CAJ | 학술논문

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。
허공법시일충계산전자력화전자전구적상용방법。유우목전대영자체내적자공능몰유명학적계산방법,사득허공법재용우함유영자체적계통시수도일정적한제。본문명학급출료영자체자공능적계산방법,병대기물리의의진행료천술;통과실례계산험증료계산방법적정학성;대영자체적실제퇴자특성진행료고필,기결과구유보편적괄용성,험증료해계산방법적합이성;병재차기출상분별채용해석법화도해법,대무전도전류시영자체계통적자공능진행료계산화분석。해계산방법위허공법적응용제공료일정적이론기출,가이재일정정도상탁관허공법적응용범위。
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 applicability of the method is investigated considering practical demagnetization characteristics,and moreover,the overall co-energy of a permanent magnet system is also presented using both analytical method and graphical method.All the above has provided theoretical foundation for the virtual work method and can widen its area of application to a certain extent.