Abstract: In a flywheel energy accumulator comprising a vertical shaft rotatably supported in a vacuum housing by superconduct ive magnetic axial support bearings, lower and upper flywheels are mounted on the shaft in axially spaced relationship, a homopolar dynamic machine with a rotating magnetic field is disposed in the space between the flywheels and includes a stator supported in, or forming part of, the housing and a rotor mounted on the shaft so as to be disposed within the rotor, and the superconductive magnetic supporet bearings include a lower passive axial thrust bearing with an annular magnet disposed below the lower flywheel and an upper positive axial pull bearing with an annular magnet disposed above the upper flywheel and disc-shaped superconductors disposed adjacent the annular magnets such that both bearings provide magnetic forces jointly counteracting the gravity forces of the shaft, the rotor and the flywheels.

Abstract: A rectifier arrangement of an alternator for a vehicle includes a frame and a cover for a rectifier. The rectifier arrangement is composed of a plus-potential cooling-fin disposed in a space between the cover and the frame at a portion close to the cover in parallel therewith, a minus-potential cooling-fin disposed in the space in parallel with the plus-potential cooling-fin, a fastening member fixed to the frame and extending through mounting holes of the plus-potential and minus-potential cooling fins, a cylindrical bushing made of thermosetting resin disposed in a space formed by the cover, plus-potential cooling-fin and fastening member.

Abstract: A cost-efficient vibration-isolating mounting for motors including a pressed or stamped metal motor mount (12) upon with the motor is mounted and a vibration-isolation pad (14) upon which the motor mount (12) is mounted. A clamp formation (42) at each end of the vibration-isolation pad (14) so that a respective thru-bolt (48) secures the motor mount (12) and the assembled vibration-isolation pad (14) to a supporting floor (16) or wall structure. The vibration-isolation pad (14) includes a set of bumpers (40) at each corner to retain the motor mount (12) in place on the top of the vibration-isolation pad (14).

Abstract: Winding holding means 8 for retaining windings 6 are respectively provided at axially opposite end portions of each pole protrusion 5 of a stator on the inner peripheral side of the pole protrusions.

Abstract: A torque motor comprises a rotor having a pair of permanent magnet groups, and a pair of stator cores. Each magnet group includes a plurality of plate and rod-shaped permanent magnets arranged in a circumferential direction. The magnet groups are arranged asymmetrically with respect to a rotary axis of the rotor. That is, one magnet group is displaced one-half angle of the pitch angle of each permanent magnet from the symmetric position of the other magnet group with respect to the rotary axis of the rotor. Alternatively, the stator cores are arranged asymmetrically with respect to the rotary axis of the rotor so that a front end of one stator core is displaced from the symmetric position of a front end of the other stator core in the circumferential direction. A circular arc angle for one of the stator cores ends facing the rotor is greater than a circular arc angle for the other stator core facing the rotor. Accordingly, a range of a torque generating angle of the motor is increased.

Abstract: Rotors and methods of assembling such rotors for electric motors are described. In one embodiment, the rotor includes a substantially cylindrical core having substantially planar first and second end surfaces and a substantially cylindrical body portion. The rotor core body portion has first, second and third body sections. The first body section has an outer diameter less than an outer diameter of the second body section, and the third body section has an outer diameter approximately about equal to the outer diameter of the first body section. The first and third body sections sometimes are referred to as end sections or core extensions. A plurality of radially arranged rotor bar slots extend through the body portion, and a plurality of rotor bars are cast in the rotor bar slots. The rotor bar slots in the end sections have a first geometric cross-sectional shape and the rotor bar slots in the second body section have a second geometric cross-sectional shape.

Abstract: An electrohydraulic unit for controlling pressure in slip-controlled motor vehicle brake systems comprises a hydraulic block, with an electric motor mounted on a first side, and a control unit secured to an opposite second side of the hydraulic block. Electrical terminals of the electric motor are passed through the hydraulic block and are embodied inside the control unit as resilient contact means. The contact means engage contact faces of the control unit with an initial stress. The resilient contact means make electrical plugs in the control unit unnecessary, and they compensate for tolerances in and transverse to the mounting direction of the electric motor and control unit.

Abstract: The wiper motor unit for a motor vehicle includes a case comprising a base and a cover adapted to close the base and define an inside enclosure of the case, the motor unit having a duct adapted to convey a liquid, isolated from the inside enclosure, and defined by one element of the base and the cover, the motor unit further including an outlet shaft. The duct extends outside the shaft.

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 constructed by tightening set bolts to secure a yoke opened at one end to a bracket mounted on the yoke open end. The outer ring of bearings is press-fitted into the yoke, the inner ring of the bearings is press-fitted around an armature shaft, and the bearings are free from an undue excessive axial load during the tightening the set bolts, without the need for fixing the outer ring to the yoke. A gap between the inner ring of the bearings and a step portion of the armature shaft for restricting the displacement of the inner ring toward the yoke open end, or a gap between the outer ring of the bearings and the closed end of a bearing housing for restricting the displacement of the outer ring in the direction opposite the direction toward the yoke open end, or the sum of both gaps, prior to tightening the set bolts, is set to be greater than the axial deformation of the yoke resulting from the tightening of the set bolts.

Abstract: A reluctance machine system including a reluctance machine having a stator including at least one phase winding and a rotor defining rotor poles and inter-pole gaps, where permanent magnet inserts are positioned within the inter-pole gaps to interact with the currents in the phase windings to provide permanent magnet torque and to improve the machine's performance.

Abstract: A system and method for facilitating the reduction or elimination of end play associated with an armature in an electric motor is disclosed. The system and method utilize an end play assembly which includes a housing having an integrally molded lock for retaining a screw in an unengaged and locked position. The end play assembly also includes a coil spring which urges the screw towards an engaged and unlocked position when the end play assembly is mounted in a housing of the electric motor. The lock includes at least one wing portion which engages a notch on the housing of the electric motor such that when the end play assembly is mounted in the motor housing, the notch forces the lock into the unlocked position which releases the screw so that the spring can urge, rotate or screw the screw to cause a screw end to be forced into engagement with the end of an armature of the electric motor.

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: A linear motor apparatus includes a mover, a stator, a detector, and a driver. The mover is adapted to be shifted along a shifting direction, and has a predetermined magnetic flux distribution. The stator has a plurality of coils aligned along the shifting direction of the mover. The detector detects the relative position of the mover with respect to the stator. The driver excites two or more coils simultaneously based on a predetermined target value and the output of the detector.

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: An electromagnetic equipment such as dynamoelectric machine includes an electromagnetic coil formed by winding an insulated wire. The insulated wire is made of a bare conductor having, on its surface, two layers of an insulating coating composed of a varnish and a low-resistance conductive coating composed of a heat resisting varnish containing a conductive oxide. A coil formed of the insulated wire is applied to the whole electromagnetic coil or a coil part near a power supply terminal.

Abstract: In a multiple parallel conductor (1), in particular a continuously transposed cable, used for windings of electrical devices and machines, each strand has its own electrical insulation and all strands are provided with a common wrapping. Underneath the wrapping (9), there is arranged at least one rip cord (11) extending in the longitudinal direction of the multiple parallel conductor (1) for easy removal of the wrapping (9) before a winding is formed.

Abstract: Lead wires of large electric motors are routed through annular shrouds located inside of the motor housing to surround respective stator coilheads. Each of the shrouds includes at least one attachment portion defining an opening for passage of the leads. In one embodiment, a support element defining a lead channel aligns with the lead opening. The support element includes a mounting structure for attachment of a conduit box thereon. A seal arrangement having a planar seal element may be provided in the lead channel to support and separate the individual leads, while providing a seal to inhibit passage of cooling air from the housing interior into the conduit box. In another embodiment, a cover arrangement is attached directly to the attachment portion of the shroud. The cover arrangement may include a flexible gasket juxtaposed to a rigid cover plate.

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: A winding element for an electrical machine, in particular a turbogenerator, includes an electrically conductive conductor configuration for carrying an electric current, an insulating layer surrounding the conductor configuration and a protective configuration surrounding the insulating layer. The protective configuration includes an isolating layer disposed like a helix, and an at least slightly electrically conductive contact layer likewise disposed like a helix and overlapping itself. The contact layer traverses or passes through the isolating layer from an inner side facing the insulating layer to an outer side facing away from the insulating layer. A winding assembly for an electrical machine includes an electrically conductive winding support and a winding element circumferentially surrounded and electrically contacted by the winding support.