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通过拉力脱载法测定１０种不同材料及设计的磁性固位体的固位力，探讨磁性固位体固位力的影响因素。结果表明：１、应用钕铁硼磁体可显著增加磁性固位体的固位力；２、采用磁体－软磁合金设计具有较多优点且利于增加固位力；３、闭合磁路磁性固位体的固位力显著高于开放磁路因位体；４、不同设计的闭合磁路磁性固位体所获固位力不等，极板式固位体所获固位力最大；５、磁性固位力与磁体和衔铁间距离成反比，随此距离增加，不同设计的磁性固位体固位力下降速率不等。
The retentive force of 10 different materials and designed magnetic retainers was measured by pull-off method, and the influencing factors of retainer force of the magnetic retainer were discussed. The results show that: 1, the use of NdFeB magnets can significantly increase the retention of the magnetic retainer; 2, the use of magnets - soft magnetic alloy design has many advantages and is conducive to increasing retention; 3, closed magnetic circuit magnetic retention Body retention is significantly higher than the open magnetic circuit due to body; 4, different designs of closed magnetic circuit magnetic retainer retainer unequal retention pole plate retainer maximum retention; 5, magnetic Retaining force is inversely proportional to the distance between the magnet and the armature. With this distance increasing, the retention rates of the magnetic retainers with different designs decrease at different rates.