Structuring method of novel matrix form coupling inductor with multiple degrees of freedom

Abstract

The invention discloses a structuring method of a novel matrix form coupling inductor with multiple degrees of freedom. The coupling inductor comprises a plurality of matrix form coupling inductance units, wherein each coupling inductance unit comprises a self-induction unit inductor and a mutual induction unit inductor, and the self-induction unit inductor is formed by forwardly integrating two windings on a single magnetic core; the mutual induction unit inductor is formed by reversely coupling two windings on a single magnetic core; and the coupling inductance units realize magnetic integration among a plurality of windings through array-formed permutation and combination and circuit connection. Due to adoption of a matrix form structure, the coupling inductor designed by the invention can greatly increase the heat radiating area of the magnetic cores and reduce the thermal loss of the magnetic cores, and also has structural universality and expansibility; the number of the magnetic cores of the coupling inductance units can be increased for randomly expanding the phase number of the coupling inductor; and in a full duty ratio working mode, the steady-state output waveform of the VRM of the coupling inductor is smooth and few in burrs, so the coupling inductor has stable output capability.

Description

technical field [0001] The present invention relates to the technical field of coupled inductors used in multi-phase interleaved converters, in particular to the field of array-type planar integrated magnetic parts, specifically a novel matrix multi-degree-of-freedom coupled inductor suitable for multi-phase interleaved coupled converters The construction method. Background technique [0002] The use of interleaved parallel magnetic integration technology based on coupling magnetic parts in the multi-phase voltage conditioning module (VRM) can significantly improve its steady-state input and output ripple characteristics, improve the dynamic characteristics and conversion efficiency of the converter, and make it easier to obtain high The power density has attracted much attention. [0003] The optimal design of the integrated inductor is an important factor affecting the steady-state and transient performance of the VRM. A reasonable coupling degree can improve the output d...

AI Technical Summary

Problems solved by technology

The existing literature shows that when using the existing magnetic core to construct the multi-winding integrated inductor with the overall magnetic core structure, it is usually necessary to increase the height, volume and quantity of the magnetic parts, which is not conducive to achieving high power density; and the magnetic core with a special structure is also Open mold design is required, which increases the design cost; at the same time, the winding and magnetic circuit of the integral magnetic core structure integrated inductor are too concentrated, which is easy to cause local hot spots to be too high, resulting in increased loss of magnetic parts

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