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Planar electromagnetic interference (EMI) filter integration module consisting of circular printed circuit board (PCB) wire turns

A technology of integrated modules and filters, which is applied in the field of planar magnetic integrated structures, can solve problems affecting filter performance, reduce conductor utilization, and uneven current distribution, achieve volume reduction, improve high-frequency performance, and increase utilization rate effect

Inactive Publication Date: 2010-10-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of modern power electronics towards high frequency, the current distribution is very uneven at the direct corners, which seriously affects the filter performance
Part of the helical coil that constitutes the planar LC structure is outside the magnetic core, which reduces the utilization rate of the conductor and cannot effectively generate sufficient inductance. At the same time, because the PCB board that constitutes the planar integrated LC structure uses ceramic materials with high dielectric constant, Ceramic material is brittle and difficult to install

Method used

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  • Planar electromagnetic interference (EMI) filter integration module consisting of circular printed circuit board (PCB) wire turns
  • Planar electromagnetic interference (EMI) filter integration module consisting of circular printed circuit board (PCB) wire turns
  • Planar electromagnetic interference (EMI) filter integration module consisting of circular printed circuit board (PCB) wire turns

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Embodiment Construction

[0028] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0029] Such as Figure 2A In the shown example, the planar EMI filter integrated module that a kind of circular PCB coil turn provided by the present invention constitutes comprises a pot-shaped magnetic core 201, two differential mode capacitors 201 and 210, four common mode inductors I203, 204, 208 and 209, two integrated LC structures 205 and 207, and one leakage inductance layer 206. Differential Mode Capacitance ( Figure 5A ) of A 1 and B 1 As the input terminal of the filter is led out by wires, C 1 connected to the common mode inductance layer 203 ( Figure 4A ), the common mode inductance layers 203 and 204 are coupled in series in the forward direction, and the F point of the common mode inductance layer 204 is connected to the point A of the integrated LC structure ( Figure 3A ), the common-mode inductance layer 203, the common-mode in...

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Abstract

The invention discloses a planar EMI filter integration module consisting of circular PCB wire turns, which belongs to a planar magnetic integration structure of an EMI power filter. The module comprises a pot-shaped magnetic core (201), common mode inductance layers I, II, III and IV (203, 204, 208 and 209), differential mode capacitors I and II (202 and 210), common mode integrated LC structures I and II (205 and 207) and a leakage inductance layer (206). The integration structure of the invention has a relatively smaller volume, is easy to arrange, improves the utilization rate of a conductor, makes high-frequency current uniformly distributed on a planar spiral coil, improves the insertion loss of the filter, improves the high-frequency performance of the filter and can be applied to a front-end converter in a distributed power system.

Description

technical field [0001] The invention relates to a planar EMI filter integrated module composed of circular PCB coil turns, which belongs to the planar magnetic integration structure of EMI power filter. Background technique [0002] The switching operation of power devices in various power electronic devices causes extremely large voltage or current pulses, which cause severe electromagnetic interference (EMI). These disturbances form conduction and radiation disturbances through near-field and far-field coupling, seriously polluting the electromagnetic environment and power supply system. For conducted interference, using EMI filter for filtering is a very effective and economical means. Properly connecting this type of filter between the power supply and the load can not only prevent the noise generated by power electronic devices from being conducted into the power grid, but also It can prevent various high-frequency noises in the power grid from entering power electroni...

Claims

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Application Information

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IPC IPC(8): H03H7/09H01F17/04
Inventor 王世山周小林武丽芳崔永生
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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