Abstract: A rotor assembly (10) has a rotor support hub (12) which includes a plurality of first connection parts arranged about a periphery the rotor support hub. The rotor assembly further has a plurality of rotor segments (14) each having a second connection part. Each of the second connection parts are cooperable with at least one of the plurality of first connection parts to connect each of the rotor segments about the periphery the rotor support hub. A plurality of fixing parts (26) are each configured to be received between cooperating first and second connection parts and to form an inference fit therebetween so as to secure the rotor segments to the rotor support hub. The rotor support hub may comprise a plurality of laminations.

Abstract: A rotor core for a rotating electrical machine includes a laminated body that has insertion holes, a permanent magnet accommodated inside each of the insertion holes and fixed to the laminated body, and an end plate arranged at an end of the laminated body in the rotation axis direction. The laminated body includes annular flat metal plates that are stacked. A circumferential edge of the end plate is welded and fixed to circumferential edges of the metal plates such that the end plate is arranged at an end of the laminated body in the rotation axis direction to close openings of the insertion holes. A through-hole extends through an outer edge portion of at least one of an outermost metal plate of the laminated body or the end plate.

Abstract: A rotor is provided for an electric motor. The rotor shaft is located within a central opening of the rotor core. The central opening is sized larger than the rotor shaft such that a circumferential gap exists between the rotor core and the rotor shaft while the shaft is located by protrusions in the central opening of the rotor core. The circumferential gap is filled with a resin.

Abstract: A rotor suitable for use in an electric motor or generator. The rotor comprises a hub having a central axis, a plurality of rotor segments and permanent magnets, and an assembly for retaining the segments on the hub. The segments are arranged around the hub to define at least two rings, which are adjacent to each other in the axial direction with a permanent magnet disposed between each of the segments in each ring. The assembly includes a plurality of rods which extend in an axial direction to retain the rotor segments. An intermediate plate is located between each ring of segments through which the rods pass, wherein the intermediate plates and the outer circumferential surface of the hub engage with each other in such a way as to allow the intermediate plates to move axially along the hub.

Abstract: This disclosure discloses a rotary electrical machine of a variable field type configured to change a field magnetic flux. The rotary electrical machine includes a stator including stator windings and a stator core, and a rotor including a shaft rotatably supported, a rotor core relatively rotatably mounted on the shaft, and a plurality of first permanent magnets disposed on the rotor core. The rotor core is configured to be held at a predetermined angular position with respect to the shaft with a magnetic suction force of the first permanent magnet, and to increase a relative angle with the shaft in response to an increase of a load torque against the magnetic suction force. The rotor core has an approximately same axial length as the stator core.

Abstract: In an embedded magnet rotor for a rotary electric machine, permanent magnets are respectively accommodated in magnet housing apertures that pass axially through a rotor core that is held by a shaft, an adhesive is injected into and cured in gaps between the permanent magnets and the rotor core in the magnet housing apertures, and fixes the permanent magnets to the rotor core, a first end plate is held by the shaft so as to contact a first axial end of the rotor core, and blocks first axial end openings of the plurality of magnet housing apertures, and a fill rate of the adhesive that is injected into the gaps is increased gradually from a first axial end toward a second axial end of the magnet housing apertures.

Abstract: The aim is to provide an individual-segment rotor, the construction of which requires low production expenditure. For this purpose, an individual-segment rotor having an axis of rotation and a plurality of laminated core segments (5) arranged around the axis of rotation is provided. Each laminated core segment (5) is radially fastened to a separate flexural support (11). All flexural supports (11) are radially retained by at least one fastening ring (14).

Abstract: An electric motor (40) includes stator (10), rotor (14) including rotation body (20), a pair of bearings (15), and a pair of brackets (17, 24). Rotation body (20) includes outer iron core (25), inner iron core (26), and dielectric layer (23). Outer iron core (25) is located in the outer side of rotation body (20). Inner iron core (26) is fixed to shaft (16). Dielectric layer (23) is located between outer iron core (25) and inner iron core (26) and includes at least two dielectric bodies different in dielectric constant.

Abstract: Rotors with trapped-field magnet (TFM) bulks, machines with TFM rotors, and methods of activating and/or using machines with TFM rotors.

Abstract: A rotor for an electrical machine includes a base body, a plurality of permanent magnets which are arranged axially in rows on an outer surface of the base body. At least two of the permanent magnet rows are arranged so as to be mutually offset in an axial direction. First and second locking plates are respectively arranged at axial end faces of the base body to secure the rows of permanent magnets in the axial direction, with the first and second locking plates each having a surface which rests on respective axial ends of the permanent magnet rows. A bandage is wound around the base body to fix the permanent magnets to the outer surface of the base body.

Abstract: A rotor having an improved structure capable of achieving enhanced durability is disposed in a motor, the rotor including a sleeve having a shaft hole, through which a motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and permanent magnets each disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates may be disposed at opposite sides of the permanent magnets in an axial direction. Each of the first and second cover plates may include a shaft receiving hole to receive the motor shaft. The rotor may include a plurality of support members each having a magnet support portion arranged to support an outer end of a corresponding one of the permanent magnets in a radial direction of the rotor.

Abstract: A spoke type permanent magnet motor according to the present invention includes a stator having a stator slot radially disposed according to the center thereof and a stator core radially formed between the stator slots; a spoke type rotor, provided inside or outside the stator, having a rotor core radially disposed in the same direction as the stator slot and stator core and a permanent magnet radially disposed between the rotor core; a first fastening member, made of non-magnetic material, provided at the top and bottom of the rotor, respectively, in the height direction of the rotor; and a second fastening member, made of non-magnetic material, provided to penetrate the rotor core and first fastening member, thereby to maintain high output density and to easily implement miniaturization.

Abstract: Disclosed therein is a rotor for a motor. The rotor includes: a rotor core including an annular ring having a shaft hole formed at a central portion thereof, a plurality of yokes formed around the annular ring, and magnet insertion holes formed between the neighboring yokes; magnets respectively inserted into the magnet insertion holes; and a pair of rotor covers each having a ring plate, which has a shaft insertion hole formed at a central portion thereof, and a plurality of stoppers protrudingly formed around the ring plate. A pair of the rotor covers are joined to an upper portion and a lower portion of the rotor core in such a fashion that the stoppers are respectively located at side portions of the magnet insertion holes.

Abstract: A motor having a structure capable of achieving a reduction in magnetic flux leakage occurring at a rotor and a washing machine, to which the motor is applied. The motor includes a stator including a plurality of stator cores arranged in a circumferential direction, and coils respectively wound around the stator cores, and a rotor rotatably arranged inside the stator. The rotor includes a plurality of rotor cores arranged in a circumferential direction of the rotor, a plurality of magnets each disposed between neighboring ones of the rotor cores such that the magnet extends in an axial direction of the rotor outwardly of upper and lower surfaces of the neighboring rotor cores, and a molded body to support the plurality of rotor cores and the plurality of magnets. The molding body includes a shaft hole, to which a motor shaft is coupled.

Abstract: In order to enable simple, low-cost monitoring of a motor, a switch box cover for the motor, a condition monitoring system has a sensor unit for detecting a measured variable of the motor, a communication device, which is designed to provide a characteristic value that characterizes the measured variable to a reading device, and a supply unit for supplying the sensor unit with energy.

Abstract: A rotor for an electrical machine has a rotor body and permanent magnets arranged on the circumference of the rotor body, wherein those areas of the circumference of the rotor body which are covered by the permanent magnets have at least one recess and/or that side of the permanent magnets which faces the circumference of the rotor body has at least one recess. Each recess is configured as a slot which extends in parallel relationship to a circumference-proximal side of the permanent magnets. Removably insertable in the recesses are ferromagnetic bars to allow removal of the permanent magnets.

Abstract: The rotor for an electric rotating machine includes a rotor core fixed to a rotating shaft and formed with at least one magnet accommodating hole, a magnet accommodated in the magnet accommodating hole, a resin portion filled in the magnet accommodating hole accommodating the magnet, a first end plate fixed to the rotating shaft at one axial side of the rotor core, and a second end plate fixed to the rotating shaft at the other axial side of the rotor core. The axial fixing force of the second end plate against the rotating shaft is smaller than that of the first end plate. At least a part of the resin portion is present in an axial area between the magnet accommodated in the magnet accommodating hole and the first end plate, and the magnet is in direct contact with the second end plate.

Abstract: A motor of the invention has a rotary body of a rotor, and the rotary body includes an outer core constituting an outer portion of the rotary body, an inner core constituting an inner portion connected to a shaft, and a dielectric layer disposed between the outer core and the inner core. The outer core has a protruding portion that protrudes inward from an inner surface thereof, and the inner core has a protruding portion that protrudes outward from an outer surface thereof, wherein the outer core and the inner core are so disposed that an end face of the protruding portion of the outer core and an end face of the protruding portion of the inner core confront partially with respect to each other.

Abstract: A rotor having an improved structure capable of achieving an enhancement in durability and a motor having the rotor are disclosed. The rotor is configured to co-operate with a stator in an electromagnetic manner such that the rotor rotates. The rotor includes a sleeve having a shaft hole, through which the motor shaft extends, rotor cores spaced apart from one another in a circumferential direction of the rotor, and at least one of permanent magnets disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve. First and second cover plates are disposed at opposite sides of the permanent magnets in an axial direction. The first and second cover plates have plate holes respectively corresponding to the through holes of the rotor cores. The rotor cores and the first and second cover plates are coupled by fastening members.

Abstract: A rotary electric machine is provided with a shaft which is a rotary shaft; a laminated core which has a permanent magnet embedded therein and is press-fitted to the shaft; a first member which is a magnetic member and is press-fitted to the shaft so as to hold an end portion of the laminated core; a second member which is a nonmagnetic member and is provided between the end portion of the laminated core and the first member so as to hold an end portion, with respect to the axial direction of the shaft, of the permanent magnet; and at least one of a first gap between the first member and the second member, and a second gap between the laminated core and the second member.

Abstract: A permanent magnet rotor including a shaft, a rotor core fixed to the shaft, a magnet disposed around the core, and a linker fixed relative to the shaft and located at one end of the core. An elastic clamping structure is arranged between the linker and the magnet such that rotational torque of the magnet is transferred to the shaft via the linker.

Abstract: A rotating machine has a stator and a permanent magnet rotor that is more easily made, lower cost, and lighter by virtue of a plurality of permanent magnet assemblies mounted on a rotor body. Each magnet assembly includes two facing core plate stacks supporting a permanent magnet between them. Each core plate stack is made from a plurality of core plates of substantially identical size and shape and with on or more holes in substantially the same location to form respective bores in the stack. A tie rod is formed in each bore and retains the plates in a stack via bevels in the holes of the end plates. Preferably, the tie rods also apply compressive force as a result of placing the stacked plates in an injection mold, injecting plastic into the mold to fill each bore with plastic, and allowing the plastic to cure. As the plastic cures, it shrinks so that the tie rods pull the end plates together. To enhance the pressure, the stacked plates can be compressed before and during the injection process.

Abstract: A rotor includes a rotor core comprised of magnetic steel sheets laminated in the axial direction and a pair of end plates that are respectively provided on the axial end faces of the rotor core so as to together sandwich the rotor core in the axial direction. The rotor is rotatably disposed in an electric rotating machine with a circumferential surface of the rotor core facing a stator. At least one of the end plates is configured to have through-holes, each of which is formed so as to axially penetrate the end plate, and a pressing portion that is radially positioned on the stator side of the through-holes. The pressing portion abuts a corresponding one of the axial end faces of the rotor core and exerts an axial load on the corresponding axial end face of the rotor core by an elastic force of the end plate.

Abstract: An end plate is made of a magnetic material, and holds an axis-direction end surface of a rotor core in which a permanent magnet is buried. The end plate includes: a protruded portion constructed so as to be caused to pressingly contact the axis-direction end surface of the rotor core when mounted in the rotor; and a depressed portion constructed so as not to contact the axis-direction end surface. The protruded portion is formed so as to contact only one of a d-axis magnetic path region and a q-axis magnetic path region that are formed by the permanent magnet within the rotor core.

Abstract: A motor including: a rotatably supported shaft; and a rotor section press-fitted and fixed coaxially to the shaft, wherein the rotor section is provided with: a rotor yoke; a housing hole formed on an end surface of the rotor yoke along the axial direction of the shaft; a permanent magnet housed within the housing hole; and a pair of end surface plates: that have a ring-shaped plate that is provided so as to cover at least an opening section of the housing hole and that is made of a non-magnetic material, and a supporting plate that supports the ring-shaped plate, that is press-fitted and fixed on the shaft, and that has a coefficient of linear expansion equivalent to that of the shaft; that are provided on axial end portions of the rotor yoke; and that clamp the rotor yoke so as to hold the permanent magnet within the housing hole.

Abstract: A brushless DC motor including a stator having plural slots; and a rotor which has plural permanent magnets and is divided into three rotor blocks in a rotation axis direction, the three rotor blocks being layered so that the arrangement angles of the rotor blocks differ from each other by an amount of a mechanical angle in a rotary direction that is equivalent to one third of a pulsation period of cogging torque generated by the rotor and stator. A brushless DC motor including a rotor having plural magnetic poles provided at an equal pitch in a circumferential direction by mounting permanent magnets in magnet mounting holes; and a stator having plural slots arranged at an equal pitch in a circumferential direction.

Abstract: Encapsulation of a permanent magnet rotor is achieved by applying a glass roving material to spaces in the rotor structure, applying a veil cloth around the outer surface of the rotor, mounting a vacuum bag with vacuum ports around the outer surface of the rotor, removing vent plugs from the end walls of the rotor and screws from an inner ring of the rotor and replacing them with vacuum ports and applying a vacuum to the vacuum ports. After air has been removed from the rotor, an encapsulating resin is applied to some of the ports to introduce resin into the interior of the rotor. After curing of the resin the vacuum bag is removed and the outer surface of the rotor is machined to the desired outer dimension of the rotor.

Abstract: An electromagnetic machine is provided. The machine includes a stator extending along a longitudinal axis and having an inner surface defining a rotor receipt cavity. The rotor extends along and is rotatable about the longitudinal axis within the rotor receipt cavity. A plurality of ring assemblies are supported on the rotor and a plurality of magnets are circumferentially spaced about the rotor and extend through the ring assembly. Each magnet is generally parallel to the axis of the rotor.

Abstract: A rotor structure for a permanent-magnet motor is disclosed as including an annular laminated stack (2) of electromagnetic steel sheets incorporating magnets, annular end plates (1a, 1b) located at both ends of the annular laminated stack to hold the same, a cylindrical core buck (3) carrying thereon the annular laminated stack and the annular end plates, and a rotor shaft (5) integrally connected to the cylindrical core buck for rotating movement. The annular laminated stack has a plurality of first fixing portions (8a, 8a′, 8a″; 8b, 8b′, 8b″), and each of the annular end plates has a plurality of second fixing portions (7a, 7a′, 7a″; 7b, 7b′, 7b″) which are held in engagement with the first fixing portions of the annular laminated stack, with the annular end plates and the annular laminated stack being fixed to one another by caulking at the first and second fixing portions.

Abstract: To provide an orientation device capable of efficiently orientating resinous magnets filled in slits of a rotor core. An orientation device comprising a plurality of permanent magnets 5 disposed at the same intervals as slits 2 in the rotor core 1 with their magnetic poles of the same polarity adjacent to each other, along the outside circumference of a rotor core housing section 4 for housing the rotor core 1, and a plurality of pole pieces 6 disposed between the plurality of permanent magnets 5, wherein the width of the pole piece 6 at the end 6a on the side of the rotor core housing section 4 is no larger than the maximum width &agr; max of an outermost slit 2a of the rotor core 1 between opposite ends thereof.

Abstract: An electromagnetic machine is provided. The machine includes a stator extending along a longitudinal axis and having an inner surface defining a rotor receipt cavity. The rotor extends along and is rotatable about the longitudinal axis within the rotor receipt cavity. A plurality of ring assemblies are supported on the rotor and a plurality of magnets are circumferentially spaced about the rotor and extend through the ring assembly. Each magnet is generally parallel to the axis of the rotor.

Abstract: A rotor for an electric machine which rotor includes a multi-faced shaft, a plurality of pole pieces and permanent magnets carried by the shaft and a plurality of the rods extending between a pair of lateral flanges and passing through the pole pieces between the flanges to retain the pole pieces on the shaft, the pole pieces retaining the magnets on faces of the shaft.

Abstract: An electric motor including a permanent-magnet rotor having embedded magnets held in place by several segments. The embedded magnets are secured by segments including non-circular openings near their centers. Several non-magnetic, non-conductive bars extend through the non-circular openings of the segments to secure the segments in relation to the shaft. The motor is capable of producing high torque while only requiring a minimum amount of space.