Abstract: A power circuit common mode filter includes: a U-shaped soft magnetic core and two cylindrical soft magnetic cores, wherein recessed grooves are provided at tops of two side walls of the U-shaped soft magnetic core, and the two cylindrical soft magnetic cores are movably installed in the U-shaped soft magnetic core; two ends of each of the cylindrical soft magnetic cores are embedded in the corresponding recessed grooves, and a coil is set on each of the two cylindrical soft magnetic cores in the U-shaped soft magnetic core; the U-shaped soft magnetic core and the cylindrical soft magnetic cores are both covered with a high-voltage-resist insulating material to form insulating layers; surfaces of the insulating layers at the recessed grooves are provided with electrode layers, and ends of the coil is fixedly connected to the electrode layers through soldering tin.

Abstract: A method for preparing a metallic magnetic powder core integrated chip inductor, includes steps of: winding a spiral coil, compression molding, chamfering, curing, insulation coating, grinding, electrode copper plating. The integrated chip inductor of the present invention iterates the current industry's technology of paste-terminated electroplating integrated inductors, copper chip terminal electrode integrated inductors, and built-in T-shaped magnetic core pendulum winding electrode products, thereby reducing the installation size of the product on the circuit board increases the installation space of the integrated circuit PCB board. The present invention can realize intelligent manufacturing, achieve resource saving and environmental friendliness, and can create unique value for the development of the world's electronic industry.

Abstract: A method for preparing a metallic magnetic powder core integrated chip inductor is provided, comprising steps of: winding a hollow spiral coil, compression molding, primary chamfering, hot pressing curing, secondary chamfering, primary nano-insulation coating, primary grinding, electrode copper plating, secondary nano-insulation coating, secondary grinding, electroplating metalized electrode, and testing packaging. The metallic magnetic powder core integrated chip inductor of the present invention adopts nano-insulating material to cover the product body and only retains the bottom electrode for connection, which eliminates tin stacking side area comparing to the paste terminated electroplating type and the material spot welding electrode type integrated chip inductor product, and thus reduce the installation volume of the product on the circuit board, increase the installation density of electronic components on the PCB board.

Abstract: A power circuit common mode filter includes: a U-shaped soft magnetic core and two cylindrical soft magnetic cores, wherein recessed grooves are provided at tops of two side walls of the U-shaped soft magnetic core, and the two cylindrical soft magnetic cores are movably installed in the U-shaped soft magnetic core; two ends of each of the cylindrical soft magnetic cores are embedded in the corresponding recessed grooves, and a coil is set on each of the two cylindrical soft magnetic cores in the U-shaped soft magnetic core; the U-shaped soft magnetic core and the cylindrical soft magnetic cores are both covered with a high-voltage-resist insulating material to form insulating layers; surfaces of the insulating layers at the recessed grooves are provided with electrode layers, and ends of the coil is fixedly connected to the electrode layers through soldering tin.