Abstract: A magnet holder assembly for a clutch includes a magnet holder and first and second permanent magnets. The magnet holder includes a body portion, a first groove defined in the body portion, a second groove defined in the body portion adjacent to the first groove, and a flange extending from the body portion opposite the first groove and extending in a different direction than the first groove. The flange has a connection feature for securing the magnet holder to a rotatable component of the clutch. The first permanent magnet is radially retained by the first groove in the body portion, and the first permanent magnet has a beveled edge configured to mate with the first groove. The second permanent magnet is radially retained by the second groove, and the first permanent magnet and the second permanent magnet have magnetic orientations arranged substantially opposite one another.

Abstract: A liquid-cooled self-excited eddy current retarder having two salient poles is provided. The liquid-cooled self-excited eddy current retarder may comprise a retarder rotor, a retarder stator, a retarder coil, a retarder generator and a control module. The retarder rotor may be a jugged turntable, and an axial cross section of the jugged turntable may be in an inverted h shape. Two projections at two sides of the jugged turntable may form two salient poles of the retarder rotor. The retarder rotor may be connectable to a transmission shaft, and an inner circle of the retarder stator may be coaxial with an outer circle of the retarder rotor. The retarder coil may be an independent coil and disposed between the two salient poles of the retarder rotor. The retarder coil may be affixed to the retarder stator.

Abstract: An apparatus for transferring torque magnetically with a primary rotary member and a secondary rotary member, wherein said rotary members are disc shaped and are sandwiched between one another. The primary rotary member has permanent magnets mounted radially on a disc, the secondary rotary member having disc geometry with electro conductive material arranged on it. The secondary rotary member also having magnetically permeable material. The new improvements herein have modified the earlier cylindrical design to that of a an alternative disk—plate/shape design utilizing the similar magnetic circuit that which overcomes some deficiencies/problems in the prior art, in that the prior art required more precision alignment of the electro-conductive rotor inside the magnetic can array and requires additional strength in the foundations of the machinery in order to maintain the air gap between the magnet can and the rotor assembly.

Abstract: A friction clutch (5) having a drive side and an output side which can be used to drive a fan impeller (2), and a selectively engageable friction disk clutch (13), which in the engaged state connects the output side to the drive side, and a first eddy current clutch (15) for providing a slip speed on the output side, the first eddy current clutch (15) having an eddy current zone formed on a cooling ring (11), wherein an eddy current zone for a second eddy current clutch (18) is provided on the same cooling ring (11) on which an eddy current zone for the first eddy current clutch (15) is formed.

Abstract: A linear drive based on linear motors, for panels, in particular sliding doors, movable along a respective travel path. A linear drive for at least one panel, in particular a sliding door leaf, movable along a travel path, has at least one linear motor for this at least one panel. The linear motor is provided with a stator member and a carriage. Furthermore, the linear drive has a control circuit. The control circuit is adapted to stop the linear motor in the event of failure of power supply to the linear motor, by switching-off the linear motor and operating it as a generator. Thereupon, in terms of its displaceability, this movable panel is enabled by the control circuit. In addition, the linear drive has a switch for switching-off the energy supply to the at least one linear motor.

Abstract: A passive drive motor is disclosed. A stator assembly is connected to a base. A rotating shaft is rotatably connected to the base. A rotor assembly is connected to the rotating shaft. The rotor assembly interacts with the stator assembly to rotate the rotating shaft. A first metal disk is rotated by the rotating shaft. At least one first magnet pair is disposed on the first metal disk. A second metal disk opposes the first magnet pair. When the rotating shaft rotates to drive the first metal disk to rotate, the first magnet pair disposed on the first metal disk magnetically interacts with the second metal disk, driving the second metal disk to rotate with respect to the first metal disk.

Abstract: A magnetic braking, governing, or speed retarding system for use with a wheeled conveyance may take advantage of eddy currents induced when a magnet moves past a non-magnetic conductor. A plurality of magnets may be disposed within a rotor that rotates as a wheel axle rotates. The magnets rotate past one or more relatively stationary stators to generate eddy currents that create a resistance on the rotor, thereby acting to retard or slow the rotational speed of the rotor and the axle. The system may be particularly well-suited with a wheeled conveyance such as a sled that is gravity driven and travels downhill along a track. The speed governing system may apply lesser force in relatively flat sections of the track, due to slower wheel rotational speeds, and greater force as the conveyance attempts to pick up speed, e.g., in steeper sections.

Abstract: An electric damper for damping the relative movement between a first and a second mass includes a generator integrated into a gear and driven by the movement of the first and second masses. A first gear element forming a stator is set into rotation by the movement of the masses. A second gear element forming a rotor is rotated by the rotation of the first gear element. The second gear element is directly or indirectly coupled to the first gear element with a gear ratio. Either the first or the second gear element includes means for generating a magnetic field.

Abstract: A magnetic coupler comprises a magnet rotor that includes a permanent magnet; a conductor rotor that includes a non-ferrous electroconductive plate; and a fan mounted on one of the magnet rotor and the conductor rotor, wherein the fan is designed to blow air into the magnetic coupler during operation. The permanent magnet of the magnet rotor is spaced by an air gap from the electroconductive plate of the conductor rotor.

Abstract: An electromagnetic resistance apparatus includes a magnetically controlled mechanism. The magnetically controlled mechanism includes a spool, a coil wound around the spool, two magnetic units connected with the spool, and a clearance defined between the two magnetic units and aligning with the coil. Thus, the coil is directly wound around the spool, the magnetic plates laminate each other to form each of the two magnetic units, and the two magnetic units are directly combined with the spool, so that the magnetically controlled mechanism is assembled easily and quickly so as to shorten the time and save the cost of assembly of the electromagnetic resistance apparatus.

Abstract: An electromagnetic resistance apparatus includes a support frame, a metallic conductive plate rotatably mounted on the support frame, and at least one magnetically controlled mechanism mounted on the support frame and aligning with the metallic conductive plate. Thus, the electromagnetic resistance apparatus has a modularized structure so that the electromagnetic resistance apparatus is mounted on a rehabilitation or exercising equipment easily and quickly so as to shorten the time and save the cost of assembly of the electromagnetic resistance apparatus.

Abstract: This coupling device includes a magnet rotator and a yoke-side member, while a conductor portion of the yoke-side member has a plurality of first conductor portions at least on a side opposed to magnets. A yoke of the yoke-side member is arranged at least on the side opposed to the magnets in a clearance between the plurality of first conductor portions. The ratio of the circumferential length of each of the first conductor portions to the circumferential length of the yoke is at least 1/1.4.

Abstract: A generator rotor torsional damper system includes a prime mover for generating rotational force, a generator stator, a generator rotor rotatably supported relative to the generator stator and configured to receive a rotational force input from the prime mover, a flywheel rotationally supported relative to the generator rotor by bearings, and an eddy current coupling operably connected between the flywheel and the generator rotor such that rotation of the generator rotor induces rotation of the flywheel in a common rotational direction through engagement by the eddy current coupling.

Abstract: Some embodiments of a clutch system may an output member and an input member can be biased to engage one another along opposing clutch surfaces. When input member drives rotation of the output member and a fan blade device secured thereto, the resulting fan thrust provides supplemental engagement to the opposing clutch surfaces.

Abstract: Some embodiments of a clutch system may drive an output member to rotate at a first speed when the opposing clutch surfaces are engaged and to rotate at a second speed when the clutch surfaces are shifted to a disengaged position. In particular embodiments, the multi-speed clutch system may employ an eddy current drive system that causes the output portion to rotate even when the opposing clutch surfaces are disengaged.

Abstract: A damper system for a vehicle including an electromagnetic damper, wherein the electromagnetic damper includes: (i) an electromagnetic motor; (ii) a motion converting mechanism; and (iii) an external circuit including (A) a first connection passage, (B) a second connection passage, (C) a first-connection-passage-current adjuster, and (D) a second-connection-passage-current adjuster, wherein the damper system comprises an external-circuit controller including: (a) a main-adjuster control portion configured to perform, on one of the first-connection-passage-current adjuster and the second-connection-passage-current adjuster that is designated as a main adjuster, a first control for mainly damping the relative vibration of the sprung portion and the unsprung portion; and (b) an auxiliary-adjuster control portion configured to perform, on one of the first-connection-passage-current adjuster and the second-connection-passage-current adjuster that is designated as an auxiliary adjuster, a second control for assisti

Abstract: The invention relates to a device for generating a torque on an output member in response to a torque setpoint, including a first motor unit including at least one motor of a first power, or small motor, having a shaft to which the output member is connected, a second motor unit including at least one motor of a second power higher than the first power, or large motor, having a shaft rotationally connected to the output member via viscous coupling means, and servo-control means programmed, in response to a torque setpoint (Msp), to power the second motor unit so that the viscous coupling means provide a viscous torque (Mvisc) conforming to the torque setpoint and, in parallel with this, to power the first motor unit so that it produces the additional torque between the torque setpoint and the viscous torque until the viscous torque reaches the value of the torque setpoint.

Abstract: Magnetic gearboxes an inner rotor and an outer rotor are known with pole members between them. However, these gearbox arrangements generally have a fixed gear ratio between the rotors. By provision of pole members with coils between them and associated switches to adjust the magnetic flux modulation capacity between the rotors it is possible to create open circuit, closed circuit and variable impedance configurations which will relatively passively adjust the magnetic flux modulation capacity or by presenting a voltage to the coils or drawing a voltage from the coils to more actively adjust the magnetic flux modulation capacity across the arrangement. In such circumstances a wider range of gear ratios is achieved as well as the capability with regard to localized electrical power generation through the gearbox arrangement or electro magnetic braking achieved upon the gear box as required.

Abstract: A generator-brake integration type rotating machine comprises an inertia disk coupled to a shaft to rotate; a rotor ring rotating around the shaft inside the inertia disk and having magnets mounted to a circumferential outer surface thereof; and a laminated yoke positioned between the inertia disk and the rotor ring, and having brake coils located at regular angular intervals on a circumferential outer surface thereof and generator coils located at regular angular intervals on a circumferential inner surface thereof. The generator coils are wound on first bobbins which project inward from the circumferential inner surface of the laminated yoke, and the brake coils are wound on second bobbins which project outward from the circumferential outer surface of the laminated yoke. The laminated yoke is fixedly coupled to a stator holder, which in turn is coupled to the shaft by way of a bearing and is fixedly coupled to a housing.

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: An apparatus for transferring torque magnetically with a primary rotary member and a secondary rotary member. The primary rotary member has permanent magnets mounted circumferentially on a cylinder, the secondary rotary member having a cylindrical geometry with electroconductive material arranged on its outer periphery and parallel to the axes of the rotary members. The secondary rotary member also having magnetically permeable material. The secondary rotary member is placed partially or totally inside the primary rotating member. The secondary rotary member's axial position relative to the primary rotating member can be varied by a suitable mechanical structure. This causes the two rotary members to axially overlap one another more or less as desired.

Abstract: A damping apparatus is disclosed including at least one pair of magnets, a conducting member, a magnetic shunt, and a temperature sensing mechanism. The pair of magnets defines a gap therebetween. The magnets generate a magnetic flux circuit having a magnetic flux path within the gap and a magnetic flux return path outside the gap. The conducting member is positioned at least partially within the gap. The magnetic shunt is positioned at least partially within the magnetic flux return path of the magnets. The temperature sensing mechanism is coupled to the magnetic shunt. The temperature sensing mechanism is configured to control a position of the magnetic shunt based on a sensed temperature.

Abstract: A magnetic actuator, comprising, an inner ring, an outer ring disposed around the inner ring, a first pair of inner teeth disposed on the inner ring that partially define a gap between the first pair of inner teeth having a first angular dimension, a second pair of inner teeth disposed on the inner ring that partially define a gap between the second pair of inner teeth having a second angular dimension, a first pair of outer teeth disposed on the outer ring that partially define a gap between the first pair of outer teeth having a third angular dimension and a second pair of outer teeth disposed on the outer ring that partially define a gap between the second pair of outer teeth having a fourth angular dimension.

Abstract: A disengagement assembly for disengaging a generator from an engine or gear box may include an inner ball screw having helical threading on an outer surface thereof and surrounding and operatively engaged to a rotating generator drive shaft to cause rotation of the inner ball screw, the inner ball screw may have interlockable teeth engaged to corresponding teeth of the gear box drive shaft. An outer ball screw may surround and may normally rotate with the inner ball screw. A helical ball track may be formed between the inner and outer ball screws. An eddy current brake may slow or stop rotation of the outer ball screw so that the inner ball screw may rotate relative to the outer ball screw and slide axially toward a lock thereby disengaging the generator from the engine.

Abstract: An electromagnetic friction clutch having an eddy current drive is disclosed, said clutch being used for controllably driving auxiliary units such as a coolant pump, for example, in vehicles. An advantageous, rotationally fixed connection of magnetic elements of the eddy current drive to a rotor allows a plurality of embodiments of the invention, with various design simplifications.

Abstract: An electric motor (10) with a low number of revolutions comprises a rotor (17) powered by three-phase alternating voltage, a series of magnets (21, 22) and a coil forming a stator (24), in which the rotor (17) and the stator (24) have the same number of magnetic poles. The stator (24) is powered with direct voltage, and the frequency of the rotor voltage (17) is varied to obtain a predetermined number of rpm of the motor and to vary the acceleration and deceleration conditions of the motor. A thrust bearing opposes the effort of the falling brake disc.

Abstract: The invention concerns an adjustable hysteresis driver, with a rotor component (5) on the input side that can be driven and/or a stator component (7?, 7?), with an armature component (8) on the output side in fixed connection with a shaft (4), with a hysteresis component (9) connected to the armature component (8), the stator component (7?, 7?) comprising an electromagnet (7a) or permanent magnet (18) by means of which a magnetic flux can be induced in the rotor component (5) and/or the stator component (7?, 7?), and in which the torque that can be transmitted can be adjusted by electromagnetic or electro-mechanical means. The purpose of the invention is to propose a hysteresis driver with improved adjustability.

Abstract: An apparatus for transferring torque magnetically with a primary rotary member and a secondary rotary member, wherein said rotary members are disc shaped and are sandwiched between one another. The primary rotary member has permanent magnets mounted radially on a disc, the secondary rotary member having disc geometry with electro conductive material arranged on it. The secondary rotary member also having magnetically permeable material. The new improvements herein have modified the earlier cylindrical design to that of a an alternative disk—plate/shape design utilizing the similar magnetic circuit that which overcomes some deficiencies/problems in the prior art, in that the prior art required more precision alignment of the electro-conductive rotor inside the magnetic can array and requires additional strength in the foundations of the machinery in order to maintain the air gap between the magnet can and the rotor assembly.

Abstract: An axial gap electric dynamo machine has a horizontally disposed rotor disk that is stabilized at its periphery by a plurality of permanent magnets connected to a ferromagnetic bearing plate that provides an opposing or repulsive force against the rotor magnets. In some preferred embodiments, the bearing plate magnets are configured in a dual band to further enhance the magnetic field that supports the periphery of the spinning rotor.

Abstract: A system and method for generating and harvesting energy in response to the flow of water through rotating device, such as a nutating or oscillating disk. Mechanical energy from flow of water is converted into electrical energy via an energy conversion unit. For example, the power generation system may be used to power electronic and mechanical devices used in automated meter reading (AMR) systems. The power generator system may recharge a storage circuit that enables long term AMR operations without the need for battery replacement. The power generation system, in various embodiments, can provide additional power for two-way communication and other sensors such as pressure, temperature, water quality and services such as remote shut-off, event-based messaging, and water quality monitoring.

Abstract: A device for imposing a torque load upon rotating machinery comprises a rotary unit and plural electromagnetic units. The rotary unit includes a shaft and conductive disks discretely fastened thereto. Each electromagnetic unit includes a bracket-shaped magnetic core and one or more ferromagnetic pieces discretely fastened thereto. The device's shaft is joined end-to-end to the motor's shaft, permitting integral axial rotation of the device's shaft, the disks and the motor's shaft. Each electromagnetic unit is placed so that the core “brackets” the two extreme disks, while each piece is between two disks. During rotation, a wire (coiled around each core) conducts current of selected amperage so as to generate a magnetic field of sufficient intensity that a magnetic flux circuit is formed through the stationary core and pieces and the rotating disks, resulting in a Lorentz force associated with the magnetic field and eddy currents engendered in the disks.

Abstract: An arrangement for conveying fluids has a fluid pump (174) having a rotatably journaled pump wheel (172) that is joined to a first permanent magnet (186) and an electronically commutated internal-rotor motor (152) having a stator (154) and a rotor (156), as well as a shaft (160) associated with the latter, which shaft is journaled rotatably relative to the stator (154) . The arrangement also has a second permanent magnet (184) joined nonrotatably to the rotor (156) , which magnet coacts with the first permanent magnet (186) to serve as a magnetic coupling. A separating can (170, 180, 188) hermetically separates the first permanent magnet (186) arranged inside the separating can, from the second permanent magnet (184) arranged outside the separating can. A fan wheel (218) mounted on the motor shaft, provides cooling air.

Abstract: A friction clutch for a driven element is proposed, wherein the driven element can clutch be connected directly to a drive and can be matched to the speed of the drive by means of a friction disk clutch. According to the invention, an eddy-current clutch which can be activated or deactivated is provided by respectively mounting or removing at least one part (1, 12) of the eddy-current clutch by means of a quick-action connection (6, 10). It is also proposed that an eddy-current and/or permanent magnet means (1, 12) is distributed in an azimuthal or circumferential manner.

Abstract: An automotive alternator includes a rotary shaft, a pulley, a stator, a rotor, and a magnetic fluctuation suppressor. The pulley is provided on the rotary shaft to transmit rotating power from an engine to the rotary shaft. The stator includes a stator winding. The rotor is mounted on the rotary shaft and configured to provide a first rotating magnetic field to the stator. The magnetic fluctuation suppressor includes a magnetic body and a magnetic source. The magnetic body is mounted on the rotary shaft such that the magnetic body is rotatable along with the rotary shaft at a rotational speed different from that of the rotary shaft. The magnetic source is fixed to the rotary shaft so as to create a second rotating magnetic field which induces a magnetic attraction between the magnetic body and the magnetic source, by which fluctuations in rotational movement of the rotary shaft are suppressed.

Abstract: Twisting flyer (1) comprising a rotary bush (6) and a hysteresis disc (7), arranged on a support sleeve (3), wherein the hysteresis disc (7) is arranged in the rotary bush (6) coaxially to the longitudinal axis of the support sleeve (3) and the rotary bush (6) has connecting elements (10) for the arrangement of the hysteresis disc (7). Openings (16) corresponding to the connecting elements (10) are arranged on the hysteresis disc (7), which openings can be brought into engagement in a positive manner with the connecting elements (10). According to the invention, the connecting elements are designed as snap-on elements (10).

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: An apparatus for transferring torque magnetically with a primary rotary member and a secondary rotary member. The primary rotary member has permanent magnets, the secondary rotary member with electro-conductive materials. The secondary rotary member also having magnetically permeable material. The secondary rotary member is placed partially or totally inside the primary rotating member. This causes the two rotary members to axially overlap one another more or less as desired. Rotation of the primary rotary member causes rotation of the secondary rotary member, since magnetic flux lines emanating from the permanent magnets mounted on the primary rotating member, cut through all, or part of, the electro-conductive material placed on the secondary rotary member. This can vary the torque transmitted between the two rotary members, thereby enabling the varying of the rotational speed of the secondary rotary member relative to the primary rotary member.

Abstract: An eddy current deceleration device comprises: a rotor mounted on a rotary shaft; a first magnet ring arranged facing this rotor and including permanent magnets that are arranged at prescribed intervals in the circumferential direction and such that the poles thereof facing each other in the circumferential direction are of a same polarity, and magnetic members interposed between these permanent magnets; and a second magnet ring arranged between this first magnet ring and the rotor and including permanent magnets and magnetic members which are similar to those of the first magnet ring; at least one of the first and second magnet rings being freely rotatable. The permanent magnets of the first and second magnet rings can be magnetized separately between the first and second magnet rings.

Abstract: Ventilation devices, in particular for electric motor drives regularly comprise a fan wheel (1), which is driven by a shaft via an electromagnetic induction coupling. In order to reduce the complexity of manufacture, a stack of magnetic sheets (2) is cast in the aluminum hub of the fan wheel (1). Thus, aluminum also assumes at the same time the function of a damper winding.

Abstract: Rotational force of a driving motor is transferred to a photosensitive drum via a planetary-rolle reduction device, so that the photosensitive drum is rotated. A speed detector set on the shaft of the photosensitive drum detects the rotational speed of the photosensitive drum. In accordance with the detected rotational speed of the photosensitive drum, the rotational speed of the driving motor is adjusted so that the photosensitive drum is rotated at a constant speed.

Abstract: An eddy current deceleration device includes a rotor mounted on a rotary shaft; a first magnet ring arranged facing this rotor and including permanent magnets that are arranged at prescribed intervals in the circumferential direction and such that the poles thereof facing each other in the circumferential direction are of a same polarity, and magnetic members interposed between these permanent magnets; and a second magnet ring arranged between this first magnet ring and the rotor and including permanent magnets and magnetic members which are similar to those of the first magnet ring; at least one of the first and second magnet rings being freely rotatable. The permanent magnets of the first and second magnet rings can be magnetized separately between the first and second magnet rings.

Abstract: Electromagnetic retarder brake systems, and methods for their use, are provided utilizing specified thickness conductive layers. The specified thickness of the conductive layer in each system is determined to obtain a certain desired torque at a certain desired low rotational frequency. The specified thickness conductive layer is disposed between a winding and a rotor within each system. By utilizing a specified thickness conductive layer, torque on the rotor at low rotational frequencies is increased, thereby improving deceleration capabilities.

Abstract: The magnetic drive system includes a motor and motor shaft and a motor assembly, the motor assembly including a cylinder of copper. A machine assembly for driving a machine includes a permanent magnet assembly. The motor assembly and the machine assembly are supported relative to each other so that the permanent magnet assembly and the ring of conductive material are in longitudinal juxtaposition so that rotation of the motor shaft results in rotation of the machine shaft through magnetic action.

Abstract: A rotational control apparatus includes a first rotatable assembly and a second rotatable assembly. The first assembly is rotatably mounted to a first support mount. The second assembly is rotatably mounted to the first assembly and is axially moveable relative to the first assembly. The first and second assemblies have respective coaxial surfaces adjacent to and spaced from one another and further have respective axial surfaces that frictionally engage one another when the second assembly is in a first axial position and disengage when the second assembly is in a second axial position. The second assembly is capable of rotation independent of the first assembly when the second assembly is in the second axial position.

Abstract: The invention comprises a retarder system for use with road vehicles. The retarder system discloses an improved vehicular retarder which incorporates the use of a PMG Gear ratio which permits use of a permanent magnet generator on a secondary shaft that is coupled by the gear ratio to a drive train.

Abstract: A composite magnet has an iron core, a coil around the iron core, and a permanent magnet in the iron core. A first eddy current retarder includes a brake drum with a rotatable shaft, and a stationary magnet unit inside the inner peripheral surface of the brake drum and having an annular base portion, iron core portions, a support member having magnetic pole pieces at the ends of the iron core portions and opposed to the brake drum, electromagnets, and a permanent magnet in each of the iron core portions with its magnetic pole surface directed in the radial direction. A second eddy current retarder includes a stationary brake drum, an annular magnet support member coupled to a rotatable shaft and inside the inner peripheral surface of the brake drum, and magnets outside the magnet support member and opposed to the surface of the brake drum.

Abstract: The invention relates to a device in a deck for playing information discs (2), which preferably have been provided or can be provided with digital information, the information disc (2) being rotated, in the operating condition, about its center by a drive motor (5) and magnetically cooperating material parts (8, 9) being present, which are offset radially with respect to the axis of rotation (3) and in the direction thereof parallel with respect to one another and of which one part (8) is disposed on the base plate (4) which carries the motor (3) and of which the other part (9) is disposed on the disc support (1) which is moved by the motor shaft (6), one of the material parts (8, 9) being a ring-shaped permanent magnet, at least one of the two magnetically cooperating material parts (8, 9) being arranged eccentrically with respect to the axis of rotation (3) and both material parts (8, 9) are ring-shaped, the directions of the lines of field not being changed during rotation.

Abstract: Electromagnetic retarder brake systems, and methods for their use, are provided utilizing specified thickness conductive layers. The specified thickness of the conductive layer in each system is determined to obtain a certain desired torque at a certain desired low rotational frequency. The specified thickness conductive layer is disposed between a winding and a rotor within each system. By utilizing a specified thickness conductive layer, torque on the rotor at low rotational frequencies is increased, thereby improving deceleration capabilities.

Abstract: An apparatus for inducing drive is shown that includes a primary drive shaft and four secondary drive shafts. The primary shaft and secondary shafts are fitted with magnets that are oriented such that when the primary shaft is rotated the secondary shafts are caused to rotate due to attractive or repulsive forces. The primary shaft is connected to and rotated by a rotational energy source such as a motor powered by electricity or a battery, although any source of energy to cause rotation of the primary shaft may be used. Each secondary shaft is fitted with two annular magnetic discs that are oriented to vertically support the weight of the shaft (and any attachments/fittings thereto) above the alternating or generating device. The discs can be arranged to provide either an attractive or repulsive magnetic force between them.

Abstract: An eddy current retarder having a rotor part of the retarder with symmetry of revolution about the axis of the engine shaft so that it has a peripheral face facing a peripheral face of the stator part, the inductor of the retarder having at least one electromagnetic winding. Thus, the Eddy current retarder maintains a compact structure while at the same time allowing simple and easy control over its magnetic flux by virtue of the presence of electromagnets.