摘要
磁场强度分布特性建模直接影响了铸造的成败,并且在电力领域的研究中具有重要意义。针对当前建模结果与实际情况吻合度低的问题,提出基于圆锭电磁铸造的磁场强度分布特性建模。分析磁场的边界条件,计算磁场的电阻、互感和自感,获得磁场强度分布特性的控制方程。在此基础上,根据高斯定理和安培环路定理分析磁场的磁介和磁化电流,利用磁场电流等条件计算磁导率,磁导率会随着磁介的变化而变化,磁性介质中包括大量的磁感应线,磁性介质外还存在少量的磁通量,磁感应线的突出情况由磁导率来决定,通过分析铁芯环路总长、铁芯长度、空隙长度、螺线管缠绕在铁芯环上的匝数等条件之间关系,来计算磁场中磁路所对应的磁阻,获取磁场中磁路对应的横截面积,最终完成对磁场强度分布特性模型的构建。实验结果表明,提出模型的建模结果与实际情况的吻合度较高,验证了提出模型的有效性,并且通过测试磁场电流对磁场强度的影响,进一步证明了提出模型的正确性。
Due to the problem that the current modeling result has low coincidence with the actual situation,this article proposed a modeling method for magnetic field intensity distribution characteristics based on round ingot electromagnetic casting.Firstly,boundary conditions of magnetic field were analyzed.Secondly,resistance,mutual inductance and self-inductance of magnetic field were calculated to obtain the controlling equations of magnetic field intensity distribution characteristics.On this basis,the magnetic medium and magnetization current of magnetic field were analyzed through Gauss theorem and Ampere loop theorem.The magnetic field current was used to calculate the magnetic permeability.The magnetic permeability changed with the change of magnetic medium.The magnetic medium included a large number of magnetic induction lines.Meanwhile,there is a little of magnetic flux outside the magnetic medium.The protrusion of magnetic induction line was determined by magnetic permeability.The relationship among the total length of ring circuit of iron core,the length of iron core,the length of gap and the number of windings of solenoid coils on iron core ring was used to calculate the magnetic resistance and the cross-sectional area corresponding to the magnetic circuit in magnetic field.Finally,the construction of magnetic field intensity distribution characteristic model was completed.Simulation results show that the proposed modeling result has high coincidence with the actual situation.The validity of proposed model is proved.Meanwhile,the correctness of proposed model is further proved by testing the influence of magnetic field current on the magnetic field strength.
作者
郝建红
尹梦宾
范杰清
HAO Jian-hong;YIN Meng-bin;FAN Jie-qing(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing,102206,China)
出处
《计算机仿真》
北大核心
2019年第5期240-243,278,共5页
Computer Simulation
基金
国家自然科学基金项目(61372050)
关键词
圆锭电磁铸造
磁场强度
分布特性建模
Round ingot electromagnetic casting
Magnetic field strength
Distributed feature modeling
