磁体工作状态判断标准的改进
AN IMPROVED CRITERION TO JUDGE THE ENERGY CONTRIBUTION OF MAGNETS
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摘要: 磁体结构优化设计需要用最少量的磁体产生最强的磁场,其要点之一是保证磁体的每一部分工作在退磁曲线上尽量靠近最大磁能积(BH)max的地方,目前用于磁场计算的程序CTA对磁体工作点的算法有缺陷,它对一个形状复杂磁体结构的磁场能量贡献大小的计算也不能给出唯一的结果,以便当作设计优劣的判据。作者就程序算法进行改进后,对每个磁体结构给出一个统一的平均磁能积作为判断磁体工作状态的标准,并进一步画出了磁能积的分布图。
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关键词:
- 磁体工作点; 平均磁能积; 磁能积分布
Abstract: The optimum design of magnet structures requires that every part of the magnets work at a point on the demagnetization curve which is as near to (BH)max as possible. CTA is a program for the computation of magnetic fields in axisymmetric systems. It has some defects in its search for magnet working points, and furthermore, for a complex structure it cannot provide a sole result to judge how much magnetic energy is contributed by the magnets. In this paper the authors introduce average magnetic energy product to serve as a criterion for the judgment of the work state of magnets. For every magnet structure the improved CTA can present a unique average magnetic energy product and a map of the energy product distribution. -
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