Abstract: In a preferred embodiment, a linear/rotary electromagnetic device, including: a housing (20); first and second stators (22 and 40) disposed in the housing, first and second rotors (24/26 and 42/44) disposed in the housing and magnetically interacting, respectively, with the first and second stators; the first stator and the first rotor comprising a rotary motor; the second stator and the second rotor comprising an electromagnetic brake; a shaft (28) extending through a portion of the housing and axially through the first and second rotors, the shaft having a threaded portion (50) extending through a complementary threaded portion (44) of one of the first and second rotors; whereby; when the electromagnetic brake is locked and the rotary motor is rotated in a first direction, the shaft will move axially in a first direction; when the electromagnetic brake is locked and the rotary motor is rotated in the second direction, the shaft will move axially in a second direction; and when the electromagnetic brake is r

Abstract: A brushless synchronous electrical machine includes a rotor rotating about a rotor axis, and a stator that includes at least one set of magnetically active stator cores projecting radially outward from the axis, and that also includes magnetically interactive crossbars on the radially outward ends of the stator cores. The rotor includes one or more magnetically active projections that sweep past the radially inward facing surfaces of the crossbars as the rotor rotates. Preferably, there are two sets of stator cores, displaced axially and staggered azimuthally with respect to each other. Stator windings are wound toroidally about the stator cores. The rotor is provided with a magnetic field, preferably by electrical current in one or more axial windings wound toroidally with respect to the rotor axis.

Abstract: A set of independently usable linear drive, which include at least one fluid power and at least one electrical linear drive. The principal housing bodies of the linear drive are respectively provided with an elongated receiving space, in which fluid power drive means or electrical drive means are located dependent of the type of drive. As regards their outer shape the principal housing bodies at least essentially the same and their receiving spaces possesses the same cross sectional form. Accordingly on the basis of a large number of the identical component different types of linear drive may be produced.

Abstract: A compact bearingless machine drive system includes: a first rotor segment; a first stator segment with the first stator segment including a drive winding and a first control winding; a second rotor segment; a second stator segment with the second stator segment including the drive winding and a second control winding; and a rotor shaft. The first and second rotor segments are attached to the rotor shaft. A common end ring is coupled between the first and second rotor segments. A drive inverter controls the drive winding to generate torque, and first and second control inverters control the first and second control windings to generate radial forces on the first and second rotor segments.

Abstract: A three-phase stepping motor comprising: a rotation shaft rotatably supported by a pair of bearings provided in predetermined places of a housing so as to be in opposition to each other; a permanent-magnet rotor formed in a cylindrical shape so as to have south (S) and north (N) poles magnetized alternately in the direction of rotation on an outer circumferential portion of the rotor, or an induced magnetization rotor having S and N poles disposed alternately in the direction of rotation which are formed in a manner so that permanent magnets with the same polarity are fitted or formed so as to be identical in polarity at their surfaces in grooves formed parallelly to each other at a regular pitch in a surface of a magnetic body formed to be cylindrical in parallel to the rotation shaft and the cylindrical magnetic body is subjected to induced magnetization to form the S and N poles alternately in the surface of the cylindrical magnetic body; and a stator disposed so as to be in opposition to a surface of one

Abstract: An electromagnetic drive for a focal-plane shutter of a camera having two light-excluding shutter curtains, each of the two shutter curtains being having its own electric drive motor, which is a linear motor constructed from permanent magnets and electromagnetic coils. The linear motor has at least two mutually aligned permanent magnets. The opposite pole faces of the magnets have the same polarity. A soft-magnetic disk is disposed between the permanent magnets. A soft-iron casing encloses the magnets and the soft-magnetic disk with an annular gap therebetween. A coil former is displaceably mounted in the annular gap such that it can exert an operating stroke between two stops. The coil former has a drive element for transferring the axial displacement of the coil former to the assigned shutter curtain.

Abstract: Electric rotating machines and/or assembly which, dependent upon the specific embodiments utilized may be in the form of a motor, generator or combination of both wherein a common stator assembly is disposed in an operative position relative to at least one but in some embodiments a plurality of rotor assemblies preferably having annular configuration and further being defined by a central opening in which the stator assembly is mounted. The supporting structure has the stator assembly fixedly attached thereto as well as the one or more rotor assemblies moveably mounted thereon in rotational travel relative to the stator assembly and, dependent upon the embodiments, relative to one another when a plurality of rotor assemblies are utilized. One feature of the overall structure is an increase in versatility and applicability for specific practical application by eliminating the use, need or requirement of a central support shaft commonly found in prior motors/generators.

Abstract: A multi-phase PM-type stepping motor comprising: a rotor constituted by a cylindrical permanent magnet with N poles and S poles magnetized alternately on an outer circumferential surface of the rotor; stator cores having teeth arranged in opposition to the N poles or the S poles on the outer circumferential surface of the rotor through a predetermined air gap; and excitation coils wound in the stator cores and for magnetizing the stator cores to thereby rotate the rotor; wherein, when the number of the stator cores is represented by n (n is an odd number not smaller than 5), and the magnetization pitch angle of the permanent magnet is represented by P, the teeth of the stator cores are shifted from each other by an angle of 2P/n.

Abstract: An in-line generator fits between the engine and transmission of a conventional motor vehicle. The in-line generator comprises an externally cooled housing having a first end that is mounted to the engine in place of the transmission. The transmission is secured to the housing second end in the same manner as the transmission would normally be secured to the engine. One end of a rotor is fastened to the engine crankshaft. A coupling is attached to the rotor second end and to the transmission input shaft. When the engine is operated, the rotor rotates to cooperate with a stator in the housing to produce electric power. The rotor also transmits torque to the transmission to propel the motor vehicle. The coupling includes a flex plate that accommodates thermal expansion of the rotor and other generator parts. The in-line generator can be removed from the vehicle and the transmission resecured to the engine as in a normal vehicle should the in-line generator require repair.

Abstract: A ram air turbine includes a reaction turbine and an electrical generator that is driven by shaft power of the reaction turbine. A scoop directs a flow of ram air to an inlet of the reaction turbine and creates a pressure head for the reaction turbine. The reaction turbine and the scoop are contained entirely within a pod. The ram air turbine further includes a turbocompressor, including a turbine stage and a compressor stage, which provides a stream of cooled air to equipment inside the pod. The turbocompressor also reacts loads shed by the electrical generator.

Abstract: An inductor-alternator provides highly efficient conversion between mechanical and electrical energy. The inductor-alternator produces increased output by providing armature coils in a single air gap formed between two halves of a toothed rotor. In preferred embodiments, field coils of a magnetic circuit are energized with DC drive current that creates homopolar flux within the rotating rotor. Airgap armature coils are mounted with the field coils to form a stationary assembly that is placed within the single air gap in the rotor so that the changing flux density (due to the rotating teeth) induces an output voltage in the armature coils. The rotor and stationary assembly are mounted in a housing by bolts that may also be used as terminals for the armature coils to reduce assembly complexity and production cost. The combined assembly provides high energy and power density because tip speed of the rotor is maximized and the use of air gaps is minimized.

Abstract: This invention provides a cogeneration system formed compactly and provided with a plurality of generators, wherein a plurality of miniaturized generators are coupled to a flywheel provided in an engine. In this cogeneration system, a toothed endless belt is meshed with a toothed portion formed on an outer circumference of the flywheel provided in an engine, and electric power is generated by driving a plurality of generators by the toothed endless belt via speedup gears. The electric power generated by the generators is synthesized and then transformed by a transformer, and the resultant electric power is consumed by a load via a rectifying diode and an inverter.

Abstract: A drive assembly for driving an adjustable unit in a motor vehicle includes a motor/transmission and an associated control unit. The motor/transmission is suitable for adjusting an adjustable part in a motor vehicle for normal applications. The transmission is driven by the motor to adjust the adjustable part. The motor and the transmission are separated by an interface region. The motor includes a magnetic field generator for generating an alternating magnetic field as the motor drives the transmission. The control unit can be readily connected to the motor/transmission for controlling the adjustment of the adjustable part for more advanced applications. To be readily connected to the motor/transmission, the control unit includes a profiled projection having a hollow chamber. A magnetic sensor is positioned inside the hollow chamber.

Abstract: An oil-filled protector for use with an electric submergible motor, comprises a housing connectable to an electric submergible motor, and an oil-filled expandable chamber within the housing and in fluidic communication with the electric submergible motor. The expandable chamber is formed from an elastomeric material, and includes materials for preventing deleterious fluids, such as H2S, CO2 and CH4, from passing through the chamber and into the motor. Such materials include elastomeric materials with one or more metallic coatings or bonded layers. The chamber can include separate annular partitions to define an inner oil-filled region and an outer region filled with a barrier fluid that substantially inhibits the passage of the deleterious fluids.

Abstract: A permanent magnet generator is described. The generator includes a shaft which defines a longitudinal axis. A rotatable magnetic field assembly is mounted on the shaft and adapted for rotation about the shaft. The magnetic field assembly includes a plurality of axially magnetized magnets which are retained in a cavity about the shaft for generating an axial magnetic flux. A plurality of vanes are mounted on the magnetic field assembly housing for rotating the magnetic field assembly about the shaft when a fluid flows past the vanes. A stationary armature assembly is also located around the shaft in a position axially spaced from the magnetic field assembly. The armature assembly generates AC power when the magnetic field assembly is rotated. The stationary armature assembly includes an armature housing. An axial bore is formed through the armature housing for receiving the shaft. The armature housing defines a cavity about the axial bore in which a plurality of laminated bars are retained.

Abstract: An inductor-alternator provides highly efficient conversion between mechanical and electrical energy. The inductor-alternator produces increased output by providing armature coils in a single air gap formed between two halves of a toothed rotor. In preferred embodiments, field coils of a magnetic circuit are energized with DC drive current that creates homopolar flux within the rotating rotor. Airgap armature coils are mounted with the field coils to form a stationary assembly that is placed within the single air gap in the rotor so that the changing flux density (due to the rotating teeth) induces an output voltage in the armature coils. The rotor and stationary assembly are mounted in a housing by bolts that may also be used as terminals for the armature coils to reduce assembly complexity and production cost. The combined assembly provides high energy and power density because tip speed of the rotor is maximized and the use of air gaps is minimized.

Abstract: A magnetically operating device comprises a driven magnet having magnetically opposite poles which are separated, a driver magnet having magnetically opposite poles, and the magnets are mounted for relative movement to maintain one of the driver magnet's poles substantially equidistant from the poles of the driven magnets as the driven magnet moves relative to the driver magnet. A first rotor may mount the driven magnet or magnets for rotation about a first axis, and a second rotor may mount the driver magnet or magnets for rotation about a second axis, and such axes are typically non intersecting and skewed, the rotors being intercoupled. A source of torque such as a motor may be coupled to the second rotor to effect torque input to the second rotor.

Abstract: A multi-functional electronic actuator for actuating multiple independent systems on an automotive vehicle includes a magnet assembly, a rotor mounted within the magnet assembly having an armature and a shaft that rotates when the armature is energized, a device for translating the rotor with respect to the magnet assembly, and devices for actuating a first independent system on the automotive vehicle utilizing the rotational motion of the shaft and for actuating a second independent system on the automotive vehicle utilizing the translation of the rotor shaft with respect to the magnet assembly. Two methods for translating the rotor with respect to the magnet assembly are described as well as various linkages that may be used to actuate the independent systems on the automotive vehicle.

Abstract: A superconducting rotating machine includes a direct current field excitation source and an alternating current armature winding mounted on a stationary support member, at least one of which includes a superconducting material, a core member formed of a magnetic permeable material and rotatable around the static support member, and a refrigerator unit which cryogenically cools at least one of the field excitation source and the armature winding. The superconducting rotating machine may have a construction for providing polyphase (e.g., three-phase) power.

Abstract: A limousine type vehicle includes a standard electrical system, a coach section with an auxiliary electrical system, and an electric power generation system which has first and second batteries isolated from each other during normal operation of the vehicle's engine. The first battery is electrically connected to the engine to supply electric power for the operation of the engine and the standard electrical system, and the second battery is electrically connected to the auxiliary electrical system to supply electric power for the operation of said auxiliary electrical system. A first alternator is electrically connected to the first battery to recharge said first battery during operation of the engine, and a second alternator is electrically connected to the second battery to recharge said second battery during operation of the engine.

Abstract: A section of the rotor of an electric motor includes a Neodymium plastic bonded magnetic material annulus having a plurality of permanent magnets having magnetic poles alternately disposed thereon and pressed onto the periphery of a plastic disc. The annulus is magnetized to provide thirty six evenly spaced similar permanent magnets with their north and south poles alternately disposed along the periphery of the rotor section. Five rotor sections are provided to provide the rotor. Each rotor section is coaxially connected to the shaft of the electric motor. A stator of the electric motor preferably has five stator sections with each having thirty two stator coils that each have one end proximal to the periphery of the annulus. Each stator of the electric motor is disposed about a corresponding rotor section and separated therefrom by an air gap.

Abstract: A rotor for use in an electric machine, such as an electric motor having a pair of stators and a rotor, which includes a central sheet, typically connected to a rotating shaft, having a pair of opposing faces, typically parallel, and one or more pairs of permanent magnets. The magnets of each pair of magnets are connected to the central sheet directly or nearly opposite from each other on opposing faces of the central sheet. The pair of magnets are mounted so that their polar orientation is co-directional.

Abstract: A compact bearingless machine drive system includes: a first rotor segment; a first stator segment with the first stator segment including a drive winding and a first control winding; a second rotor segment; a second stator segment with the second stator segment including the drive winding and a second control winding; and a rotor shaft. The first and second rotor segments are attached to the rotor shaft. A common end ring is coupled between the first and second rotor segments. A drive inverter controls the drive winding to generate torque, and first and second control inverters control the first and second control windings to generate radial forces on the first and second rotor segments.

Abstract: A magnetically driven apparatus useful, for instance, for conveying webs, utilizes magnetically coupled first and second rotatable elements and means for rotating one of the rotatable elements which causes the simultaneous synchronous rotation of the other rotatable element. Both first and second rotatable elements include a magnetic core, and a media bearing surface comprising a mixture of a polymeric matrix and a hard, inorganic particulate material wear and abrasion resistant layer surrounding the magnetic core. The means for rotating one of the rotatable elements includes a ferromagnetic stator member integrally associated with one of said first and second rotatable elements. The ferromagnetic stator member has a plurality of spatially separated pole teeth, wherein each of the pole teeth has an operably connected coil arranged for producing rotation of one of said first and second rotatable elements once the coil is energized.

Abstract: The present invention is a new type of an electromechanical actuator that combines two rotary outputs from a solitary electrical input into a single molded housing. The actuator comprises an input assembly responsive to an external electrical control source. Preferably, the control source provides a control signal for each valve door to be controlled. The actuator also comprises a first geartrain assembly responsive to the input control assembly and a second geartrain assembly responsive to the input control assembly. The first geartrain assembly includes a first motor responsive to the input control assembly. A first output gear is operably connected to the first motor and a first rotatable output coupler is connected to the first output gear. The second geartrain assembly includes a second motor responsive to the input control assembly. A second output gear is connected to the second motor and a second rotatable output coupler is connected to the second output gear.

Abstract: The present invention includes a basic module for a discoidal machine. The module includes at least one stator subassembly and a rotor subassembly. A housing member is connected to the stator subassembly. The stator subassembly and the rotor subassembly are coaxially arranged. A discoidal machine for such modules is also disclosed.

Abstract: A bearing system for positioning and supporting a rotor having a vertical shaft (20) coincident with a main rotation axis included in a flywheel (10) used for energy storage and high surge power in vehicular applications. The bearing system includes upper and lower radial force generators (110, 210) containing only electromagnets, and upper and lower axial force generators (120, 220) including an electromagnet and a permanent magnet. According to one aspect of the bearing system, each of the bearings includes control circuitry having simple and complex lead networks so as to permit the force generators to rapidly respond to vehicular transients while maintaining a preferred bearing stiffness. The bearing system also includes upper and lower touchdown ball bearings (130, 230) which are engaged only when the radial force generators are unable to maintain the rotor in a predetermined cylindrical volume within the flywheel (10).

Abstract: Three magnetically cooperating parts are movable relative to one another, one part being provided for connection to a drive shaft, one part being provided for connection to an output shaft, and one part being provided as a stationary part. A first part surrounds a second part, these parts having permanent magnets which alternately exhibit north poles and south poles along the circumference. The third part comprises a yoke surrounding the first part, which yoke serves as a magnetic return element, and which has magnetically conductive teeth at the inner side of the yoke.

Abstract: The Invention comprises a versatile AC dynamo-electric machine comprising isolated dual stators, each both concentrated windings energizable with single-phase AC, and main windings and a single high inertia sleeve and drive place connected to a rotor shaft. The sleeve contains independent electrical rotors, one for each stator. Each rotor has an innermost layer of magnetizable permanent magnetic material in which the concentrated coils in the stator produce a desired pattern of magnetic poles reacting with the rotating field of the main windings. The machine can function as a synchronous AC motor, or a constant frequency output dual AC generator or as an AC motor-generator with long ride-through time. A UPS system comprises the machine in the motor-generator mode, with clutch means to connect an engine to the rotor shaft to start the engine.

Abstract: A permanent magnet rotor type electric motor is formed of a stator core generating a rotation magnetic field, and a rotor core rotationally situated inside the stator core. The rotor core includes a first core member for generating a magnet torque, permanent magnets embedded in the first core member for forming magnetic poles, and a second core member for generating a reluctance torque without having a permanent magnet therein. The second core member is coaxially united with the first core member so that the rotor core is divided into the first core member for generating the magnet torque and the second core member for generating the reluctance torque.

Abstract: An autonomous generation brake having a dynamo, following rotation of a first rotor of an annular magnet in the core area an even number of armature coil with alternating polarities inside the first stator on the outer periphery are induced to produce an alternate current potential to be rectified at a rectifier wherefrom rated direct current is delivered to stimulate respective magnetic coils on the second stator of a braking device enclosing the dynamo; the second stator clamping internally a second rotor of a metal checked heat diffusion ring so that once the second rotor turns in rotation and respective magnetic coil on the second stator are stimulated, the interrelated movement occasioned thereby will induce a vortex upon the second rotor, meantime produce a braking torque sufficient to rapid diffusion of magnetically induced heat as well as the braking heat. Magnitidue of the direct current outgoing from the rectifier maybe regulated by a pulse regulator.

Abstract: A gear-reducing, torque-multiplying gear drive assembly includes a stationary outer case housing an internal rotary carrier having an output shaft fixed thereto which is journaled by the case for rotation of the carrier and shaft relative to the case. A pair of electric motors are mounted on the carrier and drive a pair of associated planet gears which are enmeshed with a fixed sun gear. Operating the motors rotates the planet gears causing the carrier and the output stub shafts fixed thereto to rotate about a common axis of the stub shafts.

Abstract: An electrical machine has a rotor shaft (12) which carries a plurality of rotor discs (14) for rotation therewith. Each rotor disc (14) has pairs of rotor rims (16) secured thereto. Each rotor rim (16) consists of a single row of alternate magnets (20) and laminated pole pieces (18) and is opposed by a series of stator cores (22) which straddle the rotor rim (16). Armature windings (24) are disposed within the stator cores (22) for operably exciting said stator. The phase relationship between the currents through the armature windings (24) and the orientation of the stator cores (22) or the magnets (20) in opposing rims (16) are such that the effects of electromagnetic coupling, long path fluxes and torque ripple is reduced.

Abstract: In a permanent magnet rotor type electric motor having a stator core generating a rotation magnetic field and provided therein with a rotor core in which each magnetic pole is formed by a permanent magnet, the rotor core is fabricated by coaxially and unitedly joining a first core member and a second core member, in which a first permanent magnet of a predetermined cross-section shape is embedded per magnetic pole in the first core member, and a second permanent magnet which is made of a different material and has a different cross-section shape from those of the first permanent magnet is embedded per magnetic pole in the second core member, thereby achieving the permanent magnet rotor type electric motor having the performance and size appropriate for the intended use.

Abstract: A rotary shaft of a starter motor drives a crankshaft through an overrunning clutch and a rotary shaft of a generator. When an engine is started, the crankshaft drives a driven member of the overrunning clutch through the rotary shaft of the generator. A centrifugal member of the overrunning clutch separates a torque transmitting unit from the drive member or driven member of the overrunning clutch when the engine runs at a high speed to prevent wear of the overrunning clutch.

Abstract: A microengine uses two synchronized linear actuators as a power source and converts oscillatory motion from the actuators into constant rotational motion via direct linkage connection to an output gear or wheel. The microengine provides output in the form of a continuously rotating output gear that is capable of delivering drive torque at a constant rotation to a micromechanism. The output gear can have gear teeth on its outer perimeter for directly contacting a micromechanism requiring mechanical power. The gear is retained by a retaining means which allows said gear to rotate freely. The microengine is microfabricated of polysilicon on one wafer using surface micromachining batch fabrication.

Abstract: An improvement in a generator having a rotor, a stator, a magnetic field structure disposed on one of the rotor and the stator and an armature winding disposed on the other end of the rotor and the stator wherein the armature winding is disposed in a useful flux path comprises an additional armature winding disposed in a leakage flux path wherein auxiliary power is developed by the additional armature winding for one or more electrical loads.

Abstract: A hybrid permanent magnet dc motor includes three sets of permanent magnets supported by the rotor and three sets of corresponding stators fastened to the surrounding frame. One set of magnets operates across a radial gap with a surrounding radial gap stator, and the other two sets of magnets operate off the respective ends of the rotor across respective axial gaps.

Abstract: A brushless synchronous rotary electrical machine comprises stationary stator and "inner" windings. Only the rotor moves. The inner windings are stationary helical windings, concentric with the rotor shaft and attached to the stator armature. Variation in time of the magnetic field associated with the rotor is provided by two magnetically interactive (ferromagnetic or ferrimagnetic) rotor projections that sweep past the sides of the inner windings as the shaft rotates, each projection including a certain number of lobes. The stator includes a magnetically active hub, within which the rotor rotates, from which project magnetically active stator cores. The stator windings are wound helically around the stator cores. Because all windings are stationary, brushes and rings are not needed. With three times as many stator cores as lobes in each projection, the machine functions as a three-phase generator.

Abstract: A synchronous electrical machine comprising a rotor and a stator, each having a plurality of notches, wherein the rotor is a stack of laminations without conductor windings and without permanent magnets, and wherein the stator has magnetizing means defining at least one pair of poles thereon, while the notches of said stator receive at least one secondary winding.

Abstract: An electric machine, such as a motor or a generator, comprises a stator having a plurality of stator poles defining a plurality of slots, a rotor positioned within the stator, and at least a two sets of stator windings wound on the stator poles and occupying said stator slots such that the boundary windings of each set of stator windings occupies a common slot. These boundary windings of each set of stator windings are non-overlapping and include insulation positioned between them. The sets of stator windings are wound on the stator poles in a single pitch winding configuration significantly reducing the number of wire crossings resulting. In particular, the endturns defined by the individual phase coils are non-intersecting. Such a machine provides continued operation under various fault conditions.

Abstract: An axial flux reluctance machine including a rotor formed from a wound tape of paramagnetic material, a first stator formed from a wound tape of paramagnetic material and a similarly constructed second stator, where the first and the second stators define stator poles and wherein the stator poles of the first stator are not completely aligned with the stator poles of the second stator. Also a reluctance machine system for energizing the axial flux reluctance machine and methods for forming the wound tape rotor and stators.

Abstract: A motor produces a rotary motion by synchronizing the attractive and repulsive magnetic interactions of magnetic fields. A stator magnetically interacts with a rotor, cycling through changes in magnetic phase. A minimum of energy is required to spin the stator between modes. During a freewheeling state, the stator spins about its own axis while a rotor passes by. A second stator interacts with a magnetic field to create an equal and opposite magnetic force sufficient to rotate the stator. A rotor is mounted about a central axis and has a pair of diametrically opposing arcuate magnetic channels located substantially near the periphery of the rotor. A magnetic field extends substantially across each channel in which the polarities of the channels are equal and opposite extending radially outward or inward with respect to the central axis. When the rotor channel passes through a stator central axis of rotation, the rotor and stator are in magnetic proximity to one another.

Abstract: A sealed actuator includes a motor stator having rotation-drive magnetic poles; a motor rotor arranged so as to confront magnetic pole surfaces of the motor stator while interposing a small distance therebetween and rotatably supported through roller bearings; and displacement detecting means for measuring displacement of the motor rotor. A partition wall made of a nonmagnetic metal is disposed in a clearance between the motor stator and the motor rotor, so that the inner space where the motor stator is disposed is hermetically covered. The bearings are disposed at both sides of the partition wall in the axial direction so that the load applied to the bearings are directly received by a housing. At least a part of the partition wall is reinforced by reinforcing members and a mold agent is charged into the space on the motor stator side.

Abstract: An electric pancake motor providing multi-directional output for use in a multi-functional apparatus in an automotive setting. The electric motor may rotate an actuator shaft about its axis to provide rotary output, as well as linearly translate the actuator shaft along its axis to provide axial output. Belleville washers, springs or other elastic members may be use to prevent axial translation of the actuator shaft during normal operations. In another aspect of the present invention, the electric motor may be driven by a single power source and selectively actuates at least two mechanically coupled thereto.

Abstract: A rotation restricting member made of a resilient body such as a leaf spring is driven by a magnet switch upon energization of a motor and engages engaging grooves formed on an outer peripheral surface of an outer portion of a one-way clutch so that the rotation restricting member restricts rotation of the one-way clutch. The motor has first and second field coils connected in parallel. The first field coil is connected to an exciting coil in the magnet switch in series and the second field coil is connected to a motor contact in the magnet switch in series. When a starter switch is actuated, only the first field coil is actuated first with low voltage. Then, the motor contact is closed and the second field coil is actuated also so that the motor rotates at a high speed with full voltage.

Abstract: Apparatus for reducing vibration on three axes and which can be used at normal temperatures includes two masses (49 and 50, FIG. 10) suspended by a flexible rod (48) itself suspended by two resilient suspensions (57 and 58). An electrodynamic motor constituted by two electromagnets acts along axis YY', two electromagnets act along axis ZZ', and eight electromagnets act along axis XX', the motor being servo-controlled to the vibration which is to be reduced, and generating motion of the two masses (49 and 50) along three orthogonal axes to oppose the vibrations that are to be reduced. The simpler example has two masses capable of moving in a plane and disposed at the ends of two flexible structures coupled together via a cylindrical plate.

Abstract: An electrical generator has at least one rotating ring of field magnets which produce a circular array of magnetic fields, and a ring of generator output coils which are in the magnetic fields. The field magnets are permanent magnets. The generator output coils are movable in a displacement path toward and away from a null position at which they are exposed to zero net flux from the magnetic fields. Movement of the coils by an actuator varies the amplitude of the voltage induced in these coils by the rotating field magnets. The actuator is energized by an alternating current to create a mechanical oscillation of the generator output coils in their displacement path. The coils provide a raw amplitude-modulated signal that has a carrier frequency which is a function of the rotational velocity of the field magnets and a modulation frequency that is proportional to the mechanical oscillation of the generator output coils.

Abstract: A brushless generator provides increased output by providing air-core coils (936,956) in place of ferrous coils in regions of the generator which operate at high frequencies. The air-core coils (936,956) enable the generator to rotate at speeds in excess of 24,000 rpm while continuing to operate efficiently because core losses, due to the use of traditional iron cores (e.g., hysteresis and eddy-currents), are virtually eliminated. In preferred embodiments, rotating air-core coils (936) pass through stationary electromagnet fields (920) that induce amplified AC currents in the coils. The AC currents are rectified (950) and fed to rotating electromagnets (922) which create rotating fields. A second set of air-core coils (956) is oriented such that they pass through the rotating fields, which induce an AC voltage which may be used as the output of the generator.

Abstract: A hybrid type stepping motor includes coils located on the outer or inner periphery of stator yokes provided on a fixed shaft. This structure allows the coils to be disposed more easily and thus at a lower cost. Furthermore, it is possible to achieve a great increase in the density of winding. Auxiliary magnetic plates and auxiliary magnets are disposed at both ends of a stator yoke assembly so that a magnetic circuit is formed at both ends. According to the invention, a motor having any desired number of phases may be achieved. A magnet is disposed in each space between adjacent teeth of either a rotor or a stator or otherwise of both rotor and stator. The magnetomotive force of the magnet suppresses leakage magnetic flux and concentrates the magnetic flux within the region between the rotor and stator. As a result, in operation, an abrupt change in the magnetic flux can be obtained, which leads to an increase in the torque.