A drive includes an electric motor with a brake and a fan cowl. The fan cowl is connected to a housing, in particular to a stator housing part, of the electric motor in a detachable manner. A rod is able to be passed through a cover part, which projects through a recess, in particular a recess arranged in the form of a slot, in the fan cowl.

An electric motor comprising: a first element having at least one electromagnet, a second element, rotatable relative to the first element about an axis, the second element comprising at least one permanent magnet, wherein the electric motor is arranged to generate a torque by applying a rotating magnetic field to the second element, and a friction member coupled to the first element such that the friction member is non-rotatable relative to the first element about the axis, the friction member comprising a magnetically susceptible material and being biased by a first biasing force toward the second element, wherein the first element, the second element and the friction member are configured such that: when the electromagnet is not energised, the first biasing force causes the friction member to contact the second element to generate a braking torque.

An input device includes a brake applying unit configured to apply a braking force to a rotating body and a torque applying unit configured to apply a driving torque to the rotating body. The brake applying unit includes a rotary plate rotatable together with the rotating body, magnetic viscous fluid disposed in a gap between a fixed portion and the rotary plate, and a brake applying coil configured to apply a magnetic field to the magnetic viscous fluid. The torque applying unit includes a stator and a rotor. One of the stator and the rotor includes a magnet and the other includes torque applying coils inducing magnetic fields for generating the driving torque. A controller is provided to control currents applied to the brake applying coil and the torque applying coils. The torque applying unit is disposed to surround an outer periphery of the brake applying unit.

An electric motor, e.g., a bearing-free electric motor, includes a rotor and stator. The rotor has a rotor shaft on which a rotor packet is mounted and connected to the rotor shaft in a torsionally fixed manner. The rotor packet includes rotor segments that are stacked on top of one another in the axial direction, and a centering disk as well as a press-fit connection device, in particular a shrink-fit connection device having a shrink disk and compression rings. The stack, which includes the rotor segments, is situated between the centering disk and the press-fit connection device.

A braking mechanism for an electric motor includes an electromagnet configured to be selectively energized in response to a control signal. The braking mechanism also includes a first braking member coupled for co-rotation with a motor shaft of the electric motor, the first braking member being configured to selectively translate axially relative to the motor shaft between a first position and a second position. The braking mechanism also includes a second braking member located between the first braking member and the electromagnet and rotationally fixed relative to the first braking member. When the electromagnet is energized, the electromagnet causes the first braking member to translate from the first position to the second position at which the first braking member engages the second braking member to brake the electric motor.

A torque ripple in a rotary electric machine is sufficiently reduced. At least two of the plurality of laminated plates in the rotor core include a magnetic pole having the base formed on the outer peripheral side of the storage space, and a bridge part connected to the magnetic pole. A plurality of magnetic poles are provided in the circumferential direction, and the first space is formed between the bases of a pair of magnetic poles adjacent in the circumferential direction. The q-axis outer peripheral portion, which is located between the pair of circumferentially adjacent magnetic poles and is in contact with the first space, is provided on the inner peripheral side of the base. The base includes the side surface portion which is in contact with the first space, and the protrusion which is provided on the outer peripheral side of the side surface portion and protrudes in the circumferential direction with respect to the side surface portion. The bridge are arranged on the inner peripheral side of the side surface portion.

An electric motor including a rotor, a stator disposed adjacent to the rotor, and a brake mechanism. The stator is configured to cause a rotational movement of the rotor during operation of the electric motor and the brake mechanism is configured to selectively maintain a stationary rotational position of the rotor against a force exerted by an external source.

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.

Disclosed herein are a brake device of an in-wheel motor and an in-wheel motor including the same. The brake device of an in-wheel motor includes a brake drum part fixed to one surface of a rim of an in-wheel motor and having at least one hole, and at least one pin pushing/pulling driver installed inside the brake drum part in a radial direction thereof and configured to push or pull a pin, which is insertable into the hole according to an input of a braking signal of the in-wheel motor, toward or from the hole. The brake drum part includes a disc body having a hollow and an outer wall, wherein a shaft of the in-wheel motor is disposed to pass through the hollow and the outer wall is fixed to the rim, and a circumferential protrusion protruding a predetermined length in a direction spaced apart from the disc body to the rim and having the hole in the circumferential protrusion. When the braking signal is input, a braking force is rapidly applied to the in-wheel motor, and also the braking force is constantly maintained using a mechanical mechanism even when a supply of electric power is cut off on an inclined road and the like such that safety can be improved.

A rotary wing driving apparatus includes a motor, a rotary wing, and an electromagnetic brake. The rotary wing is attached to a shaft of the motor. The electromagnetic brake is attached to the shaft of the motor.