97results about "Synchonous clutches/brakes" patented technology

Embodiments of the present invention relate to magnetic gears comprising first and second moveable members arranged to interact in a magnetically geared manner via a first electrical winding arrangement arranged to generate, at least in part, a first magnetic flux having a first number of pole-pairs, and one or more pole-pieces arranged to modulate the first magnetic flux to interact with a second magnetic flux having a second number of pole-pairs, wherein the first number of pole-pairs is less than the second number of pole-pairs.

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.

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.

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.

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 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 lifting hoist (10) having a drive train (14) containing a slip clutch arrangement (23) with a hysteresis clutch (26). The drive train (14) transfers torque, friction-free, in both forward and backward directions of movement between the motor (15) and a gearing (16). The hysteresis clutch (23) forms an unbranched torque transmission path between the motor (15) and the gearing (16). The hysteresis clutch (26) acts as a vibration damper, allows controlled emergency load lowering, and acts as a secure torque limiter in emergency malfunctions when lowering a load. It further can be used as a load indicator by reducing the load-lifting speed before the nominal load is reached or in the event of an overload.

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.