电压源励磁下非线性电磁机构瞬态过程的研究

本文通过推导连续域下的磁通链的积分表达式,建立了电压源励磁下非线性瞬态场的数学模型——微分—积分方程。通过有限元法与积分方程法耦合,得出了求解电压源励磁下非线性瞬态磁场的直接求解方法。该方法进一步同磁场中媒质的机械运动问题相耦合,从而求解电压源励磁下,考虑导电媒质中的涡流,铁磁材料非线性及媒质机械运动等条件下的瞬态过程问题,并编制了二维及轴对称场的计算程序。文中以螺管电磁铁为实例,实验结果与计算结果比较吻合。

A New Analytical Method of the Transient Magnetic Fields Coupled with Mechanic Motion in Solenoidal Electromagnet Excited by Voltage Source

A new method is presented for calculating the transient axial-symmetrical or 2D magnetic fields, coupled with mechanical motion, and excited by voltage source in the solenoidal electromagnet.The method is based on the new model, called differential-integrate equation, which is set up in this paper.And naturally the solution on the equation results in the finite element method is that it can directly solve the transient magnetic field excited by voltage source, and make calculating process easy, and take into account the effect of the eddy currents and nonlinearity in magnetic materials.And the computer storage and computing time will be greatly reduced.The good agreement between calculation and test results indicates that the method proposed is satisfactory.