radial outer portion (562, 364). The radial inner portions (564, 362) and radial outer portions (562, 364) of the rotor (50) and stator (30) have different heights, forming a step (566, 366) between the radial inner and outer portions of the rotor (50) and stator (30). This configuration allows for overlapping radial surfaces in addition to overlapping axial surfaces during operation of the drive mechanism (10), thereby increasing the total overlap area and thus the reluctance torque, and potentially improving response speed while allowing for a more compact device (10).

Abstract: A superconductor-magnet bearing system can include a first bearing portion and a second bearing portion. One of the first and second bearing portions can be at least partially composed of a high-temperature superconductor (HTS) and another can be at least partially composed of a magnet. The first bearing portion can be disposed at least partially within an opening of the second bearing portion with a gap between the first and second portions. A magnetic bearing portion can include a plurality of rings disposed next to one another. An HTS bearing portion can include a magnet. The bearing portions can be biased toward an alignment with one another. One bearing portion can rotate relative to another bearing portion.

Abstract: Force control system. The system includes a first pair of permanent magnets for providing a normal force on the wheel of a robot adapted for n-pipe inspections. A second pair of magnets is provided with opposite polarity so that a rotor containing magnets may be rotated with a minimum of torque required and therefore with a minimum of energy expended.

Abstract: A pole shoe arrangement for a rotor or a stator of an electrical machine having an air gap between the stator and the rotor is disclosed. The pole shoe arrangement has a pole shoe element having an inner end and an outer end opposing the inner end. The inner end lies opposite the air gap when the pole shoe element is in an assembled state. The pole shoe element has a receiving surface for receiving a permanent magnet between the inner end and the outer end. The pole shoe arrangement has a guiding facility to guide the permanent magnet in a radial direction from the outer end to the inner end and to limit a movement of the permanent magnet at right angles to the radial direction.

Abstract: A generator system uses compressed air as a power source and utilizes an electromagnetic auxiliary power unit. The generator system includes an engine (1), a multiple-column power distributor (2), a generator system (4), a controller system (6), an intake speed control valve (23), a high pressure gas tank (13), a constant pressure tank (16), an electronic control unit ECO (29), an electromagnetic auxiliary power unit (1000), a power distributor (1100) and an end gas recycle loop. The end gas recycle loop includes an air compressor (7), a condenser (11), an end gas recycle tank (9), an electro-drive turbine unidirectional suction pump (19) and an end gas muffler (22).

Abstract: An electrical machine comprising: a first stator member (16) having a field magnet (22); a second stator member (18) forming an armature, the second stator member (18) being spaced from the first stator member (16); and a pair of contra-rotatable rotors (12a, 12b) disposed between the first and second stator members (16, 18); wherein at least a portion (14) of each of the rotors (12a, 12b) is magnetisable so as to transmit magnetic flux between the field magnet (22) and the armature.

Abstract: Electrical machine rotors and electrical machines are disclosed. The electrical machine rotors may include a shaft, a pair of permanent magnets arranged to form a magnetic pole on the rotor, a pole iron, and a pair of opposed inter-pole irons. The pole iron may retain the pair of magnets against the inter-pole irons and relative to the shaft. The electrical machine rotors may be assembled into electrical machines that include the rotor and a stator that includes a stator iron and at least one coil. In some examples, the shaft may be hollow, nonmagnetic, fiber-reinforced, and/or fabricated at least partially from a composite material.

Abstract: Teeth-shaped portions 11b of a magnet 11 are formed in such a way that a part of the plane of projection of each of the teeth-shaped portions protrudes in a circumferential direction with respect to that of one of teeth 8b and 9b which is viewed from an axial direction of a first stator core 8 and a second stator core 9.

Abstract: A magnetic component having intermixed first and second regions, and a method of preparing that magnetic component are disclosed. The first region includes a magnetic phase and the second region includes a non-magnetic phase. The method includes mechanically masking pre-selected sections of a surface portion of the component by using a nitrogen stop-off material and heat-treating the component in a nitrogen-rich atmosphere at a temperature greater than about 900° C. Both the first and second regions are substantially free of carbon, or contain only limited amounts of carbon; and the second region includes greater than about 0.1 weight % of nitrogen.

Abstract: A rotary electric machine includes a stator having an open slot configuration and a plurality of stator poles with a coil positioned about each stator pole. Each coil has a plurality of electrically conductive wires defining a group of wires and the group of wires is wrapped generally around a stator pole to define a plurality of turns. At least a portion of the group of wires is twisted, and the portion of the group of wires has between approximately 1 and 5 twists per turn. A method of fabricating a stator assembly is also disclosed.

Abstract: A spintronic generator that provides electrical power with the motive force of natural electron spin. The utilization of natural electron spin can be enhanced with carefully matched materials, weights, and magnetic waveforms which provide precise pulsed frequencies in resonance with the materials. This resonance of the magnetic pulses provides clean abundant power. A utilization of the Zero Point Energy results in a local environment temperature drop which can be one of the sources of motive force. The harvesting of electricity can be in standard induction pick up coils controlled by direct current motor controllers using an LRC tank circuit.

Abstract: This rotating electric machine has a rotor, stator core, field windings for multiple poles, and armature windings for the multiple poles. The rotor is rotatably supported about a shaft. Convex-shaped multiple salient pole sections are formed on the outer circumference of the rotor while arranged in the circumferential direction. The stator core is provided along the outer circumference of the rotor with an air gap from the rotor. Convex-shaped multiple teeth are formed on the inner circumference of the stator core while arranged in the circumferential direction. The field windings for the multiple poles are wound around each of the multiple teeth while insulated from the field windings.

Abstract: An improved hybrid drive apparatus with a switched reluctance hub motor. The switched reluctance motor eliminates any drag caused by the existing magnetic fields of the motors used in the prior art by turning off the magnetic fields when not being used. It also is cleaner and more efficient to operate, as any magnetic road dust or debris attracted during operation is dropped or repelled when the magnetic fields are turned off. An improved switched reluctance motor may be used, with a stator ring and rotor ring designed so that the low reluctance flux path does not pass through the full diameter of the rotor or rotor bars.

Abstract: The invention provides an active element for an electromagnetic machine, the element comprising an alternating succession in a main direction of portions presenting a first magnetic property and of portions presenting a second magnetic property, wherein the element includes a non-magnetic covering that is thin relative to a thickness of the portions and that extends to cover a substantial fraction of an outside surface of the active element, the covering being secured to at least some of the portions and presenting sufficient strength to form a member for mechanically transmitting the magnetic forces to which the portions are subjected.

Abstract: A motor rotor assembly that includes multiple motor rotor sections and a rotor bar that extends through the motor rotor sections, such that the rotor bar and the motor rotor sections are configured such that the rotor sections are step-skewed, or continuously skewed, from each other. The assembly may be used in an IPM or Synchronous Reluctance motor; and, the motor rotor sections may be of solid core or laminations. Various assembly components, IPM and Synchronous Reluctance motors, and methods of construction/assembly are also disclosed. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.

Abstract: A propulsion device for a marine vessel, the propulsion device comprising an electrical machine with integral magnetic gearing, which comprises three members, namely a first or inner rotor comprising a first plurality of permanent magnets, a second rotor in the form of a plurality of ferromagnetic pole pieces, and a stator which is associated with a plurality of 3-phase windings and to the periphery of which a plurality of second permanent magnets are fixed. The magnetic pole piece rotor is connected to a drive shaft provided with a propulsion means for providing propulsion to the marine vessel. The first or inner rotor is free to rotate about the drive shaft. The pole pieces of the second rotor are arranged to magnetically couple the permanent magnets of the first or inner rotor to the second permanent magnets on the stator.

Abstract: A reluctance rotor of a dynamoelectric rotary machine has an even number of poles constructed of a material having structural magnetic anisotropy. The magnetic anisotropy of the material is characterized by a first magnetic resistance, a magnetic permeability of ?r>20 and a saturation polarization of >1T in a first spatial direction, and by a second magnetic resistance which is greater than the first magnetic resistance with a magnetic permeability of ?r<1.6 in spatial directions perpendicular to the first spatial direction.

Abstract: An electrical machine comprising: a first component having a first surface; a second component having a second surface, the first and second components being mounted such that the first surface is constrained to be movable in a cyclical path relative to the second surface; and a coil arranged to induce a magnetic field in one of the surfaces so as to, in at least some configurations of the machine, form a magnetic circuit through that surface; the machine being configured so that: a) the first component and the second component can magnetically interact with each other by virtue of magnetic flux through the first and second surfaces; and b) during at least part of the cyclical path the reluctance of the magnetic circuit is changed by relative motion of the first and second surfaces, that change in reluctance being predominantly due to a component of relative motion of the first and second surfaces in a direction parallel to the shortest distance between the first and second surfaces.

Abstract: A rotating electrical machine has a rotor composed of laminations which are mounted on a shaft in an embodiment. The portion of the laminations adjacent the shaft has one or more slots, so designed as to increase the contact force between the lamination and the shaft as the speed of the rotor rises. This allows the laminations to be assembled to the shaft with a smaller interference fit yet retain a contact force at high speeds. The laminations may be assembled to the shaft with a suitable adhesive.

Abstract: A stator of a switched reluctance motor includes a stator core part, stator coiling parts, stator salient parts, and pairs of permanent magnets. The stator coiling parts protrude inwardly from the stator core part and have coils wound on an external side thereof. The stator salient parts protrude inwardly from the stator core part and are disposed between the stator coiling parts. Each pair of the permanent magnets is inserted into each of the stator coiling parts and magnetized in the same direction as a direction of a magnetic field generated by the excitation of the coils. This stator has an electromagnetic structure designed to prevent the reversal of a magnetic field generated by the excited coils. The output of the motor is enhanced by inserting the permanent magnets so as to be magnetized in the same direction as a direction of a magnetic field generated by the excited coils.

Abstract: The present disclosure relates to rotating electric machines which may be used for industrial applications, to a method for manufacturing a rotor of a synchronous reluctance motor, a rotor of a synchronous reluctance motor, and a synchronous reluctance motor. A rotor of a synchronous reluctance motor according to the present disclosure has a cylindrical rotor body part casted from a superparamagnetic material, and ferromagnetic flux guides arranged inside the casted cylindrical rotor body part. The flux guides are arranged to go through from one side of the outer circumference of the cylindrical rotor part to the other side of the outer circumference of the cylindrical rotor part in the direction of the direct axis of the synchronous reluctance motor.

Abstract: A rotor for an electrical machine, in particular synchronous reluctance machine, is provided. The rotor is formed as a cylindrical structure having a magnetically soft element formed with an even number of salient magnetic poles openings for forming magnetic flux barriers. The openings are at least partially filled with a diamagnetic and/or paramagnetic medium and the diamagnetic and/or paramagnetic medium may axially and tangentially fix the magnetically soft element relative to the rotor. A method for producing such a rotor and apparatus using the rotor, including a reluctance motor, in particular a synchronous reluctance motor, that uses the rotor are provided.

Abstract: A two-phase switched reluctance machine is provided using discontinuous core structures as the stator for low-cost, high-performance drives. This discontinuous stator core structure contains short flux paths and maximum overlap between the rotor poles and stator poles in the stator discontinuous core structures, regardless of the rotor position. Example configurations of such core structure include E-core, L-core and I-core configurations. Using less steel and magnet wire than in conventional SRM designs results in cost savings of stator material and winding material. Efficiency of this novel SRM is improved because of shorter flux paths resulting in reduction of core losses and decreased phase resistance resulting in reduction of copper losses. Two-phase simultaneous excitation of the novel SRM can reduce torque ripple during commutation as compared with existing two-phase SRMs.

Abstract: Disclosed herein is a switched reluctance motor comprising: a rotor having a shaft disposed at a central portion thereof and having salient poles formed at an outer circumference thereof; a stator having the rotor rotatably installed therein while forming a gap and having salient poles facing the salient poles of the rotor; and an extraction pressure decreasing unit separating the rotor and the stator from a mold, wherein the rotor and the stator are made of a soft magnet composite (SMC).

Abstract: A miniature electric motor (1) with an outer diameter (DA) that is smaller than or equal to 6 mm, has a hollow cylindrical stator (2) with stator coils (8) and a magnetic rotor (4) rotatably arranged around a rotational axis (16) in the stator (2) by means of a rotor shaft (10). The stator coils (8) can be energized in order to generate a magnetic rotational field in dependence upon the rotational position of the magnetic rotor (4). A sensor chip (20) having at least one magnetic field sensor (22) is arranged in such a manner in an area axially adjacent to a front face of the magnetic rotor (4) located within a plane that is vertical to the rotational axis (16) that the magnetic field sensor (22) is impinged in such a way by the magnetic field that the rotational position of the rotor can be evaluated.

Abstract: A variable electrical generator (20) is operable to convert mechanical motion to electrical power. The generator (20) includes at least a stator element (60) and a rotor element (50) including coils (320) and magnets (90). The generator (20) includes a configuration of modules (80) including the coils (320) for generating wavelets (30) in response to the coils (320) interacting magnetically with the magnets (90), and a control arrangement (70) for combining the wavelets (30) for generating a composite synthesized power output (10) from the generator (20). A method of maintaining a variable generator (20) includes steps of: (a) determining operating status of modules (80) of the generator (20); (b) unplugging and replacing one or more defective modules (80) as identified in step (a).

Abstract: An electromagnetic engine including a plurality of pistons and a plurality of corresponding electromagnets. The pistons are each connected to a crankshaft and fabricated of a ferrous material. The electromagnets are spaced from the pistons in alignment therewith. An electrical power source is provided to power the electromagnets, and a control assembly is provided to control the sequence of energizing the electromagnets, so that by energizing the electromagnets, the pistons will be pulled toward the electromagnets in response to a timely applied electromagnetic field. The force imparted on the piston is transmitted by the rod to the crankshaft, which provides power via an output shaft for desired uses.

Abstract: The present invention relates to an improved electric machine which, when operating in motor mode, produces rotational torque without using alternating magnetic polarity, but rather magnetic axial flux that utilizes coils arranged in a dipolar manner around an axial plane. In a preferred embodiment of the invention, the use of energy is significantly enhanced therein by injecting the energy harvested from the collapsing fields of electromagnetic drive components, and then directing said energy from said primary-drive coils of the machine into an isolated circuit which is thereafter introduced as a transient secondary process to power secondary-drive coils of the machine in order to increase the overall efficiency of the machine.

Abstract: A method of activating an electric machine having a stator, and a rotor which rotates about an axis with respect to the stator; the stator having a plurality of stator segments arranged about the axis; the rotor having modules made of magnetizable material and arranged about the axis; and the method including the steps of connecting the rotor to the stator by means of a bearing; and magnetizing the modules of magnetizable material when the rotor is connected to the stator.

Abstract: A power magnetic planetary gear set uses stator of a motor to provide electrically generated magnetic sections. The electrically generated magnetic sections are variable under the excitation control of coils and driver so that either the outer stator or the sun stator of the magnetic planetary gear set may be stationary and still provide self-revolutionary magnetic forces toward the planet gears disposed therebetween. The planet gears are also mounted on planet arms so as to revolve on their own axes and have orbital revolution with respect to the sun stator.

Abstract: Provided is a coercive-force specifying apparatus capable of creating a demagnetization curve for each divisional area of a coercive-force distributed magnet without breaking the coercive-force distributed magnet and of specifying an average coercive force for each divisional area precisely. A coercive force specifying apparatus of the present invention includes: a yoke including an insertion space into which a coercive-force distributed magnet is to be inserted; a magnetizing coil; a search coil that detects a magnetization change when the magnetic field is applied to the coercive-force distributed magnet; and a tracer that creates a demagnetization curve on a basis of a voltage value generated due to the magnetization change. The end face is provided with two or more loop-shaped thread grooves bored therein, the search coil being provided in each thread groove.

Abstract: A reluctance machine includes a stator having N stator poles and a rotor having N rotor poles. Each stator pole has a stator winding, and the windings of the N stator poles are configured for excitation in a single phase. The current flow in the windings is controlled to support a constrained flux path across two air gaps provided by circumferentially adjacent rotor/stator pole pairs. The rotor may further be structurally configured to support that constrained flux path and preclude diagonal flux across the rotor.

Abstract: The present invention relates to a magnetic actuation method according to which a magnetized mobile (4) is directed by means of at least one magnetic element (2, 2a, 2b) placed opposite said magnetized mobile, characterized in that the preferred direction (or easy axis) of magnetization is made to turn at every point of said element by applying at least one mechanical constraint to said magnetic element(s) (2, 2, 2b), causing anisotropy within said element and thus moving the magnetized mobile in a preferred linear direction or causing the same to rotate.

Abstract: A transverse flux induction motor (“TFIM”) is described in accordance with the present invention. The TFIM may be a linear induction motor or a rotary induction motor. The TFIM includes a primary motor element and secondary motor element. The primary motor element includes a plurality of coils and at least one magnetic element. The plurality of coils are arranged to generate a control flux along a first direction when power is applied to at least one coil of the plurality of coils and the at least one magnetic element is arranged to generate a bias flux in a second direction that is substantially transverse to the first direction. The secondary motor element is moveable in the first direction, relative to the primary motor element, in response to the control flux.

Abstract: The invention relates to an electric machine (101) comprising a stator (103), a rotatably mounted rotor (105) having a magnetizable and coolable rotor section (107) made of a super-conducting material (417), a control unit (109) designed to control a stator flow for inducing a magnetic flow through the superconducting material (417). The invention also relates to a method for operating an electric machine (101).

Abstract: Rotors assemblies usable in energy storage devices and power systems include a plurality of laminations oriented in vertical alignment, a first plate contacting a first side of the laminations, a second plate contacting a second side of the laminations, and at least one fastener engaged with the plates to compressively retain the laminations and limit relative movement of the laminations. Fasteners can engage the plates via an interference fit and pass through a clearance in the laminations sized to limit contact between the fasteners and the laminations during rotation of the rotor assembly. The laminations can be arranged with a thicker region of a first lamination above a thinner region of a second to form a stacked pair, and multiple stacked pairs can be rotationally offset from one another.

Abstract: Disclosed herein is a switched reluctance motor assembly, wherein a lower balancing part, which becomes a target to be cut for balancing, includes a lower balancing part body installed on a lower surface of a rotor part and an encoder protruding on a lower surface of the lower balancing part body. In the present invention, the encoder, which is a portion of a balancing part, becomes a target to be cut, thereby making it possible to more effectively perform balancing even with a smaller amount of cutting as compared with the prior art.

Abstract: A washing machine includes a water tub, an electric motor, and a control device. The motor comprises a stator including a stator coil, a rotor magnet arranged circumferentially with respect to the rotor, and a control device. The rotor magnet includes a permanent magnet. When the control device applies a first voltage to the stator coil in a wash step of the washing operation, the rotor magnet is magnetized so that a magnetic flux of the rotor magnet acting on the stator is increased without reversal of a direction of magnetization. When the control device applies a second voltage to the stator soil in a dehydration step of the washing operation, the rotor magnet is magnetized so that a magnetic flux of the rotor magnet acting on the stator is reduced without reversal of a direction of magnetization as compared with the magnetic flux in the wash step.

Abstract: The present invention is directed to the method of utilizing magnetic materials in permanent magnets and permanent magnet discs and surfaces, as a source of magnetic fields for producing rotational means, to produce a permanent magnet motor and utilizing this method to produce a powered means for use in remote pumping stations, geologic sensing stations both undersea and mountain top, remote electrical generating stations for inhabited areas of the planet off the power grid, power units for space stations, repair robots, planetary and lunar land rovers, astronomical research stations, electric generators, stabilization gyros and generators for autonomous robots, power units for motorized vehicles, and single person aircraft.

Abstract: Some embodiments of the disclosed invention provide a toroidal DC motor that reduces Back EMF and, therefore, minimizes the degradation of source potential. In addition, embodiments of the disclosed invention provide a motor that provides constant torque at constant current irrespective of the speed of the rotor. Likewise, some embodiments of the disclosed inventions provide output horsepower that increases with the rotational speed of the rotor.

Abstract: A wound field flux switching machine with a sinusoidal back electromotive force features a rotor with teeth and a stator with groups of teeth wherein each group has a field winding and each tooth has a phase winding.

Abstract: The present invention relates to an improved electric machine which, when operating in motor mode, produces rotational torque without using alternating magnetic polarity, but rather magnetic flux that utilizes coils arranged in a dipolar manner around an axial plane and independently removable stators.

Abstract: Various embodiments are described herein for a double-rotor switched reluctance machine. In one example embodiment, the double-rotor switched reluctance machine comprises an interior rotor, an exterior rotor spaced from the interior rotor and coaxially and concentrically disposed outside the interior rotor, and at least one stator disposed concentrically with the interior rotor and the exterior rotor. The interior rotor, the exterior rotor and the at least one stator are disposed within one machine set to provide an interior switched reluctance machine and an exterior switched reluctance machine. The interior switched reluctance machine and the exterior switched reluctance machine can operate as two motors, two generators, or a motor and a generator simultaneously.

Abstract: A multi-phase motor including a rotor and a stator including at least one core. The stator includes a plurality of phase sections. Each phase section is configured to provide a phase of the multi-phase motor. Each phase section includes at least one of the core(s), at least two ring magnets having polarity facing in a substantially same direction, and a winding between the at least two ring magnets. The winding is configured to be energized to direct flux through the at least one core at a first portion associated with a first one of the ring magnets, and to be differently energized to direct flux through the at least one core at a second portion associated with a second one of the ring magnets.

Abstract: A switched reluctance motor (SRM) with a rotor shaft defining a rotational axis, a rotor disc extending radially from the rotor shaft, the rotor disc has rotor poles spaced equally circumferentially. The SRM also has a stator arrangement with member stators spaced equally circumferentially and aligned in a common plane perpendicular to the rotational axis and axially spaced from the rotor disc for forming an axial air gap. Every second member stator of the plurality of member stators forms a respective group, so that each member stator of a first group is surrounded by two members of a second group on each side. The stator coils in the first group are connected to a half-wave rectifier arrangement in a forward direction and the stator coils in the second group are connected to the half-wave rectifier arrangement in the reverse direction.

Abstract: Homopolar electric machine, characterized in that its structure is double, its rotor and its stator being simultaneously homopolar, and in that it includes a stack of pairs of simple homopolar stators, forming monophasing elementary machines, or in a reverse version, the elementary machines being powered with AC current; the rotor is common to all these stators, and is passive, that is to say composed completely or partially of ferromagnetic materials.

Abstract: A motor-generator utilizes a multi-part rotor encircling a stator, the rotor including a plurality of rotor segments.

Abstract: A substrate transport apparatus including a drive section and a first movable arm assembly. The drive section includes a first motor. The first motor includes a stator and a passive rotor. The first movable arm assembly is connected to the first motor. The substrate transport apparatus is configured for the first movable arm assembly to be positionable in a vacuum chamber with the passive rotor being in communication with an environment inside the vacuum chamber.

Abstract: Advantageous machines, such as flux-switching machines (FSMs) are provided. An FSM can be yokeless and can have two rotors, which can be displaced from one another (e.g., by half a pole pitch). An FSM can be a flux-switching permanent magnet machine (FSPMM), and all magnets can be magnetized in the same circumferential direction. FSMs of the subject invention are cost-effective, have high torque density, and can operate well even under fault conditions.