| 摘要 |
<p>A permanent magnet structure (10) having at least one loop of circulating flux comprises a first and second plurality of uniformly magnetized prismatic magnetic material sections (14, 18 and 12, 16) forming a polygonal shaped cavity and having a point F positioned along a zero equipotential base line joining two vertices within the cavity, that point being the reference for a figure of merit M corresponding to a maximum field strength and a minimum ratio of the value of the area of magnetized material to the area of the cavity. A third plurality of nonmagnetized magnetic sections (30, 32) enclose the base line and borders the first sections for providing an inductive path to channel the flux and close the loop.</p> |
