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EMI filter module based on magnetic integration

A filter and magnetic integration technology, which is applied in the direction of inductors with magnetic cores, impedance networks, electrical components, etc., can solve the problem that the filtering performance is greatly affected by temperature and frequency changes, so as to reduce the requirements for dielectric materials and improve Performance stability, size reduction effect

Inactive Publication Date: 2010-10-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a magnetically integrated EMI filter module that can use materials with a lower dielectric coefficient, thereby overcoming the temperature and frequency variation of the filter performance caused by the use of high dielectric coefficient ceramic materials in the prior art high impact issues

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  • EMI filter module based on magnetic integration
  • EMI filter module based on magnetic integration
  • EMI filter module based on magnetic integration

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Embodiment Construction

[0017] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0018] An EMI filter module based on magnetic integration, as attached figure 1 As shown, it includes a magnetic core, a common-mode inductance layer, a common-mode integrated inductance structure, a leakage inductance layer and a differential-mode capacitor, wherein the magnetic core includes a pot core 301 and a flat core 311, and the differential-mode capacitor includes Differential mode capacitor I 302 and differential mode capacitor II 310, common mode inductor layer includes common mode inductor layer I 303, common mode inductor layer II 304, common mode inductor layer III 308 and common mode inductor layer IV 309, common mode integrated inductor structure includes common mode integrated inductor Capacitive structure I305 and common-mode integrated inductive structure II307; common-mode inductive layer I303, common-mode inductive layer II304 and c...

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Abstract

The invention discloses an EMI filter module based on magnetic integration, which comprises a magnetic core, a common-mode inductance layer, a common-mode integrated inductance-capacitance structure, a leakage inductance layer and a differential-mode capacitor. The differential-mode capacitor is a laminated capacitor, and the common-mode inductance layer consists of a single-layer plane spiral coil. Since the laminated capacitor is used as the differential-mode capacitor, the invention reduces the requirements for the dielectric material in the differential-mode capacitor, and the dielectric material with good temperature, high frequency sensitivity but low dielectric constant can be used, thereby solving the problems of high temperature and high frequency due to the use of the material with the high dielectric constant in the prior art, and improving the performance stability of the EMI filter module; and since the single-layer spiral coil is used as the common-mode inductance layer, the invention reduces the size of the EMI filter module.

Description

technical field [0001] The invention relates to a passive electronic component, in particular to an EMI filter module. Background technique [0002] Magnetic integration technology is to integrate all the main magnetic devices in the switching power supply together structurally, and realize it with one magnetic device, so that the number of devices in the switching power supply can be reduced, the volume of the switching power supply can be reduced, and the power of the switching power supply can be increased. Density, so that the contact between the magnetic parts is the shortest, the loss is the smallest, and the output filtering effect is improved to adapt to the low-voltage high-current switching power supply, and truly realize the "short, small, light, thin" switching power supply. At present, the modularization and miniaturization of power electronic equipment and magnetic integration technology have become the focus and hot spot of current research. [0003] Traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/09H01F17/04
Inventor 周小林王世山武丽芳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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