An actuator includes housing having a reciprocation axis, drive gear configured to couple to the motor, and electromagnetic clutch configured to couple to the motor and coupled to the drive gear. The clutch engages first and second clutch plates responsive to being powered and disengages the clutch plates responsive to not being powered. Actuator includes a ball screw including a nut and a threaded shaft. The nut is coupled to the drive gear and rotation of the drive gear induces rotation of the nut about the reciprocation axis. Rotation of the nut induces motion of the threaded shaft along the reciprocation axis. Actuator includes a fluid damper having a piston coupled to the threaded shaft and disposed within a chamber containing a fluid. Piston includes a port that couples a first chamber portion to a second chamber portion. A brake assembly limits rotation of the nut responsive to the assembly being engaged.

An actuator includes housing having a reciprocation axis, drive gear configured to couple to the motor, and electromagnetic clutch configured to couple to the motor and coupled to the drive gear. The clutch engages first and second clutch plates responsive to being powered and disengages the clutch plates responsive to not being powered. Actuator includes a ball screw including a nut and a threaded shaft. The nut is coupled to the drive gear and rotation of the drive gear induces rotation of the nut about the reciprocation axis. Rotation of the nut induces motion of the threaded shaft along the reciprocation axis. Actuator includes a fluid damper having a piston coupled to the threaded shaft and disposed within a chamber containing a fluid. Piston includes a port that couples a first chamber portion to a second chamber portion. A brake assembly limits rotation of the nut responsive to the assembly being engaged.

A fluid monitoring apparatus for deployment within a pipe arrangement, includes a measurement device configured to measure data indicative of a fluid property, and an energy harvesting system including a turbine configured to be rotated by a flow of fluid through the pipe arrangement, and a generator coupled to the turbine and configured to generate electrical energy. The fluid monitoring apparatus is configured to use the electrical energy to power the measurement device.

A fluid monitoring apparatus for deployment within a pipe arrangement, includes a measurement device configured to measure data indicative of a fluid property, and an energy harvesting system including a turbine configured to be rotated by a flow of fluid through the pipe arrangement, and a generator coupled to the turbine and configured to generate electrical energy. The fluid monitoring apparatus is configured to use the electrical energy to power the measurement device.

A rotating device 1 according to the present application includes a motor 3, a gear 5 that transmits rotation of the motor 3 to an external device, and a sensor 7. The sensor 7 includes a sensor part 70 and a housing 72 that accommodates the sensor part 70. The sensor part 70 is capable of detecting a rotational speed or a rotational angle of the gear 5. The gear 5 includes a recess 50 in a rotational axis direction of the gear 5. The recess 50 accommodates a part of the housing 72.

A gear system connected to a motor, the motor including a motor shaft, a motor housing, and a motor flange, is provided. A first gear is attached to an axially lower end of the motor shaft. A second gear is attached to an axially upper end of a fixed shaft, the second gear meshing with the first gear and being rotatable with respect to the fixed shaft. A pivot shaft is directly or indirectly attached to the axially upper end of the fixed shaft, the pivot shaft being at least partially fixed in a third through-hole of a motor flange.

A drive transmission device includes a drive-side rotatable body, a plurality of magnetic conducting portions and a driven-side rotatable body. The drive-side rotatable body includes a plurality of magnetic poles arranged in a rotational direction. The magnetic conducting portions are magnetizable by the magnetic poles of the drive-side rotatable body. The driven-side rotatable body has a plurality of magnetic poles configured to be rotated in response to rotation of the magnetic poles of the drive-side rotatable body through the magnetic conducting portions. The drive transmission device is configured to be operated as a magnetic speed changer that changes a speed of rotation between the drive-side rotatable body and the driven-side rotatable body by differently setting the number of the magnetic poles of the drive-side rotatable body, the number of the magnetic conducting portions and the number of the magnetic poles of the driven-side rotatable body from each other.

A drive transmission device includes a drive-side rotatable body, a plurality of magnetic conducting portions and a driven-side rotatable body. The drive-side rotatable body includes a plurality of magnetic poles arranged in a rotational direction. The magnetic conducting portions are magnetizable by the magnetic poles of the drive-side rotatable body. The driven-side rotatable body has a plurality of magnetic poles configured to be rotated in response to rotation of the magnetic poles of the drive-side rotatable body through the magnetic conducting portions. The drive transmission device is configured to be operated as a magnetic speed changer that changes a speed of rotation between the drive-side rotatable body and the driven-side rotatable body by differently setting the number of the magnetic poles of the drive-side rotatable body, the number of the magnetic conducting portions and the number of the magnetic poles of the driven-side rotatable body from each other.

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.

A hybrid axle assembly that includes a housing assembly, a differential assembly received in the housing assembly, and an inside-out motor. The differential assembly is rotatable about a differential axis and has a differential input and a pair of differential outputs. The inside-out motor has a stator, which is fixedly coupled to the housing, and a rotor. The stator is disposed circumferentially about the differential input. The rotor is disposed circumferentially about the stator such that the stator is disposed radially between the differential input and the rotor. The rotor is drivingly coupled to the differential input.