The system includes: a driver; a rotating load configured to be driven into rotation by the driver; a controller, for controllably changing a rotation speed of the load; and a variable speed transmission, arranged between the driver and the load. The variable speed transmission includes a speed summing gear arrangement with a first input shaft, a second input shaft and an output shaft. The output shaft is drivingly coupled to the rotating load. The first input shaft is drivingly coupled to the driver. A continuous variable transmission device is mechanically coupled to the driver and to the second input shaft of the speed summing gear arrangement. The continuous variable transmission device is functionally coupled to the controller.

A generator-gearbox arrangement for a wind turbine includes a generator having a stator and a rotor interacting with one another, a functional component arranged on an end side of the generator and including an extension which points toward the rotor, and a magnetic rail brake arrangement including component parts fastened to the extension. The magnetic rail brake arrangement is designed to apply a braking action which is based on an operating principle of electromagnetic attraction between the magnetic rail brake arrangement and at least one of the rotor and the functional component.

A toothed holding brake for a vehicle door has a shaft, an armature plate, a magnet device and a detection device. The armature plate has a first and second main surfaces arranged opposite one another, wherein an armature-plate toothed rim having a plurality of armature teeth is arranged on the second main surface. The armature plate is arranged in a locking position such that the armature teeth mesh in the carry-along teeth to prevent rotation of the shaft in at least one direction, and is arranged in a release position such that the armature teeth are arranged at a distance from the carry-along teeth to enable rotation of the shaft in both directions. The magnet device has a magnet main surface arranged facing the armature plate, wherein the magnet device is designed to move the armature plate between the locking position and the release position.

Line dispensing devices include a coupling transmission, a retraction mechanism, and a rotor that rotates around a shaft. Rotation of the rotor causes a portion of at least one pivotable member to move into and out of a magnetic field.

Described herein are eddy current brakes and associated methods of their use, particularly configurations that have a kinematic relationship with at least two rotational degrees of freedom used to tune operation of the brake or apparatus in which the brake is located.

Provided is a rotary electric machine including: a permanent magnet rotatable around a first rotational shaft and disposed at a distance from a main surface of a moving body rotating or moving, at least a part of a side surface of the permanent magnet continuous to an outer peripheral surface thereof being opposed to the main surface of the moving body, wherein the permanent magnet is rotated around the first rotational shaft by a reaction force acting on the permanent magnet, the reaction force being caused by eddy currents produced in the main surface of the moving body in such a direction as to hinder a change of magnetic flux from the permanent magnet, and a surface speed of the side surface of the permanent magnet opposed to the moving body is lower than a surface speed of the main surface of the moving body opposed thereto.

Described herein are braking mechanisms and related methods of using eddy current interactions to resist relative movement between members, the magnetic flux about an eddy current region being modified beyond an inherent drag effect resulting from a simple magnetic pole arrangement.

A rail coaster operates as a cross between a roller coaster and a zip line. A rail may be suspended under a frame by flexible cables or solid brackets. The rail may turn, incline, decline, or twist, but need not twist to still provide a “rolling” degree of freedom for a rider. An eddy current brake provides proportional braking as a function of speed. A cam-adjustment-axle (eccentric) carries certain wheels to provide finely divided, discrete, but incrementally small adjustments of idler wheel clearances to accommodate variations in the rail, wheel wear, and onsite adjustment of tolerances for curvature, unevenness, and friction. A “static universal” bracket provides adjustment in four degrees of freedom, three of translation and one of rotation in securing a rail to a supporting frame.

A magnetic force reducer is mounted on a holder having a belt and contains: a drive shaft, multiple rotators, and a magnetic conduct ring. The drive shaft is configured to rotate a rotatable disc, and the rotatable disc has multiple rotation segments and multiple first support portions. The multiple rotators are rotatably connected on two surfaces of the rotatable disc in parallel. A respective one rotator includes a swing arm rotatably connected with a respective one rotation segment and having a conductive rotation element and a second support portion. A resilient element is connected between the second support portion and a respective one first support portion of the rotatable disc. The magnetic conduct ring is fitted around the conductive rotation element of the respective one rotator to produce a magnetic field.

A channel segment for a track of a mover device is provided, the channel segment comprising: opposite ends joined by a body forming a magnetic flux pathway between the opposite ends, the magnetic flux pathway being one or more of C-shaped, U-shaped and horseshoe shaped between the opposite ends, the opposite ends forming respective transverse magnetic flux pathways about perpendicular to the magnetic flux pathway; laminations of ferromagnetic material forming the body, the laminations about parallel to the magnetic flux pathway and about perpendicular to the respective transverse magnetic flux pathways; shear pins through the laminations, the shear pins positioned to reduce eddy currents one or more of in and around the shear pins; and a retention mechanism at the opposite ends, the retention mechanism configured to transversely fasten the laminations together at the opposite ends while remaining insulated from each other.