| 摘要 |
<p>A permanent magnetic system for adhesion purposes, specifically a clamping plate, comprising individual permanent magnets inserted into a ferro-magnetic housing and a cover plate of ferro-magnectic material covering the permanent magnets and the housing and used as an adhesion surface, said cover plate seating directly on the pole surfaces of the permanent magnets and having a thickness so dimensioned in relation to the magnetic flux of force of the permanent magnets that it provides a magnetic stray field exceeding the magnetic saturation. In this way, the cover plate located in a partly magnetic short circuit represents on the total pole surface of the permanent magnet system a directly magnetic connection to the blank, whereby its magnetic stray field, magnetically shorted via the blank, thus is included into the existing partial magnetic short circuit. Because the magnetic flux of force is effectively made to possess and optimal value in the magnetic short circuit, a sure guaranty is created for the desired adhesion.</p> |
