Abstract: A coolant flow channel is formed so as to pass axially through a rotor core radially inside magnet housing apertures, a linking flow channel is formed so as to have a flow channel width that is narrower than a maximum flow channel width of the coolant flow channel, so as to link the coolant flow channel and the magnet housing apertures, and so as to pass axially through the rotor core, and permanent magnets are fixed to an inner wall surface of the magnet housing apertures by an adhesive that is disposed only between a wall surface of the permanent magnets that is positioned on a radially outer side and the inner wall surface of the magnet housing apertures so as to expose a region of a wall surface of the permanent magnets that is positioned on a radially inner side that faces the linking flow channel.

Abstract: A permanent-magnet-embedded electric motor includes a stator core; a rotor core disposed on an inner diameter side of the stator core and including a plurality of magnet insertion holes corresponding to the number of magnetic poles; and a plurality of permanent magnets arrayed in a rotating direction in the magnet insertion holes. Gaps between two permanent magnets adjacent to each other among the permanent magnets disposed in the magnet insertion holes are formed such that the gaps on the radially outer side are larger than the gaps on the radially inner side.

Abstract: An interior permanent magnet motor capable of increasing an output of a motor without reducing torque by increasing demagnetization resistance. The interior permanent magnet motor includes a rotator including a rotator core, and a stator. The rotator core includes a plurality of magnet accommodating holes and a plurality of permanent magnets. The thickness in the short-side direction of each of the magnet accommodating holes is minimum at the center portion of the magnetic pole, and is gradually increased toward the radially outer side of the rotator core. At least the thickness in the short-side direction of the permanent magnet at the center portion of the magnetic pole is equal to the thickness in the short-side direction of the magnet accommodating hole at the center portion of the magnetic pole.

Abstract: A rotor of an electric motor with permanent magnets includes a pack of laminations made of ferromagnetic material with slots for the permanent magnets which are arranged radially with respect to the rotation axis and are extended parallel thereto. The permanent magnets are magnetized along a direction that is perpendicular to the radius of the rotor. Each lamination of the lamination pack further includes poles between the permanent magnets that are rotated in a given direction and by a given angle with respect to the corresponding poles of the adjacent laminations.

Abstract: A rotor (12) includes i) a stacked body (24) in which a plurality of holed steel plates (28a, 28b) provided with holes (29, 30) punched out of insulation coated steel plates are stacked together, and that includes a plurality of magnet holes (34) each of which is provided by the plurality of holes (29, 30) being connected together in an axial direction, and ii) a plurality of magnets (31n, 31s), at least one of which is arranged in each of the magnet holes (34).

Abstract: A permanent magnet electric machine includes a rotor configured to rotate about an axis. The rotor is comprised of axially stacked sections. Each section is comprised of axially stacked laminations that define a pattern of axial grooves on an outer surface of the rotor to reduce torque ripple. The pattern is different for at least two of the sections. The pattern for each section may alternate with respect to poles of the rotor.

Abstract: A second core block is stacked on a first filler-vestige-accommodating steel sheet along a rotational axis and has a plurality of second magnet insertion holes. Each of the plurality of second magnet insertion holes is defined by a second inner wall. Each of a plurality of second permanent magnets is inserted into each of the plurality of second magnet insertion holes. Each of second spaces is provided between each of the plurality of second permanent magnets and the second inner wall. The filler fills the second spaces. The plurality of second magnet insertion holes have a plurality of second filler injection portions, respectively, via which the filler is injected into the plurality of second magnet insertion holes. The first filler-vestige-accommodating steel sheet has a plurality of first hole portions opposite to the plurality of second filler injection portions, respectively.

Abstract: A scroll compressor includes a sealed container, a compression mechanism portion for a refrigerant, a compliant frame and a guide frame which support an orbiting scroll, an electric motor which drives the orbiting scroll, balance weights, a refrigerant flow path which introduces a refrigerant gas discharged through a discharge port of a fixed scroll to a bottom portion of the sealed container, cup-shaped members provided on both upper and lower surfaces of the rotor of the electric motor and contain the balance weights, a penetrating flow path through which the refrigerant gas containing a refrigerating machine oil flows from a lower side of the rotor of the electric motor through the interiors of the cup-shaped members to an upper side of the rotor, and a discharge cover which is provided at a lower portion of the frame, and which introduces the refrigerant gas to a discharge pipe.

Abstract: Provided is a synchronous reluctance rotating electrical machine that has superior rotor strength, and that can be manufactured at low cost. Asynchronous reluctance motor has a rotor wherein a multiple of quadrature axes are formed in a circumferential direction. The rotor has two neighboring quadrature axis holes sandwiching a center bridge in the circumferential direction of the rotor in order to form one quadrature axis. The quadrature axis holes communicate with an outer periphery of the rotor on a side opposite to that of the center bridge. The center bridge is located on the outer side, in a radial direction of the rotor, of an inscribed circle of the multiple of quadrature axis holes. Also, the rotor 3 has a direct axis projection protruding in the direction of a direct axis between two neighboring quadrature axes.

Abstract: A motor may include a rotor including a shaft; a stator; and a bearing supporting the shaft. The rotor may include a plurality of core pieces on an outer side of the shaft, a plurality of permanent magnets, and a mold resin part between the core pieces. The neighboring core pieces may include a magnet insertion hole provided therebetween. The permanent magnet may include two poles, with poles of neighboring magnets facing each other having identical polarity. The mold resin part may include at least one first guide part disposed closer to one side than the center between neighboring core pieces, and covers at least a portion of a surface on one side of the magnet insertion hole in a circumferential direction, the permanent magnet being in direct indirect contact via resin with the core piece disposed on the other side of the magnet insertion hole.

Abstract: A rotor yoke is rotatable about an axis, is adapted for a plurality of permanent magnets to be mounted therein, and includes a central section, a peripheral section, and a connecting section. The peripheral section is formed with a plurality of outer slots for respectively receiving the permanent magnets. The connecting section is formed with a plurality of inner slots, and a plurality of magnetic reluctance units adjacent to outer slots and each including at least two magnetic reluctance slots that are radially aligned relative to the axis. Each of the magnetic reluctance slots permits portions of magnetic field lines generated by the permanent magnets to pass around the magnetic reluctance slots so as to increase density of the magnetic field lines.

Abstract: A rotor for a rotary electric machine includes a rotor core which is formed by crimping laminated steel plates so as to be opposed to a stator, and has pairs of magnet housing holes disposed in a V shape, and pairs of magnets housed in the magnet housing holes. The rotor core has a crimped portion formed in a q axis core portion positioned between the two magnet poles, which are adjacent to each other in a circumferential direction, a first flux barrier formed between the q axis core portion and the magnet, and a pair of second flux barriers which enlarges from an end positioned at a center side of the magnet pole of the magnet housing holes toward a central axis of the rotor core. The crimped portion is formed so that distances between the crimped portion and both the first and second flux barriers are equal.

Abstract: A rotor for a dynamoelectric machine includes a rotor core having an outer periphery and at least a first set of magnets positioned within the outer periphery of the rotor core. The first set of magnets includes at least two block magnets and an arc magnet. The block magnets have a substantially parallel magnetization pattern and the arc magnet has a substantially radial magnetization pattern. The arc magnet has a concave surface facing the outer periphery of the rotor core. The first set of magnets defines a pole of the rotor. Rotors with other magnet configurations, and dynamoelectric machines and compressors incorporating such rotors, are also disclosed.

Abstract: An internal permanent magnet machine includes a wound stator, and a rotor core. The rotor core includes a plurality of first pole cavities, and a plurality of second pole cavities. One of a plurality of magnets is disposed within each of the pole cavities, and is injection molded into their respective cavity. The first pole cavities and the second pole cavities are each arranged in a pre-defined configuration, such that each pole cavity of the first pole cavities is identically positioned with one of the pole cavities of the second pole cavities within their respective pre-defined configurations, to define a corresponding pair of pole cavities. The pole cavity of the first pole cavities and the pole cavity of the second pole cavities of at least one of the corresponding pair of pole cavities define a different shape relative to each other.

Abstract: A permanent-magnet-embedded electric motor includes a stator having a coil wound on a stator core, and a rotor disposed rotatably inside the stator through a gap to an inner circumferential surface of the stator core. The rotor is provided with a rotor core formed of laminated steel plates having a plurality of magnet-embedding holes, and a permanent magnet housed and retained in each of the magnet-embedding holes. A thickness of the bridge portions formed between edges of the magnet-embedding holes and an outer circumference of the rotor core, and a thickness of a thinned link portion connecting adjoining two of the bridge portions are thinner than a thickness of the steel plates.

Abstract: A rotating portion of a motor includes magnets and a rotor core that holds the magnets in holding holes. Each of the magnets includes a first magnet element and two second magnet elements. The two second magnet elements are located on opposite circumferential sides of the first magnet element, and a coercivity of the two second magnet elements is smaller than the first magnet element. The rotor core includes a flux barrier including a void located on a radially inner side of the first magnet elements. A width of the magnets in a direction perpendicular or substantially perpendicular to a radial direction passing through a center of the corresponding first magnet element is larger than a width in the same direction of the corresponding flux barrier within a plane perpendicular or substantially perpendicular to the center axis.

Abstract: A motor including a stator, and a rotor adapted to rotate, wherein the stator includes a stator body, a plurality of teeth protruding from the stator body toward the rotor, and at least one stator magnetic barrier provided to each of the teeth to interrupt magnetic flux. A magnetic field produced in a direction parallel to the outer circumferential surface of the rotor is attenuated, and therefore demagnetization of permanent magnets included in the rotor may be prevented.

Abstract: An interior permanent magnet motor includes a stator and a rotor rotatably arranged so as to be opposed to the stator. The rotor includes a rotor core having a plurality of magnet insertion holes formed therein, into which corresponding permanent magnets are respectively inserted. The plurality of permanent magnets and the plurality of magnet insertion holes are each formed into an arc shape that is convex toward a center side of the rotor. When a shortest distance between the adjacent magnet insertion holes is defined as an inter-pole shortest distance (L), a ratio of the inter-pole shortest distance (L) to an outer diameter (D) of the rotor is 0.035?L/D?0.045.

Abstract: Satisfactory magnet torque is achieved while avoiding a reduction in the reluctance torque generated. The rotor core is provided with a plurality of magnet slots arranged in the circumferential direction of the rotor core and a gap formed of base holes and a projecting hole. The base holes extend from both ends in the circumferential direction of each magnet slot to the outer side of the rotor core. The projecting hole projects in the circumferential direction of the rotor core from at least one of peripheral portions, opposed to each other, of the base holes provided at both of the ends of the magnet slot, when viewed in an axial direction. The projecting hole is located closer to the magnet slot than to an outer peripheral side end of the base hole.

Abstract: A rotor structure for an electric rotating machine has a rotor, a plurality of strip-shaped permanent magnets which are arranged in a circumferential direction of the rotor, each of which penetrates the rotor in an axial direction of the rotor, flux barriers which are air gaps provided at positions corresponding to width-direction end portions of the permanent magnets to face the width-direction end portions of the permanent magnets, and demagnetization prevention holes, each of which is provided at a position in a vicinity of a corresponding one of the flux barriers and on an opposite side of the flux barrier from a stator and configured to reduce demagnetization at a corresponding one of the width-direction end portions of the permanent magnets.

Abstract: A void group made up of plural voids is formed on an outer circumferential side of a longitudinal end portion of a permanent magnet provided in a rotating electric machine rotor. The void group includes a first void and a second void row where plural second voids are formed at predetermined intervals at a position further radially outwards than the first void. A rib is formed between a pair of adjacent second voids of the second void row. End portions of the first void respectively overlap the pair of adjacent second voids. An imaginary line that extends along the center of the rib passes through at least part of the first void. A magnetic pole center-side end portion of the void group extends from the outer circumferential surface of the permanent magnet towards an outer circumferential surface of a rotor core.

Abstract: Permanent magnets that constitute the single magnetic poles are constituted by n permanent magnet segments, the n permanent magnet segments being configured such that shapes and directions of orientation thereof have mirror symmetry relative to a plane that passes through a magnetic pole center and that includes a central axis of the rotor core, and being oriented such that a permanent magnet segment that is further away from the magnetic pole center in a circumferential direction has a smaller angle of orientation, and the permanent magnet segment that is positioned further away from the magnetic pole center in the circumferential direction being produced so as to have an approximately fan-shaped cross-sectional shape in which a radial width is wider than a circumferential width.

Abstract: A rotor includes a rotor core having a plurality of pairs of magnet-receiving holes and a plurality of magnets respectively received in the magnet-receiving holes. Each pair of the magnet-receiving holes is arranged in a substantially V-shape that opens toward a stator side. For each pair of the magnet-receiving holes, there are provided a pair of corresponding magnetic flux barriers and a corresponding center bridge. The corresponding magnetic flux barriers are formed so as to respectively extend radially inward from magnetic pole centerline-side ends of the pair of the magnet-receiving holes. The corresponding center bridge radially extends between the corresponding magnetic flux barriers to separate them from each other. The corresponding center bridge is configured to include a radially inner portion and a radially outer portion located radially outward of the radially inner portion. The radially inner portion has a greater circumferential width than the radially outer portion.

Abstract: A rotor core includes low permeability areas having lower permeability than that of a material of the rotor core, between an outer circumference of each magnetic pole and a side surface of each permanent magnet. The low permeability areas are formed asymmetrically with respect to a geometric center of each magnetic pole so that a magnetic center of the magnetic pole is displaced toward one side with respect to the geometric center. The rotor cores are placed upside down relative to each other so that a relative position in the circumferential direction of the low permeability areas with respect to the permanent magnets differs.

Abstract: The invention relates to a permanent magnet synchronous motor, in particular an electric three phase motor, comprising a stator in which stator teeth with interposed stator grooves are arranged, at least one winding made of an electrically conductive material being provided on each stator tooth, further comprising a rotor with permanent magnets which are arranged radially in a spoke-like manner in the rotor. Said synchronous motor has a predetermined and defined maximum brake torque based on a predetermined diameter-length-ratio of the rotor, a number of rotor poles and a number of stator grooves. The present invention further relates to an electric power-assisted steering system.

Abstract: A rotor of a motor includes a rotor core; permanent magnet insertion holes that are formed in an outer circumferential portion of the rotor core along a circumferential direction and in each of which an air gap extending in an outer circumferential direction, is formed in both end portions in a state where a permanent magnet is inserted; and a permanent magnet inserted in each of the permanent magnet insertion holes, wherein a thin portion is formed between the air gap and an outer circumference of the rotor core, rounded corner portions are formed at two locations on an outer circumference side in the air gap, and a radius of curvature of any one of the corner portions is equal to or more than half a width of the air gap in a circumferential direction.

Abstract: A method produces a rotor which can rotate about a rotation axis, in particular for an electrical machine of a motor vehicle. At least two rotor body elements are each provided with a number of receiving pockets which are made in an axial direction. Magnet bodies are in each case pressed into the receiving pockets in the rotor body elements with an axial press-in direction. The rotor body elements are joined to one another in such a way that the press-in directions of the magnet bodies point away from one another. Additionally, an electrical machine has a rotor which is produced in this manner.

Abstract: A rotor of a motor includes a rotor core; permanent magnet insertion holes that are formed in an outer circumferential portion of the rotor core along a circumferential direction and in each of which an air gap extending in an outer circumferential direction, is formed in both end portions in a state where a permanent magnet is inserted; and a permanent magnet inserted in each of the permanent magnet insertion holes, wherein a thin portion is formed between the air gap and an outer circumference of the rotor core, rounded corner portions are formed at two locations on an outer circumference side in the air gap, and a radius of curvature of any one of the corner portions is equal to or more than half a width of the air gap in a circumferential direction.

Abstract: A rotor includes a rotor core having a plurality of pairs of magnet-receiving holes and a plurality of magnets respectively received in the magnet-receiving holes. Each pair of the magnet-receiving holes is arranged in a substantially V-shape that opens toward a stator side. The rotor core also has a plurality of q-axis core portions through which q-axis magnetic flux flows, a plurality of first magnetic flux barriers and a plurality of second magnetic flux barriers. Further, in the rotor core, the following dimensional relationships are satisfied: W2?W1; and W3?W1, where W1 is a width between centerlines L1 of the q-axis core portions and the corresponding first magnetic flux barriers, W2 is a width between the centerlines L1 and the corresponding second magnetic flux barriers, and W3 is a radial width between a radially inner surface of the rotor core and the second magnetic flux barriers.

Abstract: A rotor includes a rotor core in which a plurality of magnet housing holes are arrayed in a circumferential direction and a plurality of magnets fixed and held in the magnet housing holes by a filler material. The rotor core includes: a q-axis core portion, an outer flux bather that is formed between the q-axis core portion and the magnet and is filled with the filler material; and a bridge portion formed between a stator-side core portion and the q-axis core portion. The bridge portion includes a large-width portion, a small-width portion and a medium-width portion that are sequentially disposed from the q-axis core portion side towards the stator-side core portion side in the circumferential direction. The large-width portion has the largest radial-direction width. The small-width portion has the smallest radial-direction width. The medium-width portion has a medium radial-direction width between the largest radial-direction width and the smallest radial-direction width.

Abstract: In the regions around a magnetic shielding space, curved portions and having a rounded shape, which protrude toward the interior space of a magnetic shielding space, are formed at ends of a first side and a second side close to a first end and a second end of an outer-periphery side. In the vicinity of angular portions and of the magnetic shielding space that are positioned at both ends of the outer-periphery side, the magnetic flux density for a given cross-sectional area of a channel through which a short-circuit magnetic flux flows is reduced, and thus, the level of the short-circuit magnetic flux is reduced.

Abstract: A moving magnetic field generating apparatus includes a magnet array including magnets disposed at a first pitch such that N and S poles of adjacent magnets in the magnet array are alternated, and first and second magnetic pole piece arrays extending along the magnet array to interpose the magnet array therebetween with a gap from the magnet array. The first and second magnetic pole piece arrays are disposed with a predetermined phase difference therebetween. The first magnetic pole piece array includes first magnetic pole pieces disposed at a second pitch in an array and each having a length enough to face at least two adjacent magnets in the magnet array. The second magnetic pole piece array is configured similarly to the first magnetic pole piece array. One of the first and second magnetic pole piece arrays and the magnet array is relatively moved to the other at a predetermined speed.

Abstract: A rotor for a rotating electric machine has a core body and a magnet. The core body has a through-hole, a first polar portion, and a second polar portion. The first polar portion and the second polar portion are alternately arranged in the circumference direction. The magnet is disposed on the core body at a position corresponding to the first polar portion or the second polar portion. The through-hole has an arc-shaped surface having a first curvature radius. The first polar portion has an arc-shaped surface having a second curvature radius. The second polar portion has an arc-shaped surface having a third curvature radius. The first curvature radius is larger than or equal to the second curvature radius. The first curvature radius is larger than or equal to the third curvature radius.

Abstract: A rotary electric machine includes a stator and a rotor. The rotor has at least one permanent magnet arranged in a d-axis magnetic path. The rotor includes a magnetic gap part located between the permanent magnet arranged in the d-axis magnetic path of one pole and an adjacent magnet with a different polarity, such that a d-axis magnetic flux forms a d-axis bypass passing through an area other than the permanent magnet. The d-axis bypass provides a magnetic resistance in a d-axis direction that is set below a magnetic resistance in a q-axis direction that is orthogonal to the d-axis resistance.

Abstract: A rotating electric machine has a semiconductor magnetic sensor and a cylindrical housing with a cylinder part, which is made of a soft magnetic material, positioned closer to the semiconductor magnetic sensor relative to a back yoke of a stator core. The semiconductor magnetic sensor is positioned away from the cylindrical housing so that a shortest distance between a center of the semiconductor magnetic sensor and the cylindrical housing is equal to or greater than 50 times of a sum of a first space distance and a second space distance. With such an arrangement, a leak magnetic field generated by magnetic poles that leaks in an axial direction is prevented from disturbing the semiconductor magnetic sensor. Thus, a rotation position detection accuracy of the semiconductor magnetic sensor is improved.

Abstract: A permanent magnet embedded rotary electric machine includes: permanent magnets 23 respectively accommodated in the magnet accommodation holes 25. In the magnet accommodation hole 25, a portion of each permanent magnet 23 corresponding to the radially outer side of the rotor iron core 21 is fixed to the rotor iron core 21, and a refrigerant passage 27 is formed, in a shaft direction of the rotor iron core 21, between the rotor iron core 21 and a portion of the permanent magnet 23 corresponding to the radially inner side of the rotor iron core 21. Protrusions 28 are provided, perpendicularly to a passing direction of a refrigerant, on an exposed portion 21a of the rotor iron core 21 in the refrigerant passage 27.

Abstract: A motor casing of a driving device has a cylindrical wall portion, a bottom wall portion and a bearing holding portion formed in the bottom wall portion. An electric motor has a stator, a shaft and a rotor. A motor control unit controls operation of the electric motor. A first frame, to which the motor control unit is fixed, is provided between the motor control unit and the bottom wall portion of the motor casing. A first contacting portion is formed in the bottom wall portion and projected toward the first frame. The first contacting portion is in contact with the first frame at a front-side surface of the first contacting portion. A contacting surface area between the motor casing and the first frame is limitedly reduced, to thereby reduce noise caused by vibration. In addition, since a sufficient surface pressure can be obtained, strength of the driving device in its axial direction is increased.

Abstract: A plurality of lamination steel sheets that form a rotor core are stacked so that the lamination steel sheets are angularly shifted from each other, and a plurality of cavities are formed. Permanent magnets are molded and disposed in the cavities by injection molding. Each permanent magnet has a uniform plate thickness, and is bent with respect to an axial direction so as to have a triangular wave shape or an S shape. The permanent magnets are magnetized after being disposed in the cavities. The paired magnet pieces have poles of the same polarity, which face each other in the circumferential direction of a rotor, and each of the magnet pieces is magnetized in directions of normals to a surface of the magnet piece, the surface having a linear sectional shape.

Abstract: A motor and a rotor thereof are provided. Taking the distance between the two endpoints of a permanent magnet of a motor rotor that are on the side away from the center of an iron core as the length L of the permanent magnet, and the distance between a line connecting the two endpoints of the permanent magnet that are on the side away from the center of the iron core and the center point on the side of the permanent magnet that is close to the centerline of the iron core as the width H of the permanent magnet, then H/L ? 1/10. By adjusting the relationship between the length L and width H of the permanent magnet, the air gap magnetic density of the permanent magnet can be effectively increased.

Abstract: A motor rotor includes an iron core and permanent magnets provided inside the iron core. The iron core is provided with sets of mounting grooves on the iron core in the peripheral direction of the iron core, each set of mounting grooves having two or more mounting grooves provided intermittently in the radial direction of the iron core. There are sets of permanent magnets, the individual permanent magnet of each set of permanent magnets correspondingly being embedded into the individual mounting grooves of each set of mounting grooves; there is an island region between the outermost layer of mounting grooves and the periphery of the iron core, and an enhancing hole is provided in the island region, an enhancing rod being provided in the enhancing hole. A motor includes a motor stator and the motor rotor, with the motor rotor provided inside the motor stator.

Abstract: A motor rotor includes an iron core and a permanent magnet arranged inside the iron core, wherein, a plurality of groups of mounting grooves are arranged in the iron core in a circumferential direction of the iron core, and each group of mounting grooves comprises two or more than two mounting grooves arranged at intervals in a radial direction of the iron core; and a plurality of groups of permanent magnets are provided, and each permanent magnet in each group of permanent magnets is correspondingly embedded in the corresponding mounting groove of each group of mounting grooves. A motor having the motor rotor is further provided, and the magnetic reluctance torque of the motor rotor is increased, thereby increasing the output torque of the motor and the efficiency of the motor.

Abstract: A permanent magnet synchronous electric machine includes a stator and a rotor. Multiple wire grooves are provided peripherally on the stator, coils are provided within the wire grooves, and a stator tooth is provided between adjacent wire grooves. Multiple magnetic groove sets are provided peripherally within the rotor, each of the magnetic groove sets includes at least two magnetic steel grooves, with permanent magnets placed within the magnetic steel grooves, and a magnetic tunnel formed between the magnetic steel grooves. Of two adjacent magnetic tunnels, an end of one magnetic tunnel is opposite a wire groove and an end of the other magnetic tunnel is opposite a stator tooth. The permanent magnet synchronous electric machine has a more steady output torque, and also reduces the noise and vibration provided during operation.

Abstract: There is provided a manufacturing method of a laminated iron core which is formed of a strip-shaped iron core piece. The strip-shaped iron core piece includes segment iron core pieces connected through a joint positioned in a radial outside, and each of the segment iron core pieces has an artuate shape. The joint by which adjacent segment iron core pieces are connected is folded and lateral ends of the adjacent segment iron core pieces are aligned. The strip-shaped iron core piece is spirally wound while circumferentially shifting mutual joints formed on vertical adjacent layers. Crush processing is performed for flattening a bulged portion in a thickness direction of the segment iron core pieces formed at a time of folding the joint, and the crush processing is performed simultaneously with a time when or after mutual segment iron core pieces arranged vertically are crimped and laminated.

Abstract: A rotor of an interior permanent magnet motor includes a rotor core; permanent magnet insertion holes formed in an outer circumferential portion of the rotor core along a circumferential direction; a permanent-magnet end-portion air gap formed in each of both end portions of each permanent magnet insertion hole; a permanent magnet inserted in each permanent magnet insertion hole; and slits formed in an outer circumferential core portion on an outer side in a radial direction with respect to each permanent magnet insertion hole, wherein a width of a core present between the permanent-magnet end-portion air gap and the slit and a width of a core present between the slits are such that a width of a core gradually increases as the core is closer to a magnet pole center from the interpolar line.

Abstract: According to one embodiment, a rotor is configured by a rotor core and magnetic poles. Two or more types of permanent magnets are used such that each product of coercivity and thickness in the magnetization direction becomes different. A stator is located outside the rotor with air gap therebetween and configured by an armature core winding. At least one permanent magnet is magnetized by a magnetic field by a current of the armature winding to change a magnetic flux content thereof irreversibly. A short circuited coil is provided to surround a magnetic path portion of the other permanent magnet excluding the magnet changed irreversibly and a portion adjacent to the other permanent magnet where the magnetic flux leaks. A short-circuit current is generated in the short circuited coil by the magnetic flux generated by conducting a magnetization current to the winding. A magnetic field is generated by the short-circuit current.

Abstract: According to one embodiment, a rotor is configured by a rotor core and magnetic poles. Two or more types of permanent magnets are used such that each product of coercivity and thickness in the magnetization direction becomes different. A stator is located outside the rotor with air gap therebetween and configured by an armature core winding. At least one permanent magnet is magnetized by a magnetic field by a current of the armature winding to change a magnetic flux content thereof irreversibly. A short circuited coil is provided to surround a magnetic path portion of the other permanent magnet excluding the magnet changed irreversibly and a portion adjacent to the other permanent magnet where the magnetic flux leaks. A short-circuit current is generated in the short circuited coil by the magnetic flux generated by conducting a magnetization current to the winding. A magnetic field is generated by the short-circuit current.

Abstract: A rotor has a rotor core arranged to radially face a stator. The rotor core has an accommodation hole extending axially from an axial end face of the rotor core. A magnet is received in the accommodation hole. A recess, which is dented in a direction separating from the magnet, is formed in an end surface of the accommodation hole. The recess has an opening facing the magnet. A pair of open distal portions are arranged at opposite sides of the opening and pressed against the magnet.

Abstract: Provided is a rotor core of a motor, the rotor core, the rotor core including: a thin disk-shaped rotor core member; a shaft hole penetratively formed at a center of the rotor core member; a shaft press-fitted into the shaft hole; a plurality of magnet insertion holes penetratively formed at a position near to a periphery of the rotor core member for inserted coupling by a magnet; and a magnet support rotor core member in which a magnet support member tightly contacting a magnet inserted into the magnet insertion hole to a radial direction of the rotor core member is protrusively formed at the magnet insertion hole, wherein the rotor core members are stacked each at a predetermined height, and the magnet support rotor core members are arranged at an upper surface and a bottom surface of the plurality of stacked rotor core members, and the shaft is press-fitted into the shaft hole.

Abstract: A rotor yoke includes plural rotor cores having a disk shape laminated to be formed in a cylindrical shape, plural magnet inserting holes each including a longitudinal side and a transverse side, penetrated in a laminating direction of the rotor yoke, a bridge portion arranged between the magnet inserting holes adjacent to one another in a circumferential direction of the rotor cores and connecting an inner area to an outer area, a recessed portion arranged at the bridge portion and formed from the outer circumferential surface of the rotor cores toward radially inward and a protruding edge protruding toward an inside of the magnet inserting hole.

Abstract: Disclosed is a motor including: a rotor housing; a stator assembly located inside the rotor housing; a first core located inside the stator assembly; a second core located at the center of the rotor housing; and a coil housing located inside the rotor housing and having a space portion formed at the inside thereof.