Abstract: A friction clutch includes a reference plane aligned perpendicular to a rotational axis, a first clutch component, and a second clutch component. The first clutch component has a first friction element, a first support part that receives the first friction element, a leaf spring unit including a leaf spring that rotationally fixes the second support part to the first support part. The second clutch component has a second friction element. The first friction element lies against the second friction element in a frictionally locking manner in a closed position, and is axially spaced from the second friction element in an open position. The leaf spring is designed and positioned relative to the reference plane in a set angle in the closed position such that an additional axial force is applied to the first friction element and the second friction element in a drive rotational direction of the first clutch component.

Abstract: A friction clutch for releasable transmission of a torque between a first drive unit and a second drive unit includes a rotational axis, a friction package for transmitting the torque in a pressed state, a first actuating element, and a second actuating element. The friction package has at least one friction plate and at least one friction disk. The first actuating element is arranged on a first side of the friction package for pressing the friction package in a first axial actuating direction to achieve the pressed state, and the second actuating element is arranged on a second side of the friction package, opposite the first side, for pressing the friction package in a second axial actuating direction, opposite the first axial actuating direction, to achieve the pressed state.

Abstract: A hybrid module is compact and easy to construct, with components for transmitting torque to at least one transmission input shaft. The disclosed hybrid module includes a counterplate, or at least one counterplate in the case of multiple counterplates, of a clutch device is connected to a rotor element. The connection may be a direct connection, or a connection without intermediate elements, in which no intermediate element is provided for bridging an axial spacing between the rotor and the counterplate. Thus, coupling of an electric machine of the hybrid module and of the clutch device is realized with a minimal structural space requirement. By means of this measure, the clutch device can project into a stator of the electric machine.

Abstract: An arrangement for an internal combustion engine, including a flywheel connectable the crankshaft of the internal combustion engine, a starter generator arranged in a housing of the flywheel, and a friction clutch, which connects the flywheel to a transmission. An intermediate piece is fastened to the output side of the flywheel, such that a torque-transmitting fastening of the intermediate piece to the flywheel is arranged radially to the inside of a torque-transmitting fastening of the intermediate piece to the friction clutch, with respect to the radial spacing from the axis of rotation of the flywheel, and that the intermediate piece forms the abutment for a friction lining of the friction clutch at an abutment surface.

Abstract: A rotor-stator structure including plural bumper elements that may employ synthetic sliding bearing surfaces, mounted to the stator, and designed to contact a machined surface on the rotor if generator structural deflection occurs during operation. During normal operation, the bearing surface is not in contact with the machine rotor. If extreme loads are imposed on the rotor or stator structures, or other issue like bearing failure, causes the air gap to close, the bumper elements will “touch down” on a machined surface on the rotor to maintain a minimum air gap.

Abstract: A magnetic-controlled actuator (100) with an auto-locking function for joints of a manipulation arm mainly includes an inner-layer stator (10), an inner-layer mover (20), an outer-layer mover (30), an outer-layer stator (40), and a fixing shaft (50). The inner-layer mover (20), the outer-layer mover (30), and the outer-layer stator (40) have a plurality of permanent magnets, respectively. The fixed shaft (50) simultaneously penetrates through the inner-layer stator (10), the inner-layer mover (20), the outer-layer mover (30), and the outer-layer stator (40) forming a coaxial arrangement. The inner-layer mover (20) rotates relatively to the inner-layer stator (10) to output power from the actuator (100). Therefore, a cogging effect, which is produced due to interaction of the permanent magnets between the outer-layer mover (30) and the outer-layer stator (40), is automatically produces a high cogging torque for the actuator (100).

Abstract: A starter-generator is provided for a motor vehicle that has a drive train (1) with a drive machine (4), a torque-transmission device (8) and a transmission. The starter-generator (20) has an external rotor (22) and a stator (21). To simplify the manufacture of the motor vehicle, the starter-generator has a rotor flange (28) connected in a rotationally fixed fashion to an input component (16) of the torque-transmission device (8) and extends from the rotor (22).

Abstract: A coupling device for the transmission of torque. The coupling device includes a drivable rotor part, an output shaft rotatably connected with an armature part, a hysteresis part disposed on the armature part, permanent magnets configured to generate a magnetic field through which magnetic field a torque can be transmitted from the rotor part to the armature part, a stator part in which an electromagnet is disposed, the electromagnet being configured to induce a magnetic flux in the rotor part so as to adjust a torque from the rotor part to the armature part, and a synchronous coupling disposed between the stator part and the armature part.

Abstract: A high volume low speed (HVLS) fan provides improved air circulation and thermal control in a building by incorporating composite fan blades pivotable to both positive and negative pitch angles. The blades are molded of polymer material over a metal tube core for strength and ease of attachment to the fan hub, and have a symmetrical airfoil shape to produce an efficient bi-directional conical airflow. The fan includes a control unit providing manual and automated intelligent control over blade angle and rotational speed, as well as startup with approximately zero blade angle for more economical power consumption and less motor wear. The fan structure and mounting system allows the fan to be installed at an optimal height inside a variety of buildings to provide increased efficiency of air destratification and air mixing. An array of multiple HVLS fans with alternating directions of airflow can further increase efficiency of air movement.

Abstract: The present disclosure provides a motor overload protection device that includes a driving gear, a loading wheel, and at least one protecting gear unit rotatably fixed to the loading wheel. The loading wheel defines a central through hole for rotatably receiving a rotor of a motor. The driving gear is fixed on the rotor. The at least one protecting gear unit is rotated by the rotor. A resistance between the at least one protecting gear unit and the loading wheel is predetermined. When the load on the loading wheel is less than or equal to the maximum load of the motor, the resistance keeps the loading wheel and the at least one protecting gear unit together rotating around the rotor of the motor. When the load is greater than the maximum load of the motor, the at least one protecting gear unit rotates relative to the loading wheel.

Abstract: A power transmission apparatus includes a drive roller and a driven roller made of magnetic material, which are rotatable about different axes, and which are provided with a gap therebetween, a case enclosing the rollers, an input shaft and an output shaft connected coaxially with the rollers through the case, respectively, and a magnetic fluid housed in the case to fill the gap. The apparatus includes an electromagnetic coil for generating magnetism, and a magnetic path of the magnetism generated by the electromagnetic coil is formed so that a magnetic field is generated from the drive roller or the driven roller toward the driven roller or the drive roller via the gap.

Abstract: A drive with an electric motor, a housing and a direction-dependent brake, which includes a driver splined to a motor shaft, a drive output coupled freely pivotable around a small angle and shape-mated with the driver, several clamping devices and a clamping ring, in which the clamping devices cooperate with the clamping ring so that the brake conveys a torque from the electric motor to the driver output and brakes a back-driving torque of the drive output. The task of the invention is to present a brake in which no static redundancy occurs, which is simple to construct and in which no abrupt blocking is possible. This task is solved according to the invention in that the clamping ring is connected radially movable to the housing, a gearbox or a part attached to the housing so that the clamping ring after overcoming a defined force can be moved at least slightly radially by a clamping device.

Abstract: An apparatus and method for generating rotary oscillation with two shafts pivotable relative to each other. An end section of a first shaft is accommodated in an end section of a second shaft so as to form an air gap. One of the two shafts has a magnetic field generator of substantially constant field strength, and the other shaft has conductors which generate a magnetic field and to which current has been variably applied to pivot the shafts relative to each other.

Abstract: A no-back device for a power drive unit is configured such that, during operation of the power drive unit, the no-back device does not supply magnetic or frictional force against power drive unit rotation. The no-back device is implemented either redundantly or no-redundantly, and includes a latch rotor and an electromagnet. In both embodiments, the latch rotor is coupled to the power drive unit to rotate therewith, and the electromagnet is coupled to receive a flow of current and, upon receipt thereof, generates a magnetic field force that opposes rotation of the latch rotor. In the redundant embodiment, the no-back device further includes one or more permanent magnets, and the magnetic field generated by the electromagnet selectively opposes or aids the magnetic field supplied by the permanent magnet(s).

Abstract: A spool includes at least one bobbin and one winding wire, e.g., a winding wire lacquered for electrical insulation, the bobbin including at least one channel, e.g., one arranged as a pocket, at least one sleeve being electrically connected to the winding wire, the sleeve being electrically connected to an electrical line, e.g., a stranded conductor of a cable, the sleeve including deformable regions, for producing the electrical connections, a respectively deformable region being deformable such that a force-locking connection is provided and welding is able to be carried out.

Abstract: An electric motor with two independent output shafts connected to the rotor by coupling means working in one sense of rotation only, e.g. by means of freewheel clutches. The first freewheel works in one sense of rotation while the second freewheel works in the opposite sense. Two operating devices can be powered by the motor, simply by switching the sense of rotation; an example of use is a combined pump-compressor machine. Various embodiments are disclosed, some of them obtainable as a simple and low-cost modification of an existing motor or motor-pump assembly.

Abstract: A magnetic slip clutch has an outer rotor and an inner rotor, one of the rotors includes permanent magnets, and one of the rotors includes slots, and both rotors are located coaxially to one another; the outer rotor is embodied as a hollow cylinder open on one end, which cylinder includes a face-end covering with a central recess, by which the hollow cylinder can be located on a shaft, and the inner rotor is embodied as a solid cylinder, which is located inside the outer rotor, and a shaft can be located in a central recess in the solid cylinder, and a separate shaft is connectable to each rotor, so that the axis of rotation of the two separate shafts is identical, and a torque transmission is possible from one shaft to the other shaft by both rotors.

Abstract: A permanent magnet rotor of a generator is used to excite a electromagnet stator to generate electric power for the generator and to control a disengagement mechanism whereby the generator can disengage from an accessory, such as a gear box drive shaft, when the generator is not working properly. The permanent magnet is affixed to an outer ball screw which normally rotates with an inner ball screw that is operatively engaged to the accessory. An increased load to the electromagnet stator slows or stops rotation of the permanent magnet rotor and outer ball screw, causing the inner ball screw to move axially from the outer ball screw and away from an accessory and toward a re-settable lock.

Abstract: An actuator. In one embodiment, the actuator comprises a reversible electric motor having a stator having a housing, a rotor housed in the housing of the stator, and a shaft having a forward portion and a rearward portion extending oppositely and coaxially from the rotor, respectively; a fan member coaxially attached to the forward portion or the rearward portion of the motor shaft such that the fan member is operable simultaneously with the rotor of the reversible electric motor; and an electromagnetic brake movable between a first position and a second position, positioned in relation to the fan member such that when the electromagnetic brake is in the first position, the fan member is rotatable with the rotor of the reversible electric motor, and when the electromagnetic brake is in the second position, the fan member stops rotating firmly, thereby causing the motor stops instantly.

Abstract: A drive rotor has a coupled portion to which a coupling portion extending from a rotary shaft is loosely fitted. A driven rotor can be engaged with the drive rotor with respect to a rotating direction of the drive rotor. A restricting member is fixed to the rotary shaft so as to be integrally rotatable. In the case that the drive rotor is inclined with respect to the rotary shaft, the restricting member can be brought into contact with the drive rotor. Accordingly, it is possible to suppress an excessive looseness in a coupling mechanism.

Abstract: The vehicle-use generator includes a rotor rotatably mounted on a shaft and having a field coil wound therearound, a stator having stator winding wound therearound and fixedly disposed so as to form a gap with the rotor, a cooling fan mounted to the rotor, a pulley belt-driven by a vehicle engine and coupled to the shaft through an overrunning clutch provided therein, and a power generation control device controlling an excitation current flowing into the field coil. The overrunning clutch is configured to idle when a rotational speed of the pulley is lower than a rotational speed of the rotor to inhibit torque transmission from the pulley to the rotor, and the power generation control device is configured to forcibly increase the excitation current on a temporary basis when an upshift operation of a transmission of the vehicle is performed.

Abstract: When surplus power not charged to an electric storage is generated at the time of regenerative braking of a vehicle, a voltage is generated across first and second neutral points using a zero-voltage vector each of first and second inverters and the generated surplus power is consumed by a resistance connected across the first and second neutral points. The voltage generated across the first and second neutral points is calculated in accordance with the surplus voltage, using a resistance value of the resistance.

Abstract: A seal of an electric machine installed within a motor vehicle drive mechanism with of one of a wet-running oil-cooled disk gearshift element, a multiple disk clutch and a multiple disk brake being accommodated within a free space of a rotor of the electric machine. An oil free annular gap (3) is formed between the rotor (2) and the stator (1) of the electric machine and the annular gap (3) has a seal (9) which, at a high rate of rotation by the rotor (2) and depending on the type of gap seal, seals without touching.

Abstract: An apparatus and method for generating rotary oscillation with two shafts pivotable relative to each other. An end section of a first shaft is accommodated in an end section of a second shaft so as to form an air gap. One of the two shafts has a magnetic field generator of substantially constant field strength, and the other shaft has conductors which generate a magnetic field and to which current has been variably applied to pivot the shafts relative to each other.

Abstract: The system includes at least one transmission belt for coupling the shafts of auxiliary devices to a pulley which can be coupled for operation to the shaft of the combustion engine, and an electromagnetically operated clutch between this pulley and the shaft of the engine. An overrunning clutch is interposed between the pulley and the shaft of the engine. The clutch is normally disengaged and de-energized. The pulley has a hub fitted on an extension of the shaft of the engine with the interposition of the overrunning clutch, and has a channel-shaped cross section with a concavity facing the internal combustion engine. The electromagnetically operated clutch comprises a winding which is fixed to the engine and which extends into the concavity of the pulley, and a ferromagnetic ring carried in an axially translatable way by a support element fixed with respect to rotation to the extension of the shaft of the engine.

Abstract: A device for coupling a housing arrangement of a clutch device, particularly a hydrodynamic clutch device, to a rotor arrangement of an electric machine, wherein the rotor arrangement can be connected to a drive shaft so as to be fixed with respect to rotation relative to it, this drive shaft being rotatable around an axis of rotation. The electric machine further has a stator arrangement which can be brought into electromagnetic interaction with the rotor arrangement and the drive shaft can be driven in rotation by the electric machine and/or electrical energy can be generated by rotation of the drive shaft. First teeth provided at the rotor arrangement and second teeth provided at the housing arrangement are in a rotational driving engagement with one another or can be brought into a rotational driving engagement with one another, and an axial securing arrangement holds the rotor arrangement in axial direction with respect to the housing arrangement.

Abstract: A gas turbine engine system includes an electric starter motor which utilizes a partially hollow or cupped shaped rotor. Space is provided inside the rotor to fit the required clutch, bearings, and drive shaft. A rotor shaft drives the input shaft through the clutch. The clutch is mounted within a clutch cavity formed within an annular housing portion of the housing. The annular housing portion is at least partially conical and preferably extends at least partially within a hollow rotor mounted to the rotor shaft. A short package is provided due to the telescoped architecture while retaining the maximum length for electromagnetics.

Abstract: A fault-tolerant actuator module, in a single containment shell, containing two actuator subsystems that are either asymmetrically or symmetrically laid out is provided. Fault tolerance in the actuators of the present invention is achieved by the employment of dual sets of equal resources. Dual resources are integrated into single modules, with each having the external appearance and functionality of a single set of resources.

Abstract: A method and apparatus for providing a continuously variable transmission (CVT) is described. The CVT comprises permanent magnets to couple power, a coefficient of coupling controlled by an electronic servo control loop. Wherein torque multiplication is achieved by “duty-cycle” modulation of the magnetic coupling “pulses”, between the input shaft and output shaft.

Abstract: Arrangement for providing an integrated starter generator apparatus for producing electrical power and/or rotational torque. The apparatus includes a primary rotor (18) arranged for cooperation with a primary stator (16), and a secondary rotor (20) arranged for cooperation with a secondary stator (17). A one-way clutch (19) is disposed between the primary rotor (18) and the secondary rotor (20) that permits both rotors to be locked together in one direction of rotation, and that allows them to operate independently in the opposite direction of rotation.

Abstract: An integrated motor and clutch assembly is provided, which includes a housing that rotatably supports an input shaft and an output shaft. A selectively engageable friction clutch is disposed between the input shaft and the output shaft for transferring torque therebetween. The friction clutch includes an outer hub connected for rotation with the output shaft. The integrated motor and clutch assembly also includes a motor having a rotor non-rotatably connected to the outer hub of the friction clutch and disposed coaxial with the input and output shafts. The motor also includes a stator secured to the housing and disposed concentric with the rotor.

Abstract: A superconducting rotor assembly includes an axial shaft and a winding support structure. A torque tube is connected to this winding support structure. An interconnection assembly mechanically couples the torque tube to the axial shaft. This interconnection assembly is configured to convert a torsional torque load experienced by the torque tube to a tangential torque load which is provided to the axial shaft.

Abstract: Arrangement for providing an integrated starter generator apparatus for producing electrical power and/or rotational torque. The apparatus includes a primary rotor (18) arranged for cooperation with a primary stator (16), and a secondary rotor (20) arranged for cooperation with a secondary stator (17). A one-way clutch (19) is disposed between the primary rotor (18) and the secondary rotor (20) that permits both rotors to be locked together in one direction of rotation, and that allows them to operate independently in the opposite direction of rotation.

Abstract: A compressor includes a housing, a rotary shaft, a pulley, an electric motor, a pulley one-way clutch, and a motor one-way clutch. The shaft is rotatably supported by the housing. The pulley is operably connected to the shaft and includes a power transmission portion. When power is transmitted from a vehicular engine to the power transmission portion, the pulley is rotated. The electric motor rotates the shaft and includes a rotor, which is operably connected to the shaft. At least part of the electric motor overlaps the power transmission portion in the axial direction of the shaft. The pulley one-way clutch is located between the pulley and the shaft and selectively permits and prevents power transmission between the pulley and the shaft. The motor one-way clutch is located between the rotor and the shaft and selectively permits and prevents power transmission between the rotor and the shaft.

Abstract: A superconducting rotor assembly includes an axial shaft and a winding support structure. A torque tube is connected to this winding support structure. An interconnection assembly mechanically couples the torque tube to the axial shaft. This interconnection assembly is configured to convert a torsional torque load experienced by the torque tube to a tangential torque load which is provided to the axial shaft.

Abstract: In an electric actuator having inner component parts thereof inclusive of a motor 1 covered with a cover main body 10, the cover main body 10 having a coating (protection) function serves as a manually operating part and is equipped with a mechanism for switching between electrical and manual operations. A fixing structure for connecting and fixing an electric actuator 40 and a rotary valve 23 includes an annular one-way clutch structure 25 at one of opposite fixing positions, and includes an annular face part 6 disposed at the other of the opposite fixing positions. The annular face part 6 is inserted into the one-way clutch structure 25, thereby restraining the actuator and valve from being rotated in one circumferential direction.

Abstract: A vehicle, having an engine (20) and a transmission (26), also includes an integrated assembly (24) between the engine (20) and transmission (26) which includes both a torque converter assembly (32) and an integrated starter-generator (ISG) assembly (36). The ISG assembly (36) is mounted between the torque converter assembly (32) and the transmission (26), with an ISG rotor (56) rotationally coupled to an impeller (42) through an assembly having compliance to allow for proper assembly and operation of the integrated assembly (24).

Abstract: A hybrid-vehicle drive unit supports a motor-generator with high precision, improving the efficiency of the motor-generator, and reducing the size of the motor-generator, independent of any influence of centering precision of the crank shaft and of deformation of the torque converter. According to the invention, a motor housing is disposed between a converter housing and an internal combustion engine, and a bearing is fitted to a lateral wall provided in a front portion of the motor housing. Rotor supporting members are independently supported by the bearing. Eccentric rotation of the crank shaft resulting from explosive vibrations of the engine is counteracted by two flex plates. Owing to a predetermined clearance, one of the rotor supporting members as a separate component is free from the influence of deformation of the torque converter.

Abstract: A magnetostrictive motor is provided with a pair of clutch devices on a rotor shaft through which electrical energy from electromagnetic rings on a tubular reactor is converted into forces transferred to the rotor shaft within the reactor under selective control of magnetostrictors and clutches within the tubular reactor to either accelerate or decelerate motion imparted by such forces to the rotor shaft for change of rotor speed magnitude and direction.

Abstract: A step motor is composed of a rotor, first and second stators, and a magnetic member. The rotor is rotatably supported and comprised of a magnet having magnetic poles magnetized in four angular sections. The first stator has a pair of counter poles disposed in opposed relation to the magnet and a coil wound around the first stator. The second stator has another pair of counter poles disposed in opposed relation to the magnet and another coil wound around the second stator. The second stator is opposite to the first stator with respect to the rotor such that the counter poles of the first and second stators surround the rotor to stepwise rotate the rotor in response to electric pulses applied to the coils of the first and second stators. The magnetic member has a pair of interpoles positioned in a middle of the first and second stators in opposed relation to the rotor such as to stabilize a rest position of the rotor, which is held when the electric pulse is not applied to the coils.

Abstract: In a generator and motor system of the present invention, when an engine is running, a rotational apparatus is driven by power from the engine and a motor generator is driven to generate power, and when the engine is stopped, the motor generator is put in motion by power supply from the outside to drive the rotational apparatus. The system includes a mechanical power transmission mechanism for transmitting power of the engine to the motor generator and the rotational apparatus. The power transmission mechanism permits power transmission from the engine to the motor generator and the rotational apparatus, and prevents power transmission from the motor generator to the engine.

Abstract: An electrical generating system including an electric motor coupled to a power source, such as a solar panel array. A magnetic coupling is connected to an output shaft of the motor. The magnetic coupling includes opposed first and second plates each having permanent magnets affixed thereto and arranged such that rotation of the first plate by the motor causes the second plate to rotate by repulsive magnetic force. A gear assembly having a high transmission ratio is connected to the magnetic coupling. Preferably, at least one electrical generator is connected to the gear assembly for generating electricity.

Abstract: A dual function motor/generator includes a rechargeable battery, a mode switching device, a dual function rotor/stator structure, at least two transmission devices and a clutch device for selecting one of the two transmission devices depending on whether a motor or generator mode is selected. When the dual function motor/generator is used as a motor, power is supplied from the rechargeable battery controlled by the mode switching device to a driven load through the rotor/stator structure and one of the transmission devices, and when used as a generator, the battery is recharged by applying an external force to the load such that the load drives the other transmission device to rotate the rotor in a direction opposite a direction of rotation of the rotor in the motor mode, and thereby induce an electric current in the rotor/stator structure to recharge the battery.

Abstract: A housing of a compressor supports a rotary shaft. The rotary shaft is coupled to a pulley with a pulley one-way clutch and is coupled to a rotor of an electric motor with a motor one-way clutch. The pulley is supported by the housing with a pulley bearing. The electric motor overlaps a power transmission portion in the axial direction of the rotary shaft. At least two of the bearing, the pulley one-way clutch, the motor one-way clutch, and a brush device of the electric motor overlap each other in the axial direction of the rotary shaft. As a result, the size of the compressor is reduced in the axial direction of the rotary shaft.

Abstract: A method for making an armature assembly is provided that reduces the level of acoustic noise during initial engagement of the armature, during slippage, and during disengagement. The armature assembly includes an armature disc, an annulus of sound damping material, and a hub assembly having a flexible spider with a web portion. The armature assembly is made by first forming the annulus of sound damping material with a plurality of angularly spaced molding tabs. The annulus is affixed to the web portion of the hub assembly using the molding tabs and is then compressed by securing the armature disc to the web portion such that one side of the annulus is disposed against the web portion and a second side of the annulus is disposed against the armature disc.

Abstract: A drive system, in particular for a vehicle, includes an electric machine, by means of which a shaft can be driven to rotate and/or electrical energy can be obtained when the shaft rotates. The electric machine includes a stator arrangement with a stator interaction region and a rotor arrangement with a rotor interaction region. The rotor interaction region is coupled or can be coupled to the shaft for common rotation by means of a carrier arrangement. A torsional-vibration damper arrangement includes which is formed at least in part by said carrier arrangement, a primary side and a secondary side which can rotate, counter to the action of a damper element arrangement, about an axis of rotation (A) with respect to the primary side.

Abstract: A stator has a pocket portion (8) of a notch type resin-made stator, in which strength of an outer corner R (12b) provided in the pocket portion (8) is increased to thereby prevent the resin-made stator body (1) from being broken from the outer corner R (12b). A stator has a pocket portion (8) encasing a strut 9 of a notch type one-way clutch (5). The pocket portion (8) is provided in a stator body (1) made of resin, and corner Rs (12a, 12b) are provided on both inner and outer sides of a strut engaging surface (13) in the pocket portion (8). The outer corner R (12b) is formed to be larger than the inner corner R (12a).

Abstract: An eddy current fan drive cooling system is operable in a vehicle having a sheave rotating at a speed related to an engine speed. A driving assembly of the cooling system is attached to the sheave. A plurality of poles are exposed around an outer perimeter of the driving assembly. A plurality of windings are wrapped around the poles. The windings are electrically connected to receive a driving signal to generate a magnetic field around the poles. A driven assembly carrying a cooling fan is provided around the driving assembly. The driven assembly includes a plurality of concentric rings arranged around the exposed poles of the driving assembly. An eddy current torque is produced in the rings in response to magnetic flux passing through the rings from the exposed poles due to the magnetic field around the poles.

Abstract: In an engine starter of the present invention, a driving shaft to output a rotating force and a crankshaft of an engine are linked continuously. The engine starter comprises a one-way clutch to prevent an overrun of an armature after the engine starts. In the one-way clutch, a connecting rotation number in which an inner ring and an outer ring change from a disconnected state to a connected state in a decreasing process of engine revolutions is set above a lower limit of the engine revolutions above which the engine under suspension of the fuel supply is able to get restarted by itself by resuming of fuel supply. Therefore, the engine is always able to get restarted quickly even in a low-rotation range.

Abstract: A magnetic circuit design comprises a shaft assembly (10) consisting of a moveable shaft (12) and a series of washers (14) and magnets (16) mounted axially along the length of the shaft (12). The magnets (16) are positioned between the washers (14) with like magnetic poles facing each other. Additional washers (14) and magnets (16) may be stacked axially along the shaft (12). A cylinder assembly (20) consists of a cylinder (22) with housings (24A) and (24B) in each end. The shaft assembly (10) is positioned concentrically inside cylinder assembly (20) and is relatively rotatable to cylinder assembly (20) by means of bearings (26A) and (26B) inserted into housings (24A) and (24B). A fine magnetic powder (30) fills the air gap (28) created between the shaft (10) and the cylinder (20) assemblies.