永磁体磁共能的计算方法

虚功法是一种计算电磁力和电磁转矩的常用方法。由于目前对永磁体内的磁共能没有明确的计算方法,使得虚功法在用于含有永磁体的系统时受到一定的限制。本文明确给出了永磁体磁共能的计算方法,并对其物理意义进行了阐述;通过实例计算验证了计算方法的正确性;对永磁体的实际退磁特性进行了考虑,其结果具有普遍的适用性,验证了该计算方法的合理性;并在此基础上分别采用解析法和图解法,对无传导电流时永磁体系统的磁共能进行了计算和分析。该计算方法为虚功法的应用提供了一定的理论基础,可以在一定程度上拓宽虚功法的应用范围。

An Algorithm for Analysis of Magnetic Co-Energy Stored in Permanent Magnets

The principle of virtual work is now used as a matter of routine to compute the electromagnetic force/torque.However,the absence of clear calculation method of the co-energy stored in permanent magnets has limited its applications in permanent magnet systems.In this paper,a novel algorithm of the co-energy stored in permanent magnets is proposed and the corresponding physical meanings are clarified.In addition,the correctness of the derived formulation is confirmed by an example.Based on them,the applicabil...