Apparatus (200) for use as a motor or generator, comprising: a first part (210); a second part (230) movable relative to the first part (210) and spaced from the first part (210) by an air gap (260); and a plurality of spaced activatable magnet elements (220) provided on the first part (210), each activatable magnet element (220) being operative when activated by application of an electric current thereto to direct a magnetic field across the air gap (260) towards the second part (230); wherein each activatable magnet element (220) comprises: a pole piece (222) defining an air-gap facing surface (223A, 223B), the pole piece (222) comprising: a first limb (224A); a second limb (224B); and a coil-winding section (224C) positioned between the first and second limbs (224A, 224B); a permanent magnet arrangement (225) provided between the first and second limbs 224A, 224B) of the pole piece; and an electrically conductive coil (226) wound around the coil-winding section (224C) of the pole piece, wherein the electrically conductive coil (226) is operative to generate a magnetic flux oriented to oppose the magnetic flux of the permanent magnet arrangement (225); characterised in that the pole piece (222) further comprises a parallel flux path section (224D) extending in parallel to the coil-winding section (224C) operative to allow magnetic flux from the permanent magnet arrangement (225) to flow in parallel to the coil-winding section (224C).

Apparatus (200) for use as a motor or generator, comprising: a first part (210); a second part (230) movable relative to the first part (210) and spaced from the first part (210) by an air gap (260); and a plurality of spaced activatable magnet elements (220) provided on the first part (210), each activatable magnet element (220) being operative when activated by application of an electric current thereto to direct a magnetic field across the air gap (260) towards the second part (230); wherein each activatable magnet element (220) comprises: a pole piece (222) defining an air-gap facing surface (223A, 223B), the pole piece (222) comprising: a first limb (224A); a second limb (224B); and a coil-winding section (224C) positioned between the first and second limbs (224A, 224B); a permanent magnet arrangement (225) provided between the first and second limbs 224A, 224B) of the pole piece; and an electrically conductive coil (226) wound around the coil-winding section (224C) of the pole piece, wherein the electrically conductive coil (226) is operative to generate a magnetic flux oriented to oppose the magnetic flux of the permanent magnet arrangement (225); characterised in that the pole piece (222) further comprises a parallel flux path section (224D) extending in parallel to the coil-winding section (224C) operative to allow magnetic flux from the permanent magnet arrangement (225) to flow in parallel to the coil-winding section (224C).

The method for manufacturing the Halbach magnet array comprises a) magnetizing at least one first magnetic material piece and at least one second magnetic material piece in a direction parallel to a first direction, and b) magnetizing a third magnetic material piece in a direction parallel to a second direction perpendicular to the first direction, in this order. The first magnetic material piece and the second magnetic material piece are alternately arranged in the second direction with the third magnetic material piece interposed therebetween. The first magnetic material piece adheres to the adjacent third magnetic material piece via a non-magnetic layer with a thickness t1, the second magnetic material piece adhere to the adjacent third magnetic material piece via a non-magnetic layer with a thickness t2, and t1 and t2 satisfy a formula t1<t2.

A two degree-of-freedom brushless DC motor includes a stator, a rotor, a plurality of distributed stator windings, and a stator voice coil winding. The stator includes an inner stator structure and a plurality of arc-shaped stator poles. The inner stator structure includes a main body and a plurality of spokes that are spaced apart from each other to define a plurality of stator slots. Each arc-shaped stator pole is connected to a different one of the spokes. The rotor is spaced apart from the stator, includes a plurality of magnets, and is configured to rotate about a plurality of perpendicular axes. The distributed stator windings are wound around the plurality of spokes and extend through the stator slots. The stator voice coil winding is wound around the outer surfaces of the arc-shaped stator poles. The arc-shape and spacing of the stator poles define the stator as being spherically shaped.

There are provided a reflecting module for optical image stabilization (OIS) and a camera module including the same. The reflecting module for OIS includes a housing to which a board is coupled, the housing including an opening, a moving holder disposed in an internal space of the housing, an elastic member fixedly coupled to the housing to support the moving holder so that the moving holder is movable, a reflecting member provided on the movable holder, and a driving part including a plurality of magnets provided on the moving holder, and a plurality of coils provided on the board and respectively opposing the plurality of magnets, wherein the plurality of coils are disposed to oppose the plurality of magnets through the opening.

There are provided a reflecting module for optical image stabilization (OIS) and a camera module including the same. The reflecting module for OIS includes a housing to which a board is coupled and including a through-hole, a moving holder connected to the housing by an elastic member, a reflecting member provided on the moving holder, and a driving part providing driving force to the moving holder to move the moving holder relatively with respect to the housing, wherein the elastic member includes a housing fixing part fixed to the housing and a holder fixing part fixed to the moving holder, wherein the driving part includes a magnet provided on the moving holder and a coil provided on the board and opposing the magnet, and wherein the coil is disposed to oppose the magnet through the through-hole.

A system for wirelessly transmitting power between a track and independent movers in a motion control system includes a pick-up coil provided proximate to the magnets on the movers. The fundamental component of the voltage applied to the drive coils interacts primarily with the magnetic field generated by the permanent magnets on the movers and not with the pick-up coil. Consequently, the pick-up coil does not interfere with desired operation of the movers but rather, interacts primarily with the harmonic components and has current and voltages induced within the pick-up coil as a result of the harmonic components. The energy captured by the pick-up coil reduces the amplitude of eddy currents on the mover. After harvesting the harmonic content, the pick-up coil may be connected to another circuit on the mover and serve as a supply voltage for the other circuit.

A tracked vehicle encompassing: a load subassembly; a drive track that is retained movably on the load subassembly in order to execute a motion along a circulation path of the drive track;

a linear motor, a stator of the linear motor being arranged in stationary fashion with respect to the load subassembly, and a rotor of the linear motor being arranged for motion together with the drive track, and/or the rotor being embodied in the drive track; the rotor having permanent magnets that are arranged in the drive track and are embodied for motion together with the drive track.

A switch-on unit for a tool of a movable unit of a linear transport system can be fastened to the movable unit. The switch-on unit includes a housing, an energy-receiving coil with energy-receiving electronics, and a movable antenna with communication electronics. The energy-receiving electronics and the communication electronics are disposed on at least a first circuit board within the housing. The housing has an opening for connections of the tool and an installation space for application electronics. A first circuit board has a first interface for the application electronics, with a power supply and communication link. The communication electronics are arranged to receive a first data signal via the movable antenna, to calculate a second data signal from information about a data structure of the first data signal and the first data signal, and to provide the second data signal at the communication link.

A transfer apparatus includes a first linear transfer part which moves a slider in a first direction by using a first fixed linear module fixed on a first base; a module moving part which moves a module holding member holding a movable linear module in a second direction different from the first direction, to position the movable linear module at a first coupling position to couple with the first fixed linear module and cause the slider to transfer between the movable and first fixed linear modules; a linear scale having a scale extending in the second direction and a sensor which detects the scale; and a controller which acquires first module position information indicating a position of the movable linear module relative to the first fixed linear module in the second direction and controls movement of the module holding member based on the first module position information.