永磁体产生强磁场的研究

Research on production of intense permanent magnet field

为了产生高于永磁体剩磁Br的聚焦强磁场,提出了一种由软铁材料与永磁材料构成的混合型魔环结构.使用剩磁Br仅为0 38T的铁氧体,在一个中空柱形磁体气隙内可产生最高达1 56T的磁场.与传统魔环结构相比,混合型魔环结构具有体积小、重量轻、成本低的优点,而且不会发生退磁现象.

In order to produce a focus magnet field beyond the remanence Br of permanent magnet, a hybrid structure of magic ring is presented, which is made of the ferromagnet materials and permanent magnet. Using Hard Ferrite magnet with the remanence Br of only 038?T,a hollow cylindrical magnet can generate a magnet field whose max field strength is 156?T. The hybrid structure of magic ring has the advantages of smaller volume, lighter weight and lower cost over the traditional structure of magic ring, moreover it can overcome the reverse magnet field.