A magnetic coupling includes an inner rotor (11) and an outer rotor (9) which at least partly surrounds the inner rotor (11). These rotors (11, 9) each are formed of magnetic material (18) and are coupled to one another by way of magnetic forces. The inner rotor (11) and/or the outer rotor (9) contain powdery, magnetizable material (18). The powdery, magnetizable material (18) is magnetized at a side lying opposite the other rotor at several locations distributed over the periphery.

The present invention relates to electric motors and generators. In particular, it describes a system for exploiting the reaction force in order to increase the efficiency of motors by reducing the energy consumption, wherein both the stator and the rotor contain a shaft, allowing them both to rotate. The system for increasing efficiency of the present invention can be applied to electric motors and comprises: at least one motor (1) having a rotor element (1.1) and a stator element (1.2); at least one transmission element (3); at least one lift element (4); and at least one rotating shaft (2). The invention also relates to a method for exploiting the reaction force and increasing the efficiency of motors.

A personal escape device includes a main housing, a shaft, a magnet housing, and a plurality of magnets. The shaft is rotatably coupled with the main housing and is rotatable about a rotational axis. The magnet housing is positioned in the main housing and is coupled with the shaft such that the magnet housing rotates together with the shaft. The plurality of magnets is coupled with the magnet housing such that the plurality of magnets rotates together with the magnet housing. The stator assembly is coupled with the main housing and surrounds the magnet housing. The stator assembly and the magnet housing are radially spaced from each other to define an air gap therebetween.

The invention relates to a device (1) for generating electrical energy from a rotational movement, comprising a stator (3) which can rotate about a rotational axis and a rotor (4) which can rotate about the rotational axis (2) and is connected to the stator (3), which rotor comprises a centre of gravity (5) located outside the rotational axis (2), wherein in the stator (3) a coil is arranged for inducing an electrical voltage when the stator (3) is rotated relative to the rotor (4), wherein an electrical circuit (7) is connected to the coil, said circuit comprising an energy store (6) for rectifying the voltage induced in the coil. In order to achieve a maximum energy yield under various conditions of use, according to the invention, the device (1) is configured to detect a position of a plane defined by the rotational axis (2) and the centre of gravity (5) of the rotor (4) and to influence the position of the plane by means of a current flow through the coil, so that a deflection of the plane from the vertical can be limited by the current flow during a rotation of the stator (3). The invention also relates to a use of a such a device (1).

This disclosure describes embodiments of novel line dispensing devices and methods for dispensing and retracting a line of a line dispensing device.

A rotor of an electrical rotating machine includes a first rotor core, a second rotor core which overlaps the first rotor core in an axial direction, a non-magnetic substance layer which is interposed between the rotor cores, and a plurality of permanent magnet portions which are embedded in each rotor core. Each of the rotor cores includes a plurality of flux barrier portions and a plurality of effectual magnetic flux portions which are alternately arranged on an outer circumferential surface thereof. The flux barrier portion of the first rotor core overlaps both of a portion of the flux barrier portion of the second rotor core and a portion of the effectual magnetic flux portion of the second rotor core in the axial direction such that, in the adjacent rotor cores, the effectual magnetic flux portions do not overlap each other in the axial direction.

A water dispenser for pets includes a water tank for receiving a liquid, a drainage assembly arranged in the water tank, a fan blade rotatably received in the drainage assembly for driving the liquid in the water tank to flow out through the drainage assembly, and a driving assembly arranged outside the water tank and configured for driving the fan blade to rotate through magnetic force.

An inertia flywheel assembly and a system thereof are disclosed. The system includes a driving device, an inertia flywheel assembly, a transmission member, a flywheel monitor unit, an abort unit and at least one output device. The inertia flywheel assembly comprises a first inertia flywheel and at least one second inertia flywheel, each inertia flywheel has a flywheel body and an axle, the axle is fixed to the axis of the flywheel body, and the flywheel body could spin via the axle. The flywheel body is a streamlined body. A first transmission portion is disposed on the circumference of the flywheel body of the first inertia flywheel. A second transmission portion is disposed on the axle of each second inertia flywheel. The second transmission portion is coupled to the first transmission portion. The output device is coupled to the axle of the second inertia flywheel.

An energy conversion assembly including an input shaft coupled to a first annular gear through a first direction limiting device configured to allow rotation of the first annular gear in a first direction and substantially inhibit rotation of the first annular gear in a second direction. The input shaft may be coupled to a second annular gear through a second direction limiting device configured to allow rotation of the second annular gear in the second direction and substantially inhibit rotation of the second annular gear in the first direction. The assembly may include a first transmitting gear engaged with the first annular gear, a second transmitting gear engaged with the second annular gear, a conversion gear operatively coupled to the second transmitting gear, and a transmitting shaft coupled to the first transmitting gear and the conversion gear.

Various embodiments include systems and methods pertaining to a counter-rotating alternator arrangement that may be used to generate electrical energy. In various embodiments, the counter-rotating alternator arrangement may include a plurality of shafts, an alternator assembly, and a rotatable coupling arrangement. According to some embodiments, the rotatable coupling arrangement may include coupling components that are rotatably mated with one another such that a first shaft and a second shaft are aligned along an axis and extend in opposite directions from the rotatable coupling arrangement. The alternator assembly may include multiple rotors, and the counter-rotating alternator arrangement may be configured to rotate a first rotor and a second rotor in opposite rotational directions relative to one another, in accordance with various embodiments.