Abstract: A motor includes a stator core having an annular shape about an axis, a coil wound on the stator core, and a rotor core disposed on an inner side of the stator core in a radial direction about the axis. The rotor core has a stacked body in which a plurality of steel laminations are stacked in a direction of the axis, and a magnet insertion hole famed in the stacked body. The rotor core has a length in the direction of the axis longer than that of the stator core. A magnet is inserted in the magnet insertion hole. The rotor core has a first region where the magnet is inserted in the magnet insertion hole and a second region where the magnet is not inserted in the magnet insertion hole, in the direction of the axis. At least one steel lamination in the second region of the rotor core has an opening area smaller than an opening area of each steel lamination in the first region of the rotor core.

Abstract: A rotor includes a rotor core. The rotor core has an outer shape including a first arc portion provided so as to intersect a d-axis, a straight line portion provided so as to intersect a q-axis, and a curved portion that connects the first arc portion and the straight line portion. The first arc portion has an arc shape centered on an axial center of the rotor core. The curved portion includes an arc-shaped second arc portion that bulges outward in a radial direction of the rotor core. The radius of curvature of the second arc portion being smaller than a radius of curvature of the first arc portion.

Abstract: A rotor sheet includes a sheet body. The sheet body includes a plurality of magnetic poles symmetrically distributed in a circumferential direction of the sheet body. Each magnetic pole includes one first magnet groove symmetrical about a D-axis center line, two second magnet grooves symmetrically distributed in an approximate V shape about the D-axis center line, two first air grooves symmetrically distributed on the outer sides of two ends of the first magnet groove, and one second air groove positioned between the ends of the two second magnet grooves near the side of the center of the sheet body. First magnetic bridges are formed between the first air grooves and an excircle of the sheet body, and second magnetic bridges are formed between the first magnet groove and the first air grooves; and third magnetic bridges are formed between the excircle of the sheet body.

Abstract: A process for assembling a rotor of a variable-reluctance synchronous motor, characterised in that it comprises the steps of: i. preparing a plurality of discs having a through-cavity for each polar sector for housing at least a magnet; ii. positioning the discs in sequence along an axis of rotation for forming the rotor, so that the through-cavities are aligned to one another; iii. preparing magnets having an identical depth that is smaller than the depth of the rotor, and a frontal section that is identical to or smaller than the area of the cavity; iv. calculating the number of magnets to be inserted, for each polar sector, in a sequence so as to occupy only part of the total depth of the rotor as a function of the performances to be obtained; v. inserting the calculated number of magnets in a series of cavities aligned for each polar sector. The invention also relates to a rotor of a variable-reluctance synchronous motor assembled using the process set out above.

Abstract: UPS machine comprising a synchronous machine (9) coupled to an accumulator (10) of kinetic energy, which accumulator essentially comprises: a body (12) with a main shaft; a hollow drum (18) able to rotate about the axle; a pony motor, for starting the drum (18); a rotor (20) fastened to the main shaft coaxially with the drum (18), which is equipped with coils (24) in order to electromagnetically couple the drum (18) and the rotor (20); characterised in that: the rotor (22) comprises a core (21) made of iron with a certain number of poles (22) that are delineated by notches (23) parallel to the main shaft (11) and that are distributed around the circumference of the core (21) which, for each poll (22), is provided with a winding (24) wound in the notches (23) around the pole (22) in question; the cumulative width of all of the poles (22) in the narrowest portion thereof is at least equal to the cumulative width.

Abstract: A rotor of a rotating electrical machine includes a substantially annular rotor core and a plurality of magnetic pole portions formed at predetermined intervals in a circumferential direction of the rotor core. Each magnetic pole portion includes an outer diameter side magnet portion configured by an outer diameter side circular arc magnet arranged so as to protrude radially inward and an inner diameter side magnet portion located radially inward of the outer diameter side magnet portion and configured by a pair of inner diameter side arc magnets arranged so as to radially inward of the radially outer magnet portion. Each arc magnet is an arc magnet in which an inner peripheral surface and an outer peripheral surface have the same arc center.

Abstract: An magnet embedded type motor capable of reducing a counter electromotive voltage while suppressing reduction of a torque is provided. The magnet embedded type motor of the present disclosure includes a stator and a rotor rotatably disposed inside the stator. The rotor includes a rotor core and a plurality of magnet groups embedded in the rotor core along a circumferential direction, the rotor core includes a plurality of laminated metal foils. The rotor core has a pair of radially arranged magnet holes, a center side magnetic flux leakage prevention hole, and center side bridge portions for each magnetic pole. A pair of radially arranged magnets are embedded in the radially arranged magnet holes. In the rotor core, the center side bridge portion, a center portion, and an inter-magnetic pole portion are made of a nanocrystalline soft magnetic material, and another portion is made of an amorphous soft magnetic material.

Abstract: An asynchronous starting and synchronous reluctance electric motor rotor, an electric motor and a compressor. The asynchronous starting and synchronous reluctance electric motor rotor includes a rotor core. The rotor core includes: a first magnetic barrier structure, with multiple groups of first magnetic barrier portions arranged at interval along a d-axis of the rotor core; and a second magnetic barrier structure, including two communicating magnetic barrier slots arranged at interval along the d-axis, the two communicating magnetic barrier slots being respectively located on two sides of the first magnetic barrier structure, the communicating magnetic barrier slots being arc-shaped slots extending circumferentially along the rotor core, and slot walls of two ends of the arc-shaped slots being arranged parallel to a q-axis.

Abstract: A motor system can include a bearingless stator having a plurality of magnetic windings including rotation windings and suspension windings; a dipole interior permanent magnet (IPM) rotor positioned within the stator, the rotor having a plurality of permanent magnets disposed within a cylindrical structure; one or more position sensors to measure radial and angular position of the rotor; and a controller configured to receive measurements from the one or more position sensors and to generate current commands for the stator to excite the rotation windings to generate torque and to excite the suspension windings to stabilize the rotor within the stator.

Abstract: The invention relates to a method for producing a machine component (1) for an electrical machine, wherein the machine component (1) is formed with a magnetically conductive material, in which one or more magnetically nonconductive separating regions (4) are provided, wherein the separating region (4) is formed by the introduction of austenite-forming material during a melting process of the magnetically conductive material of the machine component (1), such that an austenitic structure is formed in the magnetically conductive material of the machine component (1).

Abstract: A rotor includes a hollow cylindrical rotor core that has a center hole, in which a rotating shaft is to be press-fitted, and a plurality of magnet-receiving holes in which a plurality of permanent magnets are respectively received. In a radially inner surface of the rotor core defining the center hole, there are formed a plurality of non-contacting recesses and a plurality of contacting protrusions alternately in the circumferential direction of the rotor core. Each of the non-contacting recesses is recessed radially outward so as not to be in contact with the rotating shaft. Each of the contacting protrusions protrudes radially inward so as to be in pressed contact with the rotating shaft. The rotor core further has a plurality of through-holes each of which penetrates the rotor core in the axial direction of the rotor core and is located radially outside a corresponding one of the contacting protrusions.

Abstract: A motor has a plurality of permanent magnet pieces aligned is such a manner as to surround an armature core and a magnetic-flux guide ring disposed between the permanent magnet pieces and the armature core for introducing a magnetic flux from the permanent magnet pieces to the armature core. The magnetic-flux guide ring has a confronting portion confronting each of the magnet pieces, an aperture formed in the confronting portion, and a connecting portion connecting adjacent two confronting portions. The aperture is formed in such a manner as to confront a boundary of adjacent magnet pieces.

Abstract: The proposed arrangement relates to an electric machine comprising a stator (7) and a rotor (8) moveable relative to the stator. The stator (7) has slots (1, 2) for accommodating electrical windings (+A, ?A), wherein teeth (3) of the stator are formed between adjacent slots. During operation of the machine, an operating wave of the magnetomotive force is different from a fundamental wave of the magnetic flux. The stator (7) comprises at least one recess (4) which is arranged in the tooth region and extends substantially in the radial direction.

Abstract: Electrical machines, for example transverse flux machines and/or commutated flux machines, may be “balanced” to achieve reduced overall cogging torque via utilization of one or more cogging torque reduction devices. Cogging torque reduction devices may be configured and/or otherwise customized in order to reduce and/or minimize cogging torque in an electrical machine, by generating a counteracting cogging torque waveform that at least partially counteracts and/or cancels the initial cogging torque waveform of the electrical machine.

Abstract: A rotating electric machine that is equipped with a stator that has teeth which are formed between adjoining slots and coils which are wound around the teeth, and a rotor that has magnetic pole sections at multiple aperture sections which are arranged in the circumferential direction, wherein magnetic flux saturation facilitating sections such as grooves for further facilitating magnetic flux saturation in magnetic flux saturation regions are provided at least on the stator or on the rotor at positions close to the magnetic flux saturation regions of the stator or the rotor in order to reduce torque ripples of the rotating electric machine.

Abstract: A method of making a stator module for use in a stator assembly of an electric machine includes temporarily supporting a plurality of stator segments in a desired orientation using a temporary support. The desired orientation of the stator segments is a relative orientation of the stator segments within the stator module. A mold is placed around the plurality of stator segments and the mold is filled with a potting material to form a stator module such that the potting material supports the stator segments in their desired orientation. The temporary support is removed.

Abstract: There is provided a stator core formed by stacking a plurality of single core sheets, each including a coreback having a central hole formed therein, a plurality of tooth parts extended from the coreback in a radial direction, and extension parts extended from the plurality of respective tooth parts in a circumferential direction, wherein at least one of the plurality of single core sheets includes through-holes formed therein in order to reduce cogging torque, the through-holes being formed in the extension parts.

Abstract: Construction arrangement of a permanent magnet rotor in an electric machine that comprises a plurality of notches having permanent magnets inserted axially to form the poles of the electric machine. The magnetic magnets are arranged in the notches made in the geometry of the magnetic plate constituting the mechanical structure of the rotor. The axial notches divide the geometry of the rotor stacked plate into two areas separated by a narrow magnetic strip known as the bridge, through which the dispersion magnetic flux is regulated. The dispersion magnetic flux established thereby is reduced by at least 20% because of the recess on the mentioned bridge.

Abstract: In a rotor for a rotary electric machine, a plurality of magnetic poles are provided in a radially outer portion of the rotor iron core, at intervals in the circumferential direction. Each magnetic pole includes a pair of permanent magnets disposed apart from each other in the circumferential direction, and a magnetic flux-restraining hole that is formed and extended radially inwardly between radially inner end portions of the permanent magnets and that restrains flow of magnetic flux. The magnetic flux-restraining hole is extended so as to project beyond a position of the radially inner end portions to a radially outer side, between the pair of permanent magnets.

Abstract: An improved configuration for an electric motor has an inner rotor and an outer stator wherein each stator coil is arranged radially outwardly of its respective stator pole and configured to create a magnetic flux path forming a closed magnetic circuit that flows in directions parallel to the longitudinal axis of the motor, rather than circumferentially about the longitudinal axis of the motor. The magnetic flux created by the stator coil is directed from the stator pole, across the air gap to a corresponding rotor pole, and back to the stator pole to form a closed magnetic circuit path. All stator poles are therefore magnetically isolated from each other.

Abstract: A rotor disk for a rotor of a synchronous reluctance machine consists of a disk body material with high magnetic permeability. In order to improve the ability of the rotor disk to stand centrifugal and thermal loads, spokes extending in radial direction between a shaft opening and a disk periphery are provided with spoke openings. These openings extend over a wide distance both in circumferential direction and in radial direction to worsen the heat conducting properties of the spokes and to render the spokes less stiff.

Abstract: An object is to provide a permanent magnet motor that highly reduces torque fluctuation, thereby reducing noise and vibration. The permanent magnet motor may be formed as follows: a length D of a permanent magnet 8 in a longitudinal direction is the same as or longer than a width A between sides of the magnetic pole tooth 3 in the circumferential direction in an end portion of the magnetic pole tooth 3, and a distance C between tip portions of a pair of the first slits 13a and 13b within the same pole is smaller than the width A between the sides of the magnetic pole tooth 3 in the circumferential direction in the end portion of the magnetic pole tooth 3. The permanent magnet motor, thus formed, may be characterized in that cut surfaces 12 face the first slits 13a and 13b.

Abstract: The present invention relates to an electric commutator motor (1) that comprises a stator (2) and a rotor core (3), wherein the magnetic flux transmittance between the rotor (3)-stator (2) is improved and the noise level is reduced by securing a ferromagnetic rotor sleeve (5) on the outer circumference press-fittingly. The sleeve is made of a ring shaped ferromagnetic laminations.

Abstract: Disclosed is a canned motor for restraining a cogging torque from being generated by inserting magnetic metal pins into slot openings of a stator, thereby reducing noise and vibrations during an operation of the canned motor. The canned motor includes: a can inserted into a housing to seal a coil mounted within the housing; and a stator installed on an outer peripheral surface of the can and inserted along an inner peripheral surface of the housing. A plurality of fixing guides protrude from an outer peripheral surface of the can and metal pins are inserted into the fixing guides to be integral with the fixing guide, such that the metal pins are inserted into and attached to slot openings of the stator when inserted into the stator.

Abstract: There is provided a stator core including: a coreback having an installation hole formed therein; a plurality of teeth extended from the coreback in a radial direction; and extension parts, each extended from each of the plurality of teeth in a circumferential direction and having a through-hole formed therein to reduce cogging torque.

Abstract: There is provided a stator core formed by stacking a plurality of single core sheets, each including a coreback having a central hole formed therein, a plurality of tooth parts extended from the coreback in a radial direction, and extension parts extended from the plurality of respective tooth parts in a circumferential direction, wherein at least one of the plurality of single core sheets includes through-holes formed therein in order to reduce cogging torque, the through-holes being formed in the extension parts.

Abstract: A motor has a plurality of permanent magnet pieces aligned is such a manner as to surround an armature core and a magnetic-flux guide ring disposed between the permanent magnet pieces and the armature core for introducing a magnetic flux from the permanent magnet pieces to the armature core. The magnetic-flux guide ring has a confronting portion confronting each of the magnet pieces, an aperture formed in the confronting portion, and a connecting portion connecting adjacent two confronting portions. The aperture is formed in such a manner as to confront a boundary of adjacent magnet pieces.

Abstract: An integrated stator flange assembly is disclosed. In one embodiment, the integrated stator flange assembly may have an outer surface and include: a stator flange; and a flux shield bonded directly to the stator flange, the flux shield forming a portion of the outer surface of the integrated stator flange assembly.

Abstract: There is provided a motor including: a sleeve supporting a shaft; a hub operating together with the shaft and including a magnet; a base coupled to the sleeve and including a core having a coil wound therearound, the coil generating rotational driving force; and a magnetic flux increase space part formed to be enclosed between the magnet and the hub in order to increase magnetic flux density between the magnet and the core.

Abstract: An electric alternator/motor having a stator with at least two non-overlapping sectors is provided. Each sector includes a first winding, first and second magnetic circuits and a saturation control assembly. A cross-talk reduction feature, such as a peripheral slit is provided between each sector of the stator for impeding magnetic flux crossing between the sectors.

Abstract: A rotor for a rotary electric machine includes a plurality of magnetic poles disposed at intervals in a circumferential direction, on an outer periphery of a rotor core that is a steel sheet stack that has a shaft hole in a central portion thereof configured so that a shaft is passed through and fixed to the shaft hole. The magnetic poles each have two permanent magnets and a magnetic flux suppression hole that regulates flow of magnetic flux from the permanent magnets, and are formed in such a manner that a shape of the magnetic flux suppression hole of at least one magnetic pole is different from a shape of the magnetic flux suppression hole of another magnetic poles, depending on the presence or absence of a positioning portion.

Abstract: In a rotor for a rotary electric machine, a plurality of magnetic poles are provided in a radially outer portion of the rotor iron core, at intervals in the circumferential direction. Each magnetic pole includes a pair of permanent magnets disposed apart from each other in the circumferential direction, and a magnetic flux-restraining hole that is formed and extended radially inwardly between radially inner end portions of the permanent magnets and that restrains flow of magnetic flux. The magnetic flux-restraining hole is extended so as to project beyond a position of the radially inner end portions to a radially outer side, between the pair of permanent magnets.

Abstract: A plurality of magnetic poles are disposed at intervals, in a circumferential direction, at an outer periphery of a rotor core. Each magnetic pole has a pair of permanent magnets disposed spaced apart from each other in the circumferential direction, and a magnetic flux suppression hole that suppresses flow of magnetic flux and that is formed extending on the inward side in the radial direction, between inner-periphery-side end portions of each permanent magnet. The magnetic flux suppression hole is formed of two first holes respectively communicating with magnet insertion holes into which the permanent magnets are inserted, and a second hole that is formed between the first holes with bridge portions interposed therebetween. An outer-periphery-side end portion of the second hole is positioned further outward than an imaginary straight line that passes through the inner-periphery-side end portions of the pair of permanent magnets.

Abstract: A magnetically isolated phase stator includes a stator phase section with two sides and a magnetically inactive isolation region on each side that prevents a permanent magnetic field from being shared from the stator phase section and another stator phase section of the stator. A magnetically isolated phase interior permanent magnet electrical rotating machine includes a magnetically isolated phase stator, a rotor, and an air gap between the stator and rotor defining a rotor-stator interface, the rotor having two or multiples of two permanent magnets arranged in parallel with opposing magnetic poles to direct magnetic flux through a pole of the rotor, through the air gap of the rotor-stator interface, and through a pole of the stator.

Abstract: Disclosed is an interior permanent magnet type brushless direct current (BLDC) motor including a stator having a plurality of slots wound in a distributed winding manner, and a rotor positioned in the stator, configured to rotate with respect to the stator, and having a rotor core, a plurality of permanent magnets inserted in the rotor core and a plurality of flux barriers, wherein a flux barrier angle of the rotor is determined by multiples of twenty as an electrical angle and the multiples of twenty relates to a number of slots of the stator.

Abstract: An interior permanent magnet type brushless direct current (BLDC) motor includes a stator having a plurality of slots. The BLDC motor also includes a rotor positioned in the stator and that is rotatable with respect to the stator. The rotor has a rotor core, a plurality of permanent magnets inserted in the rotor core, a plurality of vent holes positioned between the center of the rotor core and the permanent magnets, and a plurality of coupling holes positioned between the permanent magnets and a periphery of the rotor core.

Abstract: An electric machine (1), particularly used as an electric motor, has a rotor (2) comprising a plurality of disks (4). A disk (4) of the rotor (2) is divided in a circumferential direction (5) into a plurality of disk sectors (6, 7, 8) between which magnetic pockets (9, 10) are designed. Furthermore, the disk (4) has an inner fastening collar (15) and connecting members (20, 23, 24) connecting the disk sectors (6, 7, 8) to the fastening collar (15). Such a connecting member (20) comprises a main web (21), a side arm (30) branching off the main rib (21) in the circumferential direction (5), and a side arm (31) branching off the main web (21) opposite to the circumferential direction (5). High mechanical stability of the disk (4) can thus be ensured, wherein magnetic flow losses are reduced.

Abstract: An electromagnetic machine stator has a common pole and a plurality of excitation poles. Each excitation pole has a coil wound around it for inducing a magnetic flux through the excitation pole. The common pole that does not have a coil wound around it for inducing a magnetic flux. A flux barrier, disposed within the common pole, inhibits the flow of flux from one part of the common pole across the flux barrier to another part of the common pole. The flux barrier is less conducive to the flow of flux than is the common pole.

Abstract: The present invention provides a brushless motor for a fluid pump that allows implementing a fluid pump that overcomes problems of durability and reduction of energy efficiency due to DC motors in the related art and provides excellent operational characteristics, by ensuring a space allowing fluid to flow between a stator and a rotor, and ensuring and maintaining excellent driving characteristics of a motor, and a fluid pump using the brushless motor.

Abstract: A blushless direct current (BLDG) motor apparatus includes: a stator which is provided with a plurality of windings corresponding to N phases and wound in parallel independently of each other; a rotor which has a plurality of poles corresponding to the plurality of windings and rotates with respect to the stator by excitation of the windings; a switching unit which is provided in the form of a full H-bridge with respect to each phase, comprises a pair of upper switching devices corresponding to a (+) side of the winding and a pair of lower switching devices corresponding to a (?) side of the winding, and performs a switching operation to supply or not to supply driving power to the winding; a first sensing device which senses the phase of the rotor with respect to the stator to determine whether to turn on or off the upper switching device; a second sensing device which is provided in the latter part than the first sensing device and senses the phase of the rotor with respect to the stator to determine whethe

Abstract: An electric machine including a housing and a stator arranged within the housing. The stator includes a body having a first end that extends to a second end through an intermediate portion. The intermediate portion includes an inner diametric surface and an outer diametric surface. A sleeve member is arranged on the outer diametric surface of the stator. The sleeve member includes body member having an inner diametric region that extends to an outer diametric region through an intermediate region. The sleeve member defines a flux carrying member having a magnetic flux flow path that passes magnetic flux from the stator to the outer diametric region.

Abstract: An electrical machine comprising a stator and a rotor rotatable relative to the stator with an air gap therebetween is disclosed. The stator is provided with a first plurality of sources of magnetic field which is equally spaced in a circumferential configuration over the stator. The rotor is provided with a second plurality of sources of magnetic field which is equally spaced in a circumferential configuration over the rotor. The magnetic sources of at least one plurality are electromagnets; each electromagnet comprises at least one magnet coil resting on a magnet conductor. The magnetic conductor comprises at least one member made of magnetically isotropic and/or anisotropic materials.

Abstract: A motor having a rotor and a stator is disclosed. The rotor is a consequent-pole rotor having a rotor core, a plurality of magnets, and a plurality of salient poles. The stator includes a plurality of teeth. A first auxiliary groove is formed in a surface of each salient pole that is opposed to the teeth. Each first auxiliary groove has first and second side surfaces facing each other in the circumferential direction. The first side surface is closer to a circumferential center of the salient pole than the second side surface. When the angle from the circumferential center line to the first side surface of each salient pole about the axis of the rotor is represented by KC1, the opening angle between the circumferential ends of the distal end of each tooth about the axis is represented by KA, and the opening angle between the circumferential ends of each salient pole about the axis is represented by KB, the following expression is satisfied: KC1=KA?KB/2.

Abstract: An electric alternator/motor having a stator with at least two non-overlapping sectors is provided. Each sector includes a first winding, first and second magnetic circuits and a saturation control assembly. A cross-talk reduction feature, such as a peripheral slit is provided between each sector of the stator for impeding magnetic flux crossing between the sectors.

Abstract: An inner rotor type motor includes a base having a pivotal portion. A stator is mounted to the base and includes a body and a coil unit engaged with the body and surrounding a hole of the body. A rotor includes a rotatable member, a shaft, and a permanent magnet. The rotatable member includes an engaging portion and a sidewall provided along a periphery of the engaging portion extending into the hole of the stator. The shaft includes an end coupled to the engaging portion. The other end of the shaft is coupled to the pivotal portion. The permanent magnet is mounted to an outer periphery of the rotatable member and aligned with the coil unit. The axial length of the shaft without permanent magnet mounted thereto can be reduced, allowing reduction of axial heights of the motor and a heat dissipating fan utilizing the motor.

Abstract: A synchronous reluctance motor comprises a stator and a rotor, the rotor comprising: a rotation shaft; a first core having a shaft hole for inserting the rotation shaft at a center thereof, and having a plurality of first flux barrier groups arranged along a circumferential direction of the shaft hole and spacing from each other; and a second core having a receiving hole larger than the shaft hole at a center thereof, and stacked at one side of the first core in an axial line direction. A length of the rotor protruding from a supporting portion can be decreased without reducing a stacked thickness thereof, and a vibration occurrence in a horizontal direction with respect to the rotation shaft can be reduced, thereby enhancing a reliability of the synchronous reluctance motor.

Abstract: The present invention provides a rotor for an interior permanent magnet synchronous motor for driving an air blower, in which the structure of the rotor is suitably modified to reduce magnetic flux leakage and, at the same time, maximize saliency ratio, thus improving the performance of the motor.

Abstract: The invention relates to a current-energized synchronous motor (1) which is suitable in particular for vehicle drives. It consists of a stator (2) and a rotor (3) carrying the energizer winding (7), the rotor (3) having at least two rotor poles (4) with one energizer winding (7) each. The essential feature of the invention is that at least one selective magnetic flux barrier, in particular in the form of a radial slot (8) along the main axis (4A) of the rotor pole (4), is provided in each rotor pole (4) for increasing the reluctance moment of the current-energized synchronous motor (1).

Abstract: A high temperature superconducting synchronous motor having an inductor topology that increases the air gap flux density in direct relation to motor power density by trapping flux and concentrating it in the air gap to obtain more power in the same volume or smaller volume for the same power, and whose geometry enables the induction motor to be lighter than superconducting motors without the inductor topology, the motor being positioned in a housing, and the motor comprising: a) stator means having an armature winding to provide a stator field; c) rotor means positioned within the stator field and on which is disposed at least two polygon shaped ring or coil means along the same axis to provide separated and spaced apart relationship field solenoids; c) at least four high temperature superconducting plate means disposed in alternating relationship between the ring or coil means to hold the ring or coil means together to trap magnetic field and shape flux lines; and d) cooling means to cool the superconduct

Abstract: The present invention relates to a magnetic flux conducting unit (10) for electromagnetic apparatus, the electromagnetic apparatus being operative to convert one of mechanical energy and electrical energy into the other of mechanical energy and electrical energy. The magnetic flux conducting unit comprises at least one magnetic flux conducting element (12a, 12b) formed of a magnetically permeable material. Also, the at least one magnetic flux conducting element defines: a coil receiving space (18) for receiving a coil assembly (32) of the electromagnetic apparatus; and at least one material receiving space (16, 30a, 30b), which accommodates a substantially magnetically impermeable material.