| 摘要 |
<p>PURPOSE:To sufficiently recover the permeability of a core and to improve the characteristics by a method wherein a filling material including a magnetic fluid is interposed between both split faces of divided cores and this filling material is set up while applying a magnetic field in a direction crossing the split faces. CONSTITUTION:After polishing split faces 54, 54 of both split cores 51, 51 by abrasive grains of 30mu, a windings 52 is wound around the split core 51. Meanwhile, a filling material 12 consisting of a magnetic fluid manufactured by a co-precipitation method is spread over split faces 54, 54. After coating of this filling material 12, a direct current is allowed to flow in the windings 52, 52 while the split cores 51, 51 are in contact with each other with a slight pressure. Then, a magnetic field B is applied in a direction which crosses the split faces 54, 54. At a result, the filling material 12 can get into all cracks or recesses in a gap caused by a magnetic force, meanwhile the filing material 12 swells outward along a line of magnetic force B1.</p> |
