Abstract: A magnetically journalled rotational arrangement comprises a bearing stator and a rotor, with the bearing stator being magnetically coupled to the rotor and producing a magnetic journalling of the rotor. The bearing stator is rotatably journalled. Furthermore, a rotary drive which is associated with the bearing stator is provided, with a rotation of the bearing stator producing a rotation of the rotor via the magnetic coupling of the stator to the rotor.

Abstract: A laminated rotor for an induction motor has a plurality of ferro-magnetic laminations mounted axially on a rotor shaft. Each of the plurality of laminations has a central aperture in the shape of a polygon with sides of equal length. The laminations are alternatingly rotated 180° from one another so that the straight sides of the polygon shaped apertures are misaligned. As a circular rotor shaft is press fit into a stack of laminations, the point of maximum interference occurs at the midpoints of the sides of the polygon (i.e., at the smallest radius of the central apertures of the laminations). Because the laminates are alternatingly rotated, the laminate material at the points of maximum interference yields relatively easily into the vertices (i.e., the greatest radius of the central aperture) of the polygonal central aperture of the next lamination as the shaft is inserted into the stack of laminations.

Abstract: A flywheel assembly for storing energy and rotatable in response to the rotation of a shaft includes a hub having a transition portion having a constant stress intermediate region operatively coupled to the shaft and an outer connecting portion forming a flexible cylinder, wherein the shaft and the flexible cylinder are substantially coaxial, and an outer cylinder wherein a majority of the mass of the flywheel assembly is concentrated. The flexible cylinder includes connecting pads disposed at opposing edges of the outer side of the flexible cylinder thereby permitting connection to the outer cylinder. The outer cylinder increases radially responsive to a corresponding increase in rotational speed of the flywheel assembly, while the diameter of the transition portion of the hub follows the radial increase of the outer cylinder.

Abstract: The invention relates to a permanent magnet-excited assembly of an electrical machine, as well as to a process for producing in particular a synchronous machine with a ferromagnetic body and permanent magnets arranged therein, for application as compact solutions for drives. According to the invention, punched single-component metal sheet disks or metal sheet strips (2) of the type known per se, with slots (3) and teeth (4) toward the back accommodate a arrangement of internal slots (5). The number and position of the internal slots (5) are adapted to the slots (3) for receiving the permanent magnets (7). A narrow removable bridge (9) is first arranged between the inner slots (5) and the slots (3). The pack of sheet metal elements is subsequently laminated and then solidified with non-ferromagnetic material (6). Following curing of the solidification, the slots (3) are milled down to the non-ferromagnetic material (6). Permanent magnets (7) are inserted in preferably semi-open slots (3) and solidified.

Abstract: The invention includes an apparatus to improve the efficiency of motors and generators by reducing counter electro motive force, including rotary and reciprocating piston embodiments constructed and arranged such that the motion is aided by the magnetic field rather than hindered.

Abstract: A dynamo-electric machine comprises a stator having a stator core formed with 9 slots and a first 3-phase stator coil and a second 3-phase stator coil inserted into the slots, and a rotor disposed inside the stator for forming 8 magnetic poles, the first 3-phase stator coil and the second 3-phase stator coil each comprising a U-phase coil portion, a V-phase coil portion, and a W-phase coil portion, each formed by winding wire onto teeth, wherein each of the phase coil portions of the first 3-phase stator coil and the phase coil portions of the second 3-phase stator coil corresponding to the phase coil portions are positioned so as to be offset from one another by a distance of one tooth in the circumferential direction.

Abstract: An improved motor housing with a slop structure at one side of the housing, the slot structure is arranged with ledges along its outer edges in which several threaded holes are provided for placing bolts through which clamping level of the outer body can be controlled so that a stator core can be inserted or removed easily and repeatedly, resulting in low cost, simplified assembling process, and facilitating modification and test of a motor in the development stage in research institutions.

Abstract: The present invention provides an insulating material for the enameled wire of a motor of a refrigeration compressor using hydrofluorocarbons as the refrigerant and, as the refrigerating machine oil, a synthetic lubricating oil having at least one ester bond in a molecule such as ester-modified polyoxyalkylene glycol type, ester-modified ether type or ester type, which insulating material contains a compound having at least one carbodiimide group.This insulating material for the enameled wire of a motor of a refrigeration compressor, which is free from the above-mentioned problems of the prior art, which can prevent the surface deterioration or peeling (blister or cracking) etc. seen in the conventional insulating material used for covering the enameled wire (e.g.

Abstract: A motor for providing reciprocating motion comprises a stator defining an arcuate pole face and a flat pole face and an armature defining a complimentary arcuate pole face and flat pole face, where the armature rotates about a pivot point in order to maintain a fixed air gap between the arcuate pole faces of the stator and the armature and a variable air gap between the flat pole faces of the stator and the armature.

Abstract: A three-layered metallic semiconductor strip in the form of a thermocouple with self-contained heating and cooling means when an electrical current is applied thereto to cause the controlled expansion and contraction of selected layers to move the strip to accomplish work.

Abstract: In a thin type flexible disk drive motor, in order to improve undesirable jittering of rotation, an inertia ring of larger diameter than that of the rotor frame is fixed immediately under the rotor. The inertia ring consists of a short cylinder part of the larger diameter to be fixed under the rotor frame and a flange part of the diameter not smaller than that of FG (frequency generation) magnet part. The disk drive motor also has a drive pin engaging assembly that allows a drive pin to be secured within a hub of the flexible disk while stabilizing the drive pin and after disk chucking.

Abstract: A commutator (10, 110, 210) with a reinforcing system comprising a stepped insulating ring (20, 120, 220) with a support piece (22, 122, 222) and a center or flange piece (24, 124, 224) and a metal ring (18,118, 218) which has a rectangular cross-section and is fitted into the stepped shape of the insulating ring such that part of the radial outer surface of the metal ring abuts the radial inner surface of the center or flange piece, and the end inner surface of the metal ring completely abuts the end outer surface of the support piece.

Abstract: A step motor is provided that makes it possible to lower the manufacturing cost and accurately control the movement of a holder. The step motor is provided with: a motor case (3); a hollow columnar stator (4) which is provided inside the motor case (3) and which generates a magnetic field; a rotor (42) which is rotatably provided in the stator (4) and which rotates in steps according to the generated magnetic field of the stator (4); an actuating shaft (43) which is fixed to the rotor (42) and which has a threaded portion (53) at one end thereof; a holder (45) which is threadably engaged with the threaded portion (53) and which is movable in the axial direction; and a guide (44) which is fixed to the motor case (3), which prevents the rotational motion of the holder (45), and which guides the holder (45) to move in the axial direction.

Abstract: A dynamoelectric machine such as a motor or generator has an end winding ring of ferromagnetic material in an area of the end winding portions of the stator and/or rotor winding. The end winding ring improves the overall power density of the motor by reducing the stator and/or rotor flux leakage (the magnetic flux that is produced by the windings that is not utilized to produce torque in the rotor). By operatively coupling end winding portions of the stator winding with ferromagnetic material, the end winding portion is employed to produce torque in the rotor. The end winding ring may be a ring of ferromagnetic material attached to the stator core or the frame or the rotor, or may be a coating of ferromagnetic material applied indirectly to the end winding portions. The end winding ring also may support the end winding portions to reduce movement thereof.

Abstract: An energy storage and conversion apparatus (1) comprising a containment (5) defining a vacuum chamber (7), a substantially vertical shaft within the vacuum chamber (7), a stator (11) on the shaft (9), and a cylindrical rotor (13) which, in use, is driven by the stator (11) to store energy as kinetic energy of the rotor (13) and acts with the stator (11) as a generator to release energy, wherein the rotor (13) is supported by the shaft (9) via an end cap (29), positioned at the upper end of the cylindrical rotor (13), which engages the shaft (9). The rotor (13) is suspended from a pin bearing (31) which is attached to an end cap (29). The pin bearing (31) sits in a bearing cup (37) mounted in a damper (39) at the end of the shaft (9). A magnet bearing (43) is provided at the lower end of the rotor (13) to assist in positioning the rotor (13) relative to the stator (11).

Abstract: A new class of actuators and mechanisms use opposing repulsive magnetic forces. The repulsive forces are typically generated between a stationary magnet and a moving magnet, where the moving magnet is coupled to the mechanism output member. The mechanisms are generally configured such that the repulsive force from one electromagnet is opposed by a repulsive force from another electromagnet, where the opposing forces are simultaneously applied to the mechanism's output member. This configuration is similar in certain aspects to the way biological flexor and extensor muscles are configured in a musculoskeletal system. The opposing configuration allows for open loop control of position and stiffness. The actuator mechanism may have both rotary and linear motion output, and may have either a single degree of freedom or multiple degrees of freedom. Permanent magnets can be used to create a baseline repulsive force without electric power, and electromagnets can modulate the repulsive force magnitude.

Abstract: A direct current electromotor, having in particular small dimensions, comprising a collector plate arranged on a shaft, a plurality of collector wires held by the collector plate plate and accumulated to a collector sleeve, and comprising a capacitor disk also arranged in the area of the collector plate, the contact pads of the capacitor disk are each in electrical connection to at least one associated collector wire in a respective coordination. A direct current motor of this kind shall have a more simple structure so that very small diameters can also be produced. This is achieved in that the capacitor disk with its contact pads is directly set onto the collector wires and is connected therewith.

Abstract: A stepping motor is provided with a plate spring for pressing a housing and a rotor against each other. One of the housing and the rotor is provided with a projection. Variations in position, which is inherent in position control by a related art stepping motor, due to lack of a retaining force subsequent to an initial position setting or due to variations in rotating speed of the motor, are eliminated. Thus the motor is suitably used for controlling of the position of, for example, an HID lamp unit.

Abstract: An assembly is introduced which consists of an electric motor (1), an intermediate housing (2) and a control unit (3) and which is adapted for easy mounting. Such assemblies are often used in brake systems where the intermediate housing (2) receives a pump and valves. With such an assembly it is possible to control the braking pressure of the connected wheel brakes independently by predetermining the brake pedal force in accordance with suitable criteria. This assembly enables a compact structure if the motor (1) is arranged on the one side of the intermediate housing (2) and the electronic control unit (3) is arranged on the other side. Electric connection between the control unit (3) and the motor (1) is effected by a line (20) passed through channels (21,22) in respectively the intermediate housing (2) and the control unit housing (4). The cross-section of the channels (21,22) is but slightly larger than the outside diameter of the line (20).

Abstract: A flywheel safety support system isolates the flywheel and its motor-generator from the driving environment of an electrically powered motor vehicle. A suitable liquid, placed between the outer and vacuum housings of the flywheel assembly, provides buoyancy and damping to the vacuum housing, cooling of the motor-generator, and serves as one of the barriers to rotor energy and angular momentum transfer in the event of an accident or failure. During normal operation, a shearable mechanical gimbal system keeps the vacuum housing centered in the outer housing, reacts the spin moments generated by the motor-generator, and provides a path for the electrical leads into the vacuum housing. In the event of bearing seizure or rotor failure, the mechanical gimbal will shear and allow the vacuum housing to gradually spin down against the fluid. A fiber barrier provides an additional layer of protection to passengers.