98results about "Synchonous clutches/brakes" patented technology

A system for transferring torque between a pair of independently, concurrently rotating shafts of a turbofan engine includes a magnetic gearbox. The magnetic gearbox has a first ring structure, a second ring structure and an intermediate ring structure. Each ring structure has an annular aperture therethrough and a plurality of permanent magnets embedded therein. The intermediate ring structure is disposed between the first and the second ring structures. Each ring structure is coaxially concentric with, and independently rotatable with respect to the remaining ring structures. The first and second ring structures are each coupled to separate ones of the rotating engine shafts, and the intermediate ring is operable to transfer torque between the pair of shafts. Preferably, the intermediate ring structure is coupled to a rotating machine. The rotating machine has a controller, and is operable for adjusting a ratio of torque transferred between the pair of shafts.

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

A combined generator with built-in eddy-current magnetic resistance including a rotor and a stator iron core with generating coils winding therearound. The rotor consists of an outward turning type inertia flywheel and permanent magnets. A self-generated supply is achieved when the flywheel is driven by a fitness apparatus or a rehabilitation apparatus. An internal ring (A magnet-conductive ring) between the wheel hub and the external ring of the flywheel is extended from the internal wall toward the opening end. The internal diameter of the stator iron core is greater than the external diameter of the magnet-conductive ring such that a magnetic field gap is created. At least one receiving portion is formed in at least one portion of the internal circumference of the stator iron core for receiving at least one solenoid. The power required by the solenoid is supplied by the self-generated system such that the solenoid produces a magnetic field (by input of the power), thereby providing the magnet-conductive ring coupled to and rotated on the inertia flywheel with an eddy-current magnetic resistance. In this way, a reverse resistance acts from the inside on the inertia flywheel such that a braking effect is achieved.

A drive unit (20) particularly suited for a motor vehicle 1 which is driven by a plurality of axles, which drive unit (20) comprises a primary drive source for solely driving a first driving axle (2), and a secondary drive source which, together with the primary drive source, via a superposition drive, serves to drive a second driving axle (3). The drive unit comprises a superposition drive (14) which comprises a first input shaft (17) for establishing a driving connection with a primary driveshaft, a second input shaft (18) and an output shaft (19), and an electric motor (15) with a rotor and a stator constituting the secondary drive source whose one part (rotor, stator) is connected to the second input shaft (18) of the superposition drive (14) and whose other part (stator, rotor) is connected to a further rotating member of the superposition drive (14).

An electromagnetic, continuously variable transmission power split turbo compound includes a turbo compound turbine driven by exhaust gases from an internal combustion engine, and a power split device comprising a magnetic gear arrangement. The magnetic gear arrangement includes a high speed rotor comprising a first quantity of permanent magnets, a low speed rotor comprising a second quantity of permanent magnets, and a plural pole rotor between the high speed rotor and the low speed rotor. A first rotor of the high speed rotor, the low speed rotor, and the plural pole rotor includes a mechanical input drive adapted to be driven by the turbine. A second rotor of the high speed rotor, the low speed rotor, and the plural pole rotor includes a mechanical output drive. A third rotor of the high speed rotor, the low speed rotor, and the plural pole rotor is unconnected to a mechanical drive and includes a controlling rotor for controlling a ratio of input drive angular velocity to output drive angular velocity.

A power transmission device for transmitting a driving force from a vehicle-mounted driving source to a vehicle-mounted rotary device includes a driving rotor mechanically coupled to the vehicle-mounted driving source via a belt, and a driven rotor disposed coaxially with the driving rotor and mechanically coupled to a drive shaft of the vehicle-mounted rotary device. Furthermore, the power transmission device is provided with a magnetic join portion disposed in at least one of the driving rotor and the driven rotor, and the magnetic join portion is adapted to transmit a rotary driving force from the driving rotor to the driven rotor by a magnetic force, while keeping a predetermined clearance between the driving rotor and the driven rotor. Thus, in the power transmission device, a natural frequency can be made much lower than a frequency of vibration generated from the vehicle-mounted rotary device in idling of a vehicle.

MAW-DirectDrives are a mechanical direct drive mounting apparatus incorporating paired prefabricated frameless direct drive permanent magnets brushless motor stators as actuators. The stators mount on enhanced cooling stator mounting backs connected to a stationary sub-assembly mounting-plate that support vehicle suspensions on its rear. A drive-plate and spindle sub-assembly connected inside vehicle wheels fastens the two sub-assemblies and holds a cylindrical two-sided permanent magnets drive-rotor concentrically disposed between the stators and proximate to the stators' core peripheral surfaces to interact and actuate rotation about the stationary sub-assembly's cylindrical wheel-hub. The paired facing stators interacting with the drive-rotor create a complementary working relationship affording greater efficiency and power plus gains dual functionality by utilizing actuated rotation to generate electricity via the second stator for input back into the power supply reducing the vehicle's need of electrical power. Stationary sub-assembly mounted supplemental air brake units utilize lengthened spindles projecting out for brake-rotor operation.

An apparatus has (a) a first component having one or more electromagnetic elements and (b) a second component having one or more electromagnetic elements and movably coupled to the first component. The second component moves with respect to the first component in a cyclical manner. The one or more electromagnetic elements of the first component interacts with the one or more electromagnetic elements of the second component during each of one or more cycles of motion of the second component with respect to the first component such that, when a constant force profile is applied to move the second component with respect to the first component, the speed of motion increases and decreases one or more times during each cycle of motion due to different levels of electromagnetic interaction between the electromagnetic elements within each cycle of motion.

A combined generator with built-in eddy-current magnetic resistance including a rotor and a stator iron core with generating coils winding therearound. The rotor consists of an outward turning type inertia flywheel and permanent magnets. A self-generated supply is achieved when the flywheel is driven by a fitness apparatus or a rehabilitation apparatus. An internal ring (A magnet-conductive ring) between the wheel hub and the external ring of the flywheel is extended from the internal wall toward the opening end. The internal diameter of the stator iron core is greater than the external diameter of the magnet-conductive ring such that a magnetic field gap is created. At least one receiving portion is formed in at least one portion of the internal circumference of the stator iron core for receiving at least one solenoid. The power required by the solenoid is supplied by the self-generated system such that the solenoid produces a magnetic field (by input of the power), thereby providing the magnet-conductive ring coupled to and rotated on the inertia flywheel with an eddy-current magnetic resistance. In this way, a reverse resistance acts from the inside on the inertia flywheel such that a braking effect is achieved.

A magnetic gear arrangement includes: a first gear member for generating a first magnetic field, a second gear member for generating a second magnetic field, and a coupling device which provides an arrangement of interpoles between the first gear member and the second gear member. The interpoles couple the first and second magnetic fields to produce a gearing between the first and second gear members. The first gear member has superconducting magnets or coils for generating the first magnetic field and / or the second gear member has superconducting magnets or coils for generating the second magnetic field.

An apparatus includes a first rotor operatively connected to an output shaft and holding a first array of pole pieces; a second rotor operatively connected to an input shaft coaxially with the first rotor and holding a second array of pole pieces; and an array of field windings disposed coaxially with the first and second rotors. The array of field windings being arranged to interact magnetically with a harmonic frequency of the magnetic field of the first or second array of pole pieces in a magnetically geared manner and being selectively energizable to control electromagnetic coupling of the first array of pole pieces with the second array of pole pieces, and thereby to transfer at least one of torque and speed from the input shaft to the output shaft.

A load device for an apparatus for physical exercise that comprises a device that generate the load called linear motor, a micro controller, a series of sensors (dynamic, diagnostic and physiological) and a user interface.

The invention relates to a servo type clutch device and the operation mode thereof characterized in that two rotor shafts in line are respectively connected to an input shaft, a permanent magnetic pole is embedded on one of the two rotors or one of the two rotors is an exciting coil, the other rotor is a winding, the motor is formed by the winding and the permanent pole or the exciting coil, a servo drive is connected with the winding, a position / speed sensor of the servo drive is respectively arranged on the two rotor shafts, the servo drive has functions of torque servo and speed / position servo and a control port connected with a clutch control unit and receives the setting of torque or speed / position, mode switch signals and torque limiting setting signals. The servo drive is connected to a power storage device, and / or an electric device or the like. The operation mode is to confirm the work mode as required, the setting value of torque or speed / position and the torque limiting value are dynamically altered, thereby the clutch is controlled to operate in a master-slave isolation mode or in a gradually softly conjugation / separation mode or in a stable mode according to the given rule. The excess energy is converted into electric energy to use or store without radiation when the drive shaft speed is larger than that of the driven shaft.

Magnetic clutch for the transmission of tightening torque that comprises a first shaft (2) integral to a casing (3) in whose interior there is a second shaft (4) coaxial to the first shaft (2) that is fixed to the casing (3). The shafts (2, 4) are engaged together by magnetic attraction to transmit tightening torque, the clutch (1) includes a first magnetic assembly (6), linked to one of the shafts (2, 4), formed by a first group of magnets (7) of high magnetic coercivity and a second magnetic assembly (8), linked to the remaining shaft (2, 4), formed by a magnet (9) of low magnetic coercivity and by a second group of magnets (10) of high magnetic coercivity adjacent in axial direction to the magnet (9). The first magnetic assembly (6) and the second magnetic assembly (8) present a facing surface (F) in a radial direction.

A magnetic transmission assembly is adapted to integration with a motor or generator. The magnetic transmission assembly includes a rotor, a stator, and a magnetically conductive element. The rotor and the stator are sleeved coaxially and respectively have R and ST1 pole pairs. The magnetically conductive element is located between the rotor and the stator, and has permeable regions. When the magnetically conductive element is actuated, the magnetically conductive element selectively enables PN1 or PN2 permeable regions to be corresponding to the rotor and the stator. The permeable regions corresponding to the rotor and the stator interact with magnetic fields of the R and ST1 pole pairs to generate a predetermined variable-speed ratio. The magnetic transmission assembly can be integrated into the motor, so as to improve the drive power density.

The invention relates to a winding type permanent-magnet slip clutch. The winding type permanent-magnet slip clutch comprises a permanent-magnet rotor and a winding rotor coaxial with the permanent-magnet rotor. An air gap is reserved between the permanent-magnet rotor and the winding rotor. A slip ring and a carbon brush are arranged on a second rotating shaft and form a loop together with a coil winding, wherein switch-on or switch-off of the loop can be controlled by an electric switch. An induced current is generated in the coil winding through the slip between the two rotors, the coil winding with the current can be affected by electromagnetic force in the magnetic field of a permanent magnet, and then transmission of torque can be achieved; the electric switch controls switch-on or switch-off of the loop so as to control engagement or disengagement of the permanent-magnet slip clutch. The function of controlling engagement or disengagement of the clutch is achieved through switch-on or switch-off of the electric switch, and besides, the clutch has the overspeed protection function, the overload protection function, the soft start function and the good speed regulation function and can serve as a brake free of frictional contact.

The invention provides a generator (100, 400, 500). The generator includes at least one rotating member (202, 418, 518); at least one stationary member (204) arranged to define a gap (208, 424, 524) between a portion of the rotating member and a portion of the stationary member ), wherein the gap is configured to facilitate the transfer of a controllable magnetic flux therethrough; and a gap control system (200) comprising at least one gap measurement assembly (218, 220, 222, 428, 528), at least one power a transducer (232, 234, 236) and at least one controller (224) electronically connected to the measurement assembly and the transducer and configured to adjust the size of the gap by adjusting the magnetic flux .

A flexible power transmission device comprises an input shaft, a conductor cylinder, conductor rings, a permanent magnet cylinder, permanent magnets, an output shaft, a spline and a spline hub, wherein the conductor rings are mounted on the inner wall of the conductor cylinder; the permanent magnets are mounted on the outer wall of the permanent magnet cylinder; an air gap is formed between each permanent magnet and each conductor ring; the permanent magnet cylinder is connected with the output shaft; the spline is connected with the input shaft; the spline hub is connected with the conductor cylinder; and the spline is connected with the spline hub. Compared with the prior art, the device synchronously rotates with other parts, and the conductor cylinder is driven to regulate the flexible power transmission, so that dynamic load interference caused by change of speed difference during regulating of a load device is reduced, and the regulation becomes simple, stable and efficient.

Machine for contactless fixing of a movement degree of freedom, having a primary part and a secondary part, wherein the primary part and the secondary part are designed such that a cogging force when no current is flowing in the machine is at least 50% of the maximum force of the machine.

The invention discloses a flexible electromagnetic coupling torque transmission method for an electric automobile, which belongs to the technical field of modern traffic. The flexible electromagnetic coupling torque transmission method for the electric automobile is characterized in that a current control signal is generated according to parameter information such as current speed, shift and the like in a torque transmission control process after a control module receives a torque transmission command; a driving module gradually increases a break-over electric current of an excitation winding of an outer rotor according to the current control signal; magnetometive force of the excitation winding is gradually increased along with the increment of the break-over electric current; interaction force between a magnetic field of the excitation winding and a magnetic field of a permanent magnet of an inner rotor is gradually increased; a transmitted torque is increased gradually; a driven shaft is stably speeded up until the rotation speeds of a driving shaft and the driven shaft are synchronous; in a torque interrupt control process, after the control module receives a torque interrupt command, the output of the current control signal is interrupted; current output of the driving module is zero; the magnetomotive force of the excitation winding is zero; the electromagnetic connection between the outer rotor and the inner rotor is interrupted; and the transmitted torque is zero. The invention has the following advantages of solving the problems of heat generation by friction and mechanical wear and having high response speed and an overload protection function.

The invention discloses a variable inertia control method and device for a servo system. The device comprises a base, a lifting platform, a motor fixing device, a permanent magnet synchronous motor, a torque sensor, a magnetic powder clutch, an absolute optical encoder, a crank-slider mechanism, a drag platform, pre-tightening bolts and clamp nuts. Through controlling the magnetizing current of a magnetic powder clutch to control disengagement and engagement of the crank-slider mechanism and the permanent magnet synchronous motor and utilizing the absolute optical encoder to measure a position angle of the crank-slider mechanism, the equivalent moment of inertia of a system is computed. According to the method and the device, the inertia mutation and the inertia gradual change of the servo system are both realized.

A magnetic gear arrangement includes: a first gear member for generating a first magnetic field, a second gear member for generating a second magnetic field, and a coupling device which provides an arrangement of interpoles between the first gear member and the second gear member. The interpoles couple the first and second magnetic fields to produce a gearing between the first and second gear members. The first gear member has superconducting magnets or coils for generating the first magnetic field and / or the second gear member has superconducting magnets or coils for generating the second magnetic field.

When, according to the invention, constructing a drive system for rotating the cleaning head in a tank and allowing the system to comprise a hysteresis coupling having two magnetic parts which are present inside the liquid space (4) and outside this, respectively, a completely liquid-tight separation between the housing (2) and the gear (14) may be ensured. The magnetic part (8, 18) of the hysteresis coupling may be formed by electromagnets, and with a displaceable (13) position of the one part relative to the other part (11, 19) the coupling may be adjusted with respect to the transferred torque and / or speed.

An electrical power storage gear transmission is characterized in that the rotating speed of a power source is no longer corresponding with the on-load rotating speed and the torque linearity, which guarantees the utilizing efficiency of the power resource. The gear transmission can stepless regulation transmission ratio matched with the driving force in accordance with the on-load changes and rotating speed requirements, which accomplishes high stepless speed regulation performance, and has extremely broad speed regulation range and excellent torque output. The gear transmission can operate in a plurality of modes, such as the electrical mode, the driving force source mode and the combination mode, which accomplishes proper distribution of energy source between a driving system and an energy-storage system. The gear transmission reduces the quantity of mechanically driving parts, which lowers the friction loss in the mechanically driving operation effectively; and has simple structure, easy control process and lowered cost.

The invention discloses a flat plate magnet collecting type magnetic circuit structure for a permanent magnet synchronous transmission device, and belongs to the technical field of permanent magnet transmission. According to the permanent magnet synchronous transmission device with the flat plate magnet collecting type magnetic circuit structure, magnetic field strength in a magnet collecting type magnetic circuit air gap is enhanced, transmission torque is increased, the appearance size of the transmission device is reduced, and manufacturing cost is lowered. The flat plate magnet collecting type magnetic circuit structure comprises a left rotor and a right rotor, the left rotor is composed of a left rotor plate and even permanent magnet sets, the right rotor is composed of a right rotor plate and even permanent magnet sets, and the permanent magnet sets on the left rotor plate correspond to the permanent magnet sets on the right rotor plate. The permanent magnet sets are all composed of two to five magnets in close contact, the number of the magnets included by the permanent magnet sets in the same magnetic coupling ring is the same, and the magnets are all distributed in the radial directions of the left rotor plate and the right rotor plate. The magnetizing polarity directions of the magnets in the same permanent magnet set are identical. The magnetizing polarity directions of the adjacent permanent magnet sets are opposite.