Abstract: A washing machine includes a main body defining an outer appearance, a tub disposed within the main body, a main drum rotatably mounted in the tub, a sub drum mounted in the main drum to be relatively rotatable with respect to the main drum, an outer shaft for rotating the main drum, an inner shaft for rotating the sub drum, being disposed inside the outer shaft, and a driving motor having a stator, an outer rotor connected to the inner shaft that is rotatable outside the stator, and an inner rotor connected to the outer shaft that is rotatable inside the stator, wherein the driving motor independently drives the main drum and the sub drum.

Abstract: A stator includes an annular stator core having a plurality of slots arranged in the circumferential direction at predetermined intervals and a stator coil formed of a plurality of electric conductor wires mounted on the stator core. Each of the electric conductor wires has a plurality of in-slot portions received in the slots of the stator core and a plurality of turn portions that connect, on the outside of the slots, adjacent pairs of the in-slot portions. The stator coil has first and second coil end parts and that respectively protrude axially outward from a pair of axial end faces of the stator core. At each of the coil end parts, the turn portions of the electric conductor wires are stacked in a radial direction of the stator core, and the axial heights h1 of the turn portions are set so as to gradually increase from the radially inside to the radially outside.

Abstract: A stator arrangement includes a stator extending in a circumferential direction and plural teeth alternating with plural slots arranged along the circumferential direction. A first wire is arranged in a first slot of the plural slots. A second wire is arranged in a second slot of the plural slots, wherein the second slot is circumferentially adjacent to the first slot. A first converter has an input terminal connected to the first wire and a second converter has an input terminal connected to the second wire.

Abstract: In the rotary electric machine, a cylinder 04a of a ring component 04 is formed in such a way that a fitting outer surface 04c1 of the cylinder 04a of the ring component 04 is fitted to a fitting inner surface 02a of a first housing 02; a clearance value between the fitting outer surface of the cylinder and a fitting inner surface of the first housing is lower than a clearance value between an outer surface, in which the fitting outer surface is excepted, of the cylinder and an inner surface, in which the fitting inner surface is excepted, of the first housing; and a position in a diameter direction of a stator core 3 facing to the first housing is set by above-described fitting process.

Abstract: A stator assembly includes a plurality of stator slots defining multiple slot layers. The assembly includes a plurality of hairpins each having a respective first leg positioned in one of the multiple slot layers and a respective second leg positioned in another of the multiple slot layers. Each hairpin is configured to allow a current to flow from the respective first leg to the respective second leg. The plurality of hairpins is divided into multiple hairpin layers. The hairpins form multiple winding sets, such as first, second, third and fourth winding sets. Each of the winding sets at least partially includes the hairpins from at least two of the multiple hairpin layers. The multiple slot layers may include six slot layers. The multiple hairpin layers may include six hairpin layers. Thus, at least one of the hairpin layers may be “shared” by two winding sets.

Abstract: A plurality of coils C1 to Cm that constitutes a whole winding L of each phase is divided into g coil groups G1 to Gg for each phase. Each coil group is, for example, constituted by coils C1 to C4 wound around four polar teeth continuously disposed. The number of turns of respective end coils C1 to C4 of the coil group is less than the number of turns of central coils C2 and C3. Further, the whole winding L includes n partial windings N1 to Nn, in which a coil Cj (j is an integer in the range from 1 to m) is constituted by n sub coils S(1,j) to S(n,j) that are formed by the n partial windings. It is feasible to set a non-integer value as an effective number of turns of a coil when the number of turns of each sub coil is appropriately selected.

Abstract: A method of inserting a continuous conductor having a rectangular cross-section into slot segments formed in a stator core includes forming a core member having a plurality of slot segments each having an opening and inserting a stator winding having a plurality of phases into select ones of the slot segments. Each of the plurality of phases has at least one conductor including a plurality of substantially straight segments alternately connected by a plurality of end loop segments. A section of the at least one conductor includes three consecutive end loop segments and three consecutive straight segments formed from a single continuous conductor. The method further includes narrowing the opening of each of the plurality of slot segments by forming an annular stator core having a central axis. The three consecutive straight segments are substantially similarly radially spaced from the central axis.

Abstract: Methods and apparatus for a motor generally comprise a motor shell, a drive unit, a motor electronics assembly configured to operate the drive unit, and a shaft coupled to the drive unit. The drive unit may comprise an axial design configured to increase the efficiency of the system. The motor may be totally enclosed, the shaft may be sealed using a labyrinth seal, and the motor electronics assembly may be contained within the motor shell. The motor may comprise shapes and materials to promote cooling by air flow and thermal conduction. The motor may further comprise a touch-sensitive interface, may operate at high speed in response to a signal, and may provide a single location for the connection of all inputs. A motor according to the present invention may have improved operating characteristics.

Abstract: A stator having a first set of phase windings formed by wrapping a conducting wire in a first direction about first, second, and third teeth, a second set of phase windings formed by wrapping, separately in a second direction opposite the first direction, the conducting wire about fourth, fifth, and sixth teeth, a first interconnect wire extending between the winding on the first tooth and the winding on the fourth tooth, a second interconnect wire extending between the winding on the second tooth and the winding on the fifth tooth, a third interconnect wire extending between the winding on the third tooth and the winding on the sixth tooth, and a connection that connects the first, second, and third interconnect wires together.

Abstract: A stator of a rotating electrical machine includes a stator core, plural stator coil groups constituting plural phases, plural pieces of interphase insulation paper for insulation of coils belonging to different phases, and plural connecting strips formed integrally with the interphase insulation paper pieces. Each interphase insulation paper piece has ends inserted between coil ends of unit coils belonging to an identical phase thereby to function as interphase insulation paper for insulation of coils belonging to the identical phase. Each interphase insulation paper piece for insulation of coils belonging to the different phases, functioning as the interphase insulation paper piece for insulation of coils of the identical phase, insulates between coil ends of the first unit coils of respective first and second series circuits constituting the inner circumference side phase and a coil end of the unit coil constituting the outer circumference side phase.

Abstract: A stator assembly includes a plurality of stator slots defining a plurality of slot layers. The assembly includes a plurality of hairpins each having respective first and second legs positioned in respective ones of the slot layers. Each of the hairpins is one of a short-pitched coil, a long-pitched coil and a full-pitched coil. The short-pitched, long-pitched and full-pitched coils are configured to extend over a first, second and third number of the stator slots, respectively. The hairpins may be divided into first, second, third, fourth, fifth and sixth hairpin layers. One of the hairpin layers includes at least one short-pitched coil, and another of the hairpin layers includes at least one long-pitched coil. The first, third and fifth hairpin layers each may include at least two short-pitched coils while the second, fourth and sixth hairpin layers each may include at least two long-pitched coils.

Abstract: In the automotive rotary electric machine stator according to the present invention, a stator winding is constituted by distributed windings, slot-housed portions and root portions of coil end portions are formed so as to have flat cross sections, and the slot-housed portions are housed in the slots in contact with each other so as to line up in a single column in a radial direction such that long sides of the flat cross sections are oriented circumferentially. Flatnesses of root portions of the coil end portions that are radially adjacent and that extend outward in different circumferential directions from the slots are mutually different.

Abstract: The problem to be solved by the present invention is to provide an effective and safe therapeutic preparation for rhinitis, which not only has significant effects on improvement in rhinitis, in particular allergic rhinitis, but also is rapid in manifestation of efficacy, fast-acting, and long-lasting, without local side effects. Means for solving the problem is a therapeutic preparation for rhinitis, in particular allergic rhinitis, comprising C-type natriuretic peptide (CNP) or B-type natriuretic peptide (BNP) as the active ingredient.

Abstract: The problem to be solved by the present invention is to provide a safe and efficacious therapeutic agent for dermatitis which is not only safe and efficacious for patients with dermatitis, in particular atopic dermatitis, but also significantly effective for severe cases that are judged to be intractable by conventional external preparations, and which is also safely applicable to affected areas such as the face and neck, as well as to subjects with sensitive skin, such as infants and females. Furthermore, the invention aims to provide an external preparation that is efficacious as skin care cosmetics having effects to improve elasticity and wrinkles of the skin, moisturizing effects, and hair-growth effects. The means for solving the problem is a skin external-preparation composition, in particular, a therapeutic agent for dermatitis or a skin texture-improving agent, having C-type natriuretic peptide (CNP) or B-type natriuretic peptide (BNP) as the active ingredient.

Abstract: The present invention provides an improved single-layer coil for a rotating or linear electrical machine. The coil has a first endwinding that is substantially straight to a longitudinal axis of the coil and a second endwinding that is bent relative to the longitudinal axis of the coil. The coil therefore has differently shaped endwindings with one end 12 being ‘straight’ and the other end being ‘bent.

Abstract: The invention relates to a method for producing a stator winding (18) of an electric machine (10), in particular of an alternator, the stator winding (18) comprising at least n phase windings (120, 121, 122, 123, 124) and a phase winding (120, 121, 122, 123, 124) having several directly consecutively wound coils (82) having coil sides (88) and coil side connectors (91), the coils (82) being divided into first coils (82.1) and second coils (82.2), by means of a forming tool (100), in which grooves (105, 106; 105?, 106?) suitable for accommodating the coils (82) are provided, a first coil (82.1) being arranged in one groove (105; 105?) and a second coil (82.2) being arranged in another groove (105; 105?), characterized in that n?1 grooves (105, 106; 105?, 106?) are arranged between the first coil (82.1) and the second coil (82.2).

Abstract: An active part of an electrical machine has a carrier, a plurality of coils which are arranged on the carrier and which each include a plurality of sub-conductors and a winding head area, in which the coils project out of the carrier in a curved shape, respectively and are connected to one another. At least one of the plurality of coils has a coil arc in the winding head area, and the center line of the coil runs in one plane in the coil arc. The sub-conductors of one coil run parallel to the plane in the coil arc of the coil and themselves in each case form sub-conductor arcs. The vertices of the sub-conductor arcs of the coil form a line of inclination which runs at an angle to the plane.

Abstract: One embodiment provides a stator of a segmented conductor type electric rotary machine including an annular stator core and coil. On at least one axial end portion of the stator core, the coils are disposed to form a coil end so that plural spanning portions of the coils are arranged continuously in a circumferential direction and so that circumferentially adjacent ones of the spanning portions partially overlap each other as seen in an axial direction. An apex portion of the spanning portion is twisted so that an intersecting state is formed as seen in a radial direction within a range where the spanning portion is exposed as seen in the axial direction.

Abstract: A controller for a multiple-phase rotating machine includes power converters for supplying alternating current to winding sets of the rotating machine. A pair of each electrical power converter and a corresponding winding set forms a system. The controller further includes a failure detector for detecting a failure in each system. The failure causes a braking current in the rotating machine. The controller further includes a control section for setting a d-axis current and a q-axis current to drive the power converter in each system. When the failure detector detects the failure in any one of the systems, the control section stops the power converter in the failed system and sets the d-axis current in the normal system in such a manner that an electric current in the failed system is reduced.

Abstract: A plurality of teeth of an armature core arranged in a circumferential direction each include an inner winding portion in its proximal region and first and second branch portions that extend radially and branch off in a bifurcated manner from a distal end of the inner winding portion in the circumferential direction. After winding the first to ninth coils around the inner winding portions of all of the teeth, the tenth to eighteenth coils are wound sequentially around outer winding portions of adjacent ones of the teeth each including the first branch portion of one of the two adjacent teeth and the second branch portion of the other one of the adjacent teeth.

Abstract: A winding assembly includes: slot-housed portions housed inside each of the slots of the stator core so as to form pairs that line up in an inner layer and an outer layer relative to a slot depth direction; first return portions at a first axial end of the stator core that link end portions of the slot-housed portions housed in the inner layer inside each of the slots and end portions of the slot-housed portions housed in the outer layer inside the slots that are (N?M) slots away; and second return portions at a second axial end of the stator core that link end portions of the slot-housed portions housed in the outer layer inside each of the slots and end portions of the slot-housed portions housed in the inner layer inside the slots that are (N+M) slots away.

Abstract: A method of making an electric motor includes installing a plurality of hairpin coils in a plurality of slots, wherein the plurality of hairpin coils comprise a first hairpin coil and a second hairpin coil, the first hairpin coil comprising a first end and the second hairpin coil comprising a second end. The method further includes inserting the first and second ends into a void of an electrically conductive coupler to electrically connect the first and second ends; and placing the insulation cap over the coupler so as to protect the coupler from contacting other electric conductive materials.

Abstract: A stator of a rotary electric machine includes a stator core and polyphase coils. The stator core has a plurality of slots. The polyphase coils are provided in the slots. Each phase of the polyphase coils has a plurality of coils formed for each pole and connected in parallel. When winding in which a coil pitch is equal to number of slots divided by number of poles is termed full-pitch winding, when winding in which a coil pitch is larger than the coil pitch of the full-pitch winding is termed long-pitch winding, and when winding in which a coil pitch is smaller than the coil pitch of the full-pitch winding is termed short-pitch winding, at least two of the coils of each phase are formed on the stator core by wave winding to alternate between the long-pitch winding and the short-pitch winding along a circumferential direction of the stator core.

Abstract: A stator includes: a stator core having a plurality of slots and teeth parts; and coils each formed by winding a flat conductor and disposed in the slots. Of the corners of the rectangular cross-section of the flat conductor, a first corner located on the inner circumference side of the coil when the flat conductor is wound to form the coil is provided with a round chamfer having a radius larger than that of another corner. When the coil is inserted into the slots of stator core elements, the rectangular cross-section of the coil is disposed such that the first corner faces toward the outer circumference side of the stator.

Abstract: A stator of an electric machine of the power saving interval may include a stator core having a plurality of slots, and a stator winding wound around the slot, wherein the stator winding has a plurality of winding portions connected in parallel with one another for each phase, and each of the winding portions has a segment conductor inserted into three or more slots for each pole. As a result, it may be possible to increase the number of rotations and reduce the external size thereof while maintaining the same output.

Abstract: The invention discloses a connector rack for an electric motor, in particular for an electronically commutable motor having a plurality of exciter windings for a power tool, having at least one electronic mounting board, on which a plurality of contact carriers is provided for electrically contacting the exciter windings.

Abstract: The position of a moveable component which is coupled to an electric machine is ascertained, where the electric machine serves, in the event of manual movement of the component, as a generator for generating electric energy for a position ascertainment arrangement. The coupling of the electric machine with the component is configured such that a magnetic attraction reaction and/or repelling reaction between magnetic and/or magnetized parts of a rotor and of a stator of the electric machine results in a short-term acceleration of the rotor, which is unhindered by the coupling, and in a resulting short-term increase of the electric energy generated.

Abstract: A system for completing an electrical circuit includes first and second base contacts electrically isolated from each other, each having a magnetic portion secured thereto, each magnetic portion having an opposite polarity, and each of said base contacts electrically connected to an electrical lead for transmitting an electrical signal through said base contacts. The system also includes first and second mating contacts electrically isolated from each other, each having a magnetic portion of opposite polarity secured thereto.

Abstract: A brushless, single coil motor without laminations, with an alternate polarity permanent magnetic rotor and a stator having enhanced magnetic properties by soft iron parts backing up both rotor and stator. The stator is having a plurality of wires grouped into packets, where the wires are connected continuously and terminating solely in two free stator lead ends, energized with pulses from a simple electronic circuit, to start and run the motor.

Abstract: An electric machine, such as an Internal Permanent magnet or Synchronous Reluctance machine, having X phases, that includes a stator assembly, having M slots, with a stator core and stator teeth, that is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface that defines a cavity; and a rotor assembly, having N poles, disposed within the cavity which is configured to rotate about the longitudinal axis, wherein the rotor assembly includes a shaft, a rotor core located circumferentially around the shaft. The machine is configured such that a value k=M/(X*N) wherein k is a non-integer greater than about 1.3. The electric machine may alternatively, or additionally, include a non-uniformed gap between the exterior surface of the rotor spokes and the interior stator surface of the stator.

Abstract: A method of fabricating an electric machine stator includes inserting one or more electrical coils into a form and partially curing the one or more electrical coils. The method also includes populating the electric machine stator with the one or more electrical coils and curing the electric machine stator with one or more electrical coils.

Abstract: A method is disclosed for producing a stator winding of an electric machine, in particular an alternator, the stator winding comprising at least one phase winding and the phase winding having a plurality of coils, the plurality of coils being wound in one direction, a given number of turns being wound and the coil having a plurality of coil sides, two coil sides of the coil transitioning integrally into coil connectors. The turns of the coil are subsequently moved relative to each other in such a way that the coil sides transitioning into coil connectors are outermost coil sides of the coil.

Abstract: Dynamic reconfiguration-switching of motor windings in a motor is optimized between winding-configurations by selectively lowering resistance of a constantly used portion of one of the motor windings. Acceleration is traded off in favor of higher velocity upon detecting the electric motor in the electric vehicle is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity.

Abstract: This power generator is so formed that a number q of slots per pole per phase obtained by dividing the number of slots by the number of poles of permanent magnets and the number of phases of voltages is a fraction satisfying 1<q?3/2.

Abstract: Dynamic reconfiguration-switching of motor windings in an electric motor in an electric vehicle is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity upon detecting the electric motor in the electric vehicle is at an optimal angular-velocity for switching to an optimal lower torque constant and voltage constant. The total back electromotive force (BEMF) is prohibited from inhibiting further acceleration to a higher angular-velocity.

Abstract: A broad-pole type square-wave three-phase brushless permanent magnet direct current motor and an assembling method thereof are disclosed. The number of magnetic poles on a rotor core is: 2P=4. The number of slots in a stator core is: Z=6. Six teeth on the stator are composed of three large teeth and three small teeth. The sum of mechanical angels of one large tooth and one small tooth is 120 degree. Electrical angles corresponding to the mechanical angles are: P* 120=240° . Three-phase concentrated windings are wound on three large teeth separately, and only one winding is arranged at each phase. The advantages of the motor are low positioning torque, simple structure, effective production cost, convenient to wind the windings, and low copper loss, etc.

Abstract: Described herein are embodiments of methods and systems of monitoring electrical brushes in electrical rotating machinery. One embodiment of the method comprises continuously measuring at least one parameter associated with an electrical brush; and determining, using the at least one continuously measured parameter associated with the electrical brush, maintenance for the electrical brush.

Abstract: There is provided a bus ring attached to a stator having a plurality of stator teeth aligned in a circumferential direction and a winding wound around each of the stator teeth along an end face of the stator of a rotary electrical machine in an axial direction, and the bus ring is made by curving a conductive wire in an arc shape with a diameter smaller than that of the stator, and staple-shaped bent portions are formed at the conductive wire and the winding is connected to the bent portions. There is also provided a fixing structure of the bus ring configured such that an insulator is interposed between each of the stator teeth and the winding protruding in the axial direction from the end face of the stator to enter inside the conductive wire of the bus ring.

Abstract: An electric progressive cavity pump system includes a progressive cavity pump in operation connection with a six-pole, three-phase electric motor. A method of producing fluid from a wellbore includes the steps of positioning a progressive cavity pump below a fluid level in the wellbore, connecting a six-pole, three-phase electric motor that includes a stator having eighteen slots and a plurality of windings distributed among the eighteen slots, wherein the windings of different phases do not pass through the same slot and operating the progressive cavity pump via the electric motor to produce the fluid from the wellbore. The electric motor may be positioned below the fluid level in the wellbore or at the surface.

Abstract: An electric motor for high-temperature applications. The electric motor includes a rotor and a stator with a hollow-cylindrical, ironless stator winding of stoved-enamel wire. Furthermore, a soft-magnetic return is provided which encloses the stator winding. The stator winding is supported by a hollow-cylindrical supporting sleeve lying radially inside against the stator winding.

Abstract: A spindle motor is provided in which the scattering of contaminating particles are prevented in a stainless steel part used therein. so that a hard disk drive can be prevented from being damaged due to collision between the particles adhered on a magnetic disk surface and a magnetic head. The spindle motor has a fixed portion and a rotating portion in which at least a part of one of the fixed portion and the rotating portion is made of stainless steel, and a metallic film is directly formed on the surface of the stainless steel by electroless nickel plating.

Abstract: An air core motor-generator has a rotor that rotates about an axis of rotation, and a stationary stator that magnetically applies torque to the rotor. The rotor includes magnetic poles that drive magnetic flux across an armature airgap. The stator has an air core armature located in the armature airgap, with windings such that the magnetic flux across the airgap penetrates directly transversely through the windings and induces an AC voltage in the windings as the rotor rotates. The armature windings are wound with wire that is assembled of a stack of multiple individually insulated ribbon conductors connected in parallel to form said wire. The ribbon conductors having a narrow thickness and a width substantially greater than said thickness. The armature is oriented in the airgap with the width of the ribbon conductors extending in the direction across the airgap and oriented parallel to the flux direction.

Abstract: A motor includes a motor case, and a rotor and a stator, which are disposed in the case. The case has a tubular portion, a front cover mounted to an axial end of the portion, and a rear cover mounted to the other axial end of the portion. The rotor has a rotary shaft and the stator includes a plurality of teeth, which extend toward a central axis of the shaft and are circumferentially disposed at equal intervals. Between each circumferentially adjacent pair of the teeth, a slot extending toward the axis is formed. In each slot, a U-shaped segment is inserted in parallel with the axis. The distal ends of the segments projecting out from the slots are electrically interconnected, thereby forming an SC coil including the segments disposed circumferentially. The SC coil includes a receiving terminal, and the terminal includes leads extending in parallel to the axis.

Abstract: A wind turbine including at least one generator is disclosed. The generator includes a stator with two sets of stator windings. The first set of stator windings is connected to a first electrical converter unit by a first cable connection and the second set of stator windings is connected to a second electrical converter unit by a second cable connection. The first cable connection is guided from the respective set of stator windings in the region of the side facing the drive end of the wind turbine and the second cable connection is guided from the respective set of stator windings in the region of the side facing the non-drive end of the wind turbine.

Abstract: A method and apparatus for reducing or eliminating the effects of torque ripple and cogging torque and otherwise improving performance in an electromechanical machine such as a motor or generator. The rotor and/or stator is conceptually sectionalized and the sections spaced apart by amount sufficient to alleviate deleterious aspects of cogging torque and torque ripple. Positioning of the stator teeth or rotor magnets is determined based on the calculated spacing. Conceptual sections may be formed as physically individual segments. Unwound teeth may be disposed in end spaces between sections occupying less than the entire area of the end space.

Abstract: A rotor for a brushless motor is resistant to degradation in alternative fuels and has desirable magnetic properties. A stator for a brushless DC motor includes coils wound both clockwise and counterclockwise around teeth of a back iron. Pairs of the coils are electrically connected in parallel.

Abstract: A method for making a rotary electric machine comprises the steps of: preparing a core (18) having a plurality of pole expansions and a plurality of windings (100, 200, 300) made of electrically conductive material on the pole expansions, where at least a part of the windings (100, 200, 300) is made from a conductor wire having a free end (14) that can be connected electrically to a mains power supply; stably coupling to each other at least two free ends (14) of different windings (100, 200, 300) so as to connect them to a single power supply terminal; twisting the coupled ends (14) together to form a single electrical termination (5, 6, 7) twisted along a principal line of extension of the electrical termination (5, 6, 7).

Abstract: The invention relates to a control device (1) for reducing electrolytic corrosion in a brushless direct-current motor (3). The control device (1) is designed to control phases (9, 11, 13) of the brushless direct-current motor (3). The control device (1) has a potential equalization connection (5) and a potential equalization line (7). The potential equalization line (7) is designed to connect the brushless direct-current motor (3) to the potential equalization connection (5). An anti-corrosion resistor (RK) is provided on the potential equalization line (7), which anti-corrosion resistor is designed to reduce a current flow between the phases (9, 11, 13) of the brushless direct-current motor (3) and the potential equalization line (7).

Abstract: A flat conductor wire in a U-phase first slot of a first group block and a flat conductor wire in a U-phase second slot of a second group block form an outer circumference base unit. A flat conductor wire in a U-phase second slot of the first group block and a flat conductor wire in the U-phase first slot of the second group block form an inner circumference base unit. The inner circumference base unit is located inside the outer circumference base unit. A coil end portion at one end of the inner circumference base unit and a coil end portion side at one end of the outer circumference base unit are bent toward the rotor side with respect to an in-slot conductor portion in the stator core. The coil end portion side at one end of the inner circumference base unit and the coil end portion side at one end of the outer circumference base unit are located further toward the axis of the rotor than an inner peripheral surface of the stator core.

Abstract: A coil strand is wound on an insulator to produce a divided core member, and then the divided core member is placed on a table. While the table rotates about its axis, ends of the coil strands are inserted into lead end holding grooves, which are defined in a surface of the insulator on an outer circumferential edge of a stator and which extend along a circumferential direction of the stator.