Abstract: A magnet-mounting member for holding permanent magnets against side faces of each claw-shaped magnetic pole has pairs of extreme-end and basal-end hooking tabs for preventing displacement of the permanent magnets in either a basal-end or extreme-end direction. The magnet-mounting member is configured such that a function of the basal-end hooking tabs to prevent displacement of the permanent magnets can be disabled by deforming the basal-end hooking tabs. When the magnet-mounting member is forced onto the claw-shaped magnetic pole, the basal-end hooking tabs go into contact with the permanent magnets and deform outward, whereby the magnet-retaining function of the basal-end hooking tabs is disabled. When the magnet-mounting member has been fully pushed onto the claw-shaped magnetic pole, the basal-end hooking tabs resume an original shape to prevent the permanent magnets from being displaced in either direction.

Abstract: A Lundell type rotor core with a pair of side cores and a magnetic-pole cylindrical portion has a structure in which the magnetic-pole cylindrical portion is mated between both the side cores (also referred to as “pole cores”) in a radial direction at an outside of a field coil wound on a boss portion in the side cores. The magnetic-pole cylindrical portion is made of plural magnetic steel sheets laminated in the axis direction, and is easily deformed rather than both the side cores. The easy deformation characteristic of the magnetic-pole cylindrical portion prevents generation of a gap during the assembling process of the magnetic-pole cylindrical portion and the side cores. Without paying strict dimension control of the components for the rotor core, it is easily possible to prevent any generation of a gap between the side cores and the magnetic-pole cylindrical portion while assembling. It is thereby possible to prevent a deterioration of a magnetic flux flowing in the rotor core.

Abstract: Provided are a motor and a washing machine using the motor. The motor has a stator, a rotor, a rotor frame, a permanent magnet, and a comb polarizing ring. The rotor rotates against the stator. The permanent magnet is installed on the rotor frame and has protrusions with alternating North and South polarities. The comb polarizing ring includes a plurality of teeth disposed between the protrusions of the permanent magnet, and is formed of a material with a magnetism that is weaker than a magnetism of the protrusions.

Abstract: The rotating electric machine has a stator coil wound around a stator, a magnetic pole and a signal rotor fixed to a rotor, and a detection stator, disposed opposite to the signal rotor, for detecting the rotational position of the rotor, characterized by further comprising an adjuster for adjusting the position of the signal rotor or the detection stator by supplying a direct current to a predetermined phase of the stator coil and then a direct current to a different phase from the predetermined phase to rotate the rotor by a predetermined angle or more and constrain the rotor.

Abstract: A tandem rotary electric machine, to be applicable to various types of mobile bodies such as vehicles, is equipped with a primary rotary electric machine and a secondary rotary electric machine arranged in tandem mechanism. In the tandem rotary electric machine, heat energy generated by positive diodes and negative diodes forming one or more rectifier devices is dissipated to a stator core of the secondary rotary electric machine. The stator core of the secondary rotary electric machine acts as a heat sink through the housing. The stator core of the secondary rotary electric machine has a less frequency use, and a large size and a large weight than those of the primary rotary electric machine of high frequent and normal is used as a heat sink in order to prevent the temperature rise of the positive diode and the negative diode of the rectifier devices.

Abstract: A rotary electric apparatus comprises a rotor including a first and second rotor members, a stator including a first stator and second stator members with armature coils to which armature current is supplied for synchronous rotation. The first and second rotor members are formed into a skewed type. Control means for controlling amounts ?1 and ?2 of field magnetic flux generated by the first and second rotor members, respectively, such that the amounts ?1 and ?2 differ from each other to reduce a difference between a maximum amplitude of a predetermined-order harmonic component F1 of an electromagnetic force caused by a pair of the first rotor member and the first stator member and a maximum amplitude of the predetermined-order harmonic component F2 of an electromagnetic force caused by a further pair of the second rotor member and the second stator member is reduced.

Abstract: A plate member includes a frame portion (51) provided in a state of coupling both one end portion and other end portion and mounting terminal portions (44) protruding from the one end portion and the other end portion of said frame portion (51) to approach each other, from which a PCB joint portions (46) to be a mounting portion to a PCB are formed by cutting and bending when manufacturing a magnetic element. Further, a winding number adjustment means (41), which is capable of selecting joint portions with ends of a coil and adjusting the winding number of the coil in accordance with the selection, protrudes from the one end portion and the other end portion to approach each other farther as compared to the mounting terminal portions (44).

Abstract: Drum type washing machine including a tub of plastic having a wall for holding washing water therein and mounting a driving part thereon, a drum rotatably arranged inside of the tub, a shaft passed through the tub and connected to the drum for transmission of a driving power from a motor to the drum, at least one bearing for supporting the shaft, a bearing housing having a sleeve form of bearing supporting part, and a stator fastening part extended in a radial direction from the bearing supporting part, wherein both of the bearing supporting part and the stator fastening part are inserted in a tub rear wall, while stator fastening holes in the stator fastening part are exposed, a rotor engaged to a rear end part of the shaft to form the motor together with the stator, and the stator mounted on the stator fastening part of the bearing housing with fastening members on an inner side of the rotor to form the motor together with the rotor, wherein the stator includes an annular helical type core having multiple l

Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.

Abstract: An electric generator 10 of the present invention comprises a permanent magnet 14, a coil 30, a yoke 20, and attracted means 19 composed of a plurality of attracted pieces 18 which are arranged radially around the rotation axis 12 and are magnetized by the permanent magnet 14. The permanent magnet 14, the coil 30, the yoke 20, and the attracted means 19 are mounted on the rotation axis 12 and the attracted pieces 18 that constitute the attracted means 19 are each placed in positions that correspond to positions that bisect the spaces between the metal pieces that constitute the yoke 20, so that the cogging torque exerted the rotation axis 12 is reduced.

Abstract: An internal cooling fan assembly for use with a claw-pole segment of a rotor assembly is provided that maximizes air flow while providing a reduced sound signature. The fan assembly includes a base portion that contacts the claw-pole segment when the fan assembly is mounted to the claw-pole segment. The fan assembly also includes a number of blades extending from the base portion such that the blades project outward from a plane normal to the rotor. The plurality of blades have a geometry that aligns with roots of the claw-pole segment. In addition, a first blade of the number of blades is of a first configuration and a second blade of the number of blades is of a second configuration different from the first configuration.

Abstract: A Lundell type rotor of an alternator has a rotor core disposed on an outer side of a field coil in a radial direction of the rotor, and a non-magnetic claw pole joint ring. The rotor core has claw poles disposed along a circumferential direction of the rotor at predetermined intervals. Each claw pole extends along an axial direction of the rotor and is magnetized in response to an electric current supplied to the field coil. The joint ring is formed by spirally bending a long band bar in a coil shape and has turn portions disposed along the axial direction. Each turn portion of the joint ring has no seams and is attached to inner side surfaces of the claw poles in the radial direction.

Abstract: A field coil is housed inside a coil housing space of a pole core, and an annular body that is made of an insulating resin is fixed to a portion of a shaft that projects outward at a first end of the pole core. A pair of slip rings are fixed to the annular body so as to be separated axially, and a pair of connecting terminals are disposed on the annular body such that first ends are respectively connected to the pair of slip rings and second ends project radially outward from a flange portion of the annular body. In addition, a coil winding start end and winding finish end of the field coil are led out through a valley portion between first claw-shaped magnetic pole portions, and are respectively connected to projecting portions of the connecting terminals.

Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.

Abstract: Disclosed herein is an apparatus that relates to a bobbin of a dynamoelectric machine. The bobbin comprising, a central hub with radial surfaces on axial ends thereof receivable of end caps attachable to the radial surfaces. The central hub is receivable of a wire winding, and at least one radial protrusion extending radially outwardly from one of the radial surfaces is receivable of a wrapped end of the wire winding.

Abstract: A vehicular starting and charging rotary electric machine includes a rotor, a stator, brackets, a brush, and a rotation detection sensor. The rotor has a field winding. The stator has a stator winding. The brackets supports the rotor and the stator. One end of the brush is brought into contact with the rotor to supply field current to the field winding of the rotor. The rotation detecting sensor is arranged coaxially with a rotating shaft of the rotor, for detecting a state of the rotor and functioning as a motor or a generator. The magnetic pole position detecting sensor is integrally fixed to the bracket.

Abstract: In a vehicular alternator having a permanent magnet protection mechanism, each magnet holder of a non-magnetic characteristic if a rectangle prism shape accommodates each permanent magnet disposed between adjacent claw poles. The magnet holders are connected in a ring shape along a circumferential direction of the alternator by using each connecting plate part which extends from each magnet holder in approximate circumferential direction toward an inner side of and at a front tip part of each claw pole. The connecting plate parts and the magnet holders are made from a non-magnetic plate by cutting and bending. Making the surfaces and the connecting plate part of each magnet holder from the non-magnetic plate by cutting and bending provides a high accuracy magnet position in the alternator with low manufacturing cost.

Abstract: A claw-pole rotor for an electrical machine, in particular a rotary current generator, having two pole wheels (26, 27), which each carry claw poles (28 and 29, respectively), which each originate in a plate region (50) and have a pole root (53), and on a circumference of the claw-pole rotor (20), claw poles (28, 29) of the pole wheels (26, 27) are located in alternation, and located between the claw poles or interstices (90), and a claw pole (28, 29) has a radially outward-oriented cylindrical-jacketlike surface (43), by which a pivot axis (65) is defined, and a chamfer (68) extends on the one hand in a circumferential direction and on the other in an edge direction of a claw pole (28 and 29, respectively), wherein the chamfer (68) has a center portion m in the edge direction that intersects a transition plane (59) which demarcates the pole root (53) and the freely projecting part of the claw pole (28 and 29, respectively), and the center portion m amounts to 8/10 of the length, oriented in the edge direction

Abstract: A vehicle brushless alternator includes a magnetic field part having a field coil portion fixed to a rear frame, and pole cores formed with claw-shaped magnetic poles and constituting a rotary part. The rotary part includes a first claw-shaped magnetic pole section fixed to a shaft, and a second claw-shaped magnetic pole section connected to the first claw-shaped magnetic pole section via a nonmagnetic member. The second claw-shaped magnetic pole section is rotatably supported on the rear frame via a bearing. A boss forms part of a magnetic path of magnetic flux on a radial inward side of the first and second claw-shaped magnetic pole sections and is formed by a portion of the magnetic field part fixed to the rear frame.

Abstract: A method of manufacturing a rotor for a rotating electrical machine includes the steps of: preparing a first and a second pole core, a rotary shaft, and a field coil; press-fitting the rotary shaft into a through-hole of the first pole core so that the axes of the rotary shaft and the through-hole coincide with each other; mounting the field coil on one of the first and second pole cores; opposing the first and second pole cores to each other so that the axes of the through-holes thereof are in alignment with each other and contact surfaces thereof face each other with a maximum parallelism therebetween; press-fitting the second pole core onto the rotary shaft so that the contact surfaces of the first and second pole cores maximally contact with each other and the axis of the rotary shaft coincides with the axes of the through-holes of the pole cores.

Abstract: A rotor for a tandem type alternator and a tandem type alternator having such a rotor are disclosed. The rotor comprises front and rear Lundell-type rotor cores, carried on a rotary shaft adjacent to each other, which include front and rear rotor coils, respectively, and front and rear claw-shaped pole portions surrounding the front and rear rotor coils, respectively. The rear Lundell-type rotor core has a rear end face including a convexed portion, formed around the rotary shaft, in which a large diameter stepped portion of the rotary shaft and a plurality of relay terminals associated therewith are accommodated in an area close proximity to the rear Lundell-type rotor core, enabling an axial length of the rotary shaft between front and rear bearings to be shortened to increase the number of allowable maximum revolutions of the rotor by that extent.

Abstract: In a Lundell type rotor core of a rotor in a vehicular AC generator, each interposing magnet is supported at a base part of each claw-shaped magnetic pole part in an axial direction of the rotor. This configuration prevents the transmission of deformation at a front end part of each claw-shaped magnetic pole part to the interposing magnet during rotation of the rotor at high rotation speed.

Abstract: An alternator has a rotor and a stator. The stator has a cylindrical armature core wound with an armature wiring. The core has slots disposed along a circumferential direction of the core so as to surround the rotor. Each slot extends in an axial direction of the core and has accommodation regions aligned along a radial direction of the core. Each region receives the wiring. The regions of each slot includes an innermost region and an outermost region, respectively, disposed on both ends of the slot in the radial direction. The wiring has end portions, respectively, drawn out from the outermost regions of different slots, and the wiring has a return portion of which both ends are drawn out from the innermost regions of two different slots.

Abstract: In a tandem AC generator for a vehicle having dual armature core-Lundel type field core pairs placed in series, an intermediate ring as a cylindrical spacer is placed between the dual armature cores. One armature core, the intermediate ring, and the other armature core are pressed and tightly fastened to each other in the direction of a rotary shaft by front and rear housings by a through bolt. A circumference wall part of the front housing accommodates one armature core and the intermediate ring completely and further accommodates a part of an outer circumference surface of the other armature core. This simple construction of the tandem AC generator provides improved and superior vibration proof.

Abstract: According to the present invention, an alternator includes a rotor, a stator, and at least one cooling fan. The rotor includes a rotary shaft, a field core, and a field coil. The field coil has first and second ends that are opposite to each other in an axial direction of the rotary shaft. The stator includes an armature core and an armature coil. The armature core has first and second ends that are opposite to each other in the axial direction. The first end of the armature core is closer to the first end than the second end of the field coil. An axial distance between the first and second ends of the field coil is less than that between the first and second ends of the armature core. The first end of the field coil protrudes outward from the first end of the armature core in the axial direction.

Abstract: Disclosed herein is a rotor assembly for an electric machine. The rotor assembly includes a shaft, at least one slip ring, a field coil, a first pole segment, and a wire retainer. The at least one slip ring is attached to the shaft. The field coil surrounds the shaft such that the field coil has one or more wire sections in electrical communication with the at least one slip ring. The first pole segment rotates with the shaft. And, the wire retainer is disposed between the field coil and the at least one slip ring such that the wire retainer includes at least one opening, disposed along an outer periphery of the pole segment, for routing the one or more wire sections.

Abstract: Each of first and second pole cores has a boss portion, six core flange portions; and six claw-shaped magnetic pole portions, the first and second pole cores being disposed such that the claw-shaped magnetic pole portions face each other so as to intermesh and leading end surfaces of the boss portions are abutted with each other. The boss portions include coil mount portions in which cross-sectional shapes that are perpendicular to the central axis are hexagons; and abutted portions that have circular cross sections and that are disposed so as to protrude from leading ends of the coil mount portions. Radially-inner surfaces of the claw-shaped magnetic pole portions face side surfaces of the coil mount portions and are parallel to the side surfaces of the coil mount portions at the cross sections that are perpendicular to the central axis.

Abstract: The apparatus disclosed herein relates to a pole piece for an electric machine comprising, a pole piece with a finger support structure, a plurality of fingers having an axial component of extension relative to the finger support structure, a coil contact surface and at least one of a protrusion or a depression having an axial component of extension relative to the coil contact surface. Further disclosed is a method that relates to assembling a coil to pole pieces comprising, axially compressing a coil between coil contact surfaces of a pair of opposing pole pieces and deforming the coil axially and without radial deformation with at least one of protrusions and depressions in the coil contact surfaces of the pole pieces thereby rotationally fixing the coil to the pole pieces.

Abstract: A field coil is housed inside a coil housing space of a pole core, and an annular body that is made of an insulating resin is fixed to a portion of a shaft that projects outward at a first end of the pole core. A pair of slip rings are fixed to the annular body so as to be separated axially, and a pair of connecting terminals are disposed on the annular body such that first ends are respectively connected to the pair of slip rings and second ends project radially outward from a flange portion of the annular body. In addition, a coil winding start end and winding finish end of the field coil are led out through a valley portion between first claw-shaped magnetic pole portions, and are respectively connected to projecting portions of the connecting terminals.

Abstract: According to the invention, there is provided a rotor for a rotating electrical machine which includes a rotary shaft, a pair of first and second pole cores fixed on the rotary shaft, a plurality of permanent magnets, and a magnet holder holding the permanent magnets. The magnet holder is made of a non-magnetic metal and has a plurality of holding portions and a plurality of connecting portions. Each of the holding portions is interposed between circumferentially adjacent two of claws of the first and second pole cores, so as to hold a corresponding one of the permanent magnets between the adjacent two claws. Each of the connecting portions circumferentially extends, through the radially inner side of a distal end portion of one of the claws of the first and second pole cores, to connect end portions of adjacent two of the holding portions which circumferentially bracket the distal end portion.

Abstract: According to the invention, a tandem alternator includes a rotary shaft, a first and a second power generation unit that are arranged in tandem in the axial direction of the rotary shaft, a housing, a slip ring-brush mechanism provided around a rear end portion of the rotary shaft, and a first and a second rectifier that are respectively fixed to a front and a rear end face of the housing, and a controller. The controller is electrically connected between the first rectifier and the slip ring-brush mechanism to control, at least, supply of the first field current to the first field winding. The controller is configured to form a freewheeling circuit when the first field current is interrupted. The controller is fixed to the rear end face of the housing to minimize the distance from the controller to the slip ring-brush mechanism, thereby minimizing resistance loss of the freewheeling circuit.

Abstract: According to the invention, a tandem alternator includes a rotary shaft, a first and a second power generation unit arranged in tandem in the axial direction of the rotary shaft, a housing accommodating the power generation units and having a plurality of air holes formed through a front end wall thereof, a pulley provided on a front end portion of the rotary shaft which protrudes outside from the first end wall of the housing, and a first and a second rectifier working to respectively rectify AC powers output from the first and second power generation units. The first rectifier is so fixed to the outer surface of the front end wall of the housing as to be located on the radially outside of the pulley and cover only part of the air holes. The second rectifier is fixed to the outer surface of a rear end wall of the housing.

Abstract: According to the invention, a tandem alternator includes a rotary shaft, a first and a second field arranged in tandem on the rotary shaft, and a first and a second armature arranged in tandem in the axial direction of the rotary shaft. The first armature is provided on an outer periphery of the first field to constitute a first power generation unit. The second armature is provided on an outer periphery of the second field to constitute a second power generation unit. The first and second fields are arranged to abut each other in the axial direction of the rotary shaft, so as to minimize the axial length of the alternator. The first and second fields are configured to respectively create a first and a second magnetomotive force whose directions are opposite to each other, so as to minimize magnetic leakage between the first and second power generation units.

Abstract: A brush holder in a tandem vehicle alternator for a vehicle is composed mainly of a primary brush holder and a secondary brush holder accommodating plural brushes, respectively. The primary and secondary brush holders are independently formed. During a step of producing a brush assembly and of mounting the brush assembly on the tandem vehicle alternator, both of the primary and secondary brush holders are integrated into a single brush holder and tightly fastened by welding using a connection metal member.

Abstract: A tandem vehicle alternator has dual electrical power generation units. Each generation unit has a Lundel type rotor core and a stator coil. The Lundel type rotor cores are arranged in a tandem arrangement in the vehicle alternator. Each stator coil is composed of sequential segment joining type stator coils. A center position of an inside disk part in a pair of disk parts, placed at the outside of the rotor core, is positioned within a width of an armature iron core as a stator core. This configuration enlarges a gap between inner coil ends faced to each other in the adjacent stator coils at the inside in the axis direction, cools those inner coil ends, and reduces a mutual inductance generated between the inner coil ends. The feature improves the output of the vehicle alternator and enhances the independent control of each generation unit.

Abstract: An electromagnetic retarder system is disclosed. In one embodiment, the retarder system comprises: a shaft; a coil statically disposed on the shaft and having a hollow cylindrical shape; a yoke statically disposed on the shaft, the yoke having a first cylindrical surface and a second cylindrical surface, the second cylindrical surface disposed coaxial with said coil; at least one claw pole rotor mounted on the shaft, the at least one claw pole rotor formed of magnetic half wheels that taper into claws; and an induction drum disposed coaxial with the shaft and mounted so as to encompass the coil, the yoke and the at least one rotor.

Abstract: Methods, systems, and articles of manufacture for fastening internal cooling fans to claw-pole segments are provided. A claw-pole segment suitable for use in a rotor of an electro-mechanical machine is formed. The claw-pole segment may include a base portion, at least one claw pole projecting axially from the base in a first direction, and at least one protrusion projecting axially from the base in a second direction opposite the first direction. A fan assembly that attaches to the claw-pole segment is also formed. The fan assembly may include at least one opening for receiving the at least one protrusion, and may be formed with varying configurations to affect the frequency response of the fan. The portion of the at least one protrusion extends through and beyond the opening of the fan assembly when the fan assembly is mounted on the claw-pole segment and expands in response to an application of an axial load, to secure the fan assembly to the claw-pole segment.

Abstract: Reinforcing body retainers are formed on an inner peripheral surface near a tip and near a root of first and second claw-shaped magnetic poles. Reinforcing bodies have a trapezoidal base portion and a pair of wing portions formed on two sides of the base portion, and slits are formed completely across a width direction of the base portion at a central portion in a height direction of the trapezoidal shape of the base portion so as to be offset toward a base of the trapezoidal shape. The reinforcing bodies are disposed so as to contact the inner peripheral surfaces of the first and second claw-shaped magnetic poles with a magnet housed and supported in each of the wing portions, and a D ring is fitted into the slits of the reinforcing bodies.

Abstract: A vehicle alternator has a rotor having plural claw poles and a stator placed at the outer circumference of the surface of the rotor. Plural grooves are formed in a specified rear area on a surface of each claw pole faced to the stator. The specified rear area is an approximate rear half area on the surface of the claw pole along a rotating direction of the rotor. The grooves are formed in parallel to each other. Each groove has one or a combination of a U-letter shaped groove having a circulation-arc shaped bottom, a rectangle shaped groove having a rectangle shaped bottom, and the like. The configuration of each claw pole ensures the reduction of generating an eddy current on the surface of each claw pole and thereby prevents a reduction of output power of the vehicle alternator.

Abstract: The present invention relates to a power generation controller of a vehicle power generator, which includes: voltage detection means for sampling a voltage of a battery based on a reference clock signal; duty range setting means for setting a range for an ON/OFF ratio of a field switching element from the rotation speed of the power generator; control duty computation means for computing the ON/OFF ratio of the field switching element based on thus set duty range from a deviation between a power generation target voltage and voltage information as a result of sampling; and field PWM drive means for controlling the ON/OFF switching operation of the field switching element with an interval based on the reference clock signal from the computed ON/OFF ratio.

Abstract: The present invention provides a dynamoelectric rotor enabling electromagnetic noise to be reduced by linking a facing tip end portion and root end portion of adjacent claw-shaped magnetic poles by a linking member and placing a field winding in contact with an inner peripheral surface of the claw-shaped magnetic poles in an electrically-insulated state so as to suppress vibration of the claw-shaped magnetic poles effectively. In the present invention, a tip end portion and a root end portion of adjacent claw-shaped magnetic poles are linked by a linking structure, and a field winding is wound onto a boss portion so as to have a larger diameter than a root inside diameter of the claw-shaped magnetic poles and is placed in contact with an inner peripheral surface of at least one of the claw-shaped magnetic poles with an insulating member interposed.

Abstract: Claw-shaped magnetic poles are alternately disposed along the rotation plane of a rotor of an electric rotating machine, and a permanent magnet is disposed between the claw-shaped magnetic poles. Surface of the permanent magnet is coated with a coating layer. The coating layer is composed of a anticorrosive material performing sacrificial anticorrosion (metal flake in a coating film rusts prior to a matrix resulting in protection of the matrix) such as inorganic material containing zinc and a film of the anticorrosive material is formed by spraying. Ionization tendency of zinc is larger than that of iron composing the permanent magnet, and the permanent magnet is difficult to be rusted owing to the sacrificial anticorrosion. Consequently, anticorrosion of the permanent magnet disposed between the claw-shaped magnetic poles is improved.

Abstract: The invention proposes a method of making a rotor (12) for a rotary electrical machine, the rotor including a core (14) on which there is formed at least one electrical winding (16) comprising at least one electrically conductive element (18) which is coated with an outer bonding layer (32), of the type in which the winding step is followed by a step of change of state which causes softening of the bonding material to take place and which then causes it to solidify once more, characterized in that the winding of the conductive element (18) is carried out on the convex outer cylindrical wall (40) of a tubular element (42) of the core, and in that, after the said step of change of state, the tubular element (42) is assembled on a core body (44) in such a way as to minimize the temperature gradient in the winding (16) during the step of change of state.

Abstract: The dynamoelectric rotor according to the present invention, includes: a rotor coil; a first pole core body and a second pole core body respectively having: first and second cylindrical portions on which the rotor coil is installed; first and second disk portions; and a plurality of first and second claw-shaped magnetic poles magnetized into North-seeking (N) poles and South-seeking (S) poles; and permanent magnets for reducing magnetic leakage flux between the adjacent claw-shaped magnetic poles, flange portions projecting in a circumferential direction and restricting radial movement of the permanent magnets due to centrifugal force being formed on first and second side surfaces of the claw-shaped magnetic poles, and a groove being formed on the first disk portion of the first pole core body to make the first claw-shaped magnetic poles of the first pole core body displace more than the second claw-shaped magnetic poles of the second pole core body.

Abstract: In an electric rotating machine, a rotor can be manufactured relatively easily at reasonable cost without high working accuracy for pole cores, and a permanent magnet can be assembled without impairing cooling efficiency of the rotor. A magnet-holding member 7 is separately fixed to a claw-shaped magnetic pole 21 of at least one of a pair of pole cores 2, 3; each magnet-holding member 7 is provided with a magnet mounting part 72 on which a permanent magnet 5 is mounted on two sides of the claw-shaped magnetic pole 21 in circumferential direction; and each magnet mounting part 72 is formed so as to be located between the claw-shaped magnetic poles 21, 31 engaged with each other.

Abstract: Leakage of a magnetic flux from inside diameter face of claw magnetic poles is reduced to improve output, and deformation and vibration of the claw magnetic poles are reduced. A rotor includes: a rotor coil for generating magnetic flux; a pole core comprised of a first pole core body and a second pole core body that are arranged so as to cover the rotor coil, each being provided with protruding claw magnetic poles 21, 22 engaging with each other; a magnet 31 for reducing leakage of magnetic flux leaking from inside diameter side of the claw magnetic poles 21, 22; and a magnet-holding member 32 for supporting the magnet 31 on the claw magnetic poles 21, 22.

Abstract: The rotating electric machine has a stator coil wound around a stator, a magnetic pole and a signal rotor fixed to a rotor, and a detection stator, disposed opposite to the signal rotor, for detecting the rotational position of the rotor, characterized by further comprising an adjuster for adjusting the position of the signal rotor or the detection stator by supplying a direct current to a predetermined phase of the stator coil and then a direct current to a different phase from the predetermined phase to rotate the rotor by a predetermined angle or more and constrain the rotor.

Abstract: It is an object of the invention to obtain a generator motor for vehicles that can increase generated power or generated torque by a special positioning of permanent magnets in gaps between predetermined claw magnetic poles. The invention provides a generator motor for vehicles that includes a stator and a rotor provided rotatably within the inner periphery of the stator. The rotor includes: a pair of pole cores with plural claw magnetic poles formed on outer peripheral sides thereof, the plural claw magnetic poles of respective pole cores facing opposite to each other and meshing; plural permanent magnets that are arranged in the spaces between the claw magnetic poles adjacent to one another in the rotor circumferential direction; and a magnetic field coil that is mounted inside the pole cores. In the generator motor for vehicles, each permanent magnet02 is positioned toward one of the claw magnetic poles away from the center in the circumferential direction of the space between the claw magnetic poles.

Abstract: First and second permanent magnets are each disposed between circumferentially-adjacent pairs of first and second claw-shaped magnetic pole portions so as to contact a circumferential side surface of the first and second claw-shaped magnetic pole portions. An axial length (L1) of a stator core relative to an axial distance (L2) between facing end surfaces of first and second yoke portions is constructed so as to satisfy an expression L1>L2.

Abstract: A copper-zinc alloy powder of which zinc content is from 10 to 50 wt % and of which mean particle diameter is from 15 ?m or under is added to a Pb-less brush body comprising graphite, copper and a metal sulfide solid lubricant of a copper-graphite brush.