摘要
指出了现有教科书和文献中有关电磁铁动态吸力公式的推导是不严密的,存在理论缺陷。基于虚位移原理,给出了电磁铁动态吸力公式的严格数学推导,从而证明此公式的普适性。基于此公式,进一步导出了电磁铁的动态运动方程,将电磁铁动铁芯的行程特性、吸力和阻力特性有机地结合起来,为电磁铁动态特性的逆分析奠定了基础。
It is pointed out through analysis that in the currently available textbooks and literatures some deficiency exists regarding the deduction methodology of the dynamic magnetism formula. Based on the “Virtual Displacement” theory, a strict mathematical description as well as rational deduction was presented on a physical basis, hence proving the ubiquity and universal applicability of the formula. Further, a fundamental dynamic motion equation for electromagnet was deduced, which comprehensively integrates the intrinsic relationship between the travel length of the moving magnet, the magnetism and the counteraction force, and a theoretical basis for converse analysis of the dynamic characteristics of electromagnet was also presented.
出处
《低压电器》
北大核心
2005年第11期10-11,32,共3页
Low Voltage Apparatus
基金
电力系统及发电设备安全控制与仿真国家重点实验室开放基金资助项目(04-2)
关键词
电磁铁
动态吸力
数学描述
electromagnet
dynamic magnetism
mathematical description
