Abstract: In an axial-air-gap induction motor which has a disk-shaped stator and rotor placed coaxially around a rotating shaft with their surfaces opposing each other across a predetermined gap, the stator and rotor are each composed of a disk-shaped yoke and teeth fitted and secured in the yoke, making it easy to fasten the stator to the bracket, and the rotor to the rotating shaft, as well as to mount windings in the stator core and rotor core.

Abstract: An electromotive machine having a stator element and a rotor element, the stator element including at least one set of N preferably toroidally shaped electromagnetic members, the electromagnetic members arranged along an arc a predetermined distance apart defining a stator arc length. Each of the members has a slot, and the rotor element includes a disc adapted to pass through the slots. The disc contains a plurality of permanent magnet members spaced side by side about a periphery thereof and arranged so as to have alternating north-south polarities. These permanent magnet members are sized and spaced such that within the stator arc length the ratio of stator members to permanent magnet members is N to N+1, where N is the number of electrical excitation phases applied to the electromagnets. The electromagnetic members are energized to create high torque and smooth operation.

Abstract: A bicycle driven by a brushless motor. The vehicle has at least one wheel with a plurality of ferromagnetic steel elements annularly disposed on the rim. Three C-shaped electromagnets are connected to the body of the vehicle to alternatively attract the steel elements, maintaining wheel rotation.

Abstract: An electrical machine comprises a magnetically permeable ring-shaped core centered on an axis of rotation and having two axially-opposite sides. Coils are wound toroidally about the core and disposed sequentially along the circumferential direction. Each coil includes two side legs extending radially alongside respectively sides of the core. Coil-free spaces exist between adjacent side legs. A bracket has first and second side flanges that are connected by a bridging structure and respectively abut the first and second sides of the coil.

Abstract: The present invention relates generally to a magnet motor, and having being provided the driven power of the electromagnet motor for electric vehicles, wherein, it has provided with a wireless coil whole rotator, which the upper part has been constructed with an equal angle, a power perpetual magnet is provided. At least one set of a magnet pole coil is formed into an electromagnet pole module and a circuit control unit. Using the perpetual magnet and the less electricity consumption of an electric magnet pole generates the repelling torque, accomplishing the object of the turning rotator to generate power. Either it is coupled with a simple or a complex structure; it can apply to be the driven motor of a bicycle, a motorcycle and a car. Moreover, it can greatly reduce the consumption of the vehicle battery electricity, and make it to be an environmental protection and practical vehicle means.

Abstract: A unitary amorphous metal magnetic component for an axial flux electric machine such as a motor or generator is formed from a spirally wound annular cylinder of ferromagnetic amorphous metal strips. The cylinder is adhesively bonded and provided with a plurality of slots formed in one of the annular faces of the cylinder and extending from the inner diameter to the outer diameter of the cylinder. The component is preferably employed in constructing a high efficiency, axial flux electric motor. When operated at an excitation frequency “f” to a peak induction level Bmax the unitary amorphous metal magnetic component has a core-loss less than “L” wherein L is given by the formula L=0.0074 f (Bmax)1.3+0.000282 f1.5 (Bmax)2.4, the core loss, excitation frequency and peak induction level being measured in watts per kilogram, hertz, and teslas, respectively.

Abstract: An electrical machine has a core that includes stranded magnetically permeable material. The core is elongated to thereby define a lengthwise direction and a profile that is transverse to the lengthwise direction. Coils are wound about the core profile and sequentially disposed along the lengthwise direction. A magnet is adjacent to the core and movable relative to the core.

Abstract: An electrical machine includes first and second magnetically permeable parallel cores. Each core is elongated to thereby define a lengthwise direction and first and second core profiles transverse to the lengthwise direction. First coils are wound about the first core profile and sequentially disposed along the length of the first core. Second coils are wound about the second core profile and sequentially disposed along the length of the second core. A multi-pole elongated permanent magnet is parallel with the cores and located between them. The magnet is movable, relative to the cores, in the lengthwise direction.

Abstract: There is provided a rotating apparatus with high efficiency by means of magnetic force, which comprises a stator ST in which a plurality of electromagnets 2 composed by winding a coil 1 around a core 10 formed of a strong magnetic material are uniformly arranged at the same intervals, the stator ST having a driving shaft hole 9 at the center in which a driving shaft 6 is freely rotatable and the stator ST being provided such that the driving shaft 6 is inserted in the driving shaft hole 9, and rotors RO in which the same numbers of permanent amagnets 3 as that of the electromagnets 2 of the stator ST are arranged at the same intervals as that of the electromagnets 2 of the stator ST on both right and left end surfaces of the stator ST, the rotors RO being fixed to the driving shaft 6 with a small gap 12 with the electromagnet surface of the stator ST.

Abstract: An electromagnetic circuit that may be advantageously employed in an articulated camera, such as a CCTV camera, as a part of a servo mechanism to directly drive the camera and optical lens assembly, for example, in the pan and/or tilt axes. In one embodiment, the coil assembly of the servo mechanism may comprise four separate coils that rotate about the center of the ring shape of a single one-piece ring-shaped permanent magnet that has been pre-magnetized in two pair of opposing polarities. The magnet assembly that includes the magnet ring, may be bonded to a circular plate made of ferrous metal.

Abstract: A driving apparatus includes a rotor rotatable about a rotational axis and having a cylindrical magnet portion whose outer circumferential surface are divided along a circumferential direction into a plurality of differently magnetized portions, at least an outer magnetic pole portion formed extending in a direction parallel to the rotational axis of the rotor, and facing the outer circumferential surface of the magnet portion, an inner magnetic pole portion formed opposingly to the outer magnetic pole portion, and facing an inner circumferential surface of the magnet portion, and a coil for magnetically exciting the outer and inner magnetic pole portions. The coil is arranged along a direction of the rotational axis of the rotor. The rotor can be selectively held at one of three stop positions, and a condition of −0.3X+0.

Abstract: The invention concerns a machine forming a motor or generator including a stator and a rotor. The rotor is a passive rotor, consisting of two ferromagnetic discs whereof at least one is toothed. The stator includes a fixed polyphase field coil arranged in an air gap defined by the space provided between the two discs and generating a rotating magnetic field, and a field coil likewise fixed. The invention is applicable to a cylindrical rotary machine or to a machine with linear displacement.

Abstract: A flat rotary electric generator includes at least one toroidal coil structure for cutting magnetic lines to induce a current and at least one disc-shaped magnetic pole structure oriented parallel to the helical coil structure. If multiple toroidal coil structures and disc-shaped magnetic coil structures are included, the toroidal coil structures and disc-shaped magnetic coil structures are arranged in alternating manner. The toroidal coil structure and disc-shaped magnetic pole structure are not provided with a permeable material. When either the toroidal coil structures or the at least one disc-shaped magnetic pole structure is rotated by an external force, the toroidal coil structure cuts the magnetic lines passing therethrough to generate an induced current.

Abstract: The invention relates to a flywheel magneto generator having a rotor assembly and a stator assembly. The rotor assembly includes a non-ferromagnetic flywheel and a plurality of magnetic poles that are positioned in spaced relationship around the circumference of the flywheel. The stator assembly includes an E-shaped core with a single magnet mounted on the center leg and coils associated with at least the outer legs. The poles and core may be formed of a bonded iron material. The poles may be joined to the flywheel by press fitting or integral molding, among other methods.

Abstract: In axial magnetic bearing apparatus in which a rotary disc made of a magnetic material is fixedly attached to a rotating shaft, and electromagnets are disposed on opposite sides of the rotary disc so as to have suitable very small distances therefrom respectively, so as to bear the rotating shaft axially in a non-contact state, a deep groove for forming an air layer having large magneto-resistance is provided all over the outer circumference of the rotary disc. Thus, formation of a magnetic circuit not contributing to position control is relieved, and the weight of the disc is reduced so that the position control performance of the axial magnetic bearing and the natural frequency of a rotor are improved.

Abstract: A method of increasing the power output of existing permanent magnet motors along with apparatus is disclosed. Increased power output is achieved by more completely utilizing the magnetic field of motor permanent magnets during running. The apparatus is external to the motor and therefore eliminates the need for modifications to the motor itself. The method involves providing a source of power to a permanent magnet motor which is capable of demagnetizing the motor permanent magnets at stall, and reducing the power at start up to a level sufficient to prevent demagnetization. Full power to the motor is provided when the motor speed reaches a level sufficient to prevent demagnetization of the permanent magnets.

Abstract: A cylindrical stator is installed in a case. First and second discal rotors are installed in the case and arranged at axially opposed end portions of the cylindrical stator to rotate about an axis of the cylindrical stator. A case bracket is installed in the case to support the cylindrical stator. The case bracket is in abutment with an inner surface of the case to be held in the case. With this arrangement, the cylindrical stator is assuredly held and supported in the case.

Abstract: Winding assemblies of electrical machines, such as electric motors, are provided which include a connector scheme having at least one conduit that is electrically coupled via a wave soldered connection directly to at least two windings which are not axially adjacent. The conduit can include a common connector and/or a phase connector. The connector scheme can additionally or alternatively include a power connector that is electrically coupled via wave soldering directly to a single winding, and adapted to be electrically coupled to a power source. The winding assemblies of the invention can additionally provide a number of constructions which allow for minimally sized air gaps.

Abstract: A toroidal AC generator includes an outer casing (11) and an annular stator core (33) of ferromagnetic material which is encased in a hollow annular cover (34) of plastics material and which is fixed to the casing (11) between the discs (14 and 15) of a twin disc rotor (10). Each rotor disc (14, 15) carries a circular array of alternately polarised permanent magnets (23 and 24) which face the stator core (33). The hollow annular cover (34) is a two-part moulding and is formed of radially inner and outer ring portions which are joined by circular arrays of radial ribs which extend across the opposed radial faces of the annular core (33) and form open-ended radial passages for the electrical phase windings which are wound around the cover (34). The ribs project radially beyond the radially outer ring portion and form hooks around which a winding may be retained temporarily during winding.

Abstract: A multiple phase winding for an electromotive device comprised of individual phase windings. Each phase winding includes multiple layers of conductors and defines working length portions and interior and exterior end-turn portions, wherein at least one set of end-turn portions defines notches which cut across the height dimension of all the layers of conductors. The notches of different phases intermesh. This geometry promotes low electrical resistance within the phase windings and good conductive heat transfer between the multiple phase winding and the housing of the electromotive device, allowing higher power density from the device.

Abstract: The present disclosure provides an assembly including an electric motor within an electric motor case and a driveline support. The electric motor includes at least one stator and a rotor. The rotor is connected to a rotor shaft. The vehicle support includes a hub rotatably attached to a housing by a package bearing. The electric motor case is attached to the housing and supports the stator. The rotor shaft is attached to the hub and supported solely by the package bearing of the driveline support. A shoulder portion of the rotor shaft abuts an end of the hub such that a desired air gap is maintained between the rotor and the stator.

Abstract: An eccentric rotor having a high density member includes a rotor base having an air-core armature coil installation surface, a bearing holder provided at a center thereof, and an air-core armature coil position determination guide formed of a high density member including metal, having a specific gravity of 6 or more and arranged to be eccentric outside of the bearing holder, an air-core armature coil arranged at the air-core armature coil position determination guide, a printed wired commutator member installed to insulate a conductive portion having electric potential from the high density member, and an end connection pattern, in which ends of the air-core armature coil are connected, installed at the printed wired commutator member inside an outer circumference of rotation at a position not overlapping the air-core armature coil.

Abstract: A flat rotary electric generator includes at least one toroidal coil structure for cutting magnetic lines to induce a current and at least one disc-shaped magnetic pole structure oriented parallel to the helical coil structure. If multiple toroidal coil structures and disc-shaped magnetic coil structures are included, the toroidal coil structures and disc-shaped magnetic coil structures are arranged in alternating manner. The toroidal coil structure and disc-shaped magnetic pole structure are not provided with a permeable material. When either the toroidal coil structures or the at least one disc-shaped magnetic pole structure is rotated by an external force, the toroidal coil structure cuts the magnetic lines passing therethrough to generate an induced current.

Abstract: An axial field electric machine having an improved efficiency includes a number of magnetic elements (e.g., as a rotor) as annular disks magnetized to provide multiple sector-shaped poles. Each sector has a polarity opposite that of an adjacent sector, and each sector is polarized through the thickness of the disk. The poles of each disk are aligned with opposite poles of each adjacent magnet. Metal members adjacent the outermost disks contain the flux. The axial field electric machine also includes one or more conductor elements (e.g., as a stator) which include a number of conductor phases that traverse the flux emanating between poles of axially adjacent magnetic elements.

Abstract: A stepping motor includes a first motor unit having a first stator unit and a first rotor unit and a second motor unit having a second stator unit and a second rotor unit. The first stator unit has air-core coils that are radially arranged on a first isolating magnetic disc. The first rotor unit has permanent magnets that are alternatively magnetized in N-pole and S-pole and radially arranged on a second magnetic disc with a predetermined air gap to the first stator unit. Similarly, the second stator unit has air-core coils on a third isolating magnetic disc and the second rotor unit has permanent magnets on a fourth magnetic disc. The first and second stator units are fixed to the different sides of a non-magnetic disc. The first and second rotor units are fixed to a rotation axis and face each other across the first and second stator units.

Abstract: The continuously variable electromagnetic transmission comprises a commutator-less, axial flux dynamoelectric machine (3) provided with an input shaft (2) and an output shaft (4), and means (20) for controlling and supplying electric power at a variable frequency to said machine. The dynamoelectric machine comprises a stator (16), a first rotor (12) which is connected to the input shaft, and a second rotor (15) which is connected to the output shaft and arranged in such a way that it can interact with the first rotor and the stator, whereby the two rotors and the stator are formed by discoid elements. The transmission comprises means for axially displacing at least one of the discoid elements in order to modify the width of the axial air gap between said element and an adjacent discoid element, whereby the magnetic field can be regulated by variations in said gap and the two rotors can be mechanically coupled to each other.

Abstract: A cascaded motor arrangement is configured with a plurality of rotor/stator sets that extend in an axial direction. A stator set contains a plurality of separate electromagnet core segments disposed coaxially about an axis of rotation. The core segments may be affixed, without ferromagnetic contact with each other, to a non-ferromagnetic support structure. A rotor set is configured in a U-shaped annular ring that at least partially surrounds the annular stator set and may define two parallel axial air gaps between the rotor and stator respectively on opposite axial sides of the stator and at least one radial air gap. Permanent magnets are distributed on each inner surface of the U-shaped rotor annular ring that faces an air gap. A winding is formed on a core portion that links axially aligned stator poles to produce, when energized, magnetic poles of opposite polarity at the pole faces.

Abstract: An electric machine with a rotor and a stator, in which electric coils and permanent magnets are disposed. These coils and magnets influence each other when the rotor revolves. The magnets are cylindrical and are disposed tangentially on a circumference of the rotor. The coils do not have an iron core and at least one section of the coils extends transversely across the circumference of the rotor. The coils are fitted in the stator individually and are bent so that they extend on both axial sides of the rotor and surround the magnets located in the rotor.

Abstract: An axial flux induction motor containing both laminates and soft magnetic composite materials is described. By combining these two materials, the axial flux induction motor obtains a limited volumetric space, including a limited height, and smooth torque output, including a limited ripple. The axial flux induction motor also contains rotors bars that are skewed. These skewed bars smooth the torque pulsations of the induction motor, enhancing an efficient operation of the motor.

Abstract: A brushless electrical machine for converting between electrical and mechanical energy includes a rotor supported on bearings for rotation about an axis of rotation, and a stator that is stationary and magnetically acts upon the rotor. The rotor includes two ferromagnetic rotor portions separated by a magnetic insulator, forming an axial armature air gap between the ferromagnetic rotor portions. At least one of the two ferromagnetic rotor portions has multiple axial extending protrusions facing the axial armature air gap around a circumference. An air core armature having multiple phase windings is located in the axial armature air gap. A ferromagnetic yoke and homopolar flux generator are mounted to the stator. The homopolar flux generator generates homopolar flux in the protrusions of the rotor and the ferromagnetic yoke forms two rotor-to-stator air gaps with the rotor.

Abstract: A magnet type stepping motor which has (1) a stator with three-phase stator windings, and 6m pieces of stator main pole arranged side by side, where m is an integer and ≧1, the stator windings of one phase are wound around every two stator main poles among the 6m pieces of the stator main pole, wherein when the stator windings of one phase are excited with a direct current, m pieces of N pole and M pieces of S pole are formed alternately on the 6m pieces of stator main pole, and (2) a rotor of a cylindrical permanent magnet magnetized in the circumferential direction to form Z/2 pieces of N pole and Z/2 pieces of S pole alternately, where Z is the number of rotor poles.

Abstract: A rotor disc (14), for use in an electrical machine (10), has at least one circumferential rotor rim (16) mounted thereon. The rotor rim (16) comprises at least one row of alternate magnets (20) and laminated pole pieces (18). The laminations in each pole piece (18) are mounted concentrically on a bolt (22) that extends through the rotor disc (14). A clearance (23) is provided between the laminations in each pole piece (18) and the bolt (22). The clearance (23) insulates the bolt (22) from the laminated pole pieces (18), which are made from a ferromagnetic material such as silicon-iron alloy, to minimize power losses due to eddy currents.

Abstract: A rotor for an electric rotary machine having signal generating inductor magnetic poles provided on a periphery thereof comprising a cup-like rotor yoke having a peripheral wall and a bottom wall and an inductor forming member mounted on the peripheral wall of the cup-like yoke and including a ring-like portion fitted onto the peripheral wall of the rotor yoke and having the inductor magnetic poles formed thereon and securely mounted on the rotor yoke by forcing protrusions formed on the peripheral wall of the rotor yoke against the both axial ends of the ring-like portion.

Abstract: An axial-gap motor comprising a base, a shaft, a stator frame, a plurality of electromagnet units, bearings, a rotor frame, and a plurality of permanent magnet units, an rotary encoder, and a drive unit. The rotor frame is spaced from the stator frame by a predetermined distance. The permanent magnet units oppose the electromagnet units across a predetermined axial gap. From the output of the rotary encoder, the drive unit supplies an excitation current to the electromagnet units, causing the magnetic poles of the units to repulse those of the permanent magnet units. The magnetic-field centerline that passes the center of each electromagnet unit intersects, at a predetermined angle, with the magnetic-field centerline that passes the center of one permanent magnet unit.

Abstract: A generator comprising a generator main section having a stator provided with a winding and a rotor provided with a winding and opposed to the stator with an air gap therebetween, the rotor being rotatably supported by a rotating shaft, and an excitor having a stator provided with a winding and a rotor provided with a winding and opposed to the stator with an air gap therebetween, the rotor being rotatably supported by the rotating shaft of the generator main section, and wherein the winding provided on the rotor of the generator main section and the winding provided on the rotor of the excitor are electrically connected to each other through electronic parts, and the stator and the rotor of the excitor are opposed to each other with an air gap therebetween in a direction along the rotating shaft.

Abstract: A generator designed to use any required number of disk shape armature winding and disk shape magnetic polefaces, wherein armature and polefaces are fabricated by creating an opening in the center of each said componant. A armature shaft intersect each poleface and rotate therethrough without contacting said poleface, armature winding associated with the polefaces is attach to said armature shaft with each armature situated between two magnetic poleface, said polefaces are secured by sleevemeans attach to each poleface. Armature shaft with commutator fitted at the output end is rotatable supported at each end by endframes and extend beyond the second endframe; elongated support strut fixedly attach each endframe to each end of said support strut.

Abstract: A switched reluctance motor has a stator with a first set of poles directed toward levitating a rotor horizontally within the stator. A disc shaped portion of a hybrid rotor is affected by the change in flux relative to the current provided at these levitation poles. A processor senses the position of the rotor and changes the flux to move the rotor toward center of the stator. A second set of poles of the stator are utilized to impart torque upon a second portion of the rotor. These second set of poles are driven in a traditional switched reluctance manner by the processor.

Abstract: An electric rotating machine including a casing, two disk-shaped rotors arranged in concentric relation to each other within the casing, and a stator disposed concentrically with the rotors within the casing. The rotors include magnets, respectively. The magnet of one of the rotors and the magnet of the other of the rotors are disposed radially offset from each other. The stator includes a radially outer portion axially opposed to the magnet of one of the rotors and a radially inner portion axially opposed to the magnet of the other of the rotors.

Abstract: An improved flat or cylindrical mechanical electric commutator with neutral segments (4) between the current carrying segments which allow the current carrying carbon brushes (11, 12, 13, 14) in a brush holder (7) to pass from a negative current carrying segment to a positive current carrying segment or the opposite charge current in the base of the commutator without allowing the face or any part of the carbon brush to touch both the negative and positive segments in the base of the commutator at the same time, resulting in the switching of the electric current to an energized coil of an electric motor, electrical generator or electric apparatus or device, at predetermined intervals and times to suit the design requirements of the energized coil, electric motor of the stepper, brushless DC and switched design, electric generator or electric apparatus or device, while the commutator can accommodate single phase electrical circuits, double phase electrical circuits, three phase electrical circuits or any numbe

Abstract: A dual stator axial gap DC brushless machine is provided with first and second stators having equal pole counts, a given pole arc, and a given slot arc. A rotor is disposed between the first and second stators, having a pole count greater than the first and second stators. The pole count ratio between each stator and the rotor is six to eight. The second stator has a given degree of angular displacement relative to the first stator less than, ¾, ½ or ¼ the pole arc of the stators, but not less than the slot arc of the stators. Where the first and second stators each have a pole count of 18 and the rotor has a pole count of 24, the stator pole arc is 20 degrees, the rotor pole arc is 15 degrees, and the given degree of angular displacement is less than 20 degrees, 15 degrees, 10 degrees, or 5 degrees.

Abstract: Electric machine (10) which can be operated as a motor or generator, with a rotor (26a, 26b) rotatably mounted in a housing (12), a rotor shaft (24) which extends beyond the housing (12) and a plurality of electromagnet components (28) which are statically disposed in the housing at uniform angular spacings and spaced from the axis of rotation of the rotor, each with a coil core (32) bearing a coil winding (30) consisting of one or more conductors. The pole faces of the end faces of the coil cores (32) are aligned with pole faces of permanent magnets (27) which are retained non-rotatably in or on the rotor and each have a polarity which is successively reversed in the peripheral direction.

Abstract: An armature according to the prior art, which is comprised of sheet metal laminations and in which only a beginning region and an end region of the lamination bundle comprised of the sheet metal laminations are fastened to a rotor shaft by means of a press fit, has the disadvantage that sheet metal laminations between the beginning region and the end region shift in the presence of very high torques.

Abstract: The present invention relates generally to a magnet motor, and having being provided the driven power of the electromagnet motor for electric vehicles, wherein, it has provided with a wireless coil whole rotator, which the upper part has been constructed with an equal angle, a power perpetual magnet is provided. At least one set of a magnet pole coil is formed into an electromagnet pole module and a circuit control unit. Using the perpetual magnet and the less electricity consumption of an electric magnet pole generates the repelling torque, accomplishing the object of the turning rotator to generate power. Either it is coupled with a simple or a complex structure; it can apply to be the driven motor of a bicycle, a motorcycle and a car. Moreover, it can greatly reduce the consumption of the vehicle battery electricity, and make it to be an environmental protection and practical vehicle means.

Abstract: The present invention relates to an A. C. electrical machine comprising: a plurality of disk-shaped annular stator elements stacked and spaced equidistantly from each other and mounted on a frame; a plurality of disk-shaped rotor elements mounted on a rotational axis and spaced equidistantly from each other such that successive rotor elements are positioned between successive stator elements; a plurality of electrical windings on each of the first stator elements, which when energized with a current flow, produce a magnetic field in a direction substantially parallel to the axis; and a return path for completing a magnetic flux path in a second direction perpendicular to the first direction on successive stator elements and through the rotor elements for generating a rotational force in the rotor elements.

Abstract: An electric motor utilizing permanent magnets, wherein the permanent magnets produce a flux circuit in a first direction and shunt elements whereby the magnets and shunt elements rotate relative to each other wherein the shunt elements sequentially interrupt the magnet flux circuit to minimize generated flux circuits tending to rotate the motor in a direction opposite to the primary direction of motor rotation.

Abstract: A motor for incorporation in an actuator pivot includes a coil disk, an upper magnet-yoke disk, and a lower magnet-yoke disk. The coil disk is attached to the pivot shaft to form a shaft-coil assembly. The coil disk includes a plurality of coils, each placed orthogonally to the axis of the shaft. Each coil is configured to receive an electrical current in a first direction. A second coil located diametrically opposite to the first coil is configured to receive a second electrical current in a second direction so that the coils generate a torque with a net resultant linear force being substantially equal to zero. The first magnet-yoke disk, for mounting relative to the shaft at a location above the coil disk so that the first magnet-yoke disk rotates with respect to the coil disk, the magnet-yoke ring comprising at least one magnet, aligned in a first direction, and a respective plurality of yokes, each yoke for holding at least one magnet such that magnetic lines of flux are generated parallel to the axis.

Abstract: An electric motor with rotor being a drive wheel. The drive wheel has one or more permanent magnets attached to said drive wheel with opposite magnetic poles adjacent to one another. One or more electromagnets are attached to the structure to which the drive wheel is rotatably connected. A sensor determines the location of the permanent magnets. This information is utilized to assure that the electromagnets are energized only when the resultant magnetic fields will interact with the magnetic fields of the permanent magnet to produce a force on the drive wheel that will cause rotation in the desired direction. Three principal embodiments are employed. In a first embodiment, a computer periodically activates a switch to send pulsed voltage to the electromagnets; the percentage of the period of each pulse during which the voltage is non-zero determines the speed of the drive wheel. In a second embodiment, the computer is replaced with a timing circuit that controls the switch.

Abstract: The invention relates to a disk motor with an armature disk, which is rotatably mounted and provided with permanent magnets, and with a stator which comprises a stator plate which is equipped with coils. The aim of the invention is to provide a disk motor that is as flat as possible and that is characterized by an improved smoothness of running. To this end, an annular soft-magnetic prestressing device is arranged concentrically on the stator plate in such a manner that at least one section of the prestressing device is located below the coil window of the coils in the axial direction. The armature disk may support an annular flux-return element opposite which the annular prestressing device is located in the radial direction. Said prestressing device has a cross-sectional contour that guides the magnetic lines of electric flux from the annular flux-return element to the coil window.

Abstract: Disclosed is a permanent magnet generator incorporated in a 3.5″ diskette that can be used as an input/output adapter for memory cards that can generate a power generation output of 40 mW or more when the rotor of the generator is rotated at 300 rpm. The permanent magnet generator has such a construction that rotor magnetic poles are provided only on one end face of a disc-shaped permanent magnet serving as a rotor, a plurality of stator magnetic poles are provided only on that end face of the permanent magnet in such a manner as to face the rotor magnetic poles, and a soft magnetic hub is fixedly fitted to the other end face of the permanent magnet. Even when a bonded NdFeB magnet is used as the permanent magnet, a sufficient power can be produced.

Abstract: An electric axial flow machine includes an ironless disk-shaped rotor arranged on a machine shaft and having permanent magnets embedded in a fiber- or fabric-reinforced plastic, and, on both sides, next to the rotor, a stator, wherein the permanent magnets are each joined to the surrounding fiber- or fabric-reinforced plastic so that the permanent magnets and the machine shaft form a dimensionally stable unit.