Abstract: A rotor includes at least one first permanent magnet and at least one second permanent magnet. The at least one first permanent magnet forms part of an outer peripheral surface of the rotor and is magnetized to have polar anisotropy. The at least one second permanent magnet is adjacent to the at least one first permanent magnet in a circumferential direction of the rotor and has lower magnetic force than magnetic force of the at least one first permanent magnet.

Abstract: The present invention relates to a gear motor (101), in particular for a wiper system, comprising: -a brushless DC electric motor (103) including: -a rotor; -a stator having coils for electromagnetically exciting the rotor; -a device for determining the angular position of the rotor; -a control unit configured to generate control signals for supplying power to the electromagnetic excitation coils of the stator; -a reduction mechanism (104) that is linked on one side to the rotor of the electric motor (103) and on the other side to an output shaft (109), the reduction mechanism (104) having a predefined reduction ratio and; -an output angular position sensor (110) that is configured to measure the angular position of the output shaft (109), wherein the output angular position sensor (110) that is configured to transmit a signal corresponding to the measured angular position of the output shaft (109) to the device for determining the angular position of the rotor and said device is configured to determine the p

Abstract: A stator (30) of an electric machine has a stator lamination stack (20) that comprises stator laminations (1). The stator (30) has at least one stator winding with conductor bars (31) arranged in slots of the stator lamination stack (20) and fixed in the slots of the stator lamination stack (20) with the aid of a fixing device. To improve the stator (30) with regard to the service life thereof and/or to the producibility thereof, at least one clamping stator lamination (8;28) has a clamping geometry that serves as the fixing device.

Abstract: A wiper system including a brushless DC electric motor having a rotor, a stator having coils for electromagnetically exciting the rotor, a device for determining the angular position of the rotor with respect to the stator, a control unit configured to generate control signals for supplying power to the electromagnetic excitation coils according to the angular position of the rotor determined by the device for determining the angular position of the rotor, a reduction gear mechanism linked, on one side, to the rotor of the electric motor and, on the other side, to an output shaft that is intended to be linked to an external mechanism. The rotor includes at least one Hall effect sensor associated with a control magnet that rotates with the rotor and the gear motor also having a processing unit connected to the device for determining the angular position of the rotor.

Abstract: Provided is a laminate having a reduced loss ratio while maintaining a high space factor. The present disclosure relates to a laminate for use in a core, comprising: a strip laminate composed of soft magnetic metal strips; and an insulating layer provided on a surface of the strip laminate, wherein each one layer of the soft magnetic metal strips has a thickness of 100 ?m or less, each one layer of the soft magnetic metal strips has an oxide film on their surfaces, the strip laminate is composed of at least two layers of the soft magnetic metal strip, and the strip laminate and the insulating layer are alternately disposed.

Abstract: A stator carrier for a stator of a wind turbine generator, in particular a multi-pole slowly rotating synchronous ring generator. It is proposed that the stator comprises a first carrier plate, a second carrier plate, a cavity which is provided between the two carrier plates and is open radially outwardly, a separating plate which is arranged between the two carrier plates and which subdivides the cavity into a first cavity portion and a second cavity portion, wherein there is provided a number of first flow passages extending from the first carrier plate directly into the second cavity portion and a number of second flow passages extending from the second carrier plate directly into the first cavity portion. There is further proposed a stator having such a stator carrier as well as a generator and a wind turbine having same.

Abstract: A synchronous reluctance machine includes a stator and a rotor which is spaced apart from the stator by an air gap. The rotor rotatably mounted about an axis and includes laminations which are arranged axially one behind the other. Each lamination has an anisotropic magnetic structure which is formed by flux blocking sections and flux conducting sections. The flux blocking sections and flux conducting sections form poles of the rotor, with the flux blocking sections forming axially running channels and allowing an axial air flow. The laminated core of the rotor is axially subdivided into at least two component laminated cores, with radial cooling gaps being formed between the poles in the region of the q axis as viewed in a circumferential direction and between the component laminated cores as viewed axially.

Abstract: The invention pertains to a stage system, and to a lithographic apparatus and a method for manufacturing a device in which a stage system is used. In the stage system a positioning system is provided comprising an actuator adapted to position an object table. The actuator comprises a magnet assembly and a coil assembly. The magnet assembly comprises a first magnetic body and a second magnetic body, which are in use subjected to a internal magnetic force. The magnet assembly has a separate interface for connecting each magnetic body to the object table separately. The magnet assembly further comprises a spacer device, which holds the first and second magnetic body at a relative distance to each other in at least the direction of the internal magnetic force.

Abstract: A magnetic core for an electric motor has a ring-shaped yoke, teeth extending outwardly from the yoke, and a tooth tip extending from a distal end of each tooth. The core is formed from curved or coils strip laminations having teeth arranged in tooth groups. Each group has four tooth types arranged sequentially. Each tooth has left and right half tooth tips. The length of the half tooth tips vary according to tooth type. When assembled, first type tooth overlap with third type teeth and second type teeth overlap with fourth type teeth, whereby the opening of the winding slot is narrowed compared to laminations having all identical teeth.

Abstract: A craft damper (torsion damper) includes a crankshaft (shaft member) to be input with a torsion vibration, a disc member coaxially attached to the crankshaft, a ring-shaped inertia mass body connected to an outer peripheral side of the disc member via a magneto-rheological elastomer member so as to be coaxial with the crankshaft, and an electromagnetic coil for applying a magnetic field to the magneto-rheological elastomer member.

Abstract: A stator for an electric motor includes a yoke and a star disposed in the yoke. The star is configured to receive a rotor therein and has at least one wire coiled thereat. The yoke and the star are configured such that the star is axially insertable into the yoke with reduced interference and reduced insertion force. The star is axially inserted into the yoke in an unlocked position. When the star is inserted into the yoke, the star is rotatable to a locked position, whereby the star is retained at the yoke via an interference fit.

Abstract: An electrical rotary machine comprises a stator having a plurality of split cores arranged in an annular shape and a holding ring capable of retaining the plurality of split cores on an inner circumferential surface so that a surface pressure is applied to an outer circumferential surface of the split cores. The electrical rotary machine further comprises a rotor provided radially inside of the stator facing the split cores in a radial direction and rotatable relative to the stator. Each of the split cores includes a tooth portion extending in an radial direction and a back yoke portion extending in a circumferential direction. Each of the split cores further includes a slit penetrating an outer circumferential periphery of the back yoke portion except for either circumferential end of the back yoke portion.

Abstract: An electrical machine stator assembly comprises: an electroconductive coil arranged circumferentially with respect to the rotational axis; a plurality of pairs of side lamination assemblies arranged circumferentially with respect to the rotational axis; a plurality of pairs of switch lamination assemblies arranged circumferentially with respect to the rotational axis and positioned adjacent ends of side lamination assemblies proximal the rotor; and at least one tooth associated with each switch lamination assembly and proximal the rotor. Each switch lamination assembly comprises a first group of laminated materials aligned generally circumferentially and generally in a first direction with respect to the rotational axis, the first direction being one selected from the group consisting of the axial and radial directions with respect to the rotational axis.

Abstract: Disclosed herein is a laminated core of a motor including: a first core sheet including a first rounded core base, a plurality of first teeth which are radially formed on the first core base, and first tooth ears formed at the end of each of the first teeth; and a second core sheet including a second rounded core base, a plurality of second teeth which are radially formed on the second core base, and second tooth ears formed at the end of each of the second teeth, the second core sheet having the same shape as the first core sheet but being smaller than the first core sheet, wherein the second core sheet is located at the lowermost part, one or more the first core sheets are laminated on the second core sheet, and another second core sheet is located at the uppermost part.

Abstract: A spindle motor is provided, the motor including a bearing assembly including a bearing housing that further includes a housing body and a plurality of staircase sills formed at a periphery of the bearing housing, and a bearing disposed inside the bearing housing; a stator including a core that further includes core pieces formed with through holes at which each of the staircase sills is hitched, and a coil wound on the core; a rotation shaft inserted into a rotation shaft hole of the bearing; and a rotor including a yoke coupled to the rotation shaft and a magnet secured at an inner lateral surface of the yoke to face the core.

Abstract: A permanent magnet rotor includes at least one permanent magnet and a rotor core including a first end and a second end. The rotor core includes a plurality of permanent magnet openings that are each configured to receive a permanent magnet. The permanent magnet rotor also includes a first rotor end lamination coupled to the first rotor core end. The first rotor end lamination includes a plurality of inner lamination walls defining a first lamination opening and a second lamination opening circumferentially adjacent the first lamination opening. At least one inner lamination wall includes at least one permanent magnet retention feature configured to secure the permanent magnet within a corresponding permanent magnet opening. The at least one permanent magnet retention feature includes at least one tab extending radially from at least one of the plurality of inner lamination walls within the first rotor end lamination.

Abstract: Permanent magnet synchronous machines (100) are described having good efficiency, as well as corresponding methods for making a stator (110) or stator teeth (114) for such machines. A method for fabricating a stator (110) for an axial flux permanent magnet synchronous machine is for example described comprising obtaining several sets of substantially identical laminates (302), and stacking the sets of substantially identical laminates (302) so that a subsequent laminate has a part overlapping (304) the previous laminate and a part not overlapping (306) the previous laminate. Alternatively, a method of manufacturing a stator (110) is described wherein the method comprises obtaining a set of laminates (302) connected to each other with a thin strip (402) of material and creating a stack by folding the laminates (302) along the thin strip (402) of material.

Abstract: An electrical machine stator is disclosed that includes a stack of laminations configured to be assembled together so as to define at least one stator tooth. The stack of laminations may include a plurality of nesting laminations and a plurality of shim laminations. Each nesting lamination may include a first edge section, a second edge section and a middle section extending between the first and second edge sections. At least one of the first edge section and the second edge section of each nesting lamination may be configured to be engaged against at least one of the first edge section and the second edge section of an adjacent nesting lamination when the stack of laminations is assembled together. Additionally, at least one shim lamination may be disposed between each pair of adjacent nesting laminations.

Abstract: A generator core that increases the amount of power generated by a generator is provided. A plurality of magnetic steel sheets including non-divided magnetic steel sheets and divided magnetic steel sheets are stacked on each other to form a plurality of divided cores. The divided magnetic steel sheets are disposed to form a gap portion that crosses a magnetic path in one magnetic steel sheet. Each gap portion is positioned and shaped such that magnetic resistances of magnetic pole portions of the plurality of divided cores are not different from each other.

Abstract: Provided is a rotary electric machine, including: a stator; and a rotor provided on the stator so as to be rotatable about a rotation shaft, in which the rotor includes, at an outer circumference thereof, magnetic poles arranged so as to have different polarities alternately, the magnetic poles being formed of a rotor core in which electromagnetic steel plates are stacked, the magnetic poles being excited by permanent magnets which are housed in gaps disposed at an outer circumferential part of the rotor core, and in which the rotor core includes, at an inner circumferential part thereof, in the same stack plane: a short circuit magnetic path connecting magnetic pole pieces which form the magnetic poles; and a protruding portion held in contact with the permanent magnets, which is positioned between magnetic pole pieces which are not connected to the short circuit magnetic path.

Abstract: An electric machine is provided. The electric machine includes a stator, a rotor and a closed cooling channel through which a gaseous cooling medium circulates. The stator includes a stator lamination at least partially encasing several stator windings. The closed cooling channel is disposed in circumferential direction of the stator lamination. The stator lamination is at least partially formed as fins.

Abstract: An electrical rotating machine including a stator core is provided. The stator core is formed of substantially sector-shaped sheet segments die-cut from electrical steel sheets and arranged in a circumferential direction of the stator core to form circular sheets which are stacked in an axial direction of the stator core. In the electrical rotating machine, end regions of the stator core are formed of stacked sheet segments die-cut from non-grain oriented steel sheets, and the other region of the stator core is formed of stacked sheet segments die-cut from grain oriented steel sheets.

Abstract: A laminated stator and a method for making a laminated stator of an electric motor. The method includes arranging a plurality of stator laminations into lamination stacks spaced axially from one another, each lamination stack including a first group of stator laminations including an annular portion and a plurality of tooth portions extending from a periphery of the annular portion, and a second group of stator laminations including only tooth portions positioned to correspond with the tooth portions of said first group. The method further includes winding stator windings around selected subsets of the plurality of teeth while the lamination stacks are spaced axially and meshing the lamination stacks with one another so the annular portions of the lamination stacks are axially adjacent one another and the plurality of teeth are intermeshed with the plurality of another stack.

Abstract: A method for securing a permanent magnet within a rotor core is described. The rotor core includes a first end and a second end and at least one permanent magnet opening configured to receive the permanent magnet. The method includes coupling a first rotor end lamination to the first end of the rotor core. The first lamination includes at least one inner wall that defines an opening within the first lamination that corresponds to the permanent magnet opening in the rotor core. The first lamination includes a bridge portion positioned between the at least one inner wall and an outer edge of the first rotor end lamination. The method also includes positioning a permanent magnet at least partially within the permanent magnet opening and mechanically deforming the bridge portion of the first lamination to secure the permanent magnet within the permanent magnet opening.

Abstract: A magnetic circuit structure, such as a motor, is provided with: a rotor having rotor-side magnetic poles formed on the outer surface; and a stator having stator-side magnetic poles formed on the inner surface. The magnetic circuit structure has an air gap between the outer surface of a rotor-side magnetic pole and the inner surface of a stator-side magnetic pole in the location where the rotor-side magnetic pole and the stator-side magnetic pole face each other. At least one pair of a protrusion and a recess is created so that the outer surface of a rotor-side magnetic pole and the inner surface of a stator-side magnetic pole face each other through the air gap in the direction of the actual line of the rotation axis, and each pair of a protrusion and a recess has two or three steps in the direction of the radius around the rotation axis.

Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.

Abstract: An electric machine includes a rotor lamination assembly having a lamination member formed from a material having a first yield strength. The lamination member includes a first bridge portion having a first width, and a first bridge zone having a first thickness. The rotor lamination assembly also includes at least one lamination section having a second bridge zone having a second thickness. The second thickness is greater than the first thickness. The rotor lamination assembly further includes at least one lamination element formed from a second material having a second yield strength that is higher than the first yield strength, and at least one lamination component. The at least one lamination component includes a second bridge portion having a second width. The second width is greater than the first width.

Abstract: A stator core for a stator of an electrical machine includes an elongate stator yoke having an interior surface that defines an axial central opening through the stator yoke. The interior surface further defines a plurality of axial channels about a perimeter of the central opening. A plurality of stator teeth are retained in the plurality of axial channels and spaced apart from one another to define to define axial channels to receive windings of the stator.

Abstract: A stator core for a stator of an electrical machine includes an elongate stator yoke having an interior surface that defines an axial central opening through the stator yoke. The interior surface further defines a plurality of axial channels about a perimeter of the central opening. A plurality of stator teeth are retained in the plurality of axial channels and spaced apart from one another to define to define axial channels to receive windings of the stator.

Abstract: A rotating electrical machine includes a stator including a stator core and a rotor. The stator core includes an annular-shaped first stack core and an annular-shaped second stack core. The first stack core includes first core pieces and first couplers. The first core pieces are spirally stacked. The first couplers mutually couple the first core pieces. The second stack core includes second core pieces and second couplers. The second core pieces are spirally stacked. The second couplers mutually couple the second core pieces. An outside shape of the second stack core is larger than an outside shape of the first stack core in a radial direction. The first stack core and the second stack core are alternately arranged in a stack direction. The rotor is provided on an inner peripheral side of the first stack core and the second stack core.

Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.

Abstract: An electric induction motor assembly includes a rotor assembly and a stator assembly. The rotor assembly includes an exposed bar rotor comprising a plurality of axially stacked, punched-to-size rotor laminations. The stator assembly includes a plurality of axially stacked, punched-to-size stator laminations. Each of the laminations presents an axial thickness of less than 0.024 inches. The rotor assembly and the stator assembly cooperatively define a radially extending air gap between a radially outer periphery of the rotor assembly and a radially inner periphery of the stator assembly that is less that 0.012 inches.

Abstract: A stator for a motor contains a number of stator sheets stacked in a star-shaped laminated core. The stator sheets contain stator sheets closed in the circumferential direction and have single teeth connected to one another by pole shoe webs and stator sheets open in the circumferential direction and have single teeth spaced apart from one another to form a gap. A bottom starting block is adjoined by a repeat block which has N identical repeat sequences. Each repeat sequence contains n directly consecutive open stator sheets with a gap on the pole shoe side and at least one closed stator sheet. The laminated core also has a terminating block and an intermediate block between the repeat block and the terminating block. The intermediate block contains a closed stator sheet and/or a gap on the pole shoe side created by m open stator sheets, where 1?m?n?1.

Abstract: A stator includes an annular core back portion, a plurality of teeth extending radially outward from an outer circumference of the core back portion, and coils. A cylindrical portion of a housing includes a contact portion and a coming-off preventing portion arranged above the contact portion on an outer circumference of the cylindrical portion. The core back portion includes a small-diameter opening defining portion and a large-diameter opening defining portion arranged above the small-diameter opening defining portion. The cylindrical portion is arranged radially inward of the core back portion. The stator is held by the cylindrical portion with a lower surface of the core back portion arranged in contact with the contact portion and an upper surface of the small-diameter opening defining portion arranged in contact with the coming-off preventing portion. A bearing member is arranged radially inside the large-diameter opening defining portion and above the coming-off preventing portion.

Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.

Abstract: The present invention relates to a permanent-magnet synchronous motor, particularly an electric three-phase motor, comprising a stator having a stator yoke in which stator teeth with interposed stator grooves are arranged, wherein on each stator tooth at least one winding is provided, further comprising a rotor having permanent magnets, wherein the stator teeth are arranged in layers as disks in the axial direction of the stator and designed at least as two different disks, wherein the stator teeth in a first disk are connected peripherally among each other at the ends thereof pointing toward the rotor in the form of a stator star by a connecting bridge and in a second disk have an interruption instead of the connecting bridge. The present invention further relates to an electric power-assisted steering system.

Abstract: An electric machine includes a rotor lamination assembly having a lamination member formed from a material having a first yield strength. The lamination member includes a first bridge portion having a first width, and a first bridge zone having a first thickness. The rotor lamination assembly also includes at least one lamination section having a second bridge zone having a second thickness. The second thickness is greater than the first thickness. The rotor lamination assembly further includes at least one lamination element formed from a second material having a second yield strength that is higher than the first yield strength, and at least one lamination component. The at least one lamination component includes a second bridge portion having a second width. The second width is greater than the first width.

Abstract: Disclosed herein is a structure for cooling the stator of a superconducting rotating machine. The structure includes a stator coil. Slots are axially disposed at the stator coil to support the stator coil, and a space is defined between the slots to allow the stator coil to be partially exposed. A stator yoke is disposed on the slots such that a space is defined between the exposed portion of the stator coil, the slots and the stator yoke. A cooling tube is disposed in the space defined between the exposed portion of the stator coil, the slots and the stator yoke, thus simultaneously cooling both the stator coil and the stator yoke.

Abstract: A generator rotor core (54) carrying superconducting windings (60) and having a shield (426) over the superconducting windings (60) to prevent external magnetic fields from impinging the windings. Axial shield edges (430/434) mate with corresponding features of the rotor core (54) or with structures affixed to or supported by the core (54) to support the shield (426).

Abstract: A motor includes an output shaft rotatably provided, a rotor fixed to the output shaft and rotatable with the output shaft, a stator formed by a lamination of plurality of electrical steel sheets made by a magnetic material, the electrical steel sheets being punched by means of a press working, a coil wound at the stator, and a case accommodating the stator and the rotor and including a holder for holding the stator. The electrical steel sheets are arranged at one end of the stator in a lamination direction thereof and at the other end of the stator in the lamination direction thereof respectively. The electrical steel sheets include surfaces each at which a shear droop is formed. The surfaces of the electrical steel sheets face each other.

Abstract: A dual-rotor motor provided with a stator having a stator core including a yoke, a plurality of teeth and a coil wound around the stator core, an inner rotor and an outer rotor, wherein the stator core includes an annular yoke component forming the yoke, and a plurality of tooth components forming the teeth. The stator core is made by fitting the tooth components individually into the annular yoke component in a manner that one ends of the tooth components protrude from the inner peripheral side of the annular yoke component and the other ends protrude from the outer peripheral side of the annular yoke component.

Abstract: A laminated stator and a method for making a laminated stator of an electric motor. The method includes arranging a plurality of stator laminations into lamination stacks spaced axially from one another, each lamination stack including a first group of stator laminations including an annular portion and a plurality of tooth portions extending from a periphery of the annular portion, and a second group of stator laminations including only tooth portions positioned to correspond with the tooth portions of said first group. The method further includes winding stator windings around selected subsets of the plurality of teeth while the lamination stacks are spaced axially and meshing the lamination stacks with one another so the annular portions of the lamination stacks are axially adjacent one another and the plurality of teeth are intermeshed with the plurality of another stack.

Abstract: A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core.

Abstract: An axial gap type motor 10 includes: a rotor 11 having a rotor core 13, the rotor core 13 including: multiple main magnet pieces 41 respectively magnetized in a direction of the rotation axis O of the rotor, and multiple main magnet piece storing hole portions 15 respectively for holding associated main magnet pieces; and a pair of stators 12 to be mounted onto the rotor 11, wherein the rotor core 13 is structured by winding a tape-shaped magnetic plate 14, and includes a first winding layer and a second winding layer; and in portions of the first and second winding layers that are situated in the same phase from the center of rotation of the rotor core 13, the first winding layer includes an outside magnetic flux short preventive portions 62, and the second winding layer includes an outside connecting portions 61.

Abstract: In an embedded magnet motor, radial magnets and first inclined magnets form north poles. The radial magnets and second inclined magnets form south poles. Core sheets each include preformed radial accommodating slots the number of which is expressed by P/2. Some of the preformed radial accommodating slots are short slots and the rest are long slots. The short slots are located at some parts of each radial accommodating slot along the axial direction. Radially inner ends of the short slots restrict the radial magnets from moving radially inward.

Abstract: A hermetic compressor has a bipolar permanent magnet motor where permanent magnet is disposed in rotor core. A hollow bore is disposed at the end on the compressing element side of the rotor core, and main bearing extends into the bore. The thickness of the rotor core is longer than that of the stator core, thereby widening the magnetic path of the rotor core. The magnetic flux amount generated in the rotor core, which is conventionally insufficient due to existence of the bore, increases, the loss decreases, and the efficiency increases.

Abstract: A rotor (3) for a permanent magnet motor has a is rotatable around an axis of rotation (A) and has a plurality of axially extending permanent magnets (6) which are offset circumferentially in a symmetrical manner and arranged, respectively, in receptacles (16) of a yoke (7) which is assembled from axially stacked sheet lamellas (10), with the sheet lamellas (10) each having a coaxial inner hole (9), at least a first recess (8a) which is open toward the inner hole (9), and one second recess (8b) which is closed toward the inner hole (9), and with the lamellas being formed in a rotationally symmetrical manner so as to be offset at least by a phase angle, with at least two sheet lamellas (10) being oriented so as to be offset relative to one another by half of the phase angle.

Abstract: In an embedded magnet motor, radial magnets and first inclined magnets form north poles. The radial magnets and second inclined magnets form south poles. Core sheets each include preformed radial accommodating slots the number of which is expressed by P/2. Some of the preformed radial accommodating slots are short slots and the rest are long slots. The short slots are located at some parts of each radial accommodating slot along the axial direction. Radially inner ends of the short slots restrict the radial magnets from moving radially inward.

Abstract: A rotating electric motor includes a rotary shaft capable of rotation, a stator core formed in a cylindrical configuration, a rotor core fixed to the rotary shaft, a magnet set at the rotor core such that a pair of magnetic poles of different magnetism are aligned in the radial direction of the rotor core, a field yoke provided at the perimeter of the stator core, and a winding that can control the magnetic flux density across the rotor core and the stator core by forming a magnetic circuit across the field yoke and the rotor core.

Abstract: An active magnetic bearing (100) with autodetection of position, the bearing comprising at least first and second opposing electromagnets (120, 130) forming stators disposed on either side of a ferromagnetic body (110) forming a rotor and held without contact between said electromagnets. The first and second electromagnets (120, 130) each comprising a magnetic circuit (121; 131) essentially constituted by a first ferromagnetic material and co-operating with said ferromagnetic body to define an airgap, together with an excitation coil (122; 132) powered from a power amplifier whose input current is servo-controlled as a function of the position of the ferromagnetic body relative to the magnetic circuits of the first and second electromagnets.