A rotary motor comprising an annular rotatable bearing having an inner surface having a diameter equal to or greater than 0.5 meters and an outer surface, the bearing including a plurality of magnetic rotor teeth elements positioned around a circumference of the outer surface and a stator including a plurality of permanent magnets and a plurality of energizable coils, the stator mounted separately from and positioned with respect to the bearing such that the plurality of rotor teeth elements of the bearing are radially proximate to the permanent magnets of the stator. Upon application of alternating current in a flux switch pattern in the plurality of energizable coils of the stator, torque is applied to the plurality of magnetic rotor teeth elements.

An apparatus including a first device configured to support a substrate thereon; a first transport having the first device connected thereto, where the first transport includes: rails or maglev guides; a magnetic system configured to vertically space the first device over the rails or maglev guides with a gap between the first device and the rails or maglev guides, where the magnetic system comprises a first electromagnetic actuator at a first corner of a first side of the first device, a second electromagnetic actuator at a second corner of the first side of the first device, and a third electromagnetic actuator at a second opposite side of the first device, where the third electromagnetic actuator is not located proximate a corner of three sides of the first device; and a linear actuator configured to move the first device along the rails or maglev guides.

A linear flux switching permanent magnet (FSPM) motor includes a longitudinal linear stator with stator teeth facing an air gap and a mover including at least one armature including armature teeth, which are spaced apart by slots for receiving an armature winding. At least some, preferably all of the armature teeth embed at least two permanent magnets, respectively, which are positioned successively in longitudinal direction of the tooth, whereby the two permanent magnets have different magnetic properties.

An electric motor assembly includes a primary electric motor including a primary rotor assembly and a primary stator assembly configured to be actuated to cause the primary rotor assembly to rotate based on an amount of magnetic flux in the rotor assembly. The assembly also includes a secondary electric motor including a secondary rotor assembly and a secondary stator assembly and a controllable magnetic device coupled to at least one of the primary rotor assembly and the secondary rotor assembly. The assembly also includes a controller configured to actuate the secondary electric motor based on a failure of the primary electric motor, and apply electric current to the controllable magnetic device to reduce back electromotive force (BEMF) caused by rotation of the primary rotor assembly during actuation of the secondary electric motor.

An apparatus for holding, positioning and/or moving an object is described. The apparatus includes a base, and a carrier which is movable relative to the base. The apparatus further includes at least three magnetic bearings, by means of which the carrier is supported on the base in a contactless manner such that the carrier can be displaced with respect to at least one predefined direction, wherein at least two of the magnetic bearings are configured as actively controllable magnetic bearings. The apparatus has at least one damping unit, which is fixed to the carrier or to the base.

A linear motor includes a stator and a mover. The stator has a plurality of salient poles. The mover includes a plurality of first teeth; a plurality of coils respectively mounted on the periphery of the plurality of first teeth; a plurality of first magnets respectively buried within the first teeth; a second tooth provided outside the plurality of first teeth; and a second magnet buried within the second tooth. The second tooth includes a first portion on the opposite side of the first teeth with respect to the second magnet; and a second portion close to the first teeth with respect to the second magnet. In a protruding direction of the second tooth, an edge of the first portion is farther from the stator than an edge of the second portion.

A linear motor including a stator assembly, an armature mechanically coupleable to a test specimen configured to be moved relative to the stator assembly by operation of the linear motor, and a suspension system configured facilitate movement of the armature relative to the stator assembly along an axis of movement without physically touching the armature during movement. Further disclosed is a multi-phase linear motor, a linear motor having an armature with an array of flat magnets, and a linear motor having a magnetic damping system.

A component mounting device head unit includes a head main body, a nozzle being provided on the head main body, a drive source, a cover, and a heat transfer member. The nozzle is configured to pick up a component. The drive source is configured to transfer moving power to at least one of the head main body and the nozzle. The cover covers the drive source. The heat transfer member connects the cover to the drive source or a frame of the drive source, and the heat transfer member is configured to allow heat generated by the drive source to escape to the cover.

The linear motor includes a stator and a mover. The stator includes: a board part having a rectangular plate shape, a plurality of magnetic pole teeth which are juxtaposing to each other on the board part and around each of which a coil is wound, and an auxiliary tooth which is arranged in an end part of the board part in a juxtaposed direction in a manner of being separate from the magnetic pole teeth and around which a coil is not wound. The mover includes: a plurality of magnets whose tip surfaces face the stator, and a back yoke having a rectangular plate shape in which the plurality of magnets are aligned in a straight line such that magnetic poles are alternately formed.

A linear motor control apparatus for controlling at least one of torque, speed and position of a linear motor includes circuitry that receives at least one of a magnetic pole position value, torque command signal, and speed command signal, and imparts a high-frequency voltage to at least one of a d-axis and a q-axis and impart a load current to the q-axis based on the at least one of the magnetic pole position value, torque command signal, and speed command signal. The d-axis is an axis extending in a central direction of a stator tooth of a stator, and the q-axis is an axis extending in a direction offset 90 degrees from the central direction in an electrical angle.