A motorized shade comprising a motor adapted to lower or raise a shade material for selectively covering an architectural opening based on a position of the sun. The motorized shade comprises a controller adapted to drive the motor phase according to a startup sequence by ramping up amplitude form an initial amplitude to a startup amplitude and ramping up frequency from an initial frequency to a drive frequency, drive the motor phase according to a full drive sequence to move the shade material by driving the motor phase according to a sinusoidal waveform at a set maximum amplitude and at a drive frequency, and drive the motor phase according to a wind down sequence by reducing frequency from the drive frequency to an end frequency and reducing the amplitude from the maximum amplitude to an end amplitude.

A surface cleaning apparatus is provided. The surface cleaning apparatus includes a dirt inlet, a rotatable brushing member, and a brush motor drivingly connected to the rotatable brushing member. The brush motor includes a plurality of field coils, a first motor sub-unit, a second motor sub-unit, and a motor controller. The first motor sub-unit includes a first rotor portion, a first stator portion, and a first field coil. The second motor sub-unit includes a second rotor portion, a second stator portion, and a second field coil. The first and second rotor portions are rotatable about a motor axis and are drivingly connected to the brushing member. The second motor sub-unit is axially spaced along the motor axis from the first motor sub-unit. The motor controller is operable to direct electric current through the plurality of field coils generating magnetic fields and driving rotation of the rotor portions.

A rotating body is shorter in radial direction than in axial direction. The inner circumferential surfaces of a first bearing and a second bearing are fixed at an outer circumferential surface of the shaft member. In the axial direction, the outer diameter of the shaft member is substantially the same from a part, of the shaft member, opposing the first bearing to a part, of the shaft member, opposing the second bearing, and the inner and outer diameters of the rotating body are substantially the same from an end part, of the rotating body, on the first bearing side to an end part, of the rotating body, on the second bearing side. In the axial direction, one of stators is disposed at a central part (C1) of the shaft member, one of magnets is disposed at a central part (C2) of the rotating body.

The centrifugal positive locking brake works inversely, that means, locking upon stopping and decoupling on start-up. When the drive motor is de-energized, the fixed ratchet(s) hit against at least one locking abutment on a locking disc positively fixed to the frame and lock the shutter. When voltage is applied, and with the associated quick start-up of the drive motor , the ratchet(s) disengage because of their inertia. This centrifugal positive locking brake for shutter drives is operated with a specially designed control method. After the power supply is interrupted, the ratchet(s) are drawn inward by the reloaded spring(s) so that they run against the locking abutment(s) and the shutter reliably locks in this position.

A motorized window treatment may include a roller tube, a flexible material attached to the roller tube, and a motor drive unit. The motor drive unit may be disposed within a cavity of the roller tube. The motor drive unit may include a motor, a gear assembly, and a shaft stabilization member. The motor may include a drive shaft extending from a drive end of the motor and a rear shaft extending from a non-drive end of the motor. The drive shaft and the rear shaft may be configured to rotate about a longitudinal axis. The gear assembly may be operatively coupled to the roller tube and the drive shaft. The shaft stabilization member may be operatively coupled to the rear shaft. The shaft stabilization member may be configured to dampen axial and/or radial forces in the motor drive unit.

The system may include a motor releasably connected to a control module and the control module releasably connected to a drive module. The system may further include a joint releasably connecting the control module to the drive module, wherein the joint includes a floating gear. The method may include determining a motor shaft rotation of a motor shaft in a motor, determining a shade tube rotation of a shade tube that moves a window shade over a path, comparing the motor shaft rotation to the shade tube rotation, determining, based on the comparing, that the shade tube rotation is not equal to the motor shaft rotation and determining that an obstacle exists in the path of the window shade. The method may also include determining a change in at least one of current or torque in the motor.

An electric motor includes a housing with a tubular wall extending in an axial direction of the housing and a closures positioned at opposite axial ends of the tubular wall, a stator fixedly mounted inside of the housing, a rotor rotatably mounted inside of the housing, and a bearing rotatably supporting the rotor. At least one of the closures includes a rotor supporting portion. The rotor supporting portion includes a through hole configured to receive a portion of the rotor. The through hole is defined by a closed shape including at least three or more straight sides, and a radius of an inscribed circle of the closed shape of the through hole is larger than a radius of the portion of the rotor received in the through hole.

The present invention provides a tubular linear actuator, comprising: a tubular coil assembly comprising multiple tubular coils arranged next to each other in longitudinal direction of the tubular linear actuator and concentric with respect to a longitudinal axis of the tubular linear actuator, and a magnet assembly comprising a series of permanent magnets with alternating polarization direction extending in the longitudinal direction, wherein the magnet assembly is at least partially arranged in the coil assembly and movably with respect to the coil assembly, wherein the tubular coils comprise edge windings.

The invention relates to a conveyor roller for conveyor systems for conveying containers, pallets, piece goods, and the like. The invention further relates to a method for producing and balancing, in particular dynamic balancing, such a conveyor roller. The conveyor roller comprises a roller body having a roller axle, the outside circumferential surface thereof being a contact surface for conveyed goods or being wrapped about by conveyed goods, and a head element (100), an insertion section (110) thereof being inserted into a hollow end of the roller body, wherein a groove (200) is formed on an end face (120) of the head element (100) facing away from the insertion section (110), in order to receive at least one balancing weight (301-304).

A motor comprising: (a) one or more motor stators including a plurality of motor windings; (b) a roller shaft connected to the one or more motor stators, the roller shaft extending along a longitudinal axis of the motor and being adapted to span between two frame members; and (c) a motor rotor including: (i) a roller tube including a key, a key recess, or both, and (ii) one or more ring magnets having: (1) a mating surface shaped to substantially mate to a mating surface of the roller tube and (2) a key recess that receives the key of the roller tube, that receives a separate key that extends into the key recess of one of the one or more ring magnets and the key recess, or both; wherein the one or more ring magnets are produced from a rare earth metal; and wherein the motor rotor carries a load of an article so that the article is moved by the motor rotor.