An electromagnetic braking assembly for maintaining an actuator shaft in position, and methods for utilizing the same, are provided. The actuator shaft may include an object, e.g., an imaging lens, which is movable in accordance with movement of the shaft. The braking assembly may include a braking coil to which electricity may be applied to produce a magnetic field, a braking magnet capable of changing position as it interacts with the magnetic field, and a braking spring coupled with the magnet such that the spring changes position as the magnet changes position. When the braking spring is in one position, the spring exerts pressure on the actuator shaft substantially preventing the shaft from engaging in linear movement and thus maintaining the shaft in position. When the actuator shaft is in another position, the braking spring does not exert pressure on the shaft permitting the shaft to engage in linear movement.

An electromagnetic braking assembly for maintaining an actuator shaft in position, and methods for utilizing the same, are provided. The actuator shaft may include an object, e.g., an imaging lens, which is movable in accordance with movement of the shaft. The braking assembly may include a braking coil to which electricity may be applied to produce a magnetic field, a braking magnet capable of changing position as it interacts with the magnetic field, and a braking spring coupled with the magnet such that the spring changes position as the magnet changes position. When the braking spring is in one position, the spring exerts pressure on the actuator shaft substantially preventing the shaft from engaging in linear movement and thus maintaining the shaft in position. When the actuator shaft is in another position, the braking spring does not exert pressure on the shaft permitting the shaft to engage in linear movement.

A brushless direct current motor including a rotor, a first stator disposed adjacent the rotor, and a second stator disposed adjacent the rotor. The first stator is configured to selectively cause a rotational movement of the rotor during normal operation of the motor, and the second stator is configured to selectively maintain a stationary position of the rotor against a force exerted by an external source.

An assembly comprising a rotational driving mechanism of a drive shaft, and an electromagnetic retarder capable of slowing down the rotation of the drive shaft. The driving mechanism has a housing and a drive shaft extending along an axial direction. The electromagnetic retarder has a stator support fixed to the housing that has at least one relief extending along the axial direction, and in that the housing comprises at least one complementary relief cooperating with at least part of the relief of the stator support to fix the position of the stator support in relation to the housing along at least one direction contained in a plane perpendicular to the axial direction.

An assembly comprising a rotational driving mechanism of a drive shaft, and an electromagnetic retarder capable of slowing down the rotation of the drive shaft. The driving mechanism has a housing and a drive shaft extending along an axial direction. The electromagnetic retarder has a stator support fixed to the housing that has at least one relief extending along the axial direction, and in that the housing comprises at least one complementary relief cooperating with at least part of the relief of the stator support to fix the position of the stator support in relation to the housing along at least one direction contained in a plane perpendicular to the axial direction.

An electric machine has a stator, which has at least one first magnet and at least one second magnet, and a rotor, which can be driven by the magnets and can rotate about an axis of rotation relative to the stator. The first magnet is held on a first ring and the second magnet is held on a second ring following the first ring in the axial direction of the electric machine. The second ring can, together with the second magnet, rotate about the axis of rotation relative to the first ring and the first magnet.

A motor 1 includes a shaft 2, a rotating body 6 fixed to the shaft 2, a first magnetic body 3 fixed to the shaft 2 and a stationary part including a second magnetic body 4, wherein one of the first magnetic body 3 and the second magnetic body 4 includes a magnet, and the first magnetic body 3 opposes the second magnetic body 4 over an entire circumference.

Electromechanical actuator mechanisms for storm brakes are provided. The actuator mechanisms generally comprise an electro-mechanical release system and a permanent magnet eddy current brake system with adjustable air gap for varying brake setting time, and for energy dissipation of the storm brake main spring force or weight.

Electromechanical actuator mechanisms for storm brakes are provided. The actuator mechanisms generally comprise an electro-mechanical release system and a permanent magnet eddy current brake system with adjustable air gap for varying brake setting time, and for energy dissipation of the storm brake main spring force or weight.

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.