The present invention relates to a power transmission apparatus using a magnetic field, the power transmission apparatus comprising a rotor module, a front driver module and a rear driver module, or comprising a rotor module and any one of a front driver module and a rear driver module. The power transmission apparatus generates, using power received from a power applying driving body or power received from a power receiving driving body, rotational power from a combination of an induced magnetic field which the front driver module generates, a rotating magnetic field which the rotor module generates, and a rotating magnetic field which the rotor module generates together with the front driver module and the rear driver module, and acceleratedly rotates to increase the rotational power, thereby transmitting power to the power receiving driving body and to a target object.

Disclosed are a brake apparatus, a wheel body assembly, and a rollator. The brake apparatus comprises a shaft body, a housing, a magnetic induction mechanism and an adjustment mechanism. The housing rotates relative to the shaft body; the magnetic induction mechanism is arranged in the housing to generate resisting force opposite to a rotation direction of the housing or the shaft body to the housing or the shaft body by a magnetic field reaction when the housing rotating relative to the shaft body. The adjustment mechanism is connected to the magnetic induction mechanism for adjusting a magnitude of the resisting force. The magnetic induction mechanism is capable of playing a braking role on the wheel body integrated or connected with the brake apparatus, because its braking force is related to the rotation of the housing or shaft body, rather than friction braking, it will not produce an emergency stop effect.

A magnetic type rotation transmitting mechanism has a rotating plate made of a magnetic material, and a magnet to which the rotational movement of the rotating plate is transmitted through a magnetic coupling between the magnet and the rotating plate. When the rotating plate is rotated, a plurality of oblique edge portions formed on the outer peripheral edge of the rotating plate rotate while sequentially passing through a magnet-facing area. The oblique edge portions move in the direction of the rotation centerline of the rotating plate, the rotation centerline being perpendicular to the center axis line of the magnet. The magnet is rotated about the center axis line by a magnetic force occurring between the magnet and the oblique edge portions passing through the magnet-facing area. It is possible to realize a small and compact mechanism for extracting rotation.

A method and a driveline are used for stabilization of an electrical grid. The driveline for an electricity generator includes a controllable power unit, such as a gas motor or a gas turbine. A generator generates electrical power. The generator is connectable to the electrical grid for feeding electrical power into the electrical grid. A torque limiting coupling is arranged in the driveline between the generator and the power unit. To limit the torque, the torque limiting coupling is caused to slip and a limited torque is provided to the generator.

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.

An actuation device for a clutch device is provided having a magnetic field brake with a brake stator and a brake rotor. This magnetic field brake can be operated as an eddy-current brake and/or as a hysteresis brake.

The present invention relates to a power transmission apparatus using a magnetic field, the power transmission apparatus comprising a rotor module, a front driver module and a rear driver module, or comprising a rotor module and any one of a front driver module and a rear driver module. The power transmission apparatus generates, using power received from a power applying driving body or power received from a power receiving driving body, rotational power from a combination of an induced magnetic field which the front driver module generates, a rotating magnetic field which the rotor module generates, and a rotating magnetic field which the rotor module generates together with the front driver module and the rear driver module, and acceleratedly rotates to increase the rotational power, thereby transmitting power to the power receiving driving body and to a target object.

Disclosed are an electromagnetic brake mechanism a baitcasting reel and a fishing tackle. The electromagnetic brake mechanism includes a line reel; a magnet assembly including a magnetic ring and at least one coil, the magnetic ring sleeving a rotating shaft of the line reel and including a plurality of magnets arranged in a Halbach array; and a brake control circuit connected with the at least one coil to form a closed loop with the at least one coil according to the rotating speed of the line reel so as to generate an induced electromagnetic field and then form a braking force inhibiting the rotation of the line reel. The size of the magnetic ring can be reduced under the same intensity of the magnetic force, so that the overall weight of the line reel is reduced, and the use experience of a user is improved.

Systems and devices are described for controlling equipment of a vehicle using a magnetic hysteresis assembly. The assembly preferably comprises a first plate having a hysteresis material and a second plate having a set of permanent magnets or an electromagnet. One or more mechanical clutches can be used to limit rotation of the hysteresis material with respect to the permanent magnets or the electromagnet. In this manner, elastic recall of the device can be limited or prevented due to the limitation in rotation of the first and second plates.