Abstract: In a low speed geared motor, a rotational magnetic field is formed in a stator against S-poles and N-poles in a permanent magnetic ring capable of being elliptically deformed. An external gear is rotated while internally meshing with an internal gear by means of rotation of the elliptical deformation caused in the permanent magnetic ring by the rotational magnetic field. As a result, the external gear is rotated on its axis by a difference between the number of teeth in the external gear and that in the internal gear for one rotation of the elliptical deformation. The rotational component is transmitted to an output shaft through a transmission means while absorbing the elliptically deformed component. With this construction, it is possible to enhance the energy conversion efficiency with a small size, to achieve a longer continuous operation, to almost eliminate backlash and hysteresis, to reduce the angular momentum, to improve.

Abstract: An a.c. electrical machine includes a plurality of first elements spaced from each other; a plurality of second elements spaced from each other and interstitially disposed with the first elements; a plurality of electrical windings on each of the first elements providing a current flow in a first direction; and a return for completing a magnetic flux path in a second direction perpendicular to the first direction on successive first elements and through the second elements for generating a force in a third mutually perpendicular direction between the first and second elements.

Abstract: A squirrel cage type rotor for a high speed electric motor comprises longitudinally extending bars which are in electrical contact with, but not affixed to, conductive end rings of the rotor. The bars are electrically conductive and are each affixed to the armature core at a single point located intermediate the end rings.

Abstract: A pole core with pole lips serves for fixing a field winding in the pole housing of a direct current motor. The pole core has a central pole body mountable on an inner side of the pole housing. The pole lips are formed of one piece with the central pole body and are resiliently and springily connected to the central pole body, so that the field coil can be pressed against the pole housing in an elastic springy manner without additional spring elements, so that no damage occurs to the insulating coat of the coil.

Abstract: A micro electro mechanical device has at least two layers of substrates. In a first layer, a micro-actuator is formed, and in a second layer facing to the first layer, a passive movable unit is formed. Rotation of the rotor unit of the micro-actuator is coupled to the movable unit on the second layer by suitable engaging means.

Abstract: An improved commutator anchoring system and methods of manufacturing such a system are disclosed. The system includes a wound fiberglass or other ring embedded in the internal core of the commutator to reinforce the resulting structure and enhance its thermal and mechanical stability. The reinforcing ring also functions as a form about which various anchors can be patterned, increasing their uniformity over free-form designs.

Abstract: A permanent magnet alternator includes a stator core having outwardly projecting teeth and further includes a plurality of permanent magnets surrounding the stator core. The stator core is formed from a continuous, helically wound metallic strip having a plurality of teeth defined between slots formed in one edge thereof. The stator core is formed by winding the strip edgewise around a cylindrical mandrel. To facilitate winding and avoid distortion, arcuate regions, conforming to the curve of the mandrel, are formed in the strip opposite the teeth.

Abstract: The invention relates to a carbon brush (10) with a braided indicator wire (26), (28) for indicating a defined wear of the carbon brush. The braided indicator wire is embedded in a blind bore (30), and is disposed spaced apart from the bottom (32) of the blind bore. To assure an exact indication of the wear of the carbon brush, the bottom of the blind bore is covered with a layer (40) consisting of an insulating material.

Abstract: A connecting element for a wire end, especially where the wire is a motor vehicle alternator winding, the connector then connecting the wire to slip rings, is formed with a channel for receiving the wire end, this channel being defined between two lugs in facing relationship with each other and joined together through a connecting portion which constitutes the base of the channel. The lugs are bent towards each other so as to grip the wire end. At least one of the lugs has a slot arranged at the level of at least one lateral edge and close to the connecting portion. A portion of the wire end which is bent through about 180.degree. is received in the slot, this bent portion of the wire joining a first portion of the wire end, which extends into the channel, to a second portion of the wire end which extends outside the channel. A separate slip ring unit having such connecting elements, for fitting on an alternator shaft, is also disclosed.

Abstract: Past methods and apparatus for manufacturing a rotor assembly have been used to provide rotor assemblies for rotating electric machines. Many of these electric machines rotate at low speeds. The present method and apparatus for manufacturing a rotor assembly can be used to make a rotor assembly to be used at high speeds. The rotor assembly includes a shaft having a frustoconical mounting surface defined thereon and having a plurality of magnets attached to the frustoconical mounting surface. A cover having a frustoconical inner surface surrounds the magnets and compressively secures the magnets to the shaft. The compressive forces applied by the cover and the adhesive used to secure the magnets insuring that a positive contact pressure exists between the magnets and the shaft during operation of the electric machine.

Abstract: A sinusoidally distributed winding method suitable for a detector winding comprises the steps of serially connecting winding groups (x) wound sequentially at one-slot intervals to form a one-phase shunt winding group (y), and constructing an n-phase shunt winding group (Z) using n of the one-phase shunt winding groups (y). An automatic winding can be performed based on the winding procedure group wound sequentially at one-slot pitch intervals.

Abstract: The winding overhang support of a turbo-generator comprises an inner ring (12) which fits closely, either directly or with the insertion of an interlayer (14), against the ends of the turns of the stator winding (4, 5), which ends widen like an internal taper, and a multipart external support comprising rings (9, 27) and supporting brackets (7). The supporting brackets (7) are attached to the end of the stator core end plate (3) of the laminated core. The first outer ring (9), which is composed of insulating material, fits closely against the outside of the free ends of the supporting brackets (7). The second outer ring (27) is manufactured from high-strength nonmagnetic steel and is supported on a shoulder (26) on the stator core end plate (3) and is attached to the supporting brackets (7). There are double-wedge clamps (16, 17, 20) between the inward-facing surfaces (18, 19) of the supporting brackets (7) and the ends of the turns.

Abstract: The present invention pertains to a rotor for permanent magnet-excited electric machines, on the circumferential surface of which permanent magnets are arranged, and fillers made of a nonmagnetic material are arranged between them, wherein the surface of the permanent magnets and fillers on the whole are made slightly conical and are covered by a separately manufactured binding under prestress.

Abstract: A variable reluctance electric motor includes a stator having a plurality of axially extending inner teeth and a rotor assembly rotatably supported therein. The rotor assembly includes a shaft having a plurality of rotor pole sub-assemblies provided thereon. Each of the rotor pole sub-assemblies includes a hub secured to the shaft, a pair of annular rotor packs secured to the ends of the hub, and an electromagnetic coil disposed loosely about the hub between the two rotor packs. Each of the rotor packs has a plurality of axially extending outer teeth formed thereabout which are disposed adjacent to the inner stator teeth. The rotor pack teeth of each of the rotor pole sub-assemblies are angularly offset from one another, preferably by equal amounts. The electromagnetic coils are engaged by the stator such that the rotor assembly is free to rotate relative thereto.

Abstract: A cylindrical shielding plate is provided on an inner circumference of the cylindrical recess formed on the bracket of an electric motor of a magnetic disk drive, and an open sector of the stator core is arranged to coincide with the moving direction of read/write head. Or a cylindrical boss is inserted between the stationary shaft and the stator core. Thereby, high frequency electromagnetic noise to the magnetic disk is drastically reduced.

Abstract: The present invention prevents the degradation of the power generating efficiency of an alternating current generator by preventing the expansion of an air gap formed between pole cores and a stator core, achieves low-noise operation by preventing generation of high-frequency impact magnetic noise, and makes it possible to relieve strains applied on a magnet holder. The present invention utilizes sixteen magnets, each of which fits between two of sixteen claw-like magnetic poles formed on the outer periphery of Lundell-type pole cores, which rotates integrally with a shaft. The magnets are caught and stopped by a magnet holder which has been formed by interconnecting zig-zagging segments and has elasticity as a whole. Here, the permanent magnets are held by the magnet holder so that the magnet holder does not protrude towards the rotor side from the outer peripheral face of the Lundell-type pole cores and the contacting faces of the magnet holder contact the outer faces of the permanent magnets.

Abstract: A binded carbon brush includes a brush main portion formed mainly of carbon, and an electric conductor formed by a material, such as a copper powder, having an electric resistivity lower than that of the brush main portion and extending along a main current direction of the brush. In the cross section of the brush perpendicular to the main current direction, the diameter or the vertical and horizontal sizes of the conductor is so set as to be smaller than both the vertical and horizontal sizes of the brush main portion.

Abstract: A homopolar dynamoelectric machine comprises a solenoid coil for generating a magnetic field, having a cavity formed around an axis thereof. A rotating shaft, which constitutes a rotor, is rotatably provided in the cavity about the axis. A circular plate, which also constitutes the rotor, is integrally fixed on the shaft. A rotating body is rotatably supported by the plate about an axis of the shaft. A first electric current path, through which an electric current can pass from a proximal portion to a distal portion of the rotor, is integrally provided in, for example, the plate. A second electric current path, through which an electric current can pass from a distal portion to a proximal portion of the rotor, is integrally provided in the rotating body. The first and second paths are electrically connected in series, and are adapted to be electrically connected to a power supply in order to supply a direct current to these paths.

Abstract: A permanent magnet type rotating machine comprises a cylindrical yoke; a plurality of permanent magnets installed on an inner periphery of the cylindrical yoke; a rotor rotatably installed at an inner peripheral portion of the plurality of permanent magnets; and a retaining portion provided at a conventional constituent member of the permanent magnet type rotating machine to elastically retain the plurality of permanent magnets in an axial direction.

Abstract: A synchronous inductor electric motor includes a hollow stator having a plurality of permanent magnets secured to the inner surface thereof. The magnets are radially polarized in alternating fashion about the inner circumference of the stator. A plurality of radially inwardly extending stator teeth are provided on each of the magnets so as to exhibit a polar magnetization which is the same as the adjacent magnets. A rotor assembly supported concentrically within the stator includes a shaft having a plurality of rotor pole sub-assemblies provided thereon. Each of the rotor pole sub-assemblies includes a hub secured to the shaft, a pair of annular rotor packs secured to the ends of the hub, and an electromagnetic coil disposed loosely about the hub between the two rotor packs. Each of the rotor packs has a plurality of axially extending outer teeth formed thereabout which are disposed adjacent to the inner stator teeth.