An axial displacement amplified eddy current damper is disclosed. The axial movement of a slide bar is converted into the rotation of copper sheets and generates eddy current for energy consumption. The copper sheets are rotated and amplified by adjusting the sizes of gears. The short displacement of the slide bar can cause a large angle rotation of the copper sheets, so that energy consumption efficiency is high. The damping parameter can be adjusted by adjusting the magnetic field strength of permanent magnets, the thickness of the copper sheets and the distance from the copper sheets to the permanent magnets. The permanent magnets are adopted to provide continuous magnetic field sources, without external energy, thereby generating long-term and stable vibration reduction effect.

An automatic descent control device includes a line configured to be attached to a load. A line system retracts slack from the line when the line is not loaded and extends the line when the line is loaded. At least one braking system provides a braking force when the line is loaded so as to control extension of the line and a descent rate of the load. The at least one braking system is operable in at least two configurations, a first configuration that the at least one braking system lowers the load at a first descent rate, and a second configuration that the at least one braking system lowers or locks the load at a second descent rate. The load being a constant and the first descent rate is greater than the second descent rate.

A decelerating apparatus includes a brake member, primary and secondary permanent magnets and pole pieces. The primary permanent magnets are arranged in a circumferential direction to face an inner or outer peripheral surface of the brake member with a gap in between. Each of the primary permanent magnets has two opposite magnetic poles arranged in a radial direction. The secondary permanent magnets and the pole pieces are placed in the gap and arranged in the circumferential direction. Each of the secondary permanent magnets has two opposite magnetic poles arranged in the circumferential direction. Each of the pole pieces is positioned between adjacent secondary permanent magnets. Magnetic pole arrangements of adjacent primary permanent magnets are opposite to each other. Magnetic pole arrangements of adjacent secondary permanent magnets are opposite to each other. Each of the secondary permanent magnets has a trapezoidal cross-sectional shape including an upper base and a lower base.

An eddy current braking system for a wheel of a vehicle, the vehicle including a chassis and the wheel being rotatably mounted to the chassis, the wheel including a wheel rim made of an electrically-conductive material and extending annularly around a wheel cavity, the system comprising: a magnetic field generating member secured to the chassis and disposed annularly within the wheel cavity and proximal to the wheel rim, the magnetizable member being operable for generating a magnetic field towards the wheel rim to generate eddy current within the wheel rim upon rotation of the wheel; and a magnetic field controller operatively connected to the magnetic field generating member for selectively controlling an intensity of the magnetic field applied by the magnetic field generating member on the wheel rim.

A turning device for a turbomachine comprises a plurality of electromagnets connectable to an electric power source; a rotor magnetically coupled with the electromagnets, connectable to a main shaft of the turbomachine and having a rotation axis, the electromagnets are arranged facing the rotor in order to induce eddy currents on a surface of the rotor and apply a torque to the rotor, thus rotating the main shaft.

An indoor exercise bicycle is disclosed having a magnetic brake. The magnetic brake system has a pair of parallel arms that moves along a track in a radial direction relative to the axis of the flywheel.

By means of the system described, the use of eddy current generators on vehicles, especially bicycles, can be simplified by easier integration into standardized components such as brake pads, making them more suitable for everyday use. The problem of overcoming the magnetic holding forces at low speeds is essential for cyclists, as these would otherwise rule out the use of such systems in everyday traffic due to the lack of power generation when starting off at low speed. The integration into brake pads provides a significant advantage, as a new functionality is achieved without the need for additional components. The claimed additional functions for signalling contribute to increased traffic safety, especially for two-wheel traffic.

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.

The invention relates to an autonomous retarder system for a vehicle including a retarder (10) having a central rotor (11) and two stators (12), one on each side of the rotor (11). The rotor (11) is rigidly coupled to an axle (1). A generator (20, 30, 50) is also included, coupled to the retarder (10), for supplying same with electrical energy. In addition, the generator (20, 30, 50) comprises a stator (22) and a rotor (21, 31, 51) coupled to the retarder.

An eddy current brake 10 for a vehicle 100, the eddy current brake 10 comprising a rotor 12, and an electromagnet 14 arranged to receive current from an electromechanical energy generating means 16 during braking of the vehicle 100 and to induce an eddy current within the rotor 12.