| 摘要 |
A stator disc 13 in an axial flux machine comprises three separate winding discs 13a, 13b, 13c (fig.2). Each winding disc 13a,b,c is formed from a number of sectors, and in each sector the winding wire 20 is formed in the shape of a spiral (fig.1). It is necessary to bring the winding 20 out from the centre of one coil to the start of the next, and a portion of the winding must sit on top of the previous turns. In the present invention, the wire 20 contains many strands 30 (fig.3), and may be flattened or compacted under pressure. In a manufacturing process, the wire is layed out generally as shown in fig.1 and the winding layout is placed between the anvils 40 of a pressing machine which causes the bridging portions 20a, b (fig.5a,b) to be compressed to a large extent. A small thin insulating sheet of 35 is placed between the bridging portion 20a and the winding 20b and allows the windings to move relative to each other without damaging their insulation. After the pressing stage, the winding is encapsulated in an electrically insulating material such as epoxy resin. Sheets of fibreglass mat may be added to improve the mechanical strength of the disc. Each disc may be compressed to a thickness less than the original diameter of the wire 20 used to form the winding. |
