A damping mechanism may comprise a housing, a shaft, a spring arm assembly including a first spring arm, wherein the spring arm assembly is coupled to the shaft and configured to rotate in response to a rotation of the shaft, wherein the first spring arm extends relatively radially outward of the spring arm assembly toward the housing in response to the rotation of the shaft, and wherein the rotation of the shaft is damped in response to extending the first spring arm.

Described herein is an assembly and methods of use thereof for controlling or governing the relative speed of motion between the assembly parts via eddy current formation. The assembly and methods also may minimize the number of parts required and may minimize the number of moving parts thereby increasing the mechanical durability of the assembly compared to art designs that may have more moving parts and greater part complexity

A cylindrical part of a rotor for an eddy current deceleration device of the present embodiment has a chemical composition consisting of, by mass %, C: 0.05 to 0.15%, Si: 0.10 to 0.40%, Mn: 0.50 to 1.00%, P: 0.030% or less, S: 0.030% or less, Mo: 0.20 to 1.00%, Nb: 0.020 to 0.060%, V: 0.040 to 0.080%, sol. Al: 0.030 to 0.100%, B: 0.0005 to 0.0050%, N: 0.003 to 0.010%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Cr: 0 to 0.10%, and the balance: Fe and impurities, and in which the total area fraction of martensite and bainite in a microstructure is more than 95.0%, and the number density of carbides having an equivalent circular diameter of 100 to 500 nm is 0.35 to 0.75 particles/μm.sup.2.

A motor may include a rotor and a stator. The stator may include first and second stator assemblies. Each stator assembly may include a coil wound around a tube-shaped body part of a bobbin comprising a terminal block; and first and second stator cores disposed on opposite sides of the coil. The first stator cores of the first and second stator assemblies are welded together at outer peripheries of the first stator cores of the first and second stator assemblies. The welded portion may be covered by the terminal block of one of the first stator assembly or the second stator assembly on an outer side in the radial direction with a predetermined space between the welded portion and the terminal block.

An internal magnetic resistance system for use with a fitness device includes an axle, inertia wheel, transmission wheel, magnetic permeable ring and electromagnet. The inertia wheel is disposed at the axle and has a protruding ring portion. The transmission wheel connects to the inertia wheel and transfers an external force to the inertia wheel to cause the inertia wheel to rotate. An outer circumferential surface of the magnetic permeable ring is fixedly disposed on an inner circumferential surface of the protruding ring portion such that the magnetic permeable ring rotates together with the inertia wheel. The electromagnet is disposed in the protruding ring portion and surrounded by the magnetic permeable ring. The electromagnet has a support fixedly disposed at the axle and iron cores disposed at the support. Each said iron core is surrounded by a coil and separated from the magnetic permeable ring by a gap.

A retarder-equipped rotating electrical machine includes a rotor, a stator, and a retarder rotor. The stator has teeth at regular intervals in a circumferential direction. One ends of the teeth are disposed to face the rotor. The retarder rotor has a magnetic member continuously in the circumferential direction. The retarder rotor is disposed to face the other ends of the teeth of the stator and configured to rotate integrally with the rotor. A rotor-to-stator pole piece portion having pole pieces at regular intervals in the circumferential direction is disposed between the rotor and the stator. A stator-to-retarder rotor pole piece portion having pole pieces at regular intervals in the circumferential direction is disposed between the stator and the retarder rotor. Both pole piece portions are moved in the circumferential direction to switch between an operation as a motor or generator and an operation as a retarder.

A magnetic control device for directly sensing the motion load value especially the one that has a magnetic resistance mechanism which is “floating” and pivoted on the inner edge of the outer ring body of a flywheel; an acting rod, one end of is locked on the outside of the magnetic resistance mechanism and synchronized with it, and the other end has a pressure applied member connected to the beam load cell; a torque value conversion unit for converting the load value of the beam load cell into a torque value; so as to achieves directly measuring the motion load value, which has the effect of improving the detection accuracy.

UPS machine comprising a synchronous machine (9) coupled to an accumulator (10) of kinetic energy, which accumulator essentially comprises: a body (12) with a main shaft; a hollow drum (18) able to rotate about the axle; a pony motor, for starting the drum (18); a rotor (20) fastened to the main shaft coaxially with the drum (18), which is equipped with coils (24) in order to electromagnetically couple the drum (18) and the rotor (20); characterised in that: the rotor (22) comprises a core (21) made of iron with a certain number of poles (22) that are delineated by notches (23) parallel to the main shaft (11) and that are distributed around the circumference of the core (21) which, for each poll (22), is provided with a winding (24) wound in the notches (23) around the pole (22) in question; the cumulative width of all of the poles (22) in the narrowest portion thereof is at least equal to the cumulative width.

Described herein is an assembly and methods of use thereof for controlling or governing the relative speed of motion between the assembly parts via eddy current formation. The assembly and methods also may minimize the number of parts required and may minimize the number of moving parts thereby increasing the mechanical durability of the assembly compared to art designs that may have more moving parts and greater part complexity.

A coaxial double-rotor variable-speed electromagnetic drive includes an external rotor, an end cover, a load shaft, a stator, and an internal rotor, the external rotor, the load shaft, the stator, and the internal rotor being coaxially arranged. The end cover includes a first end cover and a second end cover that are respectively disposed at two ends of the drive, the external rotor is slidably connected to the two end covers separately by bearings, the load shaft is slidably connected to the first end cover and the inner side of the external rotor separately by bearings, the stator is fixed on the inner side of the first end cover and disposed inside the external rotor, air gaps are kept separately between the stator and the internal rotor and between the stator and the external rotor, the internal rotor is sleeved on the load shaft and is disposed inside the stator.