Abstract: A structure for fitting a generator stator to an engine is provided which allows generator stators having different shapes to be fitted selectively to a common engine main body. In order to selectively fit a first or second generator stator having different shapes from each other to the outside wall of an engine main body, a plurality of first fitting bosses for bolting the first generator stator and a plurality of second fitting bosses for bolting the second generator stator are provided at different positions on the outside wall.

Abstract: Method and device (4) for balancing rotors (1), in particular for electric motors, by the addition of material, in which the actual balancing step is carried out by inserting, inside one or more recesses (2) formed in the rotor (1) and designed to seat the rotor winding (3), one or more self-locking balancing devices (4) made of non-ferromagnetic material and having a mass which can be determined beforehand in terms of both its amount and its distribution.

Abstract: The invention relates to an alternator having a stator core with a rotor located in the opening of the stator core for rotation therein. The rotor coil has 455 turns of 17.5 gauge wire with a resistance of about 1.9 ohms with rotor pole members having an outside diameter of 4.76 inches. The radial distance between the outside diameter of the rotor pole members and the inside diameter of the stator core is about 0.002-0.003 of an inch.

Abstract: A full levitation magnetic bearing system with passive magnetic bearings that affords increased radial stiffness and load capacity includes two passive permanent magnet magnetic bearings, one each located on each side of the center of mass of the rotor to be levitated. An active axial magnetic bearing provides control for stable levitation. The magnetic bearing system provides increased radial stiffness and load capacity by the reduction or elimination of the unstable tilting moments generated by the individual passive permanent magnet magnetic bearings. The bearings are constructed so that they are concave toward the center of the rotor, with a radius approximately equal to the distance between the magnetic bearing and the central point about which tilt rotation would tend to occur. The individual magnetic air gaps are preferably constructed to be perpendicular to the axis of rotation.

Abstract: A miniature motor includes: a plurality of magnets serving as stator poles and attached to an inner surface of a motor casing having a closed-bottomed cylindrical shape; a salient-pole rotor having a core mounted on a rotor shaft and windings placed on the core; and a commutator mounted on the rotor shaft. The core includes a center portion having a hole formed therein at the center for engagement with the rotor shaft, a plurality of leg portions extending integrally and radially from the center portion in equal number with the salient poles, and a plurality of wing portions, each extending integrally and symmetrically from an end of each of the leg portions. The core includes core laminations blanked from sheet steel and assembled together and is formed through deformation of the entire wing portions such that the radius of a circumcircle of the core coincides with a designed final radius of curvature of outer circumferential surfaces of the salient poles of the rotor.

Abstract: An improved armature winding arrangement for a rotating electrical machine such as a specifically illustrated DC motor for driving a vehicle wheel. The assembly is such that the armature core can be formed from two laminated pieces that are rigidly connected to each other and held against axial movement. This eliminates the need for bonding adhesive. In addition, an improved bobbin arrangement is employed for both permitting attachment of a wiring plate directly to the core but also for retaining the ends of the individual windings to prevent them from becoming loose either during assembly or in operation.

Abstract: Electromagnets are placed to face each other in a yoke. Both ends of pole cores of the electromagnets are extended and bent. Permanent magnets are sandwiched between the extended parts of the pole cores. The north pole and south pole of the permanent magnet are in abutment with the north pole core and south pole core, respectively. When rotor windings and stator windings are not energized, a flux of the permanent magnets forms a closed magnetic circuit within the stator. When the rotor windings and the stator windings are energized, magnetic force lines of the electromagnets and permanent magnets flow through an armature core in the same direction via teeth and fluxes are increased.

Abstract: An electromotive machine having a stator element and a rotor element, the stator element including at least one set of four 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 about four to six. Thc electromagnetic members are energized in a four phase push-pull fashion to create high torque and smooth operation.

Abstract: A wet-running direct-current motor for a fuel pump having a commutator (2) formed from carbon lamellas (5), and carbon brushes (3) having brush running faces (6) which are fluted in the direction of rotation. The fluting is obtained by curved, parallel ribs of triangular cross-sections whose apexes define the brush running face. The curved ribs have radii offset from the curvature of the commutator surface, the offset being achieved by offset of the center of the radius of each rib in a direction counter to the direction of relative rotation of the commutator and brushes. The motor is rendered usable for fuel pumps of diesel engines.

Abstract: A rotor 33, 133 for use in an electrical machine 100 having permanent magnets 34, 134 included therein, each permanent magnet 34, 134 between an adjacent pair of poles 32, 132, wherein each adjacent pole 32, 132 has an opposite polarity. Each permanent magnet 34, 134 has a magnetization polarity on its radially-outward surface 38, 138, and each adjacent permanent magnet 34, 134 has the opposite polarity on its radially-outward surface 38, 138. In addition, each pair of permanent magnets 34, 134 have the same magnetic polarity on their adjacently facing surfaces. This arrangement of permanent magnets 34, 134 may be used on electrical machines 100 having either a Lundell-type rotor 33 or salient pole rotor 133. The arrangement of permanent magnets 34, 134 increases the output power and efficiency of the electrical machine 100 while decreasing magnetic noise.

Abstract: A throttle valve assembly having a direct current torque motor assembled and calibrated as a subassembly or unit and installed on the throttle body and the throttle plate subsequently installed. The rotor is a disc defining magnetic poles and an axial air gap with the stators which are assembled in a cup-shaped housing. The housing and stators are assembled over the rotor shaft and rotor and attached to a cover plate to form a motor subassembly. The shaft of the motor subassembly is inserted in bearings in the throttle body and the subassembly secured to the throttle body by fasteners through the cover plate. The throttle plate is then installed in a slot in the motor shaft through the air passage in the throttle body.

Abstract: In an electric motor intended to be fixed to a printed circuit board, provision is made for it to have at least one expanding dowel (4), for it to be possible for the motor (1) to be fixed to a printed circuit board (6, 32) by the expanding dowel or dowels (4) being expanded, and by it being possible for the expanding dowel or dowels (4) to be secured at least by a pin (7).

Abstract: In a preferred embodiment, a linear/rotary motor, including: first and second stator structures, having magnetically coupled thereto, respectively, first and second rotors; a first, externally threaded shaft fixedly attached to the first rotor and extending axially therefrom, such that rotation of the first rotor causes rotation of the first, externally threaded shaft; a second shaft, having a splined external surface, extending through a complementarily shaped opening defined through the second rotor, and axially movable with respect thereto, such that rotation of the second rotor causes rotation of the second shaft; and the second shaft including threaded apparatus cooperatively engaging the first, externally threaded shaft, such that rotation of the first, threaded shaft can cause linear motion of the second, cylindrical shaft. The motor can be operated to provide rotary, linear, or simultaneous rotary and linear motion of the second shaft.

Abstract: A brushless motor includes a motor holder and a case connected thereto. A ventilation chamber is defined between the motor holder and the case. The ventilation chamber includes an air inlet portion, an air outlet portion and water draining portions. The air inlet portion is in communication with the atmosphere. The air outlet portion is in communication with a stator. The water draining portions drain water introduced into the ventilation chamber out of the motor. The motor provides a flow of cooling air passing through the ventilation chamber toward the stator for cooling heat generated during rotation of a rotor. The motor holder and the case have guide ribs arranged in the ventilation chamber to define an air passage for guiding the cooling air from the air inlet portion to the air outlet portion. The water draining portions are located outside of the air passage.

Abstract: An actuating drive with an electric motor that has a metallic electric motor housing, a shaft, an armature, collector, brushes, and a brush holder plate, and control electronics. Electronic and electric components are connected to a printed circuit board and the printed circuit board protrudes at right angles to the shaft and into a cross section of the electric motor housing. Outside the electric motor housing, the electronic and electric components are protected by a control electronics housing. Radio interference suppression means, for example, can be disposed inside the actuating drive. The system includes a printed circuit board with a strip conductor and a contact spring that leads from the strip conductor and this contact spring protrudes into the electric motor housing, wherein a resilient free end of the spring rests against the electric motor housing producing an electrical contact.

Abstract: A method and an arrangement for adjusting the disc brake of a squirrel cage motor, the squirrel cage motor having a stator, a rotor arranged on a shaft of the motor and having a deflector for deflecting part of the magnetic field of the stator to a stray flux of the magnetic field of the rotor in the direction of the shaft, the motor further having an armature arranged on the shaft, a flexible element arranged between the deflector and the armature for pushing the armature away from the deflector, at least one brake disc supported to a motor frame via at least one slot, at least one trigger gear arranged on the shaft and a shaft bearing.

Abstract: A compact flat type vibrator motor is provided in which movement of the center is secured in the commutator itself, an additional eccentric member does not need to be provided, and the number of parts are reduced, so that mass production is possible. The commutator pieces are located in a commutator base member including a printed wiring board having a portion to which a high density resin of a specific gravity of 3 or more is added. A shaft receiving portion is centrally located in the commutator base member. The high density resin portion is eccentric so that an eccentric rotor is formed.

Abstract: An alternator includes a rotor for forming north-seeking (N) and south-seeking (S) poles about a rotational circumference, a stator having a stator core disposed facing the rotor and a polyphase stator winding installed in the stator core, and a bracket supporting the rotor and the stator, wherein the stator core includes a laminated iron core formed with a number of slots extending axially at a predetermined pitch in a circumferential direction, the polyphase stator winding includes a number of winding sub-portions in each which a long strand of wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within the slots at intervals of a predetermined number of slots, the strand of wire folding back outside the slots at axial end surfaces of the stator core to form turn portions, and the turn portions align in a circumferential direction to constitute coil end groups.

Abstract: A generator rotor lead path configuration includes a plurality of electrically conductive components attached to each other. These components may include an axial lead, a flexible connector, an intermediary, a radial lead, and/or a J-strap. The improved lead path inhibits, if not prevents, lead path failure. A method of assembling or fitting the lead path into a generator is also provided, as well as a method of replacing or retrofitting a lead path that is susceptible to failure with the improved lead path configuration. Assistance in determining causes of lead path failure and ways to overcome lead path failure are also provided.

Abstract: A rotary direct current electric motor in which rotor and stator members are each configured as annular rings, concentric with respect to each other, about an axis of rotation. Either of the rotor or stator members is formed of groups of electromagnet pole pairs, the groups substantially equidistantly distributed along the angular extent of the annular ring, each of the groups comprising magnetic material magnetically isolated and separated from the other groups. The other member includes a plurality of permanent magnet poles substantially equidistantly distributed with alternating magnetic polarity along the angular extent of the radial air gap formed between the members, the permanent magnet poles having a discontinuous magnetic return path, thereby dividing the member into magnetically isolated groups of permanent magnet poles.