A fixed magnetic gap permanent magnet speed governor, including a cylindrical conductor rotor and a permanent magnet rotor disposed therein, the permanent magnet rotor includes at least one permanent magnet, two length sides of the permanent magnet are an N pole and an S pole respectively, two magnetic pole end surfaces and two length sides of the permanent magnet are arranged with fixed magnetizers and movable magnetizers respectively, the fixed magnetizers and the movable magnetizers form a closed magnetic loop. Adopting the fixed magnet gap structure improves an engagement area of speed governor and reduces assembling difficulty, saves a rare-earth material, increases a torque transmission capability. The adoption of a magnetic circuit adjustment structure reduces the power consumption of an adjustment execution mechanism, maximally reduces the size of the adjustment execution mechanism, reduces the overall size of the speed governor, reducing material consumption, saving installation space, and facilitating on-site installation.

A device regulating motion of a mechanical horological movement includes: a frame; a resonator attached to the frame and including a first annular magnetic structure including N1 magnets arranged regularly in a circle and a resilient structure; a second annular magnetic structure including N2 magnets defining a central axis about which the structure rotates, N2 being different than N1. The resonator is configured so that a resonant mode in which the first magnetic structure is subject to curvilinear, or substantially circular, translation about the central axis may be excited by rotation of the second magnetic structure. The two magnetic structures define a magnetic cycloid gear such that the regulating device incorporates a reducer of frequency between the resonance frequency and the rotational frequency of the second magnetic structure which is rigidly connected to an escapement wheel.

There is provided a torque device which includes a driving module, a driven module and an adjusting module. The adjusting module comprises a magnetic torque device, wherein an input end of the magnetic torque device is capable of being driven by the driving module, an output end of the magnetic torque device is capable of driving the driven module, the input end and the output end of the magnetic torque device have a variable distance therebetween, and the input end is capable of driving the output end to transfer a torque in operation.

A configurable gear system that includes a set of gear segments; each gear segment of the set of gear segments including a base structure, a gearing surface connected to the base structure and extended along at least one face, and two segment connectors at opposing sides of the gearing surface; and wherein at least a subset of the gear segments interconnect through the gear connector interface into a gearing configuration.

A magnetic coupling device includes a driving magnet array having multiple annular sector-shaped, circumferentially arranged first permanent magnets, and a driven magnet array having multiple circular sector-shaped, circumferentially arranged second permanent magnets with pole surfaces facing pole surfaces of the first permanent magnets. The driven magnet array is rotated by the driving magnet array being rotated. A repulsion zone where a repulsive force acts is designed to have an area that is 5% to 15% of that of an attraction zone where an attractive force acts between a specific first permanent magnet and a specific second permanent magnet, with a radial first centerline of the specific first permanent magnet overlapping a radial second centerline of the specific second permanent magnet so that opposite poles face each other, including between first and second permanent magnets respectively adjacent the specific first and second permanent magnets with overlapping the centerlines.

A lift fan position lock mechanism is disclosed. In various embodiments, a position lock mechanism includes a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure. For each detent, the lock mechanism includes a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent. The lock mechanism further includes a rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position.

A control system (10) for controlling the pitch of a propeller (50), the system comprising a propeller shaft (60), a blade swivel device (20) having a rotary control element (22) suitable for placing the blades (52) in an angular position corresponding to a desired propeller pitch, and a transmission (12) presenting an outlet member coupled in rotation with the rotary control element (22) of the blade swivel device (20).

The transmission (12) includes a variable speed drive (70) having drive, control, and outlet rotors that are coupled in rotation respectively with the propeller shaft (60), with a control member, and with the outlet member of the transmission.

By means of the variable speed drive (70), the speed of rotation of the outlet member of the transmission is a predetermined function of the speeds of rotation not only of the propeller shaft, but also of the control member.

A rotational motor that comprises a stator and a rotor and at least two magnets comprising a permanent magnet and an electromagnet, wherein one of the magnets is attached to the stator and one of the magnets is attached to the rotor. The magnets are relatively aligned such that when the electromagnet is switched off, the permanent magnet is attracted to a ferromagnetic core of the electromagnet causing the rotor to rotate relative to the stator, and when the electromagnet is switched on, the permanent magnet is repelled from the electromagnet causing the rotor to continue to rotate relative to the stator.

A magnetic geared motor (1) includes a stator (30) including a plurality of teeth (31) that produce a magnetomotive force, a first rotor (10) that rotates by the magnetomotive force of the stator (30), and a second rotor (20) that, in response to rotation of the first rotor (10), rotates at a lower speed than the first rotor (10). The first rotor (10), the second rotor (20), and the stator (30) are disposed coaxial to each other, and a plurality of magnets (34) of different polarities are disposed in respective slot openings (31c) present between each two adjacent teeth (31).

An eddy-current braking mechanism including a rotor, rotatable about a rotor axis; at least one electrically conductive member coupled to the rotor for rotation therewith; at least one magnet configured to apply a magnetic field extending at least partially orthogonal to the plane of rotation of the conductive member, and characterised in that upon rotation of the rotor, the conductive member is configured to move at least partially radially from the rotor axis into the applied magnetic field.