Other

Hoganas Ab

H&ouml;gan&auml;s Ab

Barrie Mecrow

Alan Galloway Jack

James Stonehouse Burdess

Phillip George Dickinson

Glynn James Atkinson

John Neville Fawcett

Öystein Krogen

&Ouml;ystein Krogen

Dawn Stephenson

John Terence Evans

A stator or a rotor for an electrical machine comprises a plurality of circumferentially separated, radially extending teeth, wherein each tooth having a single winding and is provided with an axially and radially extending reluctance barrier to increase the reluctance of each tooth regarding propagation of a magnetic field not interacting with the winding of said tooth.

Electrical machine stator and rotor

A stator ( ) for an electrical induction machine comprises at least two stator sections ( ) at two different axial positions, each section having a plurality of circumferentially separated, radially extending teeth ( ) and each tooth having a single winding. The stator sections are mutually phase-shifted so as to reduce the effect of other harmonics than the working harmonics. In a stator having two separated stator sections, these are physically phase-shifted by 180&deg; electrical&plusmn;an angle related to skew, and then have their electrical supplies also shifted by 180&deg; electrical.

Induction machine stator

A stator core for an electrical machine includes an annular yoke and a plurality of teeth spaced circumferentially on the annular yoke and extending radially therefrom, the spaces between the teeth defining circumferentially spaced winding slots. The teeth are formed as separate components from a soft magnetic powder material. Each tooth has non-decreasing cross-sectional dimensions in a direction towards a distal tip along a length of the tooth corresponding to a winding slot, and has the same or smaller cross-sectional dimensions along a proximal end of the tooth. Thereby, the tooth may be assembled with a core-back section of the annular yoke and is able to receive a coil before the assembling with the yoke.

Stator with teeth formed from a soft magnetic powder material

A stator assembly for an electrical machine comprises a core made of a magnetic material. The core has an annular yoke (,) and a plurality of teeth (,) spaced circumferentially on the annular yoke and extending radially therefrom. The spaces between the teeth define circumferentially spaced winding slots (,). A stator winding is carried by the stator core and has coil turns located around the teeth and in the winding slots. Each tooth and a radially adjoining part (,) of the yoke have varying axial dimensions in order to adjust the magnetic flux to an optimal flux density in each part of the magnetic flux path in the stator. The annular yoke (,) may extend axially past the teeth (,) at least at one of the axial sides thereof.

Electrical machine element

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Tyne and Wear, United Kingdom

Barrie Mecrow