Abstract: A method for manufacturing a coil module for a stator for a tubular linear motor includes placing a plurality of bobbins and spacers on a winding mandrel and winding the plurality of bobbins with a single length of wire to form a set of coils. Three sets of such coils are interleaved on an encapsulation mandrel. A plurality of metal comb shaped elements, each including a longitudinal spine and a plurality of teeth are distributed about the circumference of the three interleaved sets of coils to form a coil module. The coil module and the mandrel are surrounded with an encapsulation mold. An encapsulating material is introduced into the encapsulation mold. The encapsulated coil module is removed from the encapsulating mold and the encapsulation mandrel after setting of the encapsulating material.

Abstract: A modular design for and method of constructing long stators for tubular electric linear motors having many sets of coils. In certain embodiments, the stator is made by assembling a multiplicity of identical coil modules which are combined to form a stator of whatever length may be required. In some embodiments, coil modules containing the coils are connected by intermediate connectors. In those embodiments, the sum of the effective length of the coil module and the effective length of the intermediate connector must be an integral multiple of the pole pitch of the magnets in the motor's mover. In some embodiments, longitudinal grooves are formed in the coil modules to provide paths for coolant.

Abstract: A method for manufacturing a coil module for a stator for a tubular linear motor includes placing a plurality of bobbins and spacers on a winding mandrel and winding the plurality of bobbins with a single length of wire to form a set of coils. Three sets of such coils are interleaved on an encapsulation mandrel. A plurality of metal comb shaped elements, each including a longitudinal spine and a plurality of teeth are distributed about the circumference of the three interleaved sets of coils to form a coil module. The coil module and the mandrel are surrounded with an encapsulation mold. An encapsulating material is introduced into the encapsulation mold. The encapsulated coil module is removed from the encapsulating mold and the encapsulation mandrel after setting of the encapsulating material.

Abstract: In order to provide a magnetic pole-piece having good immunity to eddy currents while providing a high torque rating there is provided a magnetic pole-piece (60) comprising a magnetic part (64) and a retaining part (62), wherein the retaining part (62) supports the magnetic part (64).

Abstract: A modular design for and method of constructing long stators for tubular electric linear motors having many sets of coils. In certain embodiments, the stator is made by assembling a multiplicity of identical coil modules which are combined to form a stator of whatever length may be required. In some embodiments, coil modules containing the coils are connected by intermediate connectors. In those embodiments, the sum of the effective length of the coil module and the effective length of the intermediate connector must be an integral multiple of the pole pitch of the magnets in the motor's mover. In some embodiments, longitudinal grooves are formed in the coil modules to provide paths for coolant.

Abstract: In order to provide a magnetic pole-piece having good immunity to eddy currents whilst providing a high torque rating there is provided a magnetic pole-piece (60) comprising a magnetic part (64) and a retaining part (62), wherein the retaining part (62) supports the magnetic part (64).

Abstract: Embodiments of the present invention provide an electrical machine comprising a first moveable element having a first plurality of permanent magnets associated therewith, a winding arranged generally adjacent to the first moveable element, wherein the winding is arranged to interact magnetically with a magnetic field of the permanent magnets associated with the first moveable element; a second plurality of permanent magnets; a second moveable element arranged adjacent to the first moveable element and having a plurality of a plurality of pole-pieces associated therewith, wherein the pole pieces are arranged to modulate the fields of the first and second pluralities of permanent magnets to enable magnetic coupling there-between, such that the first and second moveable elements move in a magnetically geared manner.

Abstract: A wind turbine power train comprising a turbine rotor stage and drive shaft; an electric generator stage connected to the turbine rotor stage and a power electronic converter stage connected to the electric generator stage; wherein the electric generator stage comprises an electrical machine with integral magnetic gearing, an output of the electric generator stage being AC electrical power.

Abstract: A magnetic actuator for reciprocating motion of a compressor diaphragm, piston or the like. The actuator comprises a stator with stator poles, excitation windings, and a backing plate. Non-magnetic support arms carry arced magnet poles and actuate a pair of compressed diaphragms. With the introduction of coil current, magnet poles are attracted to the central stator poles and repulsed by outer poles. A torque about pivot results and hence movement of arms with consequential actuation of the diaphragms. Performance is improved by increasing the flux produced by the electromagnet, thereby reducing flux leakage and fringing.

Abstract: A linear magnetic actuator has a pair of stator windings (14, 15) of opposite polarity formed inside a cylindrical soft iron shell (16) providing a slotless back iron piece. The axially movable shuffle comprises a soft iron shaft (11) with a pair of radially magnetised annular permanent magnets (12 and 13). The arrangement has cylindrical symmetry and the stator windings are as thin as possible to minimise the air gap between the cylindrical pole faces of the annular magnets and the back iron.