Multi-phase symmetrical integrated magnetic component of magnet yoke closed type

Abstract

The invention provides a multi-phase structure and parameter symmetrical integrated magnetic component of a magnet yoke closed type, and relates to the technical field of power electronics application. The transformer comprises an iron core, a multi-phase primary winding and a multi-phase secondary winding; the iron core comprises a magnet yoke, a plurality of main magnetic columns and auxiliary magnetic columns. The magnet yoke is of a closed symmetrical loop structure. One ends of the plurality of main magnetic columns are connected, and the other ends of the plurality of main magnetic columns are respectively connected with the magnet yoke; included angles among the plurality of main magnetic columns are equal, the plurality of auxiliary magnetic columns are symmetrically positioned among the plurality of main magnetic columns, and the multiphase primary side winding and the multiphase secondary side winding are symmetrically wound on the plurality of main magnetic columns. The beneficial effects of the invention are that the multi-phase structure and parameter symmetrical integrated magnetic component is used for magnetic coupling integration of multi-phase inductors and transformers in power conversion circuits of various non-isolated multi-phase parallel switching power supplies and isolated multi-phase parallel switching power supplies, structural symmetry and equal parameters of the multi-phase magnetic integrated inductor and the transformer are achieved, and high-power output of the multi-phase parallel switching power supplies and automatic balance of currents ofall phases are achieved.

Description

technical field [0001] The invention relates to a multi-phase integrated magnetic part, in particular to an integrated magnetic part with closed yoke multi-phase structure and parameter symmetry (including transformer with multi-phase structure and parameter symmetry) for various multi-phase parallel power conversion circuits , coupled inductors, integrated magnetics for transformers and inductors). [0002] technical background [0003] In recent years, switching power supplies that provide electrical energy for various electrical equipment are developing in the direction of low voltage, high current, small size, light weight, high efficiency, thinness and integration, including for the central processing unit (Central Processing Unit) of computers. , CPU) and Digital Signal Processing (Digital Signal Processing, DSP) and other high-precision, high-speed microprocessors to provide precision power supply voltage adjustment modules, as well as widely used in electric vehicles,...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the present invention provides a multi-phase integrated magnetic part (including a multi-phase transformer and a multi-phase coupled inductor) with a closed yoke and symmetrical structure and parameters to solve the problems in the existing multi-phase parallel switching power supply equipment. Due to the unequal inductance parameters of multi-phase discrete magnetic parts (including transformers and inductors) or the asymmetric structure of multi-phase integrated magnetic parts, the unequal inductance parameters of each phase cause the problem of unequal currents in each phase, and realize multi-phase High power, high transformation ratio, small size, low current fluctuation, high response speed and bi-directional high efficiency operation of parallel switching power supply

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