Abstract: The present disclosure relates to a winding for an electrical machine. The winding comprises at least one flat conductor having at least one turn to form the winding, and the at least one flat conductor comprises a substantially L-shaped, U-shaped or V-shaped cross-section. The present disclosure also relates to an electrical machine that includes the winding and an aircraft that includes the electrical machine.

Abstract: A printed circuit board includes a circuit layer with an electrical conductor for conducting electricity through the printed circuit board and a support layer for supporting the circuit layer. The support layer include a fibre-reinforced epoxy layer having a thermally conductive and electrically insulating filler powder embedded therein. The support layer has a thermal conductivity of at least 1 W/m.K.

Abstract: A stator core for an electric machine includes a stator tooth for mounting an electromagnetic coil and a cooling structure associated with the stator tooth. The cooling structure has multiple sections adjacent each other along a direction parallel to the axis of the stator core. Each section includes multiple channels for the flow of a coolant. The plurality of channels are spaced azimuthally from each other and are arranged asymmetrically about the stator tooth. Adjacent sections of the cooling structure along the axis of the stator core are substantially identical to each other and are rotated 180 degrees about a radial direction relative to each other.

Abstract: A stator for an electrical machine includes: an annular housing extending around a central axis (X-X); a first circumferential flow channel extending around the housing; a second circumferential flow channel axially spaced from the first circumferential flow channel and extending around the housing; and a plurality of windings. The plurality of windings are circumferentially spaced about the housing to form a passage between each two adjacent windings. Each passage is in fluid communication with both the first circumferential flow channel and the second circumferential flow channel. The first circumferential flow channel is closed to flow at a first circumferential location and the second circumferential flow channel is closed to flow at a second circumferential location, removed from the first circumferential location so as to form a first set of passages (S1) connected in parallel and a second, separate set of passages (S2) connected in parallel.

Abstract: The present disclosure relates to a winding for an electrical machine. The winding comprises at least one flat conductor having at least one turn to form the winding, and the at least one flat conductor comprises a substantially L-shaped, U-shaped or V-shaped cross-section. The present disclosure also relates to an electrical machine that includes the winding and an aircraft that includes the electrical machine.

Abstract: A stator is described herein comprising a first longitudinally extending slot having a cavity defined by a first inwardly facing longitudinal surface and a second inwardly facing longitudinal surface; said stator further comprising a spacer provided in said cavity of said first slot, said spacer comprising a first spacer component that comprises a first sheet of material having a first sheet surface facing inwardly into said slot and an opposite sheet surface that is in contact with and extends along the first longitudinally extending inner surface of said slot and wherein said inwardly facing first sheet surface of said first spacer component comprises at least one ridge projection extending along its length L. Methods for assembling such stators are also described.

Abstract: A stator is described herein comprising a first longitudinally extending slot having a cavity defined by a first inwardly facing longitudinal surface and a second inwardly facing longitudinal surface; said stator further comprising a spacer provided in said cavity of said first slot, said spacer comprising a first spacer component that comprises a first sheet of material having a first sheet surface facing inwardly into said slot and an opposite sheet surface that is in contact with and extends along the first longitudinally extending inner surface of said slot and wherein said inwardly facing first sheet surface of said first spacer component comprises at least one ridge projection extending along its length L. Methods for assembling such stators are also described.

Abstract: An extruded housing for an electric motor comprises: an extruded cylindrical body for holding electrical parts of the motor, extruded axial fins formed about the outside of the cylindrical body, and radial cuts machined through the axial fins.

Abstract: An extruded housing for an electric motor comprises: an extruded cylindrical body for holding electrical parts of the motor, extruded axial fins formed about the outside of the cylindrical body, and radial cuts machined through the axial fins.