Based on theory analysis of metal solidification and hydrodynamics, momentum convection generated by rotating electromagnetic field do not improve feeding obviously.
据金属凝固理论和磁流体力学分析，电磁搅拌力引起的动量对流对补缩的促进作用并不大。
In rotating machines, the cause of the electromagnetic torque is the electromagnetic force acting on differential volume of the ferromagnetic material in magnetic field.
旋转电机中电磁转矩的产生，可以从作用在磁场内磁性物质单位体积上的电磁力出发加以说明。
In rotating machines, the cause of the electromagnetic torque is the electromagnetic force acting on differential volume of the ferromagnetic material in magnetic field.
旋转电机中电磁转矩的产生，可以从作用在磁场内磁性物质单位体积上的电磁力出发加以说明。
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