Abstract: An electric rotating machine has a rotor, a stator and a casing. A planetary roller mechanism constituted by a sun roller, a planet roller, a ring roller and a carrier is provided within the rotor so as to transmit the driving force of the rotor to the outside from a power shaft. Oil is sealed within the rotor or the casing. The planetary roller mechanism may be provided within the casing or at the outside of the rotor and, in this case, oil is sealed within the casing.

Abstract: A magneto-generator capable of suppressing temperature rise of an armature winding and ensuring an improved electricity generation efficiency includes a flywheel having a cylindrical peripheral wall formed with a flat bottom wall at one end thereof, a plurality of magnets disposed on and along an inner peripheral surface of the cylindrical peripheral wall, a generator coil disposed internally of the flywheel in opposition to the magnets for generating electricity under electromagnetic induction taking place between the magnets and the generator coil, ventilating through-holes formed in a joined portion of the cylindrical peripheral wall and the flat bottom wall so as to extend partially through both of them, and upstanding fins disposed on the bottom wall for generating forced air flows from interior to exterior of the flywheel through the ventilating through-holes upon rotation of the flywheel.

Abstract: In a side-mount type vehicle alternator, the mounting faces of a larger stay and a smaller stay are arranged such that the fictive line, which runs through the center of a mounting hole on the mounting face of the larger stay and the center of the mounting hole on the mounting face of the smaller stay, is on the outside of an outermost surface of a front frame and a rear frame. Thus, the alternator is lifted up from an engine bracket and it is possible to make a large space. Hot air being exhausted from exhaust windows flows smoothly to the outside of the space.

Abstract: A non-conductive insulating ring (210) is inserted between a motor bell (130) and a motor bearing (135) that supports a motor shaft (110). Stray currents that normally discharge thorough the motor shaft and the motor bearing to the motor bell are prevented due to the non-conductive nature of the insulating ring. Additionally, the motor shaft is grounded to provide a low-impedance alternative path to stray shaft currents. When a fast-switching frequency converter is used to drive the motor shaft, additional arrangements such as a common mode choke, reduction of the switching frequency of the converter, and reduction of the turn-of/off rate of a semiconductor device used in the converter, may be provided to further reduce the stray currents flowing thorough the motor bearings.

Abstract: A vehicular alternator is provided which can effectively utilize the magnetic flux of a permanent magnet disposed between claw-type magnetic poles and can improve an output of the alternator. The vehicular alternator comprises a rotor and a stator constituted by coiling stator windings over a stator core, the rotor comprising a pair of claw-type magnetic poles arranged in an opposed relation, a permanent magnet disposed between adjacent two of a plurality of claws provided on the pair of claw-type magnetic poles, and field windings coiled radially inward of the plurality of claws. Each of the plurality of claws of the rotor is formed to have a shape coming into contact with the whole of a magnetic pole surface of the permanent magnet.

Abstract: Functional elements are difficult to mount on a housing based on known methods, on which at least one functional element for an electric motor is situated. A housing is configured such that functional elements to be mounted on the housing are mountable on the housing from the outside.

Abstract: A commutator bar (10) includes a body and first and second anchors disposed in spaced relation with each anchor and coupled to a proximal end of the body. A free end of the first anchor (13) extends in a direction towards the proximal end H of the body, and a free end of the second anchor (12) extends in a direction towards a distal end (0) of the body. Third and fourth anchors (17) and (18), are disposed in spaced relation and each have one end coupled to a distal end of the body and a free end extending in a direction towards the proximal end of the body. Fifth and sixth anchors (15) and (16) each have one end coupled to the body at a location between the proximal and distal ends. A free end of the fifth anchor extends toward one side of the body and a free end of the sixth anchor extends toward the other side of body.

Abstract: A stator for an electric machine includes a generally cylindrically-shaped stator core having a plurality of circumferentially-spaced and axially-extending core teeth that define a plurality of circumferentially-spaced and axially-extending core slots extending between first and second ends of the stator core. Within the core is a stator winding having a plurality of phases, each of the phases including a pair of conductors connected in parallel and having a plurality of slot segments housed in the core slots. The slot segments are alternately connected at the first and second ends of the stator core by a plurality of end loop segments. The conductors within each pair of each phase are connected in parallel and are in phase with one another such that the stator core has two slots per phase per pole.

Abstract: An on-board marine electrical power generator (14) containing a conventional four-stroke, water-cooled outboard motor engine (50) coupled to an alternator (52) upon a transportable frame (44) suitable for mounting on-board a boat. In one embodiment, the crankshaft (60) of the engine extends vertically and is coupled to a vertically oriented rotor (72) of the alternator, either directly or laterally spaced from the engine shaft. In another embodiment, the engine is modified for operation with its crankshaft extending horizontally. The physical size of the overall package is advantageously within a range suitable for installation on pleasure boats, even below deck.

Abstract: In a rotary electric machine capable of improving the reliability of an object provided with the same, a permanent magnet type synchronous rotary electric machine comprises has a stator provided with windings. A rotor arranged supported for rotation in the stator with a gap between the inner surface of the stator and the outer surface thereof, is divided into two rotor bodies each provided with permanent magnets of opposite polarities alternately arranged in a circumferential direction. In switching the permanent magnet type synchronous rotary electric machine from a motor to a generator, a second rotor body is moved axially relative to a first rotor body to an axial position that makes the intensity of a combined magnetic field created by the permanent magnets lower than that of a combined magnetic field created by the permanent magnets when the second rotor body is located at a predetermined position, and then the second rotor body is moved to the predetermined position.

Abstract: An apparatus for and a method of construction of a spindle motor having a bearing unit, a rotary shaft, a rotary hub member and an electro-magnetic motor is presented. The rotary shaft has a flange attached at a mid-section in an axial direction, between large and small diameter sections of the rotary shaft. Grooves between the bearing unit, rotary shaft and flange create radial dynamic pressure generating areas, each with as long as possible a span, and thrust dynamic pressure generating areas to both sides of the flange.

Abstract: A permanent magnet field small DC motor includes an arc-shaped rare earth magnet of maximum thickness 1 mm or less fabricated by compression molding from rare earth iron based melt-spun flakes and a binder. The magnet is provided with a certain specific portion at both ends in the circumferential direction, which has no back yoke when the magnet is press-fit in a soft-magnetic frame. The arc-shaped rare earth magnet fabricated by compression molding from a material containing more rare earth iron based melt-spun flakes exhibits simultaneous increase of both a remanence as a function of magnetizing field and a coercivity; and hence, exhibits a well-balanced demagnetization curve even in an unsaturated magnetized state.

Abstract: A bicycle hub dynamo comprises a hub spindle adapted to be mounted to a frame of the bicycle; a hub body disposed around the hub spindle, wherein the hub body has a pair of axially spaced hub flanges; a plurality of bearings disposed between the hub body and the hub spindle for rotatably supporting the hub body relative to the hub spindle; and a generator disposed between the hub body and the hub spindle, wherein the generator generates electricity in response to rotation of the hub body relative to the hub spindle. A freewheel is disposed on a first side of the hub body, wherein the freewheel is adapted to mount a plurality of sprockets.

Abstract: The invention relates to an electric motor, in particular for high speed operation, comprising a motor housing (4); inside the housing (4), a stator (2) having a core (8) and windings (9) toroidally wound on the core (8); and a rotor (1) inside the stator (2). The motor comprises an inductance controlling ring (3) in soft-magnetic material around the stator core (8), increasing for each phase the leakage inductance and forming for each phase an integrated filter inducatnce (L1, L2, L3) outside the core (8) of the stator (2) but still inside the motor housing (4).

Abstract: A recording disk drive motor is disclosed which is employed in a recording disk drive that retains a removable recording disk that has a diameter of 30 mm or less, as well as a method of manufacturing a stator core used in the same. The core back of the stator core in the motor has an arc shaped inner circumferential surface therein that is offset from the center thereof. The stator core is produced from a laminated body having a stator core, a chuck frame that is integral with and surrounds the stator core, and connector arms that connect the stator core and the chuck frame and integral therewith. After the windings are wound around the stator teeth, the stator core is cut from each connecting arm and the stator core is removed from the chuck frame.

Abstract: A universal motor having two carbon brushes (2a, 2b) and two series connected field coils (4a, 4b). The universal motor having an interference suppressing capacitor (5) with a first terminal (6a) connected directly to the first carbon brush (2a) and connected with a field coil (4a) in a conducting manner. The interference suppressing capacitor (5) also including a second terminal (6b) connected directly to the second carbon brush (2b) and connected to a power line (8b) in a conducting manner.

Abstract: An ironless AC linear motor for generating a thrust such that a carrier can move relative to a stator along a movement axis, includes parallel rows of permanent magnets arranged along the movement axis with a given magnet pitch to form a magnetic gap, a row of ironless coils having through holes and a manifold connected to the cooling tubes for distributing the coolant having a length equal to the magnet pitch in the direction of the movement axis.

Abstract: A dynamo-electric machine has a stator with a primary winding and a rotor with a field magnet and a shaft. the field magnet includes a first field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction and a second field magnet having diferent polarity magnetic poles sequentially arranged in a rotation direction. The machine further has a mechanism for shifting the first and the second field magnets in axial and rotation directions.

Abstract: A rotational position detecting sensor-equipped motor is capable of reducing a dimension thereof in an axial direction thereof. The motor includes a motor section including a motor stator and a motor rotor, a revolving shaft to which the motor rotor is coupled, a bearing structure for rotatably supporting the revolving shaft, and a rotational position detecting sensor for detecting a rotational position of the revolving shaft. The bearing structure, revolving shaft, motor section and rotational position detecting sensor are arranged so as to be concentric with each other in a radial direction of the revolving shaft.

Abstract: The invention is based on a control drive for operating drive components or adjusting components in motor vehicles. The control drive comprises an electric actuator (12) that acts on force-transmitting elements (19, 13; 40, 41). With these, the adjusting motion is transmitted to the drive or adjusting components to be adjusted. A throwout element (19) is provided that interrupts the transmission of force by the force-transmitting elements (10, 13; 40, 41) in the de-energized state (23, 55) of the electric actuator.