1190results about "Magnetic core manufacture" patented technology

A magnetic device comprises a lead frame, a first core body and a coil. The lead frame has a first portion and a second portion spaced apart from the first portion. A first core body is disposed on the lead frame, wherein the first core body comprises a first through opening and a second through opening. A coil is disposed on the first core body, wherein the coil has a first terminal and a second terminal, wherein the first portion is electrically connected with the first terminal via the first through opening, and the second portion is electrically connected with the second terminal via the second through opening, respectively.

A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed thereon, the layer stack including a perpendicular recording layer containing a plurality of columnar-shaped magnetic grains extending perpendicularly to the substrate surface for a length, with a first end distal the surface and a second end proximal the surface, wherein each of the magnetic grains has: (1) a gradient of perpendicular magnetic coercivity H_k extending along its length between the first end and second ends; and (2) predetermined local exchange coupling strengths along the length.

An electronic filter assembly includes a magnetically conductive annular body extending around a center axis, a set of magnetically conductive prongs radially extending from the center axis toward the annular body, and conductive windings extending around the prongs. The conductive windings can be disposed around the prongs instead of the annular body to assist in conduction of common mode magnetic flux, to reduce impedance of the filter assembly, and/or to more evenly distribute temperature in the filter assembly. A method for forming an electronic filter assembly includes forming an electronic filter assembly having a magnetically conductive annular body extending around a center axis and a set of magnetically conductive prongs radially extending from the center axis toward the annular body. The annular body and the prongs can be formed by coupling plural layers of magnetically conductive bodies together.

An inductive component and a method for producing an inductive component are disclosed. In an embodiment, the inductive component includes a first core part having wound first and second wires and a second core part arranged on the first core part. In various embodiments the inductive component has a low mode conversion, a low inductance in differential-mode operation, a high inductance for common-mode signals, a constant characteristic impedance, a low capacitive coupling of the wires, and/or a low leakage inductance.

Novel methods for micro-additive manufacturing three dimensional sub-millimeter components are disclosed herein. The methods can include dispensing a dielectric at positions on a substrate so as to provide dielectric structures having an aspect ratio of up to 1:20. The methods can also include in-situ curing of the dielectric structure upon dispensing of the dielectric wherein the dispensing and curing steps provide for three dimensional configurations. Direct printing a metal nanoparticle solution on the dielectric to create conductive traces and thereafter sintering the printed nanoparticle solution so as to cure the conductive traces enables three dimensional conductive (antenna) elements having a length and width scale of down to 1 μm.

Electromagnetic assemblies, core segments that form the same, and their methods of manufacture. The segments have an interlocking engagement, whereby a variety of assemblies can be produced from a very small number of similar or complementary segments in a manner that provides excellent mechanical stability. The articles and methods of formation offer design flexibility and provide for a large variety of patterns from a small number of primary shapes, provide an economical manufacturing method for large transformer and inductor cores, and improve uniformity of magnetic properties of the assemblies when compared to conventional practices.

An armature manufacturing method of forming an armature including an arm holding a printing wire, and magnetic circuit forming members attached to the arm places the magnetic circuit forming members on the arm with a resistive layer of a resistive material having high electric resistance sandwiched between the arm and each of the magnetic circuit forming members, and welds together the arm and the magnetic circuit forming members with the resistive films sandwiched between the arm and the magnetic circuit forming members by spot welding. The arm and the magnetic circuit forming members of the armature can be joined together by welds having a high weld strength.

The invention discloses a thin film inductor which comprises a thin film magnetic core. The thin film magnetic core comprises multiple magnetic columns, a first end and a second end. The multiple magnetic columns are arranged at intervals and are in a rod shape. One end of each magnetic column makes contact with the first end, and the other end of each magnetic column makes contact with the second end. The multiple magnetic columns comprise two or more winding magnetic columns and one non-winding magnetic column which is located on one side of the winding magnetic columns; or the multiple magnetic columns comprise two or more winding magnetic columns and two non-winding magnetic columns, wherein the winding magnetic columns are located between the two non-winding magnetic columns. The thin film magnetic core comprises at least one layer of magnetic thin film. The area, located at the first end and the second end and located between the adjacent winding magnetic columns, in each layer of magnetic thin film is provided with at least one first gap. The length direction of each first gap is parallel to the difficult magnetization direction of the corresponding magnetic thin film. The magnetic thin films are stacked and overlaid, and the sum of the widths of all the first gaps in each layer of magnetic thin film is the same.

Toroidal inductive devices are manufactured with high efficiency through the use of bobbin winding techniques or wound magnetic pattern members.

The invention discloses a full-automatic mutual inductor magnetic core strip winding device. The device comprises a mutual inductor magnetic core winding roll, a magnetic core winding cutting fixed block and a magnetic core winding cutting movable block, wherein a magnetic core strip fixed cutting disc is arranged at the top of one end, toward the mutual inductor magnetic core winding roll, of the magnetic core winding cutting fixed block; a magnetic core strip movable cutting disc is arranged at the end, toward the magnetic core strip fixed cutting disc, of the magnetic core winding cutting movable block and is matched with the magnetic core strip fixed cutting disc; a strip winding arc inductive face is arranged on the magnetic core winding cutting fixed block, and faces the surface of the mutual inductor magnetic core winding roll; an upper winding terminal inductor and a lower winding terminal inductor are respectively arranged at the upper end and the lower end of the strip winding arc inductive face. The device can be used for cutting of a continuous mutual inductor magnetic core strip and adhering the mutual inductor magnetic core strip to the magnetic core roll surface, and can accurately determine the quantitative winding terminal of the mutual inductor magnetic core strip.

A method for making an inductor comprises following steps: (a) preparing a magnetic core from a first magnetic component through cold pressing and moulding; (b) heating the magnetic core; (c) windingthe coil section of a wire around the heated magnetic core so that opposite bonded sections of the wire can extend in a direction opposite to the magnetic core from two opposite ends of the coil section; and (d), after the step (c), putting the wire wound magnetic core in a die, filling a second magnetic component in the die, and carrying out hot pressing moulding to form a magnetic shell that wraps the magnetic core and the coil section of the wire. The invention also provides an inductor prepared by the method mentioned above. The cold-press moulded magnetic core has the advantages of low relative magnetic permeability and high saturated current value. The hot-press moulded magnetic hell has high relative magnetic permeability and wraps the magnetic core and the coil section. The numberof turns of the coil section is not increased, the required inductance is reached, the heat caused by DC resistance is reduced, and the saturated current value is compensated at the same time.

The present invention relates to a common mode filter and a method of manufacturing the same. In order to implement a common mode filter with low shrinkage, high substrate sintered density, and high strength, the present invention provides a common mode filter including: a lower substrate; an insulating layer having a conductor pattern inside and provided on the lower substrate; an upper substrate provided on the insulating layer; and a ferrite core made of ferrite and provided in the center of the insulating layer, the lower substrate, and the upper substrate by penetrating the insulating layer, the lower substrate, and the upper substrate, and a method of manufacturing the same.

The invention relates to a magnetic material automated production line and is in the order of magnetic tile pressing, detecting, conveying, warehouse entry and sintering. The production line is characterized in that a pressing machine 2, a sorting table, a visual defect detecting mechanism 6 used for detecting magnetic tiles 1 on the sorting table, a robot 8 used for taking the magnetic tiles 1, a palletizing platform 9 used for disposing the magnetic tiles 1 and an ID card in a tray, a tray scanner 10 used for scanning the tray ID card information, a conveyor belt 11 used for conveying the tray (the magnetic tile tray, the same below) loaded with the magnetic tiles 1 to a sintering furnace, the sintering furnace 15, a printer system 16, an empty tray return system and a control system having the system scheduling function, wherein the control system includes a server connected with a PC industrial control computer, a tray scanner system, a PLC controller, and a defect identification system and a label printing system connected with the server, motion parts are respectively controlled by PLC, and the control system is used for acquiring and analyzing PLC controller instructions and the induction information and making instructions. The production line is advantaged in that production cost is reduced, production efficiency is improved, product consistency is improved, inspection standards are unified, and the information management level is improved.

A planar transformer comprises a laminate substrate having an opening with metal traces wound thereabout forming a primary and a secondary winding, a core configured to fit inside the opening to enclose the laminate substrate. At least one heat sink fin is integrally formed with the top, bottom or both sides of the core. A method of forming a planar transformer comprises laminating a substrate having an opening with metal traces wound thereabout forming a primary and a secondary winding, fitting a core inside the opening, and enclosing the laminate substrate. One of the top, bottom or both sides of the core include one or more heat sink fins.