阅读说明：本技术 一种高可靠性模压电感的制备方法及其模压电感 (Preparation method of high-reliability molded inductor and molded inductor thereof ) 是由 郭峰 汪贤 黄裕茂 陈赛 许玉成 付邦良 于 2019-09-30 设计创作，主要内容包括：本发明提供了一种高可靠性模压电感的制备方法及其电感。本发明通过改善模压电感线圈绕组变形量及金属粉末对线圈绕组的破损作用使得该方法制备的模压电感解决了模压电感短路问题。具体方法为,(1)通过线圈绕组中心填充预制铁芯实现线圈变形量减少50%及以上,(2)通过提高造粒粉末的松装密度到2.2g/cm3及以上使得线圈变形量减少10%及以上,(3)通过在线圈绕组外缘涂覆3um及以上厚度的磁粉胶,从本质上使得金属粉末在模压过程对线圈的破损作用消失,(4)软磁金属粉末的塑性变形强度σ-(0.2)与模压电感的成型压强之比必须大于等于0.33而小于0.80。该发明的创新之处在于从原理上解决了模压电感在使用过程中的短路问题,具体而言,模压电感耐直流电压达到>=1000V/cm以上。(The invention provides a preparation method of a high-reliability molded inductor and the inductor. The die-pressing inductor prepared by the method solves the problem of short circuit of the die-pressing inductor by improving the deformation of the die-pressing inductor coil winding and the damage effect of metal powder on the coil winding. The specific method comprises (1) reducing coil deformation by 50% or more by filling prefabricated iron core in the center of coil winding, (2) reducing coil deformation by 10% or more by increasing the loose packed density of granulated powder to 2.2g/cm3 or more, and (3) coating magnetic powder glue with thickness of 3um or more on the outer edge of coil windingEssentially the effect of the metal powder on the breakage of the coil during the die-pressing process is eliminated, (4) the plastic deformation strength σ of the soft-magnetic metal powder 0.2 The ratio of the molding pressure to the molding pressure of the molded inductor must be 0.33 or more and less than 0.80. The invention has the innovation that the short circuit problem of the molded inductor in the use process is solved in principle, and particularly, the molded inductor resists direct-current voltage to reach>And (5) =1000V/cm or more.)