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磁场强度随着离磁极的距离增加,而按指数关系显著减小的公式H=H_0e~(-cx),在弱磁场磁选设备理论设计中,对磁系的极距、极数、磁场强度等的确定起重要的作用。原理论推导中没有指明其边值条件,将该式作为全体开放型平面磁系的磁场强度的方程式,其实并不然。本文主要阐述H=H_0e~(-cx)的边值条件及分离变量法的推导过程。
The magnetic field intensity increases with the distance from the magnetic pole, and the index H = H_0e ~ (-cx), which is significantly reduced by the exponential relationship. In the theoretical design of weak magnetic field magnetic separation equipment, the pole pitch, pole number, magnetic field strength The determination of such plays an important role. The original theory did not specify its boundary conditions, the formula as the open magnetic field of all open-type magnetic field equations, in fact, not the case. This paper mainly expounds the boundary condition of H = H_0e ~ (-cx) and the derivation process of the method of separating variables.