Abstract: The present invention relates to a stator housing for an axial flux electrical machine, the stator housing being tubular and substantially cylindrical in shape, the inner surface of the housing comprising a plurality of recesses, each recess configured to receive an outer part of a conductive coil of a stator of an axial flux electrical machine. The cross-section of each recess, perpendicular to the axis of rotation of the axial flux electrical machine, is preferably elongate, the major dimension of each elongate recess extending substantially in the radial direction of the axial flux electrical machine.

Abstract: A conductive coil 12 for a yokeless axial flux electrical machine stator 1 with distributed windings and flux guides 30, a stator 1 comprising a plurality of such coils, a yokeless axial flux electrical machine 100 comprising the stator 1, and a method 500 of manufacturing a stator 1 are provided. The conductive coil 12 comprises a first active section 121 a and a second active section 121 b, each active section 121 a, 121 b extending in a generally radial direction substantially perpendicular to an axis of rotation of the electrical machine and comprising a plurality of winding turn portions 131a, 131 b stacked parallel to the axis of rotation such that a cross-section perpendicular to the radial direction of each active section 121a, 121 b is elongate with a major dimension parallel to the axis of rotation. The second active section 121 b is pitched apart in a circumferential direction and axially offset from the first active section 121 a.

Abstract: A stator (10) for an axial flux electrical machine (100), an axial flux machine (100) that includes the stator (10), and a method (500) of manufacturing a stator (10) are provided. The conductive coils (12) which form the stator (10) provide a structure which includes spaces (131a, 131b, 131c, 132a, 132b) for flux guides (30), which improves ease of stator manufacture. It also allows for a high number of slots per pole per phase, which provides a more sinusoidal back-EMF.

Abstract: Disclosed is a linear electric motor having a fixed primary comprising a stator divided into a number of sections, including a translating secondary having an operative length longer than any two adjacent sections of the stator in the form of a reaction plate, and a connecting means for connecting only those sections of the stator that are at least partially covered by the reaction plate. The position of the reaction plate relative to the stator is determined by monitoring current in the active representative sections. Power is supplied to each stator section individually, with power supplied in a modulated manner to end active stator sections only partially covered by the reaction plate. A measurement of the current to the active representative section is used to control output voltage to all energized stator sections and is used to determine the change in position of the reaction plate.

Abstract: Disclosed is a linear electric motor having a fixed primary comprising a stator divided into a number of sections, including a translating secondary having an operative length longer than any two adjacent sections of the stator in the form of a reaction plate, and a connecting means for connecting only those sections of the stator that are at least partially covered by the reaction plate. The position of the reaction plate relative to the stator is determined by monitoring current in the active representative sections. Power is supplied to each stator section individually, with power supplied in a modulated manner to end active stator sections only partially covered by the reaction plate. A measurement of the current to the active representative section is used to control output voltage to all energized stator sections and is used to determine the change in position of the reaction plate.

Abstract: Disclosed is a linear electric motor having a fixed primary comprising a stator divided into a number of sections, including a translating secondary having an operative length longer than any two adjacent sections of the stator in the form of a reaction plate, and a connecting means for connecting only those sections of the stator that are at least partially covered by the reaction plate. The position of the reaction plate relative to the stator is determined by monitoring current in the active representative sections. Power is supplied to each stator section individually, with power supplied in a modulated manner to end active stator sections only partially covered by the reaction plate. A measurement of the current to the active representative section is used to control output voltage to all energized stator sections and is used to determine the change in position of the reaction plate.

Abstract: A linear electric motor has a fixed primary comprising a stator that is divided into a number of sections, a translating secondary that has an operative length that is longer than any two adjacent sections of the stator in the form of a reaction plate, and a connecting means for connecting only those sections of the stator that are covered, either fully or partially, by the reaction plate. The stator sections are categorised in three groups—two groups of representative sections and an ordinary group of sections. The first and second representative sections alternate with ordinary sections between them. The position of the reaction plate relative to the stator is determined by monitoring current in the active representative sections. The length of the reaction plate is equal to the distance from the beginning of the first representative stator section to the end of the ordinary stator section immediately following the next second representative stator section.