| 摘要 |
<p>Long-side coil-winding surfaces (34) are each formed so as to have an intermediate high point (34a) between the ends thereof in a coil-winding direction, with sloped surfaces (34b, 34c) that are formed so as to gradually decrease in height from said intermediate high point (34a) towards short-side coil-winding surfaces (35). This makes it such that the shape of each long-side coil-winding surface (34) matches the manner in which the section of a coil (13) that runs along said long-side coil-winding surface (34) loosens as the coil (13) is wound, and this prevents a gap (air layer) from forming between that coil section and that long-side coil-winding surface (34). Heat generated by the coil (13) is thus transferred to the long-side coil-winding surfaces (34) (an insulator (12)) and dissipated to the outside well, improving the heat-removal performance of the coil (13).</p> |
