Various embodiments provide a system for moving optical elements. The system includes a first rotor and a second rotor configured to rotate in opposite directions. The system further includes a first plurality of paddles coupled to the first rotor, each of the plurality of paddles having an aperture configured to receive a first optical element, and a second plurality of paddles coupled to the second rotor, each of the plurality of paddles having an aperture configured to receive a second optical element. The first rotor and the second rotor are configured to move the first optical element between a retracted position and a desired position and to move the second optical element between the desired position and a retracted position substantially simultaneously such that a reaction torque of the first rotor cancels a reaction torque of the second rotor.

Various embodiments provide a system for moving optical elements. The system includes a first rotor and a second rotor configured to rotate in opposite directions. The system further includes a first plurality of paddles coupled to the first rotor, each of the plurality of paddles having an aperture configured to receive a first optical element, and a second plurality of paddles coupled to the second rotor, each of the plurality of paddles having an aperture configured to receive a second optical element. The first rotor and the second rotor are configured to move the first optical element between a retracted position and a desired position and to move the second optical element between the desired position and a retracted position substantially simultaneously such that a reaction torque of the first rotor cancels a reaction torque of the second rotor.

Embodiments described include a electrical linear motor comprising a stator and an actuation shaft movable in a linear axial direction with respect to the stator. The stator comprising a casing, an electromagnet array mounted in the casing. The electromagnet array comprising a central orifice extending in the linear axial direction within which the actuation shaft extends. The actuation shaft comprising a permanent magnet arrangement comprising a plurality of magnetic pole segments. The electromagnetic array comprising a plurality of electromagnets to generate a magnetic field that in conjunction with the magnetic field of the permanent magnet arrangement generates an electromotive force between the stator and actuation shaft having a component in the axial direction to drive the actuation shaft relative to the stator.

A linear generator for generating electrical power from momentum of a vehicle, comprises a moving part and a stator. The moving part is a powered vehicle moving along a defined path and the stator is built along the defined path. Examples are trains and elevators, and the linear generator may be used to help with braking and at the same time prevent waste of the energy from the vehicle momentum.

A linear generator for generating electrical power from momentum of a vehicle, comprises a moving part and a stator. The moving part is a powered vehicle moving along a defined path and the stator is built along the defined path. Examples are trains and elevators, and the linear generator may be used to help with braking and at the same time prevent waste of the energy from the vehicle momentum.

An electric motor and a method for manufacturing an electric motor capable of improving rotation balance of an armature and realizing effective brake braking with a simple configuration are provided. In an electric motor including an armature core having a plurality of teeth and teeth within a yoke, a winding wound between the slots, and a commutator having and a plurality of segments to which the winding is connected, the winding has a main winding that applies a rotational force to the armature core and a brake winding that applies a braking force to the armature core, and an H bridge circuit is built between the winding and a power supply, and the main winding and the brake winding of the winding are disposed at positions for adjusting balance when the armature core rotates.

An electronically commutated direct current motor made up of a cylindrically shaped non-ferrous stator winding; a cylindrically shaped, magnetically conductive back iron arranged radially outside of the stator winding; and a cylindrically shaped permanent magnet rotor arranged concentrically within the stator winding, wherein the magnetically conductive back iron has different magnetic conductivities over its circumference.

An electronically commutated direct current motor made up of a cylindrically shaped non-ferrous stator winding; a cylindrically shaped, magnetically conductive back iron arranged radially outside of the stator winding; and a cylindrically shaped permanent magnet rotor arranged concentrically within the stator winding, wherein the magnetically conductive back iron has different magnetic conductivities over its circumference.

The present invention relates to a motor, in particular to a motor allowing for quick shutdown. A motor allowing for quick shutdown includes an enclosure, an end cover, a rotor, a magnet ring and a metal ring. The metal ring is made of permanent magnet material, and the magnet ring and the metal ring are adjacent to each other and can interact magnetically with each other. Several magnetic poles, of which N poles and S poles are staggered in the circumferential direction of the magnet ring, are formed on adjacent end faces or circumferential surfaces of the magnet ring and the metal ring. One of the magnet ring and the metal ring is coaxially fixed to the rotor, while the other one is fixed to the enclosure or the end cover. The present invention has the advantages that there is no dust caused by friction, which can effectively avoid the risk of motor jammed or shortened service life, and the motor can achieve quick shutdown and output a constant magnetic damping torque when in use.

The present invention relates to a motor, in particular to a motor allowing for quick shutdown. A motor allowing for quick shutdown includes an enclosure, an end cover, a rotor, a magnet ring and a metal ring. The metal ring is made of permanent magnet material, and the magnet ring and the metal ring are adjacent to each other and can interact magnetically with each other. Several magnetic poles, of which N poles and S poles are staggered in the circumferential direction of the magnet ring, are formed on adjacent end faces or circumferential surfaces of the magnet ring and the metal ring. One of the magnet ring and the metal ring is coaxially fixed to the rotor, while the other one is fixed to the enclosure or the end cover. The present invention has the advantages that there is no dust caused by friction, which can effectively avoid the risk of motor jammed or shortened service life, and the motor can achieve quick shutdown and output a constant magnetic damping torque when in use.