Abstract: An electrically operated throttle valve assembly 110, 210 having a throttle shaft 18, 218 with a portion extending exteriorly of the throttle body 12. Rotor 166, 266 is mounted on the extending portion of shaft 18, 218. A housing 80 concentrically surrounds the rotor 166, 266 and includes a rear wall 86, 286 to which stator 134, 234 is attached. The stator 134, 234 having a plurality of circumferentially spaced pole segments each with a coil is mounted to the rear wall 86, 286 and is concentrically disposed within the rotor 166, 266. The hollow cylindrical rotor 166, 266 with plural magnets 72, 74, 272, 274 disposed about the inner periphery has a radial web flange 168, 268 which is drivingly attached to one end of the extending portion of shaft 18, 218 with the rotor 166, 266 nested over the stator pole segments.

Abstract: A rotor magnet includes a first polarized layer alternately polarized into different poles while being circumferentially divided into n parts, and a second polarized layer alternately polarized into different poles. An advance phase angle as &thgr;1 with respect to the first polarized layer is set and the magnet is circumferentially divided into n parts. First and second coils are disposed in an axial direction of the rotor magnet. A first outer magnetic pole and a first inner magnetic pole, which are a first stator excited by the first coil, are opposed to an outer peripheral surface and an inner peripheral surface of the rotor, and a second outer magnetic pole, and a second inner magnetic pole which are a second stator excited by the second coil, are opposed to an outer peripheral surface and an inner peripheral surface of the rotor.

Abstract: In an electrical machine, in particular a three-phase generator, with a stator (10) fastened in a housing and with a claw pole rotor system, mounted on a shaft (2), with a first pole ring (4), configured as a magnet wheel half and tapering into claws (41), and a second pole ring (3), mechanically joined to the first pole ring (4) by a nonmagnetic joining means and tapering into claws (31), as a magnet wheel half, the respective tips of the claws (31,41) of the one pole ring (3,4) extending into the interstices between the claws (41,31) of the other pole ring (4,3), and with an exciter winding (25) associated with the pole rings (3,4) on the shaft side, in the interest of a strong, easily accessible welded join between the pole rings (3,4) the nonmagnetic joining means is a nonmagnetic plate (5) which adjoins the surface (42) of the first pole ring (4) facing away from the claws (41) of the first pole ring (4), and is joined to that surface and to the tips of the claws (31) of the second pole ring (3).

Abstract: Flywheel battery systems having improved energy density are provided. Such systems preferably have an inner rotor mounted coaxially and substantially cylindrically within an outer containment rotor. The outer rotor counter-rotate relative to said inner rotor so as to manage the net gyroscopic force generated by the flywheel system. The outer rotor has a greater relative inertia as compared to said inner rotor and therefore can be rotated at a relatively lower rotational velocity to balance the gyroscopic forces generated by the rotation of the inner rotor. The relative rotational velocities of the inner and outer rotor are maintained by a combined mechanical and magnetic drive/suspension system.

Abstract: Disclosed herein is a coreless AC Induction motor. The motor comprises a cup type coreless rotor. A rotating shaft is combined with the cup type coreless rotor. An induction rod is inserted into the cup type coreless rotor to guide a magnetic flux from the stator effectively. A stator is positioned around the coreless rotor. The cup type coreless rotor comprises a squirrel cage-shaped conduction cylinder and composite material or polymer resin. The squirrel cage-shaped conduction cylinder is made of material having high electric conductivity, such as aluminum or copper, and has plurality of slots along the axis of the squirrel cage-shaped conduction cylinder. The composite material or polymer resin fills the slots of the squirrel cage-shaped conduction cylinder to make up for the low stiffness of the squirrel cage-shaped conduction cylinder.

Abstract: A rotational power converter is composed of a stator fixed to a cylindrical housing and a first rotor and a second rotor rotatably supported in the housing. The first rotor is driven by an internal combustion engine, and electric power is supplied to the stator from a battery, forming a rotating magnetic field in the stator. Rotational power is electromagnetically transferred from the first rotor to the second rotor that is connected to driving wheels of a vehicle. The amount of the rotational power of the second rotor is adjusted by controlling electric current supplied to the stator. The battery either supplies power or receives power according to the amount of the rotational power of the second rotor. Since the electric current is supplied only to the stator fixed in the housing, no electric feeder having slip-rings and brushes is necessary. Accordingly, the rotational power converter is made small in size and its reliability is improved.

Abstract: A variable-speed electromechanical energy converter includes a wound-type induction motor and a power rectifier connected to a secondary winding of the motor to convert AC power produced by the motor into DC power. A chopper is connected to an output of the power converter to control the output thereof according to a control signal and a capacitor is connected through a rectifier device to the chopper. A power inverter converts DC power stored in the capacitor into AC power which is fed back to an AC system connected to the motor. The motor includes a cage rotor disposed between a wound rotor and a rotor shaft, the cage rotor being separated from the rotor shaft by an inner gap and separated from the wound rotor by a middle gap so as to rotate independently of the rotor shaft.

Abstract: A first rotor (9) is disposed on an inner side of a first stator (7) provided with a plurality of coils (19). A second rotor (15) is disposed on an inner side of a second stator (13) provided with a plurality of coils (21). The first rotor (9) is provided with a plurality of protruding poles made of a magnetic material not magnetized. The second rotor (15) comprises a magnet provided with a plurality of magnetic poles. The number of the poles of the second rotor (15) is different from the protruding poles of the first rotor (9). The coils (19) of the first stator (7) and the coils (21) of the second stator (13) are connected in series to an inverter (27). The microprocessor (27) calculates a first AC current with which the coils (19) of the first stator (7) generate a rotating magnetic field rotating in synchronism with the first rotor (9), and a second AC current with which the coils (21) of the second stator (13) generate a rotating magnetic field rotating in synchronism with the second rotor (15).

Abstract: A roller-type electric motor includes a housing having a hollow interior and an inner wall. A plurality of stator poles each of predetermined magnetic polarity are positioned at the inner wall of the housing, and a roller having an outer surface is positioned for rolling movement within said hollow interior of the housing. A plurality of roller poles each of predetermined magnetic polarity are positioned on the outer surface of the roller so that a first one of the roller poles has a magnetic polarity opposite the magnetic polarity of a first one of the stator poles so that the first roller pole is drawn through magnetic action into contact with the first stator pole.

Abstract: A pneumatic bearing motor with a pneumatic bearing capable of being downsized without lowering the mechanical rigidity thereof. A stator of the pneumatic bearing motor comprises a slot-less stator core and winding which is formed by winding a wire on the stator core into a toroidal shape in a maimer of regular winding. Since the stator does not have projections as exist in conventional stators, it is not necessary to form counterbores in a housing and make wall thickness of the housing large for bearing stress concentration caused by the counterbores. Thus, it is possible to reduce the wall thickness of the housing of the motor and downsize the motor.

Abstract: A device for applying tension to yarn or the like, the device including a stator and a rotor. The rotor includes an outer spool around which, in use, yarn or the like is passed and an inner part including a cylindrical sleeve-like portion. The stator includes outer pole piece defining apparatus extending between the outer spool and the sleeve-like portion of the inner rotor part, inner pole piece defining apparatus surrounded by the sleeve-like portion of the inner rotor part and apparatus for producing a magnetic flux between the inner and outer pole piece defining apparatus.

Abstract: A torque motor includes an annular, cylindrically symmetric, stationary inner support ring having an outer surface, and a plurality of inner permanent magnets affixed to the outer surface of the inner support ring. The torque motor further includes an annular, cylindrically symmetric, stationary outer support ring overlying the inner support ring and having an inner surface, and a plurality of outer permanent magnets affixed to the inner surface of the outer support ring. There is an annular, cylindrically symmetric, rotationally movable rotor body ring lying between the inner support ring and the outer support ring, wherein the movable rotor body ring has a plurality of openings therethrough. A plurality of electromagnet rotor coils is supported in the openings on the movable rotor body ring.

Abstract: A stepping motor comprises a stator (3) with at least two magnetic circuits and a rotor (2) that is rotatably mounted on the stator through a single ball bearing having four contact points. The rotor comprises a multipolar magnet (5) essentially in the form of a disc having a central opening (6). One rotor portion (7) is fixed at one radially external portion of the magnet (5), while one radially internal portion of the magnet is arranged within the air gap of said magnetic circuits.

Abstract: A single-phase motor which includes a rotor magnet alternately magnetized to different poles by dividing it along a circumferential direction and in which a coil is disposed in an axial direction of said rotor magnet. Outer magnetized portions of an outer yoke magnetized by the coil and inner magnetized portions of an inner yoke magnetized by the coil are opposed to outer and inner peripheral surfaces of the rotor, respectively. There is also provided a holder for holding the rotor magnet at a position where centers of magnetic poles of the magnet are deviated from a straight line connecting centers of the outer magnetized portions and a rotational center of the magnet when the outer and inner magnetized portions are not magnetized.

Abstract: The nested magic cylinders are rotatable and coaxially arranged so that the bore of the inner cylinder provides a central working space. The predetermined magnetic orientation of each cylinder's sections is arranged to create a relatively strong and uniform magnetic field within the central working space or bore in which copper wires are imbedded to form a core. A core having copper wires embedded within the working space is coaxially positioned within the bore to act as a rotor and when current flows within the copper wires an electric motor is therefore formed. Alternatively, a rotating device can mechanically rotate the rotor or core, inducing a current in the copper wires in the rotor or core thereby forming an electric generator. The sections of the nested permanent magnet cylinders are arranged such that each of the sections have a magnetic orientation forming a pair of coaxial “magic” cylinders or rings that counter rotate with respect to each other.

Abstract: A hybrid-type stepping comprising inner and outer stator yokes on a fixed shaft, a barrel rotor between the inner and outer stator yokes, and bobbin-wound coils in coil slots formed on the outer and inner circumferences of the stator yokes, whereby coil winding operation is facilitated while a high torque is achieved.

Abstract: A combined power driven device is made up of three layers, each of the three layers forming an electromechanical structure such as a stator or an armature. One of the three layers serves as a common magnetic structure for interaction with the electromechanical structures formed by the other two layers and the three layers may be mechanically coupled with each other, a load, and/or an active power source to provide either generator or motor functions, or a combination of generator and motor functions.

Abstract: In an engine-motor hybrid vehicle, vehicle drive regions are divided into a plurality of groups specified by a plurality of operation state variables. A learning variable set for each drive region is updated according to an amount of a power state of an engine, when the vehicle is in a steady state running. The learning variable indicates a change in the power state amount with age. When an engine power demand value is determined, it is corrected by using the learning variable of a selected drive region to calculate a corrected engine power demand value compensating a change in the engine with age. In this manner, the engine power is controlled.

Abstract: The transmission comprises at least three induction systems which are arranged axially one after the other or coaxially one above the other and which can be rotated about a common axis of rotation (4). The induction system in the middle is in each case provided in the side faces with a winding which are connected to one another and are executed in such a manner that the magnetic rotary fields which arise by means of relative movement between the induction system in the middle and one adjacent induction system effect a relative movement between the induction system in the middle and the other adjacent induction system in order to produce an output movement.

Abstract: An actuator, with two independent degrees of freedom, rotates a stage about an axis and moves the stage along the axis, the range of motion defining a cylinder or cylindrical section. The stage is mounted on a hollow cylindrical plunger fitting in an annular well. A bearing allows the plunger to move axially and rotationally, in the preferred embodiment the bearing is an air bearing. The plunger has an array of permanent magnets on its external cylindrical face opposite coils in the well. Equal numbers of oppositely-polarized permanent magnets are arranged in a regular cylindrical pattern at 50% packing density forming rings and columns of like-polarity magnets, the rings of one polarity alternating with rings of opposite polarity and the columns of one polarity alternating with columns of opposite polarity. A set of Z-axis coils (for axial movement) curve around the plunger and are shaped to allow a current in them to produce an axial force with respect to the rings of magnets.

Abstract: A flywheel system suitable for storing energy when demand for energy from a power plant is low, and from which energy can be retrieved when energy demand increases. The flywheel includes (a) a circular composite or metallic glass ring with a radial width limited to less than about 30 percent of the ring's outer radius, and (b) at least one spoke extending along a diameter of the ring, and attached to the ring at either end. The spoke has sufficient radial extendability due to either bending and elastic radial elongation, or only elastic elongation so that, when the flywheel rotates at operating speed, the spoke extends radially to match the radial growth of the ring, without subjecting the flywheel to significant tension at points of attachment of the spoke to the ring. In one embodiment, both flywheel ring and spoke are made of oriented high strength fibers embedded in a thermoplastic resin.

Abstract: Two rotors (3,4) and one stator (2) are arranged coaxially. A common coil unit (6) for individually driving two rotors (3, 4) is provided in a stator (2), and a composite current of an alternating current for driving the first rotor (3) and an alternating current for driving the second rotor (4) is supplied to coil units (6). First salient poles (7B, 7C, 21C, 21D, 21E) facing the first rotor (3), and second salient poles (7D, 21F) facing the second rotor (4), are provided. By setting the number of these salient poles equal to the magnetic pole number ratio of the first rotor (3) and second rotor (4), the number of salient poles is reduced.

Abstract: Two rotors (3,4) and one stator (2) are arranged coaxially. The stator (2) comprises a coil unit (6) which produces, by the supply of a first alternating current, the same number of rotating magnetic fields as the number of magnetic poles of said first rotor (3), and, by the supply of a second alternating current, the same number of rotating magnetic fields as the number of magnetic poles of said second rotor (4). A composite current of said first and second alternating currents is supplied to said coil unit (6), and a circuit (15) is provided for compensating torque fluctuation due to non-uniformity of the magnetic field accompanying the relative rotation of the two said rotors (3, 4).

Abstract: A rotor magnet includes a first polarized layer alternately polarized into different poles while being circumferentially divided into n parts, and a second polarized layer alternately polarized into different poles. An advance phase angle as &thgr;1 with respect to the first polarized layer is set and the magnet is circumferentially divided into n parts. First and second coils are disposed in an axial direction of the rotor magnet. A first outer magnetic pole and a first inner magnetic pole, which are a first stator excited by the first coil, are opposed to an outer peripheral surface and an inner peripheral surface of the rotor, and a second outer magnetic pole, and a second inner magnetic pole which are a second stator excited by the second coil, are opposed to an outer peripheral surface and an inner peripheral surface of the rotor.

Abstract: A motor includes a rotor including a permanent magnet circumferentially equally divided and alternately magnetized to different poles into a cylindrical shape. A first coil and a second coil are displayed inside and axially of the rotor. First outer magnetic poles and first inner magnetic poles are excited by the first coil and are opposed to the outer peripheral surface and inner peripheral surface of the rotor, respectively. Second outer magnetic poles and second inner magnetic poles excited by the second coil are opposed to the outer peripheral surface and inner peripheral surface of the rotor, respectively. The first inner magnetic poles and the second inner magnetic poles are located between the first coil and the second coil, to thereby make the opposed area of the outer magnetic poles, the inner magnetic poles and the magnet large and provide a super-compact motor of a high output and high efficiency.

Abstract: An actuator, with two independent degrees of freedom, rotates a stage about an axis and moves the stage along the axis, the range of motion defining a cylinder or cylindrical section. The stage is mounted on a hollow cylindrical plunger fitting in an annular well. A bearing allows the plunger to move axially and rotationally, in the preferred embodiment the bearing is an air bearing. The plunger has an array of permanent magnets on its external cylindrical face opposite coils in the well. Equal numbers of oppositely-polarized permanent magnets are arranged in a regular cylindrical pattern at 50% packing density forming rings and columns of like-polarity magnets, the rings of one polarity alternating with rings of opposite polarity and the columns of one polarity alternating with columns of opposite polarity. A set of Z-axis coils (for axial movement) curve around the plunger and are shaped to allow a current in them to produce an axial force with respect to the rings of magnets. A set of .phi.

Abstract: An electric motor is provided with active hysteresis-based control of winding current. The motor has an efficient stator winding arrangement, as well as at least one adjustable air gap. Also provided is a stator, windings and air gap adjustment mechanism, as well as a method and system for controlling the torque produced by the motor using active hysteresis-based control of the motor's winding currents. The stator has its windings distributed among arc sections, the windings in each arc section being associated with only one phase of the motor. The hysteresis-based control of winding current is active in that a bandwidth or spread of the hysteresis band is adjusted depending on at least one of several selectively determined factors. The motor and its associated components are particularly well-suited for use in an electrically powered vehicle, as well as in hybrid vehicles using both electric power from a battery and electric power derived from a fuel-burning engine.

Abstract: An inductor-alternator provides highly efficient conversion between mechanical and electrical energy. The inductor-alternator produces increased output by providing armature coils in a single air gap formed between two halves of a toothed rotor. In preferred embodiments, field coils of a magnetic circuit are energized with DC drive current that creates homopolar flux within the rotating rotor. Airgap armature coils are mounted with the field coils to form a stationary assembly that is placed within the single air gap in the rotor so that the changing flux density (due to the rotating teeth) induces an output voltage in the armature coils. The rotor and stationary assembly are mounted in a housing by bolts that may also be used as terminals for the armature coils to reduce assembly complexity and production cost. The combined assembly provides high energy and power density because tip speed of the rotor is maximized and the use of air gaps is minimized.

Abstract: In a motor having a cylindrical stator fixed to a motor housing and inner and outer rotors concentrically arranged to the stator, a cooling structure of the motor includes cooling jackets formed in the stator. Coolant inlet and outlet ports are provided at an axial end of the rotor which end is opposite to an output end portion of the outer rotor. The coolant inlet and outlet ports are connected to the cooling jackets to supply and discharge coolant to and from the cooling jackets. A coolant return portion is provided at the other axial end of the rotor and connects each pair of the cooling jackets.

Abstract: A rotary electrical machine has at least one stator and a rotor. The stator includes at least one armature winding received in at least one pair of slots. The rotor includes flux switching arrangement, which is adapted for selectively establishing closed magnetic circuits which pass around the turns of the armature winding. The arrangement for switching the flux comprises at least one permanent magnet adapted to establish a magnetic flux which is looped on itself in one circumferential direction of the rotor, together with at least one excitation winding for establishing an adjustable magnetic flux locally in a circumferential direction opposite to the direction of the flux produced by the magnets.

Abstract: A permanent magnet generator is described. The generator includes a shaft which defines a longitudinal axis. A rotatable magnetic field assembly is mounted on the shaft and adapted for rotation about the shaft. The magnetic field assembly includes a plurality of axially magnetized magnets which are retained in a cavity about the shaft for generating an axial magnetic flux. A plurality of vanes are mounted on the magnetic field assembly housing for rotating the magnetic field assembly about the shaft when a fluid flows past the vanes. A stationary armature assembly is also located around the shaft in a position axially spaced from the magnetic field assembly. The armature assembly generates AC power when the magnetic field assembly is rotated. The stationary armature assembly includes an armature housing. An axial bore is formed through the armature housing for receiving the shaft. The armature housing defines a cavity about the axial bore in which a plurality of laminated bars are retained.

Abstract: A motor of an increased output is provided by forming a rotor, composed of a permanent magnet circumferentially divided into equal sections and alternately magnetized in different magnetic poles, in a cylindrical shape, positioning a first coil, the rotor and a second coil along the axial direction of the rotor, providing a first outer magnetic pole and a first inner magnetic pole, magnetized by the first coil, in opposed relationship, respectively, to the external and internal peripheries of the rotor, also providing a second outer magnetic pole and a second inner magnetic pole, magnetized by the second coil, in opposed relationship respectively to the external and internal peripheries of the rotor and positioning the first outer magnetic pole and the second outer magnetic pole in an axially opposed relationship with a mutual displacement by a predetermined phase angle, or forming the ends of the first and second outer magnetic poles in a tapered shape, thereby decreasing the leaking magnetic flux.

Abstract: A superconducting rotating machine includes a direct current field excitation source and an alternating current armature winding mounted on a stationary support member, at least one of which includes a superconducting material, a core member formed of a magnetic permeable material and rotatable around the static support member, and a refrigerator unit which cryogenically cools at least one of the field excitation source and the armature winding. The superconducting rotating machine may have a construction for providing polyphase (e.g., three-phase) power.

Abstract: Two rotors (3,4) and one stator (2) are arranged coaxially in a three layer construction. A coil unit comprising plural coils (6) arranged at equal angular intervals on a stator (2) is provided. The coil unit forms rotating magnetic fields of identical number to the magnetic pole number of the first rotor (3) according to a first alternating current, and forms rotating magnetic fields of identical number to the magnetic pole number of the second rotor (4) according to a second alternating current. Plural rotors (3, 4) are driven by a single coil unit by supplying a composite current of the first and second alternating currents to the coil unit.

Abstract: An electrical motor includes a cylindrical magnet divided into n regions circularly around at least an outer circumference thereof that are magnetized in alternate polarities. The motor also includes first and second coils arranged in an axial direction of the magnet. The magnet is interposed between the first and second coils. The motor further includes first and second external portions excitable by current flowing through the first and second coils, respectively, so that these portions become first and second external magnetic poles, respectively. The first and second external portions face the outer circumference of the magnet at one side and the other side thereof, respectively. The area of the first and second external portions facing the outer circumference of the first and second coils, respectively, is equal to or smaller than three-quarters of the area of the outer circumference of the first and second coils, respectively.

Abstract: The invention concerns a permanently excited transverse flux machine which requires only one permanent magnet segment per phase and per magnetic circuit. The magnetic flux generated by a permanent magnet segment (3) flows alternately through the soft magnetic body on two conductor rings (7) of this transverse flux machine. The conductor rings (7) are arranged on different sides of the permanent magnet segment, the direction of flux in the permanent magnet segments corresponding to the direction of magnetic flux in the two air gaps through which said flux passes. Preferably, the permanent magnet segments are arranged between two U-shaped halves of a square wound C-core constituting the rotor bodies (5). The stator bodies (6) are also prefabricated from grain-oriented materials as U-shaped C-cores.

Abstract: A cylindrical or radial air gap, electrical machine is defined which comprises a circular rotor section having a serrated circular surface area mounted on a shaft with rotation means, two or more circular stator sub sections having circular serrated surface areas are assembled around the circular rotor section, which define an air gap between them. Normally after stator sub sections are assembled around the circular rotor section, end brackets or housings units are usually clamped around them.

Abstract: A two-phase brushless direct-current (BLDC) motor having a single Hall effect device. The BLDC motor includes a stator comprised of 2n coils grouping as first and second phase coils at a uniform interval, and a rotor which N-pole and S-pole magnets of the same number as that of the stator coils are alternately disposed, the 2n magnets forming n pairs, each pair of magnets are disposed at a uniform interval, wherein a distant ratio from the center of one N-pole magnet to the centers of the S-pole magnets adjacent the N-pole magnet is established into 1:1.4. Since 2n auxiliary magnets are disposed annularly on the rotor with the same length as each other corresponding to the N-pole and S-pole magnets, a single Hall effect device detects the magnetic pole by magnetic flux of the rotating auxiliary magnets and generates the rotating position signal of the rotor, so that a switching controller can activate the first and second phase coils alternately.

Abstract: A drive unit for transport devices comprises a spindle (1) with a stator (2) and, mounted on said spindle so as to be capable of rotation, a rotor (3), all these elements forming an electric motor (4) and a rim (5). The device is provided with permanent magnets (6, 7, 8, 9), cores (10) with coils (11), and sensors (12) for determining the angular position of the rotor (3). The rotor (3) is designed as concentric shells (13,14) and joined to the rim (5). The permanent magnets (6, 7, 8, 9) are mounted on the sleeves (13, 14), each magnet facing another magnet of opposite polarity; on each sleeve (13, 14) permanent magnets (6, 7, 8, 9) are mounted so that their polarity alternates. The stator (2) is located between the permanent magnets (6, 7, 8, 9) and carries the coils (11) with cores (10), the coils being connected around the periphery to the stator (2) and arranged with gaps between themselves and the permanent magnets (6, 7, 8, 9).

Abstract: An autonomous generation brake having a dynamo, following rotation of a first rotor of an annular magnet in the core area an even number of armature coil with alternating polarities inside the first stator on the outer periphery are induced to produce an alternate current potential to be rectified at a rectifier wherefrom rated direct current is delivered to stimulate respective magnetic coils on the second stator of a braking device enclosing the dynamo; the second stator clamping internally a second rotor of a metal checked heat diffusion ring so that once the second rotor turns in rotation and respective magnetic coil on the second stator are stimulated, the interrelated movement occasioned thereby will induce a vortex upon the second rotor, meantime produce a braking torque sufficient to rapid diffusion of magnetically induced heat as well as the braking heat. Magnitidue of the direct current outgoing from the rectifier maybe regulated by a pulse regulator.

Abstract: A two-phase electro-mechanical stepper motor having 1) a high ratio of torque per mass and torque per power draw, to be able to develop required rotating torque, 2) a magnetic circuit that allows developing of a significant holding torque while using a limited amount of electric power, and 3) two disk rotors positioned on either side of the stator with aligned poles. The actuator has a shaft extending into the actuator, and a first and second rotor, each fixedly mounted on the shaft, and each having a permanent magnet mounted thereon in opposing fashion. Additionally, there is a stator, loosely mounted around the shaft and positioned between the opposing permanent magnets, and having at least a first and second pole extending toward the first and second rotors respectively.

Abstract: An electrical machine has a rotor shaft (12) which carries a plurality of rotor discs (14) for rotation therewith. Each rotor disc (14) has pairs of rotor rims (16) secured thereto. Each rotor rim (16) consists of a single row of alternate magnets (20) and laminated pole pieces (18) and is opposed by a series of stator cores (22) which straddle the rotor rim (16). Armature windings (24) are disposed within the stator cores (22) for operably exciting said stator. The phase relationship between the currents through the armature windings (24) and the orientation of the stator cores (22) or the magnets (20) in opposing rims (16) are such that the effects of electromagnetic coupling, long path fluxes and torque ripple is reduced.

Abstract: In a motor, a rotor made of a permanent magnet which is equally divided in the circumferential direction to be alternately magnetized to different poles is formed into a cylindrical shape. The first coil, the rotor, and the second coil are sequentially arranged in the axial direction of the rotor. The first outer and inner magnetic poles excited by the first coil are set to oppose the outer and inner circumferential surfaces, respectively, of the rotor, and the second outer and inner magnetic poles excited by the second coil are set to oppose the outer and inner circumferential surfaces, respectively, of the rotor. The rotor is constituted by a rotor shaft, the permanent magnet, and an intermediate ring for holding the rotor shaft and the permanent magnet. The motor has good machinability.

Abstract: A magnetic actuator for accomplishing relative movement between an excited actuator member and a passive actuator member, comprising: a magnetic excited actuator member configured to define along its active surface a series of external teeth separated by slots, with a back iron area behind the teeth and slots to complete the flux paths within the excited member, with actuating electrical conductors disposed within the slots to accomplish a distributed conductor electric coil arranged such that the current flows in opposite directions in the conductors in each adjacent slot, to create oppositely-directed flux paths that additively combine in the tooth between the adjacent slots to accomplish a high level of magnetic force with a lower back iron thickness; and a magnetic passive member proximate, and spaced from, the excited member active surface, the passive member completing the flux paths; whereby the position of the passive member relative to the excited member can be controlled through control of the curre

Abstract: A torque motor includes an annular, cylindrically symmetric support base, and a plurality of electromagnet coils affixed to the support base at regular intervals around a cylindrical circumference of the support base. There is additionally an annular, generally cylindrical, rotationally movable rotor ring overlying the support base and having an inner surface, and a plurality of permanent magnets affixed to the inner surface of the rotor ring at regular intervals around a cylindrical circumference of the rotor ring. The number of permanent magnets is even and equal to the number of electromagnet coils, and the permanent magnets are arranged in alternating polarities around the circumference of the rotor ring. In a preferred form, there are six of each type of magnet, spaced equidistantly around the circumference of the respective rings.

Abstract: Known multi-phase electric machines have conductor lanes which do not sufficiently utilize the space available in the grooves and winding overhang or which are costly to produce. Besides a good utilization of the available space, the length of the conductors in the winding overhangs should be kept short in order to obtain high effiency and power densities, and the number of different conductor designs should be minimized in order to reduce production costs. According to the invention, the electric machine consists of several electric pole units which have each a small number of phases and poles with alternating polarity in the direction of displacement. The electric pole units are located next to each other in the air gap and are mutually offset by a fraction of a pole pitch with respect to the rotor poles. Their meandering rectangular conductor wires extend in layers parallel to the air gap.

Abstract: A flywheel energy conversion device provides highly efficient conversion between kinetic and electrical energy. The flywheel produces increased output by providing armature coils in an air gap formed about the flywheel (both radial and axial embodiments are described). In preferred embodiments, field coils of a magnetic circuit are energized with DC drive current that creates homopolar flux within a rotating solid rotor having teeth cut from a flat disk. The total reluctance of the magnetic circuit and total flux remain substantially constant as the rotor rotates. The flux may travel radially outward and exit the flat disk through the teeth passing across an armature air gap. Airgap armature coils are preferably utilized in which the changing flux density (due to the rotating teeth) induces an output voltage in the coils.

Abstract: In a motor, a rotor made of a permanent magnet which is equally divided in the circumferential direction to be alternately magnetized to different poles is formed into a cylindrical shape. The first coil, the rotor, and the second coil are sequentially arranged in the axial direction of the rotor. The first outer and inner magnetic poles excited by the first coil are set to oppose the outer and inner circumferential surfaces, respectively, of the rotor, and the second outer and inner magnetic poles excited by the second coil are set to oppose the outer and inner circumferential surfaces, respectively, of the rotor. An electric element is arranged at a position to oppose, across a predetermined gap, the circumferential surface of the permanent magnet not covered with the first or second outer magnetic pole. Alternatively, an electric element and a circuit pattern are formed on a connection member that connects the first and second outer magnetic poles to each other.

Abstract: The present invention refers to an electric motor comprising a stator with an internal permanent magnet and a tubular magnetic return sleeve surrounding said permanent magnet whereby an annular air gap is formed therebetween, said magnetic return sleeve being held at its axial and radial positions relative to said permanent magnet by a frame of plastic material injected around these two components and being connected to said permanent magnet by said plastic frame. The present invention aims at improving the manner in which the two structural components are attached to and positioned on one another.

Abstract: The gap tube motor comprises a rotor, a stator and a gap tube which is arranged between the rotor and the stator, with at least two bearing apparatuses being arranged with a spacing in the axial direction (A) with respect to the rotor, and with at least one of the bearing apparatuses being designed as a bearing and drive apparatus and comprising both an electrical motor drive apparatus and a magnetic bearing apparatus in order to both drive the rotor and to journal the rotor in the radial direction without contact using this bearing and drive apparatus.