Abstract: A yoke of a voice coil motor includes an outer yoke as a magnet holding portion and an inner yoke as a coil insertion portion. A magnet is fixed to the surface of the outer yoke facing the inner yoke. The inner yoke is inserted into a coil. Openings are provided toward both end positions of the outer yoke from a middle position of movement positions of the coil. The openings are formed to pass through the outer yoke. The outer yoke can be made lighter while a necessary thrust is ensured.

Abstract: A yoke of a voice coil motor includes an outer yoke as a magnet holding portion and an inner yoke as a coil insertion portion. A magnet is fixed to the surface of the outer yoke facing the inner yoke. The inner yoke is inserted into a coil. The coil is formed in a trapezoidal shape where an outer wire length as a wire length of an outer long side is shorter than an inner wire length as a wire length of an inner long side. Since the outer long side is made shorter than the inner long side, an opposite thrust caused by current flowing in the outer long side can be reduced. Accordingly, a reduction in the thrust of the coil is suppressed by as much as the reduced opposite thrust.

Abstract: A process for manufacturing an abrasive wire formed by abrasive particles held on a central core by a binder comprises depositing abrasive particles on the central core, each particle comprising a magnetic material that has a relative permeability greater than 50 and that represents at least 1% of the volume of the abrasive particle, and depositing binder on the central core to keep the abrasive particles attached to it. The core has south poles and north poles alternating along either its circumference or its length.

Abstract: Eddy current non-destructive examination and evaluation of physical properties of a component, such as a generator retaining ring, after experiencing potentially degrading thermal exposure during any stage of manufacture, assembly and service use, is performed to determine whether it is acceptable for service use, requires further modification (e.g., additional heat treatment processing) or whether is permanently unsuitable for service. Eddy current test measurements are correlated with component temperature exposure (e.g., absolute temperature and/or cumulative time-temperature heat absorption) and cumulative alteration of the component physical properties, such as, among others, material yield strength (YS), toughness, and tensile ductility. Using the eddy current test measurements and reference data correlating electrical conductivity with ring material thermal exposure, the component's physical properties are evaluated to determine its serviceability.

Abstract: The permanent magnet type electrical rotating machine has an overhung rotor support structure in which a shaft of a rotor is supported at only one end side thereof by a bearing provided on one side of a casing of the electrical rotating machine. Another end side of the rotor shaft to be a bearing support-free side is capable of being joined to an end of a shaft of a prime mover via a flange formed at an end of the shaft. The rotor shaft is configured such that, upon a state of not being coupled to the prime mover shaft, the flange on the bearing support-free side is joined to an end face of the casing through a retaining member to be prevented from moving in any of an axial, radial and circumferential directions of the rotor shaft.

Abstract: A ferrofluid electric motor and methods are presented. A magnetic field is generated by an electromagnet, a flow of a ferrofluid is induced in response to the magnetic field, and a turbine is rotated by the flow of the ferrofluid.

Abstract: A marking (7) that indicates inherent information about a stator (2), is formed of recesses inscribed at a predetermined position on the outer circumferential surface of a laminated iron core (21) of the stator (2), by melting a magnetic thin plate with a laser beam. The marking (7) is formed of recesses in the outer circumferential surface of the laminated iron core (21), i.e., in the outer circumferential surface, at the laminated side of the magnetic thin plate, of the laminated iron core (21). Accordingly, friction or the like does not peel off the marking.

Abstract: A drum motor has a drum motor shell having a hollow space therein, a rotor and a stator, and bearing journals in the drum motor shell, the rotor and the stator being mechanically coupled to the drum motor shell and the bearing journals in such a way that relative rotation between the rotor and the stator causes relative rotation between the drum motor shell, and the bearing journals. The drum motor shell has at least one torque transfer section in which the outer surface of the drum motor shell is polygonal in cross-section. The sprocket has a polygonal, preferably hexagonal inner recess.

Abstract: Provided is a permanent magnet type electrical rotating machine which realizes a rotor retaining structure for securely preventing the rotor before being coupled to a prime mover from moving in any of not only the axial and radial but also rotational (circumferential) directions, even in a case where it is a large capacity (with a large magnetic attractive force) permanent magnet type electrical rotating machine having an overhung rotor support structure. The permanent magnet type electrical rotating machine (1) has an overhung rotor support structure in which a shaft (7) of a rotor (3) is supported at only one end side thereof by a bearing (9) provided on one side of a casing (2) of the electrical rotating machine. Another end side of the rotor shaft (7) to be a bearing support-free side is capable of being joined to an end of a shaft of a prime mover via a flange (10) formed at an end of the shaft.

Abstract: A dielectric insulation medium. The insulation medium is characterized in that it comprises a fluoroketone having from 4 to 12 carbon atoms.

Abstract: The invention concerns a direct drive or directly driven generator for a wind turbine comprising a stator and a rotor, wherein the stator comprises a stator ring comprising several ring-segment-shaped stator segments each having at least one stator element for the power generation and wherein the rotor comprises a rotor ring pivotable around a centre axis of the generator, the rotor ring comprises several ring-segment-shaped rotor segments each having at least one rotor element for the power generation. Furthermore the invention concerns a wind turbine comprising such a direct drive generator.

Abstract: A stator coil heating apparatus and a stator coil heating method that are capable of effectively preventing a core from thermal deformation particularly caused due to a magnetic flux generated by a coil head, without the problem of heating temperature variation, and also shortening a time for the process of heating a stator coil, are provided. A stator coil heating apparatus A to heat a stator coil L wound around a circular core F, comprises: induction heating coil heads 1 and 11 that heat the circular coil L by generating an inductive effect acting from outside in the thickness direction of the core F, against circular winding coil bases La and Lb that are sticking out of end faces Fa and Fb of the core F in the thickness direction thereof; and shields 2 and 12 that block a magnetic flux generated by the coil heads 1 and 11, out of the end faces Fa and Fb of the core F in the thickness direction thereof.

Abstract: The present invention generally relates to electric motor systems which minimize irradiation of harmful electromagnetic waves by various means. More particularly, the present invention relates to an electric motor system with one or more counter units which minimize the irradiation of such harmful waves by suppressing the harmful waves to their sources and/or by emitting counter electromagnetic waves capable of canceling a desired portion of the harmful waves. Such counter units may then be incorporated into various locations for opposing magnetic poles of basic rotor units and/or basic stator units of the system. The present invention also relates to various methods of minimizing irradiation of such harmful waves by various electric motor systems, various methods of suppressing the harmful waves toward their sources, and various methods of canceling such harmful waves by the counter waves.

Abstract: An electromagnetic rotor machine (10) of the hypocycloid type comprising a machine housing (12), an annular stator (30) in the machine housing an annular rotor (50) of a magnetic material, which is supported orbiting and rotationally around it's own axis in the machine housing, and at an interior side thereof adapted to operatively engage a drive element supported in the machine housing. The stator (30) comprises circumferentially arranged electromagnets which are magnetically separated from each other, each of said magnets comprising a core (34) and a coil (36) and being arranged in such a number that a plurality of magnets always is located at a side of the rotor (50).

Abstract: A generator system is disclosed. The generator system includes an input gear, a gear train coupled to the input gear, and a clutch associated with the input gear, wherein the clutch is exposed to the gear train.

Abstract: A flat spring of a voice coil motor includes a fixing frame having a first connector, and an elastic arm. The elastic arm includes a main body, and a first curve portion. The first curve portion is arranged on one terminal end of the main body and connects with the first connector of the fixing frame, or is arranged on one terminal end of the main body, which extends to the fixing frame.

Abstract: Rotary switches, and in particular riser-style commutators, are detailed together with featured strips from which they are made. Segments formed from the strips may include anchor notches and slots for receiving reinforcing rings. The structure of the strip additionally permits electrical isolation of adjacent riser segments to occur through its coining rather than through slotting.

Abstract: A trial (test) power toothbrush designed to emulate the performance of a corresponding commercial toothbrush, powered by a non-rechargeable battery. The power to drive the toothbrush is controlled by a control circuit which is responsive to the battery to maintain the drive power at approximately the level of the commercial unit and a short “trial use” period, i.e. one month/30 days, and then to terminate operation of the power toothbrush. The trial toothbrush may then be readily disposed of by the user, including the battery therein.

Abstract: Multi-phase motor, in particular, stepping motor or synchronized motor, with a rotor and stator parts that are essentially arranged concentrically with respect to the rotor and that, in each case, have a core and a coil, consisting of winding wire, and wound up upon the core, as well as a plug part with plug pins or a printed circuit board with strip conductors for electrical connection to a power supply source, where the winding wires essentially are connected directly to the plug pins or the strip conductors and where, between each coil and the plug part or the printed circuit board, there is provided an electrically insulating connecting piece which receives a section of the pertinent winding wire.

Abstract: The basic machine is a union of a D.C. generator and D.C. motor. One end of the shaft of the motor and the armuture of the generator is connected with insulated materials. Remaining parts of joint between the two machines are separated with an insulated material. For the starting of the machine a chargable battery is needed. As the shaft of the motor and armuture of the generator are connected, both are rotating simultaneously. Now the current from the generator is connecting to the motor through an Automatic voltage regulator. Now the connection from the battery is automaicaly switched off, and working with the current from the generator. Now this machine is a self power machine.

Abstract: In accordance with the teachings of the present invention, a remanufacturing kit that reduces the assembly functions and time required for remanufacturing a 50 DN generator is disclosed. The kit includes a box member, a pre-tested 50 DN generator subassembly, a rotor, an installation kit and an insert structure for securing the 50 DN generator subassembly, the rotor and the installation kit within the box member.

Abstract: A bolt intended to carry structural loads, such as but not limited to in pressure vessels or electrical machinery, that is electrically insulated from the clamped structure by a powder coating on the underside of the head and shank of the bolt.

Abstract: A power generating electromagnetic motor (2) which comprises a novel pulsed plasma commutator (22) in conjunction with a bipolar magnetic rotor (16) made of high BH.sub.max permanent magnets (14) affixed to a core element (18) disposed coaxially with drive coil (12) with an air gap there between and providing an adjacent receiving coil (10) for discrete, particle and wave recapture as well as by array (80). The commutator (22) propels the drive coil assembly (8) with a series of intermittent pulses as well as producing unique power outputs and discrete particles and waves in the resultant plasma, such as Electrum Validum or EV and furthermore is the unique presence of system negative entropy.

Abstract: A strain-matched hub for a motor/generator. The motor/generator preferably includes a cylindrical rotor surrounding a stator, and of larger diameter than a shaft. The hub, formed of a single material, connects the shaft to the rotor assembly, and contains a fastener circle whose expansion is matched to the rotor's expansion, in operation. Like the rotor, the hub's fastener circle expands uniformly around the fastener circle's circumference. Typically, a ring of keystone-shaped metal elements fits the hub to the rotor. The hub attaches to the keystone-shaped elements with a plurality of bolts or other fasteners, and the keystone-shaped elements fit to the rotor. The hub is formed of a single material and contains a plurality of spokes, each spoke positioned along a radius from the center of the hub to the center of a bolt. Each spoke is shaped to fit between two pairs of tangent-joined circles.

Abstract: A motor which has optimal performance along with minimal performance sensitivity with respect to manufacturing variations is described. Performance is defined by a critical-to-quality relationship. A process for designing such a robustly optimal, yet manufacturable, motor also is described.

Abstract: A fixture to evaluate stator production quality is placed about a stator core so as to introduce a test winding about the stator without need for hand winding. The fixture includes an inner annulus and an outer annulus each with axial conductors thereon, and top and bottom plates each with conductors thereon. The core is fitted between the inner and outer annuli, and between the top and bottom plates. The inner axial conductors and outer axial conductors are connected to one another at their lower ends through the bottom plate conductors and at their upper ends through the top plate conductors. Once testing is complete, the fixture is easily removed.

Abstract: A drive unit for a hoist, an elevator in particular, with a motor (6), a transmission (2), a breaking means (4) and a housing (8) is characterized in that said motor (6) and said breaking means are together arranged in said housing (8). Furthermore, at least one part of said transmission (2) can be arranged in said housing (8) as mounted or built-in transmission so that said housing (8) for the largest part also forms the transmission housing.

Abstract: The apparatus is used to clean a stator portion facing a rotor with removable peripheral poles in a turbine-alternator group. The apparatus has an elongated frame, adapted to replace one of the poles of the rotor by means of attachments devised for this purpose. An elongated brushing element extends generally in parallel with respect to the stator portion to be cleaned. Positioning devices are mounted between the frame and the brushing element to position the brushing element so that it comes in contact with the stator portion to be cleaned during the operation of the apparatus. A driving motor is coupled to the brushing element, and injectors are mounted onto the frame to inject a solvent under pressure on the stator portion to be cleaned when the apparatus is in operation. The method consists to turn slowly the rotor equipped with the apparatus to clean the stator portion.

Abstract: An electric motor (1) has a stator (3) and a rotor (5) having a rotor shaft (7), which rotor shaft is supported relative to the stator by means of ball-bearings (9). The ball-bearings are connected directly to suspension elements (11 ) for the suspension of the electric motor (1) relative to an external device. Resilient elements (13) are arranged between the suspension elements (11) and the stator (3) to suppress vibrations in the suspension elements (11). When the electric motor (1) is used in an apparatus less vibrations are transmitted to the frame of the apparatus, so that the apparatus itself also produces less vibrations and less noise.

Abstract: A photovoltaic cell-driven motor, more particularly, a special magnetic resonance enhanced, synchronously shaded motor driven by solar energy. A shading vane rotates on the motor shaft, and alternately shades the photovoltaic cells from the solar energy light rays. A stationary magnet is disposed just outside the electric coil on the motor shaft, and is synchronized with the shading vane to rotate the motor shaft in one direction. The motor converts direct current to alternating current electrical power, and is particularly useful in situations where constant sunlight is available, such as on a space station or a lunar station.

Abstract: Solar energy conversion apparatus including a rotatable converter with a core that is triangular in cross-section and tapers towards its ends. A multiplicity of hemispherical photovoltaic cells are supported on the sides of the core. Two metal foil layers insulated from each other are connected to different conductivity type portions of the cells, the outer foil layer being reflective. A glass shell covers the core and tapers toward each end. The shell has a dodecagonal cross-section with four facets overlying each side of the core, alternate facets being left uncovered and transparent and the other facets being silvered, thus forming reflective interior surfaces for reflection of sunlight entering the shell. A parabolic reflector directs sunlight on an end of the converter. A stationary housing concentric about the converter has a reflective inner surface in first and second end sections parallel to the taperings of the shell. The housing is divided into three sections each containing a field winding.

Abstract: An apparatus including a stationary field coil wound with alternating insulated copper wire and insulated steel wire; a rotatable armature comprising a plurality of lengthwise rows of magnets, each row being of a single polarity which is opposite from the polarity of the next adjacent rows; a rotatable sleeve positioned between the field coil and the armature and spaced apart from each, the sleeve comprising a plurality of lengthwise strips of material that attract magnetic flux, spaced apart from each other by a strip of magnetic material that is transparent to magnetic flux, and means to rotate the armature or the sleeve while the other remains stationary.

Abstract: A motor shaft is inserted through the center of a first and second coil spring. A first end of each spring is attached to the motor shaft and the second end is wound against its respective spring force and tied to the motor housing by a respective heat severable cord which is wound about a respective heater element. The first spring places a clockwise torque on the shaft and the second spring places a counterclockwise torque on the shaft. Each heater element may be selectively heated as by flow of electrical current, to heat a selected one element and heat sever its respective cord to release the torque on the second end of a respective one spring to rotate the shaft under the torque of the other spring.

Abstract: The wave powered buoy generator includes a hollow buoy which has inner and uter surfaces. The buoy is preferably spherical in shape. One or more windings are mounted to the buoy parallel to its surfaces with each winding having a pair of ends. A magnetized device which, is preferably a ball, is located within the buoy for rolling back and forth therein. A device is connected to the ends of the windings for rectifying current flow therefrom. With this arrangement the buoy can be moored in a body of water, and, when there is water motion, the flux lines of the magnetized roller device cut the one or more windings so as to cause electrical current flow to be provided through the rectifying device.

Abstract: Dynamoelectric stator assemblies and methods of fabricating stator assemblies with new and improved winding interconnection arrangements are disclosed. In one disclosed method, windings are generated and disposed in slots of a magnetic core with end turn portions thereof being disposed adjacent a core face. At a tap insulating station, selected winding tap wires are insulated and routed to a common connecting region. The core with winding turns therein is then moved to an end turn pressing station to compress and shape the winding end turns and to condition the end turns to subsequently receive and support a connection insulator. At a connection station, a tap support and aligning means is interfitted with the core for receiving the tap wires and lead wires therein.