Multi-functional ferrite core

Abstract

The invention provides a multi-functional ferrite core which is characterized in that one bottom surface of the multi-functional ferrite core is square or rectangular; the center part of the bottom surface is provided with a cylinder; four wire leading slots which facilitate the wiring of multiple layers of PCB (printed circuit board) windings are arranged at the periphery of the cylinder; four square or rectangular corners are respectively provided with an edge leg in a shape similar to a polyhedron cross section, and respectively matched with an square or rectangular magnetic sheet which has a same size with the corners or matched with a magnetic core which has a same shape and size with the corners, thus forming a low magnetic core capable of being provided with a multi-winding transformer; and air gaps or no air gaps exist between the cylinder of the magnetic core and the magnetic sheets or between the cylinders. The multi-functional ferrite core provided by the invention has the advantages that the magnetic shield and heat dissipation characteristics are better considered, and high power density, a multiplexed output function and multifunction can be realized.

Description

technical field [0001] The invention relates to a soft ferrite core, in particular to a low profile multipurpose ferrite core. Background technique [0002] 1) The common ferrite cores used for miniaturized switching power supplies or DC-DC converter transformers are large in size and high in installation height, and it is difficult to balance the convenience of multi-winding outlets, heat dissipation performance and magnetic shielding. Contradictions, cannot well adapt to the current development trend of electronic products miniaturization, thinning, high power density and good electromagnetic compatibility; [0003] 2) The existing low-profile EE, EI, and ER magnetic cores are the most commonly used shapes, but they can only be routed from both sides, which is not very convenient for multi-winding and multi-output designs; due to the large openings on both sides, there are many The winding "overflow", the magnetic shielding effect is not ideal, and it is easy to generate ...

AI Technical Summary

Problems solved by technology

[0002] 1) The common ferrite cores used for miniaturized switching power supplies or DC-DC converter transformers are large in size and high in installation height, and it is difficult to balance the convenience of multi-winding outlets, heat dissipation performance and magnetic shielding. Contradictory, cannot well adapt to the current development trend of electronic products miniaturization, thinning, high power density and good electromagnetic compatibility;

[0003] 2) The existing low-profile EE, EI, and ER magnetic cores are the most commonly used shapes, but they can only be routed from both sides, which is not very convenient for multi-winding and multi-output designs; due to the large openings on both sides, there are many The winding "overflow", the magnetic shielding effect is not ideal, and it is easy to generate radiated electromagnetic interference;

[0004] 3) Although the existing low-profile pot-shaped magnetic core has excellent magnetic shielding effect and high magnetic efficiency, its heat dissipation performance is poor, and it is impossible to realize multi-winding outlets, and when the air gap needs to be ground by the central column, in order to avoid If the side legs are damaged, the air gap cannot be continuously processed by a through-type grinder, and it can only be processed in a single piece, with low efficiency and high cost

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