Abstract: According to one embodiment, there is provided a 3-phase even-numbered-pole 2-layered armature winding housed in 45 slots per pole provided in a laminated iron core. In each coil piece group of each phase belt, the coil pieces of the second and fifth parallel circuits are placed in the second positions from the pole center among three positions of coil pieces in corresponding coil piece group. In six or four groups out of ten coil piece groups of each phase belt, coil pieces of the first or fourth parallel circuit are placed in the first position from the pole center. In first and second coil piece groups, coil pieces of the first or fourth parallel circuit are placed in different-numbered positions from the pole center.

Abstract: Rotating machinery of the invention includes a 2n-pole rotor, 72n slots, and three-phase armature windings (n?1). Each of the slots houses a top coil on an inner radius side of the slots and a bottom coil on an outer radius side thereof. Each of the armature windings is formed by connecting the top and bottom coils and has 2n phase belts per phase. Each of the phase belts includes a first parallel winding and a second parallel winding. The top and bottom coils are formed by arranging the first and second parallel windings in a predefined order when a circumferential mean position of all top coils and bottom coils in each of the phase belts is defined as a phase belt center and an arrangement of the first and second parallel windings in at least one phase belt is viewed in an order of proximity to the phase belt center.

Abstract: A rotating electrical machine includes a rotor core, a rotor shaft, a coil, a bind, a lead-out wire of which one end is connected to the coil and the other end is connected to a neutral ring. A filling is filled between the coil and the neutral ring. The neutral ring is formed with a plurality of members that are connected with one another to have flexibility.

Abstract: A torque sensor includes a bobbin that includes a plurality of first inclined guide paths inclined at a predetermined angle relative to an axial direction and a second inclined guide paths inclined at a predetermined angle relative to the axial direction in a direction opposite, first and fourth detection coils formed by winding insulated wires around the bobbin along the first inclined guide paths, and second and third detection coils formed by winding insulated wires around the bobbin along the second inclined guide paths. The first to fourth detection coils each form a plurality of layers laminated on the outer surface of the bobbin. The layers of the second and third detection coils are interposed between the plurality of layers of the first and fourth detection coils. The layers of the first and fourth detection coils are interposed between the plurality of layers of the second and third detection coil.

Abstract: In a brush holder accommodating part 26d of a gear housing 26, paired flat surface parts 26c and paired curved parts 26b are alternately disposed so as to be formed into an elliptical shape, one of the paired flat surface parts is formed with first heat sinks 26i, and two brushes 20 and 20 mounted on a brush holder unit 19 accommodated in the brush holder accommodating part 26d are disposed near the first heat sinks 26i.

Abstract: An electric machine includes an outer stator having a plurality of windings, an inner stator having a plurality of permanent magnets and arranged within the outer stator in concentric relationship to the outer stator, and a rotor arranged between the outer stator and the inner stator in concentric relationship to the outer and inner stators and movable relative to the outer and inner stators. The rotor includes a mounting element which is made from a non-magnetic material and has a plurality of recesses, with a magnetically soft segment being arranged in each of the recesses. A first cooling device cools the permanent magnets of the inner stator.

Abstract: An electric machine has grooves and windings, divided into strands, of electrical conductors. At least one strand has a number s of coils connected in series and arranged in the grooves. Each coil has sub-conductors connected in parallel and arranged in bundles. Each bundle is arranged in a groove at a bundle position relative to a deepest possible bundle position in the groove. The positions of all bundles in all coils define a number b of possible bundle positions of the strand. The bundles are interchanged between the coils such that each bundle is arranged in the grooves at least n times and at most n? times at each possible bundle position, wherein n is the integer quotient in regard to the quotient of the number s and the number b, wherein n?=n if s is divisible by b and n?=n+1 if s is not divisible by b.

Abstract: An auxiliary winding for use in an engine-driven generator system is disclosed. The auxiliary winding is separate from but resides with the main winding in the stator slots of an alternator in the generator system. The auxiliary winding is configured to utilize the fundamental component of the flux in the airgap of the alternator along with selected spatial harmonic components to provide power to an automatic voltage regulator during all operating conditions.

Abstract: An armature including a core that includes plural teeth extending in a radial shape, and that has a slot formed between each of the plural teeth; a plurality of first winding coil sections formed by winding coil wire plural times spanning different respective sets of least two of the teeth, while shifting by one slot each time toward one side in the circumferential direction of the core; and a plurality of second winding coil sections formed by winding coil wire plural times spanning different respective sets of least two of the teeth, while shifting by one slot each time toward the other side in the circumferential direction of the core.

Abstract: A converter device includes: a converter circuit unit converting alternating-current voltages from a ? connection and a Y connection of a twelve-phase rectification transformer, into a direct-current voltage; a current detection unit detecting a current of a direct-current bus connected to the converter circuit unit; an open-phase detection unit connected to a side of the ? or Y connection to detect whether open phase is caused in the connection connected thereto; and an output unit outputting, when detected that there is open phase caused in the ? or Y connection based on a detection signal of the open-phase detection unit and a current value of the direct-current bus detected by the current detection unit, an indication that open phase is caused in the ? or Y connection. When open phase is caused, it is possible to output an indication of whether the open phase is caused on the ? or Y connection side.

Abstract: An image forming device includes: a conveyance unit; an image forming section; a plurality of storage units; and a sheet feeding roller, wherein provided are: one drive source; a first drive transmission system including a first one-way clutch; a second drive transmission system including: a second one-way clutch; and a first transmission interrupting unit; a third drive transmission system including: a third one-way clutch; and a second transmission interrupting unit; and a control unit, and the control unit is configured to: rotationally drive the drive source in the first direction at the time of the sending operation by the first sheet feeding roller; rotationally drive the drive source in the second direction at the time of the sending operation by the second sheet feeding roller; and rotationally drive the drive source in the second direction at the time of the sending operation by the third sheet feeding roller.

Abstract: According to one embodiment, there is provided a 3-phase 2-pole 2-layer armature winding, housed in 72 slots provided in a laminated iron core, a winding of each phase including six parallel circuits separated into two phase belts. Upper coil pieces of first and fourth parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, and lower coil pieces of the first and fourth parallel circuits are placed at 1st, 6th, 9th, and 10th positions, upper and lower coil pieces of second and fifth parallel circuits are placed at 2nd, 5th, 8th, and 11th positions, and upper coil pieces of third and six parallel circuits are placed at 1st, 6th, 9th, and 10th positions, and lower coil pieces of the third and six parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, from the center of a pole.

Abstract: An axial flux electrical machine comprises a substantially sealed housing (10) defining a fluid flow path (20), a heat exchanger (22) for transferring heat energy from a fluid flowing in the fluid flow path to another fluid, a stator (16) located within the housing (10), a rotatable shaft (12), a rotor (18) located within the housing (10) on the shaft (12) adjacent the stator (16) and rotatable with respect to the stator (16), wherein the fluid flow path extends between the stator (16) and the rotor (18).

Abstract: A magnet element (37) and a method of its manufacture for assembly into a rotor (38), the magnet element (37) having magnetic domains aligned anisotropically to form a domain alignment pattern (42), wherein the magnetic domain alignment pattern (42) in the magnet element (37) has an orientation that varies substantially continuously across at least part of the magnet element (37) between its lateral edges from at least partially radial to at least partially tangential.

Abstract: The present invention relates to an electric machine, in particular a brushless permanent magnet motor, provided with a rotor and a stator which has a plurality of teeth with winding phases provided thereon, wherein each winding phase has at least four windings, wherein, of the at least four windings of a winding phase, in each case two windings are connected in series with one another, and wherein these windings which are connected in series are connected in parallel. The present invention also relates to a steering device.

Abstract: A distributed winding arrangement for an electric motor is provided that reduces brush arcing while reducing the size of the commutator. The electric motor is comprised generally of an armature having a plurality of spaced apart posts defining a plurality of spaced apart winding slots; a stator disposed coaxially with the armature; and a commutator having a plurality of commutator bars, where the number of commutator bars is an integer greater than the number of winding slots but less than twice the number of winding slots provided by the armature.

Abstract: According to one embodiment, there is provided a 3-phase 2-pole 2-layer armature winding, housed in 72 slots provided in a laminated iron core, a winding of each phase including six parallel circuits separated into two phase belts. Upper coil pieces of first and fourth parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, and lower coil pieces of the first and fourth parallel circuits are placed at 1st, 6th, 9th, and 10th positions, upper and lower coil pieces of second and fifth parallel circuits are placed at 2nd, 5th, 8th, and 11th positions, and upper coil pieces of third and six parallel circuits are placed at 1st, 6th, 9th, and 10th positions, and lower coil pieces of the third and six parallel circuits are placed at 3rd, 4th, 7th, and 12th positions, from the center of a pole.

Abstract: A vehicle drive device that has a stator and a rotor disposed on the inside of the vehicle wheel and drives the wheel, wherein the whole stator can be intensively cooled without causing an increase in production costs. The vehicle drive device comprises: the stator that has a stator core (20) and a hollow stator coil (30), is arranged on the inside of the rotating vehicle wheel (10), and electrically generates magnetic force; the rotor that has permanent magnets (11) connected to the wheel (10), and applies rotational force to the wheel (10) using the magnetic force of the stator; a cooling medium that flows through the hollow section of the stator coil (20); and a first radiator unit (50) that releases heat from the cooling medium.

Abstract: A stator for an electric rotary machine includes: a stator core having a plurality of slots; and segmented coils of a plurality of phases (for example, coils 50 in the embodiment), wherein: the segmented coils of a plurality of phases have pluralities of coil bars which are inserted individually in the plurality of slots in the stator core and which extend substantially in a straight line and pluralities of connection coils which connect together the coil bars of the same phase to thereby make up extending portions; the connection coils each comprise an inner connection coil and an outer connection coil which are disposed in different axial positions; and the inner connection coil faces an outer connection coil of a different phase in an axial direction and the outer connection coil faces the inner connection coil of a different phase in the axial direction.

Abstract: One embodiment provides a stator for an electric rotary machine, the stator including: a stator core having plural slots; segmented coils of plural phases; and a pair of base plates provided at both ends of the stator core, wherein the segmented coils have plural substantially-straight coil bars which are respectively inserted in the slots in the stator core and plural connection coils which are disposed on the base plates so as to connect together the coil bars of the same phase, and wherein the stator core and the coil bars make up a stator core assembly and the base plates and the connection coils make up base plate assemblies, so that the stator is made up of the stator core assembly and the base plate assemblies.

Abstract: Redundant winding connections for multiphase electric machines are disclosed. According to one aspect, a multiphase machine having redundant winding connections includes: a first set of N coils operating as a first winding group, wherein each coil in the first winding group operates at a different phase from the other coils in the first winding group and wherein N is an integer greater than three; a second set of N coils separate from the first set and operating as a second winding group, wherein each coil in the second winding group operates at a different phase from the other coils in the second winding group and wherein the failure of one of the coils in the first winding group does not affect the function of the second winding group.

Abstract: A wound field flux switching machine with a sinusoidal back electromotive force features a rotor with teeth and a stator with groups of teeth wherein each group has a field winding and each tooth has a phase winding.

Abstract: A rotating electric machine includes a hollow cylindrical stator core and a stator coil mounted on the stator core. The stator core has a plurality of slots that are arranged in a circumferential direction of the stator core. The stator coil is formed of a plurality of substantially U-shaped electric conductor segments to include at least one ?-Y connection. The ?-Y connection includes a ?-connected first three-phase winding and a Y-connected second three-phase winding. The first three-phase winding includes three phase windings that are ?-connected to define three terminals of the first three-phase winding therebetween. The second three-phase winding includes three phase windings that are respectively connected to the three terminals of the first three-phase winding. Further, the number of turns of the first three-phase winding and the number of turns of the second three-phase winding are respectively set to two different odd numbers.

Abstract: A traction motor for an electric vehicle, comprises a stator and a rotor rotatably mounted to the stator. The rotor comprises a rotor core and magnets fixed to the rotor core. The rotor core has 2P rotor poles formed by the magnets, P being an integer greater than one. The stator comprises a stator core having S teeth and field windings wound on the teeth, S being equal to 3·m·P where m is the number of phases. Field windings of each phase comprises P winding units. Each the winding unit comprises a first coil and a second coil connected in series. The first coils have a larger coil pitch and a greater number of turns compared to the second coils.

Abstract: A conductor for a coil of a rotating electrical machine that includes a conductor wire bundle formed by gathering a plurality of conductor wires and a flexible insulating covering material that covers a periphery of the conductor wire bundle. The conductor has an intra-covering gap formed inward of the insulating covering material in a radial direction so that the conductor wires can move relative to each other in the intra-covering gap, and a cross-sectional shape of the insulating covering material along a perpendicular plane that is perpendicular to an extending direction in which the conductor wire bundle extends can be deformed.

Abstract: A method for re-powering a star-connected stator having a plurality of parallel stator slots, wherein a plurality of stator winding bars having external winding connections are disposed in stator slots includes bridging the external winding connections so as to connect the stator winding bars in series and to form a polygonal stator capable of producing a polyphase alternating current.

Abstract: A motor for actuating brake members of an electric parking (EPB) system, includes a stator and a rotor rotatably mounted to the stator. The rotor has a shaft, a commutator, a rotor core fixed to the shaft, and rotor windings wound about teeth of the rotor core and electrically connected to segments of the commutator. The rotor windings have a plurality of winding units and each of the winding units have at least two coils. The coils of each winding unit are wound about the same teeth and are connected to a same pair of segments.

Abstract: In one possible implementation, a method for forming a motor winding is provided which includes compressing a Litz wire to form a compacted Litz wire and forming the winding with the compacted Litz wire. In one possible embodiment, a motor winding is provided that has a high density multi-conductor wire bundle comprises of compacted Litz wire.

Abstract: A motor stator automatically assembling system includes a feeding unit, a wire-winding unit, a first conveyer unit, a second conveyer unit, a first assembly unit and a second assembly unit. A motor stator automatically assembling method includes: the feeding unit is operated to feed a plurality of insulation members; the insulation members are arranged on the first conveyer unit to convey to the wire-winding unit; the wire-winding unit is operated to wind wires on the insulation members to form a plurality of wire-wound insulation members; the wire-wound insulation members are arranged on the second conveyer unit to convey to the first assembly unit; the first assembly unit is operated to insert pole teeth into the wire-wound insulation members to form a plurality of compact pole tooth sets; the second assembly unit is operated to combine the compact pole tooth sets with a stator ring frame to form an assembled motor stator.

Abstract: The present invention relates to a rotor for an X-ray tube. In order to provide further possibilities for weight reduction in X-ray tubes for providing an increase of rotation frequency, a rotor (10) for an X-ray tube is provided, comprising a rotational structure (12) with a plurality of electrically conducting elements (14), the ends thereof connected to each other and provided such that an external stator magnetic field generated by a stator induces a current in the electrically conducting elements, which current generates a rotor magnetic field to interact with the stator magnetic field. At least the plurality of electrically conducting elements is made from carbon composite based material.

Abstract: An armature includes an armature core, teeth, a commutator, concentrated winding wires, and distributed winding wires. Each of the teeth includes a first branch portion and a second branch portion. Each of segments in the commutator has a riser. A start end and a terminal end of the concentrated winding wire are pulled out separately in a direction getting closer to the commutator and in a direction away from the commutator. The conductor between the concentrated winding wires is hooked by the riser by which the conductor between the other concentrated winding wires is not hooked. A start end and a terminal end of the distributed winding wire are pulled out separately in a direction getting closer to the commutator and in a direction away from the commutator. The conductor between the distributed winding wires is hooked by the riser by which at least one of the conductor between the concentrated winding wires and the conductor between the other distributed winding wires is not hooked.

Abstract: Described herein is a ball joints universal rotary motor, a manufacturing method and a working mechanism thereof. The ball joints universal rotary motor comprises a housing, a spherical-cap shaped stator body, and a rotor body configured to be secured within the stator body. The stator body is made from a permanent magnet. The rotor body comprises multiple layers of armatures and multiple spacer layers. The multiple layers of armatures are symmetrically distributed along the axis of the rotor body. A spacer layer is provided between two adjacent layers of armatures. The multiple layers of armatures and multiple spacer layers are securely connected by a bolt. The bolt and the rotor body are axially connected. The rotor body is of a spherical shape. Each layer of the armatures is wound with two layers of coils: a first layer and a second layer. The motor as provided is configured to realize movement in multiple directions.

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: The invention has an object to provide a stator including coils that protrude less in the radial direction of the stator and can be made smaller in the radial direction of the stator, and a method of manufacturing the same.

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: A stator system for an electric motor has multiple coil formers and stator windings that are wound on the coil formers. The stator windings are distributed over the circumference of the stator system and are arranged to form a substantially circular stator star. A number of the stator windings are electrically insulated in the axial direction in each case by way of a phase separator. The stator windings in each case of two coil formers are electrically connected as a coil pair in an electrically conductive manner by a conductor track. The conductor track is retained by a separating web that is arranged in the axial direction above the allocated phase separator and that extends in a radial direction.

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: An electric motor comprising a rotor which has a plurality of permanent magnets arranged along a circumferential direction, a stator arrangement with a winding arrangement which surrounds, at least in parts, the permanent magnets. Said stator arrangement comprises a first stator having a plurality of windings and the stator arrangement comprises a second stator, the windings of the first and second stators being embodied, respectively as frame-shaped coils, said coils of the first stator being arranged in the radial direction on the outside of the permanent magnets, the coils of the second stator being arranged in the radial direction inside the permanent magnets, and the coils are arranged along the winding axis thereof in the radial direction and the permanent magnets are arranged along the magnetization direction thereof in the radial direction.

Abstract: A coil that is wound around a core having a plurality of slots arranged so as to be distributed in a circumferential direction of a cylindrical core reference plane, and that has N (where N is an integer of 2 or more) star connections. Each of the N star connections includes three phase coil portions corresponding to respective three phases, and first ends of the three phase coil portions are connected together at a neutral point that is formed independently for each of the star connections, second ends of the N phase coil portions of the same phase which are included in the different star connections are connected to each other, a phase coil placement region where the phase coil portion is placed is designed to be continuous in the circumferential direction.

Abstract: A stator includes a cylindrical core with a plurality of longitudinally extending slots, a first winding set formed as a first cascaded wire in two radial layers of the slots, a second winding set formed as a second cascaded wire in two other radial layers of the slots, and a jumper connecting the first and second wires. A first winding set may have three cascaded phase wires in first and second layers of the slots, and a second winding set may have three cascaded phase wires in third and fourth layers of the slots. A winding set of a first phase may have a first cascaded wire in two radial layers of a first one of the slots, and a winding set of a second phase may have a second cascaded wire in two other radial layers of the first one of the slots.

Abstract: A double stator permanent magnet machine includes an inner stator having a back iron and a set of inner stator poles connected to the back iron, a rotor having a shaft and a set of segments, each segment having a permanent magnet, adjacent the inner stator and rotatively coupled to the inner stator, an outer stator having a set outer stator poles, adjacent the rotor and rotatively coupled to the rotor, a set of inner windings disposed between each of the inner stator poles, and a set of outer windings disposed between each of the outer stator poles.

Abstract: A permanent magnet excited electric machine includes a stator and a moving part movable relative to the stator. One of the stator and moving part has an electric winding system in the form of a single or multiple 3-phase system. The other one of the stator and moving part has permanent magnets. The winding system, in the form of a delta connection, has an inductance such that the related total reactance xB during rated operation according to xB=?B·LY·PB/(Z3P·Ui,B2) is at least 0.8, wherein B is the electric angular frequency of the winding system during rated operation, LY is the phase inductance of the winding system in star connection, PB is the power of the machine during rated operation, Z3P is the number of 3-phase systems of the machine, and Ui,B is the amount of the induced conductor voltage during rated operation.

Abstract: A rotating electrical machine includes a stator having a stator core and a plurality of groups of coils formed by inserting a plurality of unit coils into slots of the stator core in a lap winding manner and a rotor rotatably mounted on the stator. The plurality of coil groups includes a first coil group located at an outer circumference side of the stator core and a second coil group located at an inner circumference side of the stator core. The unit coils constituting the second coil group has shorter circumferences than the unit coils constituting the first coil group.

Abstract: An electric motor that can be used in driving a compressor and that incorporates a magnetic gear. The motor has high and low speed stators mounted within a motor casing side-by-side that drive coaxial low and high speed rotors also mounted within the motor casing for rotation and within the high and low speed stators. The high and low speed stators produce rotating magnetic fields that rotate in opposite directions to drive the rotors under application of a multiphase alternating current. The low speed rotor has a set of ferrous pieces, rotating with the low speed rotor and mounted thereon between the high speed rotor and the high speed stator. The ferrous pieces produce a magnetic gearing effect to drive the high speed rotor at a higher speed than the low speed rotor and in an opposite direction to the low speed rotor.

Abstract: The invention incorporates a modular winding system for an electrical machine that includes a plurality of readily assembled modular windings for engaging a plurality of stator teeth of the machine. Windings comprise a pair of opposed legs terminating in upper and lower flanges, and are readily secured together to make consistent electrical contact between adjacent windings.

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: Conductors comprising a U-phase coil, a V-phase coil and a W-phase coil are arranged in multiple slots in a stator forming a rotating electric machine. These U-phase coils, V-phase coils and W-phase coils are equipped with wave-wound parts, which have bridging parts on one end-face side of the stator core, and lap-wound parts, which are adjacent to the wave-wound parts and are formed so as to encircle the one end face and the other end face of the stator core. The wave-wound parts and the lap-wound parts are arranged so as to alternate in the winding direction of the conductors.

Abstract: A dc motor includes a stator having multiple field magnet poles, and an armature having an armature core, armature coils, and a commutator, and brushes brought into contact with the commutator. The armature coils include concentrated winding coil units wound on respective teeth, and connecting wire units that electrically connect each of the concentrated winding coil units together. A segment group of the commutator includes a first segment and a second segment placed adjacent to each other, to which the concentrated winding coil units are connected, the segment group also includes a third segment disposed next to the adjacent placement, and only the connecting wire unit is connected to the third segment. The connecting wire units include connecting wire units that pass through slots and connect each of the concentrated winding coil units together.

Abstract: A rotor in an electric motor has a plurality of permanent magnets arranged along a circumferential direction. The electric motor has a stator arrangement with a winding arrangement which surrounds, at least in parts, the permanent magnets. The stator arrangement includes a first stator having a plurality of windings and a second stator. The windings of the first and second stators are embodied, respectively, as frame-shaped coils arranged along the winding axis thereof in the radial direction. The coils of the first stator are arranged in the radial direction on the outside of the permanent magnets and the coils of the second stator are arranged in the radial direction inside the permanent magnets.

Abstract: A disc-type electric machine with amorphous iron alloy axial magnetic circuit, its stator iron core with an axial center through hole is processed into a cylinder made from amorphous iron alloy lamination, and its outer cylindrical surface is uniformly processed with a plurality of equi-spaced axial armature slots towards the center axial line. In the stator iron core embedded winding assemblies with the same number as the armature slots, each winding assembly comprises a winding wire frame matched with the armature slot, each stator winding arranged respectively in a slot of the winding wire frame and a magnetic conducting body arranged in a through hole of the winding wire frame. The said disc-type electric machine has short axial size, less moving components, small eddy current loss, excellent high-frequency characteristic, low temperature rising, high efficiency, high power density, high material utilization rate and high efficient energy-saving.