Abstract: An electric machine, in particular an electrically excited claw pole generator for a motor vehicle, is provided, having a stator winding, the phase terminals of which may be connected in the manner of a pentagram to a rectifier system. The stator winding has a five-phase design, phase terminals situated in adjacent slots being interconnected at least once. All of the phase terminals may be interconnected are situated in adjacent slots.

Abstract: A stator includes a stator support having multiple axially extending circumferentially arranged slots. Multiple phases each include multiple coils. Each of the coils has first and second opposing sides of conductor provided in the slots. A conductor in a second side of a first phase first coil is interspersed with a conductor in a second phase first coil. The conductors in a first side of the first phase first coil are arranged adjacent to one another and non-interspersed.

Abstract: A magneto generator can be made small in size and light in weight, and improved in power generation efficiency. The magneto generator includes an iron core having an iron core main body and a plurality of teeth (9) radially extending from the iron core main body, and an armature having a first three-phase winding (14) and a second three-phase winding (15) comprising winding portions (18u, 18v, 18w, 19a, 19b and 19c) of individual phases wound around the stator core. The individual first and second three-phase windings (14, 15) have the winding portions (18u, 18v, 18w, 19a, 19b and 19c) constructed by concentratedly winding conductors around the individual teeth (9), respectively, while skipping every predetermined number of teeth (9), and are wound in a state divided into an inner layer side and an outer layer side, respectively.

Abstract: The present invention provides a generator comprising winding arrangements, each winding arrangement comprising at least an inner coil and an outer coil constituting a concentric structure of coils. The inner coil is constituted by an inner conductor and the outer coil is constituted by an outer conductor, the inner and outer conductors being connected in series. The inner conductor, which is wound around a tooth, has a smaller electrical resistance per unit length than the outer conductor.

Abstract: A wiring component for a motor coil includes: a wire coil configured by a plurality of wire segments arranged in a circumferential direction so as to form a ring shape, each of the wire segments including an arc-shaped main-body portion made of a conductive wire rod bent in an arc shape, protruding portions formed at both end portions of the main-body portion and upright portions respectively formed at end portions of the protruding portions; an inner clip formed with a plurality of first holding portions at an outer circumferential surface of the inner clip; and an outer clip formed with a plurality of second holding portions at an inner circumferential surface of the outer clip. The inner clip and the outer clip are connected to each other so as to hold the wire coil between the first holding portions and the second holding portions.

Abstract: Provided is a crossover module, which can facilitate the process of manufacturing a stator. The crossover module (20) is a module having crossovers (23) for connecting such coils (13) electrically with each other as are mounted on a stator core (11) of a motor (100). The crossover module (20) is constituted such that its shape can be changed between a shape, in which it is mounted on the stator core (11), and a shape, in which it is opened to the outer sides from the former shape.

Abstract: A stator winding is configured by connecting a first three-phase stator winding and a second three-phase stator winding in parallel. A U1-phase winding of the first three-phase stator winding is configured by connecting a U1-1-phase winding portion and a U1-2-phase winding portion in series, and a U2-phase winding of the second three-phase stator winding is configured by connecting a U2-1-phase winding portion and a U2-2-phase winding portion in series. The U1-1-phase winding portion and the U2-2-phase winding portion are m-turn wave windings, and the U2-1-phase winding portion and the U1-2-phase winding portion are n-turn wave windings (where n does not equal m). The U1-1-phase winding portion and the U2-1-phase winding portion are mounted into a first slot group, and the U1-2-phase winding portion and the U2-2-phase winding portion are mounted into a second slot group.

Abstract: A segmented annular stator for a dynamo-electric machine is disclosed which simplifies transport and assembly of the machine. The segment has a cross section essentially shaped as a circular arc and includes a first and a second segment boundary configured for attachment to an additional segment, a corresponding coil associated with each phase of a three-phase system, a first conductor, and a second conductor. The first conductor is connected to the second conductor via an end connection in an area of end windings, such that a first coil associated with a first phase surrounds second and third coils associated with second and third phases of the three-phase system.

Abstract: Embodiments are directed to an expander having two or more hydraulic stages with different physical geometries. In an embodiment, a first hydraulic stage uses nozzle vanes machined with a first geometry, while a second hydraulic stage uses nozzle vanes machined with a second geometry. Different nozzle vanes can be combined to tune the performance of the expander as the optimal operating conditions change. In yet another embodiment, an expander is equipped with a generator having a double wound stator with two sets of parallel windings. For high operating loads greater than a threshold, a first set of windings operates while a second set of windings, operating at a lower frequency, is disconnected. For operating loads that are less than the threshold, the first set of windings is disconnected and the second set of windings operates, enabling the generator to continue to operate close to 100% load for less expander power.

Abstract: The invention relates to an electrical drive having a motor with a rotor and a stationary stator, which has a coil arrangement, and having a motor controller for controlling the motor, with the motor controller being configured to pass current through the coil arrangement in order to produce an excitation field, with the coil arrangement having a plurality of coil winding sections, and with each coil winding section having a plurality of coil sections, wherein the polarity of at least one coil section of the plurality of coil sections of each coil winding section can be selectively reversed with respect to the other coil sections of the coil winding section. The drive is particularly suitable for use for an electrical tool.

Abstract: In an electric rotating machine, a stator coil is comprised of first and second winding groups. The stator coil is wound around a stator core in a concentrated winding manner so that the phase difference in electrical angle between each corresponding pair of windings of the first and second winding groups is equal to ?/6. Further, the windings of the first and second winding groups are connected to form ?-Y connections. Consequently, the sixth harmonic components of the electromagnetic forces created by the windings of the first winding group can be offset by those of the electromagnetic forces created the windings of the second winding group. As a result, the total magnetic noise and torque ripple generated in the machine can be reduced. Moreover, the machine can be driven with only a single three-phase inverter to achieve the effects of reducing the total magnetic noise and torque ripple.

Abstract: In a motor system, a motor includes a rotor and a stator. The rotor includes magnet poles and consequent poles. The stator includes a stator core and a stator coil that is comprised of first and second m-phase coils. The number of slots of the stator core provided per circumferentially-adjacent pair of the magnet and consequent poles is equal to 4m. The phase windings of the first m-phase coil are alternately arranged with those of the second m-phase coil in a circumferential direction of the stator core. An inverter energizes the first and second m-phase coils to cause them to respectively create first and second spatial magnetic fluxes. Variation in a resultant spatial magnetic flux, which is the resultant of the first and second spatial magnetic fluxes, is less than variations in the first and second spatial magnetic fluxes in a circumferential direction of the rotor.

Abstract: A brushless motor includes: a stator assembly including a stator core which includes a plurality of pole teeth each having a winding therearound; and a rotor assembly including a magnet which has a ring shape, is rotatably disposed so as to oppose the pole teeth of the stator core and which is circumferentially magnetized with a plurality of magnetic poles with opposite polarities alternating with each other, wherein the number of the pole teeth of the stator core is twice the number of the magnetic poles of the magnet such that each magnetic pole opposes a pair of adjacent pole teeth, one pair of adjacent windings have the same number of winding turns and the same winding direction as each other, and wherein another pair of windings located next to the one pair of windings have a winding direction opposite to the winding direction of the one pair of windings.

Abstract: An inner rotor type brushless motor includes a stator. The stator is made of a plurality of stator sections. Each one of the stator sections has a plurality of core members, an insulator, and a winding wound on the core members via the insulator. The core member includes a yoke portion and a tooth portion. The insulator includes a ring portion to connect the core members. Since each stator section can provide sufficient distance and space between two core members on the same stator section, it is easy to wind the winding on the tooth portions. The stator sections can be assembled along an axial direction to form the stator. The yoke portions are circumferentially arranged to connect each other to form a magnetic path.

Abstract: A three-phase motor includes a bearing structure, a rotor structure and a stator structure. The bearing structure has a bushing. The rotor structure has a shaft disposed in the bushing. The stator structure is disposed corresponding to the rotor structure and includes a first coil assembly and a second coil assembly overlapped on the first coil assembly. A fan with the motor is also disclosed. The present invention can increase the ratio of the effective coils of the stator structure, and further promote the operation efficiency of the three-phase motor and the fan with the three-phase motor.

Abstract: There is provided a single phase induction vibration motor including: a bottom member including a shaft and a permanent magnet; a rotating member rotatably coupled to the shaft; a coil member disposed on a portion of the rotating member; and a mass member disposed on the coil member such that weight eccentricity of the rotating member with respect to the shaft increases.

Abstract: A stator includes a stator core and a multi-phase stator coil comprised of a plurality of electric wires. Each of the electric wires has first, second, . . . , nth in-slot portions and first, second, . . . , (n?1)th turn portions, where n is an integer not less than 4. The first in-slot portions of the electric wires are located most radially outward and the nth in-slot portions are located most radially inward in the slots of the stator core. Each of the electric wires also has a first end portion positioned on the first in-slot portion side and a second end portion positioned on the nth in-slot portion side. Each of phase windings of the stator coil is formed of at least two of the electric wires. The first end portion of one of the two electric wires is connected to the second end portion of the other electric wire.

Abstract: A continuous stator winding includes a conductor having a rectangular cross-section, and a plurality of loops formed in the conductor. Each of the plurality of loops includes first and second substantially straight segments joined by at least one angled segment. A cross-over feature is formed in the at least one angled section. The cross-over feature includes a deformation formed in the conductor configured and disposed to nest with other conductors that form the stator winding.

Abstract: A method of P-forming a conductor having a rectangular cross-section to create a continuous stator winding. The method includes forming a conductor having a rectangular cross-section into a series of first and second substantially parallel segments that meet at a vertex, deforming the conductor such that each of the first and second segments are non-parallel to form a cross-over feature at the vertex, and deforming a section of each of the first and second segments to include corresponding first and second portions that are generally parallel to create the continuous stator winding.

Abstract: To further reduce force ripple of a linear motor, a primary part has a plurality of windings sequentially arranged in an axial direction and subdivided in the axial direction into groups having an identical number of windings. The sequence of the association of the windings with the phases of a multi-phase system is not repeated at least in a group of windings within the primary part as long as the winding sense of the corresponding windings in the group is maintained.

Abstract: A stator for an electric motor includes a stator coil including a wire pair with respective ends that are joined with a ring. The ring is positioned around the wire pair and joined to the wire pair by a metal joining process.

Abstract: A stator includes a core fixed to a case of a rotary electric machine, and a plurality of winding wire coils that are wound on the core and that form a coil end protruded in the axial direction of the core. The two winding wire coils have a first and second conducting wires that are exposed in a distal end of each of the two coils. The stator includes: a joint in which the first and second wires are joined together at the coil end and in which proximal portions of the two coils approach each other with an acute angle therebetween so that the first and second wires lie on each other; and an insulating coat formed to enclose the joint with an insulating material that is coated entirely over peripheries of the two coils in their circumferential directions while filling a space across which the proximal portions form the acute angle. A rotary electric machine includes the stator, the case and a rotor.

Abstract: A current detection unit detects an electric current caused by superimposing a direct current from a direct-current power source on an alternating current from an alternating-current power source and supplied through a brush to a direct-current motor. An extracting unit extracts an alternating-current component of the detected electric current. An angle detection unit detects a rotation angle of the motor according to the extracted alternating-current component. A direction detection unit detects a rotative direction of the motor according to a change pattern of the extracted alternating-current component. A core of the motor has slots each defined between adjacent two of teeth. The slots respectively accommodate phase coils respectively wound around the teeth. Turns of the phase coils are different from each other.

Abstract: To provide a stator capable of achieving downsizing and high output power and a stator manufacturing method, a stator comprises a split stator core and slots formed between the teeth, and protrusion-formed coils each being made of a flat rectangular conductor and placed in the slots. Each protrusion-formed coil has a shape including, in a coil end portion, a lead-side protrusion or a non-lead-side protrusion formed to protrude upward in an axial direction of the stator core from a first oblique side portion, a second oblique side portion, a third oblique side portion, and a fourth oblique side portion, and a first oblique side portion, a second oblique side portion, a third oblique side portion, and a fourth oblique side portion. The lead-side protrusion or the non-lead-side protrusion is designed with a height to avoid interference between the protrusion-formed coils placed in the stator core.

Abstract: It is an object of the invention to provide a technique for easily controlling the output characteristic of a brushless motor in a power tool by adjusting the number of turns of a coil that forms a stator winding. A power tool has a brushless motor which includes a rotor 133 having a permanent magnet, a cylindrical stator, and three-phase stator windings which are installed on an inner circumferential side of the stator and rotationally drive the rotor. A plurality of slots are formed in an inside surface of the stator at predetermined intervals in a circumferential direction. Each of the three stator windings is formed by a plurality of coils wound through the slots of the stator and connected to each other. The total number of turns of the coils wound through the slots in each phase is the same in the three phases and not a multiple of the number of the slots in each phase.

Abstract: Disclosed is a method of manufacturing a stator for an electric rotating machine. The method includes the steps of: (1) forming a plurality of planar electric wires, each of the planar electric wires including a plurality of in-slot portions to be received in slots of a stator core and a plurality of turn portions to be located outside of the slots to connect the in-slot portions; (2) rolling each of the planar electric wires through plastic deformation into a spiral or circular-arc shape; (3) forming a hollow cylindrical stator coil by assembling the rolled electric wires through operations of making relative axial movement therebetween; and (4) assembling the stator core and the stator coil together to form the stator.

Abstract: Disclosed herein is a spindle motor including: a base; a sleeve fixedly coupled to an inner side of the base; a core coupled to an upper portion of the base and having a coil wound therearound; a shaft inserted into an inner diameter of the sleeve and rotatably mounted; a hub having the shaft coupled to a central portion thereof and having a magnet attached thereto, the magnet being formed to face the core; and a gas adsorbing part formed under the core so as to be spaced apart from the core. According to a preferred embodiment of the present invention, the gas adsorbing part is formed at an inner portion of the spindle motor to remove outgas that may be generated at the inner portion of the spindle motor, thereby making it possible to improve the performance and the operational reliability of the spindle motor.

Abstract: A system for mounting an electrical element and supplying it with a source of electrical power comprises a magnetic circuit base having first and second spaced magnetic elements having an electrical insulator there between. Each of said magnetic elements is electrically connected to a lead of said power source and an element mount comprising first and second electrically conductive mounting portions having an electrical insulator there between. Each of said mounting portions have an electrical lead secured thereto for supplying power to the electrical element, wherein a first mounting portion is electrically connected to the first magnetic element and a second mounting portion is electrically connected to a second magnetic element.

Abstract: An AC motor having loop windings is provided, which is able to reduce unbalance of three-phase impedance to enhance the motor efficiency. Three loop windings of the three phases are interlinked with magnetic fluxes ?u, ?v and ?w of the respective phases to provide magnetic paths of the three phases. The magnetic paths of the three phases are connected to the respective stator poles of the three phases to configure the motor. The magnetic path of each of the three phases is formed by processing an electromagnetic steel plate using bending to provide a motor configuration having multiple stator poles. Magnetic fluxes of two or more stator poles of the same phase are collected to a single magnetic path to form a three-dimensional three-phase magnetic path without allowing close contact with a magnetic path of a different phase.

Abstract: Apparatuses, systems, and methods provide for high density laminated sheet windings in axial and radial flux configurations. According to embodiments described herein, motor components such as a rotor or stator include a number of stacked sheets of conductive material. The stacked sheets are electrically connected in series to create a winding. Each motor component includes a number of conductors spaced apart with apertures between. The motor components are stacked and configured with the conductors of one rotor or stator positioned within the apertures of the other rotor or stator to create a thin, high density conductor. A magnemotive force is created when the magnetic flux is positioned over the conductors.

Abstract: A synchronous reluctance motor system is disclosed. The system may generally comprise an input power source that provides alternating phase current and voltage (e.g., AC current). The input power may be further conditioned through a variable voltage conditioner. The system may also include capacitive elements connected in series with the motor windings.

Abstract: Provided is a synchronous motor including a rotor having magnetic poles distributed circumferentially along a rotation direction of the rotor at equal intervals, and a stator having stator teeth arranged circumferentially along the rotation direction of the rotor, each tooth wound with a stator coil by concentrated winding. Every M consecutive stator teeth belong to one of stator teeth groups arranged at equal intervals. The M consecutive stator teeth in each stator teeth group are arranged at intervals different from the intervals of the magnetic poles of the rotor. The stator coils wound around the M consecutive stator teeth are connected to separate terminals. A motor driver supplies currents of different phases to the stator coils via the respective terminals.

Abstract: A plurality of shaped wires, which are obtained by shaping electric wires, are assembled to form a wire assembly 47. The wire assembly 47 is then rolled around a core member 6 with aligning members 7 being inserted into spaces 472 formed between adjacent ones of straight superposed parts 471 of the wire assembly 47.

Abstract: A stator for a multi-phase electric motor comprises a plurality of teeth for each phase. The windings on two teeth from one phase are formed from a single length of conductor. The windings on a first one of the teeth being formed at least in part from two sections of the conductor spaced apart along the length of the conductor, and the windings on a second one of the teeth being formed from an intermediate section of the conductor between the spaced apart sections.

Abstract: A polyphase electrical machine, in particular, a polyphase generator, includes a stator which features a core body having a circumferential slot pitch, and a winding configuration having a plurality of windings. It is provided that each winding and each slot of the group of slots that extends over one pole pitch is assigned to one of the phases, and the windings have winding sections that lie in assigned slots and between which, in each case, a winding-head connection is formed, the winding-head connections of different windings being disposed radially in layers relative to each other, and the number of phases being five. A method for producing a polyphase electrical machine is also provided.

Abstract: A stator for an electric machine includes a stator winding located at a stator core. The stator winding has one or more phases, each phase including a single unitary conductor having at least two conductor segments arranged in an electrically parallel relationship. A connection portion is formed in the single unitary conductor between a first conductor segment and a second conductor segment of the at least two conductor segments to connect the conductor to an electrical component.

Abstract: The present invention provides a cylindrical magnetic levitation stage which includes a cylindrical substrate used to form micro-patterns of various arbitrary shapes on a large-area semiconductor substrate or display panel substrate, a cylindrical substrate, a combination of a first permanent magnet array and a first coil array and a combination of a first permanent magnet array and a first coil array, which are coupled to the cylindrical substrate, so that levitation, axial translation and rotation of the cylindrical substrate can be made finely through the control of a magnetic force generated by the interaction between a magnetic field generated by electric current applied to the coil arrays and a magnetic field generated from the permanent magnet arrays corresponding to the coil arrays.

Abstract: An outer-rotor salient-pole concentrated winding motor includes a salient-pole concentrated winding stator and a rotor. The salient-pole concentrated winding stator includes stator core, coils and insulators. The stator core has a plurality of teeth that extend outward in a radial direction of the stator. Each of the insulators includes a projecting engaging portion and a recessed engaging portion. The projecting engaging portion projects outward in the circumferential direction. The recessed engaging portion is formed so that an outer separation wall of the insulator is recessed inward in the circumferential direction. The projecting engaging portion and the recessed engaging portion of adjacent insulators engage with each other when the teeth are inserted into the insulators.

Abstract: The present invention relates to an electromotive part of an elevator drive, comprising a rotor (24) and a stator (10, 22), wherein windings of the stator and/or the rotor (24) are provided as single tooth windings. An electromotive part of an elevator drive, is provided as an internal rotor motor, and includes a rotor and a stator. Windings of the stator and/or the rotor are provided as single tooth windings, the windings are, at least in part, encapsulated, and the windings are provided as two-layer windings. A method for winding-up windings of an electromotive part of an elevator drive with two-layer windings, includes inserting the windings of individual phases as alternating upper and lower layers.

Abstract: A stator coil for an axial gap electrical rotating machine includes first coil pieces, second coil pieces, and an annular base member having recesses for arranging and holding the first and second coil pieces in back and front faces of the annular base member. The first and second coil pieces are arranged in a circumferential direction of the annular base member in the recesses in both back and front faces of the base member. The first joint portion of one first coil piece faces and is connected to the first joint portion of another first coil piece. The second joint portion of one first coil piece faces and being connected to the second joint portion of another second coil piece or the third joint portion of one second coil piece to provide a coil loop.

Abstract: An alternator comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities.

Abstract: A linear motor including permanent magnets fixed on an elongate yoke such that polarities of the permanent magnets alternately change, and an armature having cores and coils wound on the respective cores, wherein each row of the permanent magnets and the armature are moved relative to each other along a straight line by application of an electric current to the coils, each core extending in a first direction perpendicular to the permanent magnet row, the cores being arranged in a second direction perpendicular to the first direction and disposed on the cores such that the coils on the cores adjacent to each other are arranged in a zigzag pattern and spaced apart from each other in the first direction, with a gap left therebetween, wherein the armature includes a heat pipe having opposite end portions one of which is inserted in the gap and the other of which extends outwardly of the gap, and fins fixed to the other end portion of the heat pipe.

Abstract: A rotating electrical machine includes: a stator that has a stator core and a stator coil; and a rotor disposed rotatably on an inner circumferential side of the stator core. The stator core includes a plurality of slots opening on the inner circumferential side and the slots are each formed as an open slot with a width of an inner circumferential-side opening thereof ranging along a circumferential direction set substantially equal to or greater than a width of a bottom side measured along the circumferential direction. The stator further includes a slot insulator disposed between inner wall of each of the slots at the stator core and the stator coil and a holding member constituted with a nonmagnetic material and inserted in each of the slots at the stator core so as to hold the slot insulator between two side surfaces present along the circumferential direction at the slot. The stator is formed by winding the stator coil through the plurality of slots.

Abstract: A motor assembly comprising a motor unit having a first end and a second end and being couplable adjacent the first end of the motor unit to an external electrical device, the motor unit comprising at least one motor winding extending between the first and second ends and an electrical return path extending from the second end to the first end, the electrical return path being in electrical contact at the first end with an electrical connector for supplying impressed secondary power to the external electrical device, wherein the first end of the motor unit is provided with means for coupling a power source to the motor winding and the second end of the motor unit is provided with means to electrically couple the motor winding to the electrical return path.

Abstract: A stator assembly for an electric motor includes an annular core centered about an axis of rotation of an inner rotor which the stator assembly surrounds. The stator assembly has a plurality of electrical windings, each wound in a respective spiral around the outer surface of the core and arranged for current to flow in the windings. In some embodiments, the respective spirals are spaced from and parallel with one another. The stator assembly may have pole pieces that substantially enclose the core and windings. The pole pieces may be configured to taper both radially outward and axially inward to thereby concentrate flux from the core to an inner surface of the pole pieces facing the rotor.

Abstract: A two-phase or four-phase electric machine includes a first stator part and a second stator part disposed about ninety electrical degrees apart. Stator pole parts are positioned near the first stator part and the second stator part. An injector injects a third-harmonic frequency current that is separate from and not produced by the fundamental current driving the first stator part and the second stator part. The electric angular speed of the third-harmonic rotating field comprises p · ? t , where p comprises the number of pole pairs, ? comprises a mechanical angle and t comprise time in seconds.

Abstract: A system and method of manufacturing an electric machine comprising a rotor and a stator, wherein the stator comprises a fractional-slot concentrated winding having two sets of terminals, wherein a first set of terminals configures the fractional-slot concentrated winding to have a first pole-number (P1), and wherein a second set of terminals configures the fractional-slot concentrated winding to have a second pole number (P2) different from the first pole-number (P1).

Abstract: A stator winding is manufactured by a forming step, a winding step, and a expanding step. In the forming step, an S-shaped offset shape is formed on a conductor part corresponding to a coil end part. Thereby, in a coil end part, it is possible to provide an expected shape stably at the coil end part. The conductor is wound around a bobbin in the winding step. In the winding step, a twisted shape is given to the conductor parts to be the inclined part of the coil end and the conductor part to be accommodated in a slot. In the expanding step, a preform product removed from the bobbin is expanded into a shape of the stator winding.

Abstract: In an electric rotating machine, a stator coil is comprised of first and second winding groups. The stator coil is wound around a stator core in a concentrated winding manner so that the phase difference in electrical angle between each corresponding pair of windings of the first and second winding groups is equal to ?/6. Further, the windings of the first and second winding groups are connected to form ?-Y connections. Consequently, the sixth harmonic components of the electromagnetic forces created by the windings of the first winding group can be offset by those of the electromagnetic forces created the windings of the second winding group. As a result, the total magnetic noise and torque ripple generated in the machine can be reduced. Moreover, the machine can be driven with only a single three-phase inverter to achieve the effects of reducing the total magnetic noise and torque ripple.

Abstract: A stator has conductor segments serially wound on a core. Each segment inserted in one of slots of the core has a slanting portion protruding from the slot and inclined toward circumferential and axial directions of the core. Each slanting portion has an oblique portion with a film removal surface and a film removal portion with a film removed surface to have a slanting removal area covered with no insulation film and extending on the oblique portion. Each film removal portion has a connection portion on an end thereof. The connection portions are aligned along a radial direction of the core to form a plurality of end pairs. The connection portions of each end pair are connected with each other so as to serially connect the segments with one another.