Magnetic structures for low leakage inductance and very high efficiency

Abstract

A magentic configuration using a plurality of posts and spiting the primary winding on each of the posts and placing the secondary windings together with the rectifiers menas around each posts to minimise the stray and leakage inductance. In this magentic configurations there is a significant reduction of the core material and a reduction of the footprint by a better utilization of the copper. The magentic field is weaving from through a post to the other minimizing the vertical components and forcing the magentic field to be paralel with the winding reducing the ac copper losses. These properties allows this magentic strcuture to be suitable in very high frequency applications and even in application with air core. These magentic structures can be used for transformer inplementation and also for the inductive applications.

What is claimed is: 
     
         1 . A magnetic circuit element including a circuit board, a plurality in excess of two magnetic flux conducting posts penetrating through the circuit board, at least two magnetic flux conducting plates connecting on both sides the magnetic flux conductive posts, at least two connected primary winding encircling the magnetic posts, and at least two connected secondary winding encircling the magnetic posts. 
     
     
         2 . The magnetic circuit element according to  claim 1  wherein power components are placed in series with the winding and become part of the primary or secondary winding. 
     
     
         3 . The magnetic circuit element according to  claim 1  wherein power components are placed in parallel with the winding and become part of the primary or secondary winding. 
     
     
         4 . The magnetic circuit element according with to  claim 1  wherein the entire magnetic structure is encircled by a suitable shaped, magnetic flux conductive device and interconnections pins are placed inside and outside of the encircling the suitable shaped magnetic flux conductive device, where the pins are connected to a motherboard. 
     
     
         5 . The magnetic element according to  claim 1 , wherein the flux conducting plates are removed. 
     
     
         6 . The magnetic element according to  claim 1 , wherein the flux conducting plates and magnetic flux conductive posts are removed. 
     
     
         7 . A magnetic circuit element with center tap topology including a circuit board, a plurality of magnetic flux conducting posts penetrating through the circuit board, magnetic flux conducting plates connecting on both sides the magnetic flux conductive posts, primary windings encircling the magnetic posts, and secondary windings encircling the magnetic posts, wherein the center tap topology is configured to allow reuse of at least portions of both the primary and secondary windings for current flow in either direction.