Abstract: A rotor includes at least one of a group of one or more auxiliary magnets that are located between first and second claw poles in a circumferential direction and magnetized to be magnetic poles of the same polarity as the first and second claw poles and another group of one or more auxiliary magnets that are located on a rear side of the first and second claw poles and magnetized to have radially outer portions of the same polarity as the first and second magnetic poles. The auxiliary magnets are arranged to protrude beyond at least one of axial end surfaces of the first and second core bases.

Abstract: An output shaft (14) of a starting device (1) is provided to equip a motor vehicle. This output shaft (14) comprises a mounting support (16), a driving element (17) on the mounting support (16) intended to transmit a rotation movement to a thermal engine, and a track (15) on the mounting support (16) intended to transmit a rotation movement to the mounting support (16), this track (15) being driven by a freewheel of a starter-head assembly of the starting device. The track (15) is attached and secured to the mounting support (16).

Abstract: A rotor includes first and second rotor cores and a field magnet placed between the first and second rotor cores. Each of the rotor cores has a main body portion and a plurality of extensions, which extend radially outward from the main body portion at equal intervals in the circumferential direction. The field magnet causes the individual extensions to function as magnetic poles. A magnetic pole constituting section including at least part of each of the extensions and the first main body portion of each rotor core are made of different materials, made of the same material but formed as separate elements, or includes regions having different properties.

Abstract: A stator is provided for a bicycle generator hub. The stator comprises a coil bobbin and a plurality of first and second yokes. The first and second yokes are radially arranged on opposite axial ends of the bobbin. Each of the first and second yokes includes a magnetic pole section extending along an axial direction of the coil bobbin and facing the external circumferential surface of the coil bobbin, an insertion section t extending along the axial direction of the coil bobbin and facing the internal circumferential surface of the coil bobbin, and a connecting section extending radial direction of the coil bobbin and connecting the first magnetic pole section and the first insertion section together. The insertion sections of the first yokes have first end portions that abut two corresponding ones of second end portion of the insertion sections of the second yokes.

Abstract: A rotor for a rotary electric machine, the rotor including first and second pole pieces each having a respective magnetic hub arranged for rotation about an axis along which they are spaced. Pluralities of magnetic first and second pole fingers are spaced from each other and extend between the hubs. Each pole finger has a proximal end connected to its respective hub, and an axially opposite distal end. The first and second pole fingers circumferentially alternate about the axis, and each pole finger has a respective radially inner surface defining a cavity that extends axially from the distal end to a cavity terminus. Relative to each pole finger, at a respective axial position between the distal end and the cavity terminus the radial distance between the axis and the radially inner surface is substantially greater inside of the cavity than outside of the cavity.

Abstract: A rotor arrangement for an electric machine comprises a rotor shaft and a rotor segment coupled to the rotor shaft. The rotor segment includes a main body and a collar integral with the main body. The collar includes an outer peripheral groove adjacent to the main body portion of the rotor segment. The rotor arrangement further includes a cooling fan that has a center opening defined by an inner perimeter. The center opening of the fan is configured to slidably engage the collar and is adjustable between an insertion diameter and a locking diameter. When the center opening is at the locking diameter, at least a portion of the inner perimeter of the fan extends into the outer peripheral groove in the collar such that the fan is retained on the rotor segment.

Abstract: A synchronous multipolar brushless machine includes an immobile stator armature and field windings, which are placed concentrically around a shaft and radially inwardly positioned relative to the stator armature, on a power unit carrying disc, so that the field windings and armature windings form a mechanically connected unit which generates an excitation magnetic field, and in which an alternate voltage is generated. The excitation magnetic field is transferred to a rotor via labyrinth shaped first and second air gaps. A multipolar rotating magnetic field is generated around the stator armature while the synchronous machine is operated, thereby magnetizing the rotor. In order to reduce magnetic flux resistance, a ferromagnetic tolerance ring is inserted in each first and second air gap. Alternatively, a ferrofluid is provided in each first and second air gap, which significantly increases the magnetic conductivity.

Abstract: There are provided a process of forming a recess groove having a depth shallower than and a width larger than the notch groove for fracturing at a portion of fracturing and splitting in the permanent magnet; a process of forming the notch groove for fracturing the permanent magnet in a groove bottom of the recess groove formed in the recess-groove forming process; and a process of fracturing and splitting the permanent magnet along the notch groove so as to obtain magnet pieces.

Abstract: A brushless alternator of the present invention includes: a yoke whose inner circumferential surface is radially opposite via an air gap to a rotor revolvably supported by brackets; a stator supported by the brackets, for forming a magnetic circuit along with the rotor and the yoke; a bobbin for engaging with the outer circumferential surface of a thin portion of the yoke; a field coil wound around the bobbin, for producing magnetic flux; and a plate joined to the thin portion, for axially holding the bobbin; wherein the thin portion of the yoke and the other portion thereof are integrally formed in one piece using a single member.

Abstract: An AC alternator for a vehicle has a rotor having a pair of pole cores, and a stator. A plurality of claw magnetic pole parts are formed in the pole cores. A permanent magnet is placed between a pair of the claw magnetic pole parts so as to prevent leakage of magnetic flux through the area between the adjacent claw magnetic pole parts. The stator and the rotor are placed in the AC alternator so that the stator faces the rotor at a spacing of predetermined intervals. Flanges are formed at both sides of each of the claw magnetic pole parts. The presence of the flanges fixes the permanent magnets to the pole cores, and prevents them from moving toward the outer radius direction measured from the rotary shaft of the rotor. In particular, the thickness of each of the flange parts is increased from the front end part to the bottom part thereof.

Abstract: The invention relates to a rotor assembly which is mounted such as to rotate around an axis of rotation (X-X?) and which comprises two magnet wheels with claws (10). The aforementioned magnet wheels are separated by an axial space and are disposed opposite one another. Moreover, each wheel (10) comprises an end shield (11) which is essentially perpendicular to the aforementioned axis (X-X?), and claws (12) extended axially from said end shield (11) towards the other wheel (10). The claws (12) of one wheel (10) are solidly connected to the end shield (11) by respective bases (121) which are separated from one another by peripheral spaces (13). The inventive assembly comprises at least one fan (30) which is positioned on an axial face of the end shield (11) of one of the wheels (10) opposite the other wheel (10), such that the fan (30) axially seals at least part of one of the peripheral spaces (13).

Abstract: A motor in which drive current supplied to a winding is controlled in accordance with a rotational position of a rotor detected from a waveform of an induced voltage between phases. The motor is provided with a stator including 3×n teeth and windings for three phases. A rotor includes a rotor core, an n number of magnets, and an n number of salient poles. The magnets function as one of the magnetic poles, the salient poles function as the other one of the magnetic poles. Each salient pole is spaced apart by a gap from the adjacent ones of the magnets in the circumferential direction. The magnets and gap are arranged inward in the radial direction from the rotor core. An electrical angle between two ends of each magnet is set to be smaller than an electrical angle between two ends of each salient pole.

Abstract: A rotor includes a rotating shaft and a pair of first and second pole cores fixed on the rotating shaft. Each of the first and second pole cores includes a plurality of magnetic pole claws each having a root portion and a distal end. Each of the magnetic pole claws are configured to have a constant circumferential width at the root portion and taper from the root portion to the distal end. The magnetic pole claws of the first pole core are arranged alternately with those of the second pole core in a circumferential direction of the rotating shaft. Further, at least part of the magnetic pole claws of the first and second pole cores each have at least one chamfered portion formed at a circumferential end of the root portion of the magnetic pole claw so as to extend parallel to an axial direction of the rotating shaft.

Abstract: A small electric motor is disclosed, such as a claw pole motor. An exemplary small electric motor includes a housing, a stator having at least two stator windings, a rotor having a rotational axis, and a flexible conductor foil for the electrical connection of the stator windings. The conductor foil includes winding connection contacts, external connection contacts and conductor paths between the winding connection contacts and the external connection contacts. Taps of the stator windings are electrically contacted with the winding connection contacts of the conductor foil. The conductor foil can be configured as an elongated strip having at least two connection portions which are arranged in spaced-apart relationship with each other and include winding connection contacts.

Abstract: An electric machine includes a stator and a rotor configured to rotate about an axis of rotation in a direction of angular rotation. The rotor includes a first claw-pole segment and an opposing second claw-pole segment. The first claw-pole segment includes a plurality of fingers extending from an end ring. Each finger includes a distal end and a proximal end with the proximal end fixed to the end ring. Each finger also includes an interior side and an exterior side with the exterior side facing the stator. A leading side and a trailing side are defined on each finger by the direction of angular rotation. A chamfer is formed on the exterior trailing side of each finger at the proximal end of the finger.

Abstract: A rotor of alternator has core layer units serially located along axial direction. Each unit has a field coil generating magnetic flux and two rotor cores receiving the flux on respective sides of the coil in axial direction. Each core has a first yoke portion located on inner side of the coil, a second yoke portion extending from the first yoke portion toward the outer side and magnetic poles extending from the second yoke portion in the axial direction. The poles of one core and the poles of the other core in each unit extend toward different axial sides and are alternately arranged in circumferential direction on the outer side of the coil. A ratio of the outer circumferential diameter of the first yoke portions to the rotational diameter of the poles is lower than 0.54.

Abstract: A vehicular brushless AC generator includes: a bobbin disposed surrounding the axial end face of the thick ring portion of the yoke and the outer circumferential surface of the cylindrical portion so that an exciting coil can be wound thereon; a plate extending radially outwardly from an end of the cylindrical portion, for joining the bobbin to the yoke; and a stator disposed outside the rotor retaining an air gap, in which magnetic flux produced by the exciting coil propagates; wherein the bobbin is provided with a thick portion for extending a creeping distance, formed along the outer circumferential edge of the bobbin joined to the yoke.

Abstract: Provided is a Lundell type rotating machine with high efficiency and high output, which has a rigid and magnetically advantageous magnet retention structure. A rotor iron core includes laminated magnetic-pole members mechanically and magnetically coupled to two laminated magnetic end plates, which extend in an axial direction so as to be brought into meshing engagement with each other to constitute a Lundell type rotor iron core, and permanent magnets provided between the magnetic-pole members. The magnetic-pole members are retained in predetermined positions between the magnetic end plates by dovetail grooves of a non-magnetic retention body over substantially the entire lengths. The permanent magnets are held in direct contact with the magnetic-pole members so as to be interposed therebetween. Thus, the magnet retention structure which is mechanically rigid and magnetically highly efficient even when increased in size can be obtained.

Abstract: An automotive dynamoelectric machine that achieves disposing of permanent magnets and thickening of field coil wire by ensuring outlet space for field coil lead wires. In the dynamoelectric machine, trough portions are formed on portions of yoke portions between respective circumferentially adjacent claw-shaped magnetic pole portions. Magnet holders are disposed so as to span over all of the trough portions on a pole core body at a rear end excluding a predetermined trough portion, and permanent magnets are held in each of the magnet holders. A field coil lead wire is led out from the rotor so as to pass through the trough portion over which a magnet holder is not disposed.

Abstract: A method for producing a rotor assembly for a rotating electrical machine, especially an alternator, the rotor assembly including two rotors defining between themselves at least one inter-rotor space suitable for accommodating at least one magnet structure, which includes at least one index mark. The magnet structure is positioned against at least two of the rotors, using the index mark to identify a direction of orientation of the magnetization of the magnet structure.

Abstract: A vehicle alternator has a center rotational axis and includes a substantially round stator having a plurality of coils, each coil being wound a number of times N around the stator. The vehicle alternator includes a rotor having a spool with a field coil wound thereon and having an opposed pair of core segments defining a number of interleaved pole portions P, each segment having a hub radially extending a distance R2 from the center axis, each pole portion having an outer pole face a radial distance R1 from the center axis. The ratio R2/R1 is in a range of 0.60 to 0.63, and N*P is in a range of 50 to 60.

Abstract: A vehicular alternating current generator includes a Lundell rotor and a stator. The Lundell rotor includes a cylindrical portion around which a field coil is wound; plate-shaped first and second end plate portions disposed on both end faces in an axial direction of the cylindrical portion so as to face each other; a plurality of first claw portions extending in parallel with a rotational axis in a direction from the first end plate portion to the second end plate portion; and second claw portions extending in parallel with the rotational axis in a direction from the second end plate portion to the first end plate portion, the second claw portions being disposed circumferentially and alternately relative to the first claw portions. The stator is disposed on an outer periphery of the rotor so as to face the rotor with a small rotational air gap there between.

Abstract: A rotary machine including two coaxial parts, the first part including an intermediate part, an energizing coil, and fingers distributed around the circumference of the intermediate part with a constant finger pitch and directed alternately in opposite directions. The fingers are positioned so as to interlace over part of the coil. The second part includes a permanent magnet and two lateral parts mounted substantially coaxially, the lateral parts being secured to the permanent magnetic part so as to have opposite polarities, the lateral parts including protrusions distributed around the circumference of the lateral parts and arranged in alternation on one and the other of the lateral parts with a protrusion pitch substantially equal to the finger pitch. A control device can be equipped with such a rotary machine.

Abstract: A dynamoelectric machine main body that includes: a housing that is constituted by a rear bracket and a front bracket; a rotor; a stator; and a fan, and a power supply unit that is mounted integrally onto the dynamoelectric machine main body are included, the power supply unit is disposed between the fan and a bottom portion of the rear bracket, and the power supply unit is disposed between the fan and a bottom portion of the rear bracket, and the rear bracket has: air discharge ports that are formed on portions that are positioned radially outside the fan; and air suction ports that have openings nearer to a bottom portion than the power supply unit, and includes a partitioning member for configuring a ventilation channel that extends from the air suction ports to the air discharge ports that is disposed between the power supply unit and the fan.

Abstract: A rotor (24) for a rotary electric machine (20), mainly for the automotive industry, has a front polar wheel (46N) and a rear polar wheel (46S). Each polar wheel (46N, 46S) includes claws (52) extending axially towards the other polar wheel (46N, 46S). Each claw (52) of the polar wheel (46N, 46S) is circumferentially interleaved between two claws (52) of the other polar wheel (46N, 46S). At least two interpolar gaps (62) are provided between the side faces (60) opposite two consecutive claws (52), and at least two members (68) defining a magnetic barrier are provided in two interpolar gaps (62) associated on either side of a predetermined claw (52D). The front longitudinal ends (72) of the two members (68) are connected by a connector (82) in order to define an open chain (80).

Abstract: The invention relates to a device for assembling, by screwing, a drive member, such as a drive pulley, with a shaft intended to be coupled to the rotor of a rotating electrical machine, the device including an additional, welded connection. According to the invention, this method of producing the assembly device is characterized in that the drive member screwed onto its shaft in the vertical position is welded from below. The invention can be used for rotating electrical machines, such as an alternator or a starter-alternator of a motor vehicle.

Abstract: A method for generating and controlling power by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of the PMM, comprises the steps of: rotating the PM rotor at a velocity sufficient to develop a high frequency alternating current (HFAC) power output from the stator; transforming the HFAC output to produce a desired non-HFAC power output; sensing desired power output parameters; generating a control signal responsive to the sensed parameters; and applying the control signal to the magnetic flux diverter circuit to control the desired power output.

Abstract: An alternator for a vehicle includes: a rundel-type rotor including a cylindrical portion around which a field coil is wound, a pair of plate-shaped end plate portions which are arranged such that the end plate portions face both end surfaces of the cylindrical portion in the axial direction in an opposed manner, first claw portions which extend parallel to a rotary axis from one end plate portion, and second claw portions which extend parallel to the rotary axis from the other end plate portion, and a stator which is arranged on an outer peripheral side of the rotor with a rotary gap therebetween so as to face the rotor in an opposed manner, and has a laminated core on which an armature coil is wound. The between claw magnetic poles of the first and second claw portions is set to a optimum gap range to maximize output current.

Abstract: Dynamoelectric machine having holding grooves recessed into yoke portions with openings on respective facing portions of inner wall surfaces of trough portions, at axially inner ends of the yoke portions, having axial groove directions, and an end surface in a groove length direction constitutes a stopping surface. Magnet material holders are disposed spanning the trough portions radially inside inner circumferential surfaces near tip ends of claw-shaped magnetic pole portions, fitted from axially inside into each holding groove, are recessed to face each other on the trough portions restricting circumferential and radial motion by inner wall surfaces of the holding grooves and axially outward movement restricted by the stopping surface.

Abstract: A disk drive device includes: a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a core that is fixed to the base and includes a circular portion and S salient poles (where S is a natural number greater than or equal to 3) extending from the circular portion in the diameter direction; a three-phase coil that is formed by being wound around each of the S salient poles; and a magnet that is fixed to the hub and faces the S salient poles in the diameter direction, and that is provided with P driving magnetic poles in the circumferential direction (where P is a natural number greater than or equal to 2).

Abstract: A rotor (1) for a rotary electrical machine, which includes two pole wheels (2) having a series of axial claw poles (20) of a trapezoidal overall shape which extend axially from the extreme radial outer edge of the pole wheel (2a) toward the other pole wheel (2b), such that each pole claw (20a, 20b) of a pole wheel (2a, 2b) is situated in the space which exists between two consecutive claw poles (20a) of the other pole wheel (2b). The rotor (1) includes magnetic assemblies (3) in the interpole space (22). An assembly (3) is composed of at least one magnetic member (31) and at least one magnet (30), received in a groove (21) made in each of the facing edge faces of the two adjacent claw poles (20a, 20b). This has the advantage of increasing the cross-section for the flow of rotor flux towards the stator, and of enabling the same milling cutter as has already been used to make the grooves in the edge faces of the claw poles.

Abstract: An alternator for motor vehicles, having a rotor, whose poles are developed as claw-poles. In order to improve the design options of the stator of the machine, its multiphase winding is developed as a fractional-slot winding, whereby, in particular with respect to the selection of the number of slots, many additional options are created, by which both the production is made clearly simpler and less costly and, at the same time, the electrical properties are able to be improved.

Abstract: The present invention provides a dynamoelectric machine that enables heat that is generated in a permanent magnet to be transmitted to a fan and be radiated from the fan effectively, that suppresses occurrences of damage to the fan that result from centrifugal forces that act on the permanent magnet, and that also enables the fan to be prepared easily and inexpensively.

Abstract: An automotive dynamoelectric machine that achieves disposing of permanent magnets and thickening of field coil wire by disposing trough portions on yoke portions and disposing magnet holders that hold the permanent magnets so as to span the trough portions to ensure outlet space for field coil lead wires. In the dynamoelectric machine, trough portions are formed on respective portions of yoke portions between circumferentially adjacent claw-shaped magnetic pole portions, a magnet holder is disposed so as to span over a trough portion, and a permanent magnet is held by the magnet holder. A lead wire is led out of a rotor from a field coil so as to pass through a space that is bounded by the trough portion and the magnet holder.

Abstract: A bobbin is mounted to a rotor such that a rotation arresting portion is housed in a space that is formed by a rotation arresting portion housing recess portion and a stepped portion so as to restrict circumferential movement, and a permanent magnet is made into a quadrangular prism that has a rectangular bottom surface, and is held by a magnet holding seat by placing a bottom surface on an upper surface of a magnet holding portion, and fixing to the magnet holding seat a cover that is mounted from radially outside to restrict circumferential, axial, and radial movement.

Abstract: A brushless alternator of the present invention includes: a yoke whose inner circumferential surface is radially opposite via an air gap to a rotor revolvably supported by brackets; a stat or supported by the brackets, for forming a magnetic circuit along with the rotor and the yoke; a bobbin for engaging with the outer circumferential surface of a thin portion of the yoke; a field coil wound around the bobbin, for producing magnetic flux; and a plate joined to the thin portion, for axially holding the bobbin; wherein the thin portion of the yoke and the other portion thereof are integrally formed in one piece using a single member.

Abstract: A dynamoelectric machine that can suppress increases in rotor inertia to extend belt service life and increase field magnetomotive force to increase output. In the dynamoelectric machine, first and second magnetic guidance members are fitted into first and second holding grooves that are disposed so as to extend axially on facing portions of first and second trough portions radially outside inner wall surfaces, and are disposed so as to span over first and second trough portions. First and second permanent magnets that are magnetically oriented in a reverse direction to a magnetic field that originates from a field coil are fitted into and held by interfitting grooves of the first and second magnetic guidance members so as to face inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions so as to have a predetermined clearance.

Abstract: A controlling apparatus-integrated dynamoelectric machine Includes: a metal housing that includes a front bracket and a rear bracket; a rotor that is rotatably disposed inside the housing by being fixed to a shaft that is rotatably supported by the front bracket and the rear bracket; a stator that includes: a cylindrical stator core that is disposed so as to be held between the front bracket and the rear bracket so as to surround the rotor; and a stator winding that is mounted to the stator core; and a controlling apparatus that includes: a direct-current alternating-current power interconverting circuit portion that passes electric current to the stator winding; and a controlling circuit portion that controls the direct-current alternating-current power interconverting circuit portion, the controlling apparatus being disposed inside the rear bracket.

Abstract: An apparatus is provided having a cylindrical stator and a rotor that is spaced from a stator to define an annular primary air gap that receives AC flux from the stator. The rotor has a plurality of longitudinal pole portions disposed parallel to the axis of rotation and alternating in polarity around a circumference of the rotor. Each longitudinal pole portion includes portions of permanent magnet (PM) material and at least one of the longitudinal pole portions has a first end and an opposing second end and a side magnet is disposed adjacent the first end and a side pole is disposed adjacent the second end.

Abstract: A rotor for an electric rotary machine and a method of manufacturing the same are disclosed wherein none of permanent magnets is fixed to a magnetic supporting segment of a magnet support ring in advance and each permanent magnet is assembled separately of the magnet support ring. Prior to the assembling of the permanent magnets, the magnet support ring is preliminarily located on claw-shaped magnetic poles at inner peripheral sides thereof under a state combined with a pair of field iron cores, after which the permanent magnets are inserted to magnet insertion spaces in longitudinal directions. The rotor includes positioning and restricting means for precluding the occurrence of positional displacement of each permanent magnet with respect to each magnet supporting segment of the magnet support ring.

Abstract: A rotor (10) for a rotary electric machine which comprises: two field spiders (12) each of which runs more or less radially with respect to the main axis of the rotor (10) and comprises a series of axial arms (20) in which each arm (20) runs axially inwards from the associated field spider (12), towards the other field spider (12) in such a way that each arm (20) of a field spider (12) lies in the space there is between two consecutive arms (20) of the other field spider (12); and at least one magnetic element (24) the main orientation of which is longitudinal position transversely between two adjacent arms (20) belonging one to each field spider (12) and which comprises at least one magnet (28), characterized in that the magnetic element (24) comprises at least one support shim (30) made of a non-magnetic material and mounted on a transverse end face of the magnet (28), and means of connecting the shim (30) to the magnet (28).

Abstract: The method of manufacturing a rotor core of an electric rotating machine includes a preliminary shaping step of forming a boss section having a cylindrical portion extending in an axial direction, a disk section extending from one end portion of the boss section in a radical direction and preliminary shape portions of claw sections extending from a periphery of the disk section in the axial direction, a boring step of forming an axial hole extending through the boss section in the axial direction, an ironing step of forming the claw sections, and a sizing step to achieve a necessary thickness and flatness of the boss section. The ironing step is performed with a mandrel having an interference with the axial hole smaller than a boring punch being inserted into the axial hole after completion of the boring step.

Abstract: An electrical rotating machine rotor, in particular for a motor vehicle, comprising a central shaft, an annular core coaxial with the shaft and two polar wheels which are axially arranged on either side of the core, of the type wherein the shaft includes at least one drive section which is axially force-fitted into a fixing bore of at least one component of the rotor so as to secure in rotation at least one of the two polar wheels of the rotor to the shaft, an intermediate sleeve being radially interposed between each polar wheel and the central shaft, and on which sleeve is mounted said polar wheel. The invention also concerns a method for making such a rotor.

Abstract: An alternator includes a stator assembly and a rotor assembly. The rotor assembly includes a rotor core having a first core portion and a second core portion. The rotor core is processed by cementation, so that the first core portion has carbon content that gradually decreases from the outer surface toward the central line of the rotor core till reaching a predetermined carbon content. The second core portion has carbon content lower than that of the first core portion. With these arrangements, the alternator can reduce turn-on speed and increase outputs. A method of manufacturing the non-homogenous rotor core of the alternator is also provided.

Abstract: An automotive alternator includes a magnet holder that is composed of first and second magnet holder pieces. Each of the first and second magnet holder pieces is made of a nonmagnetic metal plate to have a one-piece structure. Each of the first and second magnet holder pieces includes a plurality of receiving portions, each of which receives a permanent magnet, and a plurality of connecting portions. All the receiving portions of the first magnet holder piece have the same orientation. Each of the connecting portions of the first magnet holder piece connects a circumferentially-adjacent pair of the receiving portions of the first magnet holder piece. All the receiving portions of the second magnet holder piece have the same orientation. Each of the connecting portions of the second magnet holder piece connects a circumferentially-adjacent pair of the receiving portions of the second magnet holder piece.

Abstract: A rotor for an electrical machine that comprises two parallel magnet wheels, each of which comprises axial teeth so that each tooth on a wheel is situated in the space existing between two consecutive teeth on the other wheel, and that comprises magnetic elements, each arranged between two adjacent teeth and partly received in a groove produced in each of the opposite lateral faces of the two adjacent teeth. In one embodiment, each of the two adjacent teeth comprises one groove at a maximum, which emerges at the base of the first tooth.

Abstract: The electromechanical transducer (2) includes a rotor (4) and two coil (6, 8), the rotor being formed of first, second and third parts (10, 11, 12) made of magnetic material with respectively first, second and third superposed central zones (14, 15, 16), a first, axially polarized, bipolar magnet (18) being arranged between the first and second central zones and a second bipolar magnet (20) axially polarized in an opposite direction to that of the first magnet being arranged between the second and third central zones.

Abstract: An interfitting groove is disposed in a bottom portion of a trough portion so as to have a groove direction that is axial and so as to extend axially outward from axially inside, and a rotation arresting portion housing recess portion is recessed into an axially inner opening edge portion of the interfitting groove on a first yoke portion. A magnet holding seat that holds a permanent magnet is disposed in the trough portion by an interfitting portion being fitted into the interfitting groove such that radial movement is restricted. A rotation arresting portion that is disposed so as to project axially outward from a flange portion of the bobbin is housed inside a space that is constituted by the rotation arresting portion housing recess portion and an external shape reduced portion that extends axially inward from the interfitting groove such that rotation of the bobbin around the shaft is restricted.

Abstract: The invention relates to an electrical machine (10), especially a three-phase generator for vehicles. The electrical machine (10) comprises a stator (16) and a rotor (20). The rotor (20) comprises a first and a second claw pole (22, 23) from which claw pole fingers (24) respectively extend in the axial direction from claw pole roots (60). A centring point (74) for a tool is located on a rear radius (72) of the claw pole roots (60).

Abstract: A dynamoelectric machine includes first and second magnet seat portions disposed to project from portions of first and second yoke portions that face respective inner circumferential surfaces near tip ends of second and first claw-shaped magnetic pole portions, and magnet housing portions disposed integrally to extend axially outward from outer circumferential portions of a pair of flange portions of a bobbin, extend near the first and second yoke portions that face the inner circumferential surfaces near the tip ends of the first and second claw-shaped magnetic pole portions, and be held by the first and second magnet seat portions.