Abstract: A high-output and highly efficient axial gap type rotating machine capable of reducing an eddy current generated in a winding wire and supplying a larger current is provided.

Abstract: An electric motor (M) includes first and second stators (12L, 12R) on the outside forming a rotating magnetic field, an outer rotor (13) disposed inside the first and second stators (12L, 12R) and having first and second induced magnetic poles (38L, 38R), and an inner rotor (14) disposed inside the outer rotor (13) and having first and second permanent magnet (52L, 52R). The phases of the first and second induced magnetic poles (38L, 38R) of the outer rotor (13) are displaced from each other by only half of a predetermined pitch, and the phases of the first and second permanent magnets (52L, 52R) of the inner rotor (14) are displaced from each other by only the predetermined pitch. Accordingly, the first and second stators (12L, 12R) facing the first induced magnetic poles (38L) and the second induced magnetic pole (38R) can be made to have the same phase and polarity, thus simplifying the structures of the first and second stators (12L, 12R).

Abstract: Embodiments of the present invention include a composite electromechanical machine which can operate as a motor or a generator (including dynamo or alternator). In an aspect, the present composite electromechanical machine includes at least a double-sided magnetic plane (e.g., rotor or stator) wherein the double-sided magnetic plane includes a plurality of magnet protruding from both sides and exerting substantially equal magnetic field to both sides of the double-sided magnetic plane. The magnets can be permanent magnets or electromagnets having windings. Other embodiments can also be included.

Abstract: A brushless DC motor has at least three stator sections and a single rotor rotating with the three stator sections. Each stator section is wound with three parallel windings having respective three nodes. Each stator section has nine terminals providing independent access to each node so that separate voltages and currents are applied to each parallel winding in the stator section. Thus, the current applied to each stator section is divided substantially equally among the three parallel windings, thereby reducing the current in each winding for the same power requirement for the motor, which reduces the I2R losses in the windings and the supply wiring and reduces the power handling requirements in the electronic switches providing the supply voltages. The three parallel windings are connected to external terminals of the motor to form either a delta winding configuration or a wye (star) winding configuration.

Abstract: A brushless, liquid or air cooled, direct current motor formed from a three stack stator and three section rotor assembly using an integrated water cooled or air cooled housing and over-molding techniques.

Abstract: An electrical energy generator for generating optimal electrical energy at very low wind speeds and at very high wind speeds. The electrical energy generator includes a support assembly having an elongate support member, and also includes a rotor assembly being rotatably disposed upon the support assembly and having a plurality of vanes being movable by air for rotating the rotor assembly, and further includes a stator assembly being mounted upon the support assembly and including a stator member being movably disposed upon the support assembly for generating energy in cooperation with the rotor assembly, and an assembly for moving the stator member relative to the rotor assembly upon the support assembly.

Abstract: A rotary electric machine having plural rotary elements in a non-coaxial arrangement is disclosed. The rotary electric machine includes a housing assembly, at least one stator frame mounted in the housing assembly, at least one stator winding wound on the at least one stator frame, and at least two rotors mounted in the housing assembly having axes of rotation that are non-coaxial, wherein each of the at least two rotors is mechanically decoupled from the other rotors such that each of the at least two rotors rotates independent from one another. The rotary electric machine also includes a control unit, with the control unit including at least one electronic control electrically connected to the at least one stator winding. The control unit is configured to control an exchange of power to or from each of the at least one stator windings.

Abstract: A hybrid motor for powering a compressor of a chiller system includes a first rotor portion and a first stator portion configured as a permanent magnet motor and a second rotor portion and a second stator portion configured as a reluctance motor. The second rotor portion includes a reluctance-type rotor, and the second stator portion includes electromagnetic windings capable of inducing a rotary magnetic field. The first rotor portion and the second rotor portion are attached to a common drive shaft. The reluctance motor is arranged to generate start-up torque and initiate rotation of the drive shaft until the drive shaft achieves a predetermined rotational speed. The permanent magnet motor is arranged to power the drive shaft between the predetermined rotational speed and a maximum rotational speed.

Abstract: An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged close to the outer periphery of the rotor so as to have a difference in angle (?/2) with respect to the center of rotation of the rotor, a differential operational circuit performing differential operation on detection signals output by the magnetic sensors to output a differential signal, and the angle calculating circuit calculating the angle of rotation of the rotating shaft based on the differential signal. The planar shape of the rotor is such that the sum of the distances between the center of rotation and the respective two points where two straight lines crossing at the center of rotation at a crossing angle of (?/2) cross the outer periphery of the rotor is constant, and the planar shape is symmetric with respect to a straight line passing through the center of rotation.

Abstract: A switched reluctance motor includes a stator and a rotor, the stator having stator poles supporting a magnetic field focusing device such as a near field plates on each stator pole tip. An example near field plate has a spatially modulated surface reactance configured so as to focus magnetic flux extending from each pole tip within at least one region of increased magnetic field proximate the pole tip.

Abstract: A fan includes a first motor having a first rotor and a second motor having a second rotor which is rotationally connected to the first rotor. The fan further comprises a first impeller which, when driven by the first motor, rotates along a first direction and creates a main flow along a direction perpendicular to the periphery thereof and a tangential flow along the tangent thereof. The fan also includes a second impeller which, when driven by the second motor, rotates along the reverse direction of the first direction and impel the tangential flow to the direction perpendicular to the periphery of the first impeller.

Abstract: A relative driving device includes a stator; a first rotor; and a second rotor, in which the stator includes a first electromagnetic coil and a first control unit that controls current supplied to the first electromagnetic coil, the first rotor includes a first magnet and a second magnet, the second rotor includes a second electromagnetic coil and a second control unit that controls current supplied to the second electromagnetic coil, the first electromagnetic coil and the first magnet are disposed so as to face each other to form the first driving mechanism, and the second electromagnetic coil and the second magnet are disposed so as to face each other to form the second driving mechanism.

Abstract: A transmission has a motor assembly with a stationary portion surrounding a rotor. The transmission also includes a clutch housing. A transmission casing surrounds the motor and the clutch housing. The stationary portion is rigidly connected to and supported by the clutch housing. Thus, a separate housing for the motor/generator is avoided. The housing may also support one or more motor bearings, seals, clutch pistons, or clutch plates.

Abstract: The invention relates to an electrical machine (1, 2, 210) or its use as a wind power generator and a wind power installation having this electrical machine. The electrical machine has a primary part (3, 4, 222, 212, 213) and a secondary part (5, 6, 224), wherein a disc-like primary part (3, 4, 222, 212, 213) and a disc-like secondary part (5, 6, 224) are provided for forming a disc-shaped air gap, or wherein the electrical machine (1, 2, 210) has a cylindrical primary part (3, 4, 212, 213) and a cylindrical secondary part (5, 6, 224) for forming a cylindrical air gap, wherein a primary part, which can be used for a linear motor, is also used for forming the cylindrical primary part (3, 4, 222, 212, 213).

Abstract: To provide a magnetic machine capable of reducing the ripple and cogging of torque or thrust. An electric motor 1 includes three stators 6 to 8 each having an armature row, a rotor 3 having a permanent magnet row, and a rotor 10 having a soft magnetic material row. The respective phases in electrical angle between magnetic poles generated at respective armatures 6a to 8a of the armature row and the magnetic poles of the permanent magnet row are set to be each displaced in a predetermined direction by an electrical angle of 2?/3, and the respective phases in electrical angle between the magnetic poles generated at the respective armatures 6a to 8a of the armature row and soft magnetic material cores 11b to 13b of the soft magnetic material row are set to be each displaced in the predetermined direction by an electrical angle of ?/3.

Abstract: A reluctance machine includes a stator and a rotor. The stator and rotor have a same number of poles. The rotor is configured to rotate about an axis of rotation. Each stator pole is formed of a primary stator pole and an auxiliary stator pole. The auxiliary stator pole is axially aligned with the primary stator pole in the direction of the axis of rotation. Each rotor pole has a length extending in the direction of the axis of rotation sufficient to at least partially cover the primary stator pole and axially aligned auxiliary stator pole. The primary stator poles are actuated with an alternating magnetic field orientation, and the auxiliary stator poles are also actuated with an alternating magnetic field orientation. The field orientations for the primary and auxiliary stator poles are, however, opposite each other such that a primary stator pole its axially aligned auxiliary stator pole have opposite magnetic field orientations.

Abstract: A generator or motor apparatus having a stator formed of a plurality of pairs of parallel stator segments is provided The pairs of parallel segments are connected together to form a channel in which an annular rotor moves The annular rotor also comprises a plurality of detachable segments connected together to form an annular tram operable to move through said channel Each stator segment comprises a stator winding set and each rotor segment comprises a magnet dimensioned to fit between the parallel spaced apart stator segments The apparatus may include a support structure, the rotor segments being slidably coupled to the support structure and the stator segments being attached to the support structure The apparatus may be a rim generator, wind turbine generator or other electrical machine The stator winding set includes a stator winding, and may include other electrical or electronic components, including possibly a power factor capacitor, direct current filtering capacitor, supercapacitor, and one or more di

Abstract: A polyphasic multi-coil generator includes a drive shaft, at least first and second rotors rigidly mounted on the drive shaft so as to simultaneously synchronously rotate with rotation of the drive shaft, and at least one stator sandwiched between the first and second rotors. A stator array on the stator has an array of electrically conductive coils mounted to the stator in a first angular orientation about the drive shaft. The rotors each have an array of magnets which are circumferentially equally spaced around the rotor and located at the same radially spacing with respect to the centre of the rotor and the drive shaft at a first angular orientation relative to the drive shaft. The arrays of magnets on adjacent rotors are off-set by an angular offset relative to one another.

Abstract: A hybrid cascading lubrication and cooling system (200, 400) for an electrical machine (102) with nested stages is provided. The electrical machine (102) includes an inner nested stage (444) nested with respect to an outer nested stage (446). An oil pump (222) is coupled to an oil pump inlet tube (226) to draw oil from an oil sump (224), and a cooling core (230) to distribute pumped oil within the electrical machine (102). A rotor member (212) is coupled to the inner nested stage (444) and the outer nested stage (446). The rotor member (212) centrifugally pumps oil from the cooling core (230) through inner radial holes (424) and outer radial holes (436) in the rotor member (212) upon rotation about a central axis (216) of the electrical machine (102).

Abstract: A d. c. charged particle accelerator comprises accelerator electrodes separated by insulating spacers defining acceleration gaps between adjacent pairs of electrodes. Individually regulated gap voltages are applied across each adjacent pair of accelerator electrodes. In embodiments, the individually regulated gap voltages are generated by electrically isolated alternators mounted on a common rotor shaft driven by an electric motor. Alternating power outputs from the alternators provide inputs to individual regulated d. c. power supplies to generate the gap voltages. The power supplies are electrically isolated and have outputs connected in series across successive pairs of accelerator electrodes. The described embodiment enables an ion beam to be accelerated to high energies and high beam currents, with good accelerator stability.

Abstract: A vehicle motor drive system having a first motor and a second motor connected by a common rotatable shaft, wherein the shaft is in operable engagement with a first and second wheel. The first motor is coupled to the first end of the rotatable shaft member and the second motor is coupled to the second end of the rotatable shaft member. The first motor and the second motor are mounted ninety electrical degrees out of phase from one another to minimize lorque ripple.

Abstract: Embodiments of the present invention include a composite electromechanical machine which can operate as a motor or a generator (including dynamo or alternator). In an aspect, the present composite electromechanical machine comprises at least double-sided magnetic planes (e.g., rotor or stator) disposed on both sides of a central frames. Other embodiments can also be included.

Abstract: In order to connect an angle measuring device to a brushless direct-current motor, a coupling is used, the coupling halves (10, 28) of which are each attached to the rotor (46) of the motor and/or the rotor (42) of the angle measuring device. Instead of using a coupling that is rotationally symmetrical at arbitrary angular positions as in the prior art, a coupling is used in which the coupling halves (10, 28) can be connected to one another only in a finite number of relative angular positions. An adjustment must be made before the coupling halves (10, 28) are attached to the respective rotors (46, 52). This allows all subsequent adjustment to be omitted, for example, even for maintenance work.

Abstract: Embodiments of the present invention include a composite electromechanical machine which can operate as a motor, a generator (including dynamo or alternator), or any combination thereof. In an aspect, the present composite electromechanical machine comprises at least a double-sided magnetic plane (e.g., rotor or stator) to form two rotor/stator pairs, together with a controller to configure the multiple rotor/stator pair. The controller can configure or convert the multiple rotor/stator pairs into motors, generators, or nonoperation, and also can change the windings characteristics of the magnetic planes. The controller can add new functionality and characteristics to the present composite electromechanical machine. Other embodiments can also be included.

Abstract: An accessory drive system which is capable of preventing the driving efficiency thereof from being lowered and achieving simplified construction, and reduction of the size and manufacturing costs. The system has a rotating machine including a first rotor, a second rotor, and a stator. The first rotor is formed by magnetic poles circumferentially arranged, with each two adjacent ones having different polarities. The stator has an armature row for generating a rotating magnetic pole that circumferentially rotates, between the armature and magnetic pole rows. The second rotor is formed by soft magnetic material elements circumferentially arranged with space, and disposed between the magnetic pole and armature rows. A ratio between the number of the armature magnetic poles, that of the magnetic poles, and that of the soft magnetic material elements is set to 1:m:(1+m)/2(m?1.0).

Abstract: An electric motor 1 includes a first structure 4 including a magnetic pole row formed by a predetermined plurality of magnetic poles 4a arranged in a predetermined direction, a second structure 3 including an armature row disposed in a manner opposed to the magnetic pole row, for generating moving magnetic fields moving in the predetermined direction between the armature row and the magnetic pole row, and a third structure 5 including a soft magnetic material element row. The third structure disposed such that the soft magnetic material element row is positioned between the magnetic pole row and the armature row. A ratio between the number of the armature magnetic poles, the number of the magnetic poles 4a, and the number of the soft magnetic material elements 5a is set to 1:m:(1+m)/2 (m?1.0).

Abstract: A cylindrical drive shaft has forward and rearward ends. A fixed cylindrical housing receives the drive shaft, the housing having forward and rearward ends. An axial flux permanent magnet motor encompasses the drive shaft within the housing. The axial flux permanent magnet motor has a radially exterior cylinder fixedly secured to the housing and a radially interior cylinder secured to the drive shaft for rotation therewith. Each axial flux permanent magnet motor has windings coupled to the exterior cylinder. Each axial flux permanent magnet motor has a permanent magnet fixedly coupled to the interior cylinder. Electrical lines have lower ends coupled to the windings and upper ends adapted to be coupled to a source of potential for energizing the axial flux permanent magnet motors.

Abstract: A drive arrangement with a first motor and a second motor is described, the first and second motor being coupled via a first coupling unit. The first motor is provided to generate uniform low-frequency movements and the second motor performs a higher frequency alternating movement to be overlapped. The total movement is transmitted from the second motor to a machine component coupled via a second coupling unit. The first coupling unit is configured to transfer the uniform low-frequency movement of the first motor to the second motor, wherein a transmission of the higher frequency alternating movement of the second motor to the first motor is suppressed.

Abstract: The present invention generally relates to electric motor systems which minimize irradiation of harmful electromagnetic waves by various means. More particularly, the present invention relates to an electric motor system with one or more counter units which minimize the irradiation of such harmful waves by suppressing the harmful waves to their sources and/or by emitting counter electromagnetic waves capable of canceling a desired portion of the harmful waves. Such counter units may then be incorporated into various locations for opposing magnetic poles of basic rotor units and/or basic stator units of the system. The present invention also relates to various methods of minimizing irradiation of such harmful waves by various electric motor systems, various methods of suppressing the harmful waves toward their sources, and various methods of canceling such harmful waves by the counter waves.

Abstract: It comprises stator including stator core having yoke and a plurality of teeth protruded from yoke, which is formed with slots between adjacent teeth, and rotor having rotor core and permanent magnet formed with a plurality of magnetic poles, which confronts tip ends of teeth via gaps, wherein rotor core is formed by rotor core materials circumferentially equally divided into the predetermined number of divisions, and the least common multiple being N for the number of slots and the number of magnetic poles and the least common multiple being M for the number of slots and the number of divisions, then N is equal to M.

Abstract: A power generation and conversion platform where power can be readily generated and converted from one form to another is disclosed. The system includes a central column having a plurality of components. These components include an electric motor, a power source for driving the motor, a flywheel coupled to the motor, a torque converter coupled to the flywheel, an electric generator that is driven by the flywheel and a number of electrical capacitors which are cyclically charged by the electric generator and discharged in the manner of a Marx generator.

Abstract: A polyphasic multi-coil generator includes a driveshaft, at least first and second rotors rigidly mounted on the driveshaft so as to simultaneously synchronously rotate with rotation of the driveshaft, and at least one stator sandwiched between the first and second rotors. The stator has an aperture through which the driveshaft is rotatably journalled. A stator array on the stator has an equally circumferentially spaced-apart array of electrically conductive coils mounted to the stator in a first angular orientation about the driveshaft. The rotors and the stator lie in substantially parallel planes. The first and second rotors have, respectively, first and second rotor arrays.

Abstract: An electrical roller drive which can be connected to a roller includes a disk-type motor with a secondary part in the form of a disk and with a primary part in the form of a disk.

Abstract: The present invention relates to cylindrical rotating electric machines which comprise armature and field source, with either the field source or the dual armature being the rotating component. The dual armature is composed of two concentric cylindrical sets of coils with the field source situated in the gap between the inner and outer armature sections. Relative rotational motion between the field source and armature coils can be achieved by having either one be the rotor. By using two armature coil sections, one inside the field source aperture and the other external to the field source, the flux linkage between the armature and field source can be approximately doubled. The increased flux linkage in the invented technology produces a substantially higher power density than can be obtained with conventional machine technology.

Abstract: In a hybrid vehicle, a motor includes a first rotor having permanent magnets, and a second rotor having a cores. The first rotor is connected to front wheels, and the second rotor to an engine. When the magnetic poles of rotating magnetic fields of armatures and of the permanent magnets are in respective positions opposed to each other, if either of the magnetic poles of the rotating magnetic fields and either of the magnetic poles of the permanent magnets have polarities different from each other, the others of the magnetic poles of the rotating magnetic fields and of the magnetic poles of the permanent magnets have the same polarities. If either of the cores are between the magnetic poles of the rotating magnetic fields and of the permanent magnets, the others are positioned between adjacent two pairs of the magnetic poles of the rotating magnetic fields and the permanent magnets.

Abstract: A method of unloading liquid from a reservoir includes deploying a pumping system into a wellbore to a location proximate the reservoir using a cable. The pumping system includes a multi-section motor, an isolation device, and a pump. The method further includes supplying a power signal from the surface to the motor via the cable and sequentially operating each section of the motor to mimic a multi-phase motor, thereby driving the pump and lowering a liquid level in the tubular string to a level proximate the reservoir.

Abstract: A gas turbine engine assembly includes an electromagnetic machine for extracting power from the turbine engine. The electromagnetic machine includes an outer rotor and an inner rotor rotatably supported adjacent to a stator disposed between the inner and outer rotors. The stator has an inner set of windings disposed on an inner surface adjacent to the inner rotor, and an outer set of windings on an outer surface of the stator adjacent to the outer rotor. The inner stator windings form a set of multiple-phase windings, and the outer stator windings form a set of multiple-phase windings.

Abstract: A plastics injection-molding machine is to be equipped with a more compact drive that undergoes less wear. For this purpose, it is envisaged to integrate the direct rotational drive into the direct linear drive. Accordingly, the electric linear motor has a pot-shaped external rotor (13), in the inner space of which the main part of a hollow-cylindrical stator (16) of the linear motor is arranged and which is firmly connected to the output shaft (10). The rotary drive has a stator (18), which is mounted on the inner wall of the hollow-cylindrical stator (16) of the linear motor, and a rotor, which is firmly coupled to the output shaft (10) within the stator (18) of the rotary electric motor. This direct drive produces a very compact type of construction and it is possible to dispense with easily wearing threaded spindles.

Abstract: An apparatus for converting between mechanical and electrical energy, particularly suited for use as a compact high power alternator for automotive use and “remove and replace” retrofitting of existing vehicles. Various aspects of the invention provide a means of significantly increasing the output of permanent magnet alternators while addressing the issues of radial loading applied to a permanent magnet alternator rotor. Another aspect of the invention allows for the production of power in two discrete voltages. An aspect of this invention allows for a marked increase in output capability without increasing axial length through the use of magnetic fringing. One aspect of the invention offers an effective means of mounting a skewed stack that eliminates or reduces cogging that is present in a permanent magnet machine without negatively impacting airflow. Another aspect of the invention reduces cogging by radially offsetting opposing magnets of a dual rotor permanent magnet machine.

Abstract: A starter/generator mechanically coupled to a gas turbine transmission housing is disclosed. The starter/generator includes a generator with a rotor forming a field winding and a stator forming an armature, and an energizer with a stator forming a field winding and a rotor forming an armature connected to the generator field winding. The generator rotor and the energizer rotor are mounted on a common shaft with a transmission housing gear wheel, on either side of the gear wheel.

Abstract: A reluctance machine includes a stator and a rotor. The stator and rotor have a same number of poles. The rotor is configured to rotate about an axis of rotation. Each stator pole is formed of a primary stator pole and an auxiliary stator pole. The auxiliary stator pole is axially aligned with the primary stator pole in the direction of the axis of rotation. Each rotor pole has a length extending in the direction of the axis of rotation sufficient to at least partially cover the primary stator pole and axially aligned auxiliary stator pole. The primary stator poles are actuated with an alternating magnetic field orientation, and the auxiliary stator poles are also actuated with an alternating magnetic field orientation. The field orientations for the primary and auxiliary stator poles are, however, opposite each other such that a primary stator pole its axially aligned auxiliary stator pole have opposite magnetic field orientations.

Abstract: Systems and methods are provided for an inverter system for use in a vehicle having a first energy source and a second energy source. The system comprises a motor having a first set of windings and a second set of windings. The first set of windings is electrically isolated from the second set of windings. The system further comprises a first inverter coupled to the first energy source and adapted to drive the motor, wherein the first set of windings are coupled to the first inverter. The system also comprises a second inverter coupled to the second energy source and adapted to drive the motor, wherein the second set of windings are coupled to the second inverter. A controller is coupled to the first inverter and the second inverter.

Abstract: The electric rotating machine includes a fixed stator fixed to the inner circumferential side of a housing, a moving stator rotatably supported on the inner circumferential side of the housing, a rotor disposed concentrically on the inner circumferential side of the fixed stator and the moving stator, and a moving stator drive formed of a gear and a motor for rotating the moving stator by a predetermined angle. The moving stator drive is detachable with respect to the housing. Coil leader lines are stored in an internal part of the housing so that the moving stator is capable of rotating by a predetermined angle.

Abstract: A generator that comprises at least one ferromagnetic core including a gap, a magnet capable of producing a normal magnetic field within said gap and at least one coil positioned within the normal magnetic field on the core. At least one diamagnet that is positioned to pass through said gap on said core, wherein the diamagnet momentarily blocks the normal magnetic field causing a voltage to be induced within said coil.

Abstract: The invention relates to a transmission for a motor vehicle with a transmission housing, with an electrical actuator for the actuation of the transmission and with an electrical control device for the control of the actuator. The transmission has a heat sink device 24 thermoconductively connected to the device and a heat insulating layer between a housing of the actuator and the heat sink device for the thermal insulation of the actuator housing and of the heat sink device, with the actuator housing being thermoconductively connected to the transmission housing or being part of the transmission housing. The invention furthermore relates to a corresponding actuator unit for a transmission.

Abstract: A universal three dimensional motor generator system is provided with magnets and permanent magnetic and/or electromagnetic windings on rotors and stator for compounding and multiplying the order of voltage or potential to or from a machine. Three rotating rotors mechanically interconnected through gears and coils are strategically positioned within a housing that allows the multiple input and/or output of single and/or three phases A/C, D/C or in combination. When input power is supplied to rotor one, rotor two and rotor three start rotating along with rotor one due to gear arrangement to generate/produce power which is fed back to rotor one. This generated/produced power can/will be utilize to supplement the input power to maintain the synchronous speed across the designed load or combined to increase the output rating of machine.

Abstract: A three-phase line synchronous generator with an exciter and generator stage. The exciter stage includes an exciter stator having n poles and an exciter rotor having n poles and disposed for rotation within the exciter stator, and the generator stage includes a generator stator having n poles and a generator rotor having n poles. The generator rotor being mechanically coupled to the exciter rotor and disposed for rotation within the generator stator, wherein the poles of the stators, or the poles of the rotors, are angularly displace by one pole pitch.

Abstract: A motor assembly with coaxial shafts is provided which can be produced at low costs and in which a plurality of motors can be disposed with their respective rotary shafts arranged coaxially to one another with high coupling and assembling accuracy in a simple structure. Each motor includes a housing member and ball bearings to rotatably support the rotary shaft and two adjacent motors are fixedly coupled together such that the respective housing members of the adjacent motors are fitted with each other.

Abstract: The present invention relates to cylindrical rotating electric machines which comprise armature and field coils, with either the field coil or the dual armature being the rotating component. The dual armature is composed of two concentric cylindrical sets of coils with the field coil situated in the gap between the inner and outer armature sections. Relative rotational motion between the field and armature coils can be achieved by having either one be the rotor. By using two armature coil sections, one inside the field coil aperture and the other external to the field coil, the flux linkage between the armature and superconducting field coil can be approximately doubled. This is a more efficient use of the superconductor. The increased flux linkage in the invented technology produces a substantially higher power density than can be obtained with current conventional superconducting machine technology.

Abstract: The electric motor device is provided. The electric motor device includes: a first drive member that has a plurality of permanent magnets; a second drive member that has a plurality of electromagnetic coils; and a clearance controller that shifts at least either one of the first drive member and the second drive member, thereby changing a size of a clearance formed between the first drive member and the second drive member.