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大型的高性能的音圈电机大多数采用铝镍钴磁钢,因为它能产生高的气隙磁密。但是希土磁钢产生同样气隙磁密所需要的重量更轻,因而提高了音圈电机的性能。本文对两种磁钢进行比较,其中高磁能材料用的是Crucible 公司的Crucore(SmCo 5钐钴5)。音圈电机工作原理音圈电机工作原理可用扬声器的结构来说明。它包括一个用铜线绕成的圆筒螺管线圈。线圈外是一个单一的磁极(磁场沿径向穿入或穿出线圈)。这个磁极是用磁钢产生的,磁钢
Most high-performance voice coil motors use Alnico magnets because they produce high air gap flux density. However, the rare earth magnets required to produce the same air-gap flux density are lighter, thus improving the performance of the voice coil motor. In this paper, two types of magnets were compared. Crucible Co CruCoore (SmCo 5 SmCo 5) was used as the high magnetic material. Voice coil motor working principle Voice coil motor working principle can be used to illustrate the structure of the speaker. It consists of a cylindrical solenoid coil wound with copper wire. Outside the coil is a single pole (magnetic field penetrates or pierces the coil radially). This pole is made of magnet, magnet