决定于极化磁系统工作状态的永磁回复线起始点的探讨

极化磁系统永磁回复线的起始点是用各种方法对其进行计算的前提和基础。在很多情况下，永磁回复线的起始点是由其极化磁系统的工作状态决定的。该文以典型的差动式极化磁系统为对象，从建立永磁工作方程式出发，通过对极化磁系统动态过程的分析，得到了此时确定或近似确定永磁回复线起始点的两种方法：测试法和近似分析法；最后给出了以永磁回复线起始点为基础的永磁虚拟矫顽力及回复线方程式，从而解决了计算极化磁系统时遇到的一个基本问题。

EXPLORATION OF THE STARTING POINT OF RECOIL LINE OF PERMANENT MAGNET DECIDED BY THE WORKING STATUS OF THE POLARIZED MAGNETIC SYSTEM

The starting point of the recoil line of permanent magnet is the base and the premise for the various calculations of the polarized magnetic system. It is decided by the working status of the polarized magnetic system in many instances. In this paper the testing method and approximate analysis method are introduced firstly to fix on the starting point of recoil line of permanent magnet in typical differential polarized magnetic system. These two methods are obtained by the foundation of the equation describing the working status of permanent magnet, and by the analysis of the dynamic process of polarized magnetic system. Then the equation of recoil line and the virtual coercive force of permanent magnet based on the starting point of its recoil line are presented, and basic problem of the calculation of polarized magnetic system is solved.