An electric-powered vehicle includes: an axle body that includes an axle and drive wheels connected to both ends of the axle; a magnetic geared motor for rotating the axle, the magnetic geared motor including a stator, a low-speed rotor, and a high-speed rotor; a vehicle structure supported by the axle body; a motor support for connecting the vehicle structure and the stator, and supporting the magnetic geared motor by the vehicle structure; and an elastic coupling for coupling the low-speed rotor and the axle such that a rotational force of the low-speed rotor is transmittable to the axle.

A magnetic pole piece device, which is disposed between an inner diameter side magnet field and an outer diameter side magnet field of a magnetic gear, includes a plurality of magnetic pole pieces disposed at intervals in a circumferential direction of the magnetic gear. Each of the plurality of magnetic pole pieces includes a plurality of plate-shaped electrical steel sheets having a longitudinal direction. The plurality of electrical steel sheets are laminated along the circumferential direction, with the longitudinal direction being along an axial direction of the magnetic gear.

A quick-connection type magnetic transmission apparatus for use in a medical interventional instrument, comprising a drive-side housing and a driven-side housing. The drive-side housing and the driven-side housing are coaxially arranged and are connected in a nested mode; a magnetic coupling structure, a magnetic coupling and coaxial guiding mechanism, and an integral coaxial guiding mechanism are sequentially comprised from inside to outside; the magnetic coupling structure consists of a magnetic transmission drive end (12), a magnetic transmission driven end (11), and a quick-connection separation sleeve (13); the magnetic coupling and coaxial guiding mechanism consists of a magnetic coupling and guiding sleeve (21) and a magnetic coupling and guiding groove (22); the integral coaxial guiding mechanism consists of a coaxial guiding sleeve (31), a coaxial guiding groove (32), and a coaxial locking structure. The quick-connection type magnetic transmission apparatus for use in the medical interventional instrument uses a double guiding-locking fit structure, achieves quick connection, and ensures a minimal transmission gap.

A hysteresis clutch including a first rotor with magnets that are polarized in opposite directions in pairs in a circumferential direction and between which pole pieces are provided for deflecting the magnetic flux in the radial direction and a second rotor of the hysteresis clutch has a series of second permanent magnets that extend in the circumferential direction and which are arranged on a circle that is concentric to the rotational axis A, the number of the first magnets and the number of the second magnet are configured such that a smooth torque curve is achieved which is free of a detent torque or at least has a low detent torque.

A permanent magnet speed governor having a fixed magnetic gap. The permanent magnet speed governor includes an outer magnetic rotor and an inner magnetic rotor, at least two outer permanent magnets being evenly distributed along the circumferential direction of the inner circumferential surface of the outer magnetic rotor, the magnetic poles of the outer permanent magnets being arranged along the radial direction, the magnetisms of exposed magnetic pole surfaces of two adjacent outer permanent magnets being different. At least one rotatable permanent magnet is distributed along the circumferential direction of the outer circumferential surface of the inner magnetic rotor, the rotatable permanent magnet being cylindrical and the N pole and the S pole being along the diametrical direction, one end of the rotatable permanent magnet being provided with a magnetic circuit regulator. It increases the engagement area of the speed governor.

A magnetic coupling assembly includes a rotatable male coupling member, a rotatable female coupling member, a static separation member, a first channel, a second channel, a third channel, and a magnetic coupling section of the static separation member, wherein the magnetic coupling section is a section of the static separation member. The rotatable female coupling member and the rotatable male coupling member are rotatably coupled by magnets through the magnetic coupling section. The first channel, the second channel, and the third channel contain fluid forced to flow through the first, second, and third channels for cooling and rotodynamic stabilization.

Magnetic transmissions and related methods are described. In one embodiment, an apparatus includes a magnetic screw comprising an elongate body, a nut selectively magnetically coupled to the magnetic screw, and a potential energy storage system and/or a resistive force component. The nut is configured to be displaced relative to the elongate body in a first direction in response to manipulation of a magnetic field between the magnetic screw and the nut when the nut is magnetically coupled to the magnetic screw. In embodiments including a potential energy storage system, the potential energy storage system may store potential energy when the nut is displaced in the first direction. In embodiments including a resistive force component, the resistive force component may resist motion of the nut in the first direction by applying a resistive force to the nut at least partially in an opposing second direction.

A magnetically-coupled torque assist apparatus includes a movable (rotor) magnet configured to rotate about a rotor magnet axis extending through the rotor magnet, and a stationary (stator) magnet. The rotor magnet and the stator magnet have a gap therebetween. There is an equilibrium state position (ESP) of the rotor magnet where forces acting on the rotor magnet are balanced such that the rotor magnet is stationary about the rotor magnet axis. And when the rotor magnet is rotated from the equilibrium state position (ESP) to an elastically stressed state position (SSP), magnetic fields of the rotor magnet and the stator magnet generate a resultant magnetic force on the movable magnet that biases the movable magnet towards the equilibrium state position. In some embodiments, the stator and rotor magnets are configured to create a Halbach-effect magnetic field bloom, which contributes to the magnetic forces.

A valve actuator includes: a housing, a motor that is disposed in the housing and that includes a motor shaft, a drive gear coupled to the motor shaft, a transfer gear that engages with the drive gear and that is configured to, based on the drive gear rotating, be rotated according to a predetermined gear ratio, an output shaft disposed in the housing, an output gear that is coupled to the output shaft and that engages with the transfer gear, and a stopper that is disposed in the housing and that is configured to control a rotation radius of the output gear. The transfer gear comprises an inner part, an outer part disposed at an outside of the inner part, a first magnet disposed at the outer part, and a second magnet that is disposed at the inner part and that faces the first magnet.

Described herein is a system, method of use and Self Retracting Lifeline (SRL) apparatus using a system that governs a dynamic response between members causing a halt in relative motion between the members. Magnetic interactions, eddy current drag forces and centrifugal and/or inertial forces may provide various mechanisms of governing movement.