直流电磁泵磁感应强度数值模拟

Numerical Simulation on Magnetic Flux Density in Direct Current Electromagnetic Pump

针对液态金属传输用直流电磁泵内部磁场区域的磁场分布问题,建立了电磁铁三维有限元模型并进行模拟计算,探究了电磁铁不同聚磁头截面尺寸、励磁电流大小和线圈匝数对聚磁头间隙处磁感应强度分布的影响。结果表明,聚磁头截面尺寸为铁芯截面尺寸的50%~60%时磁隙处磁感应强度最强;随励磁电流的增大,线圈匝数的增加,磁隙处磁感应强度均呈现增长趋势,受铁芯材料特性影响,励磁电流与线圈匝数分别在1 300 A和20匝时,磁隙处磁感应强度达到饱和状态。

A 3 D FEM simulation of electromagnetic zone was carried out to analyze the magnetic field in direct current electromagnetic pump which was used for fluid metals transfer, and then the influence of magnetic head gap magnetic flux density in different sectional dimension of concentrating magnetic head, various current value as well as coil turns were studied. The results show that the peak value of magnetic flux density is obtained when the concentrating magnetic section size is 50~60% of core section size, and magnetic flux density in gap increase with the increase of current value and coil turns. Magnetic flux intensity achieve saturation state when current value is 1300 A and coil turns are 20 as the effect of iron core material properties.