| 摘要 |
<p>A multipolar magnetic ring that generates a sinusoidal magnetic field has a cylindrical shape and two magnetic poles, north (N) and south (S), which are imbricated one in the other in such a manner that their widths (Lp) are equal and constant. Two magnetic transitions between each of the two poles each follow a continuous curve that moves by one half pole width for each quarter of a turn of the magnetic ring, with the two curves being shifted by 180 DEG so that the magnetic field has a single period per turn of the magnetic ring. The magnetic field is implemented either along two spirals (s1 and s2) on one of the flat faces, or along two helixes (h1 and h2) on its cylindrical side. The magnetic ring may be used in absolute-position sensors, notably in bearings.</p> |
