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Compact EMC filter

A filter, compact technology, applied in the field of filters, can solve the problems of parasitic parameters increase, filter EMI performance reduction, etc., to achieve the effect of reducing parasitic parameters, reducing filter volume, and improving heat dissipation efficiency

Pending Publication Date: 2022-05-10
SHENZHEN VMAX NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to structural design problems in existing three-phase power filters, there is usually a PCB overlap between the input and output printed circuit board traces of the common mode inductor, and this will increase the parasitic parameters, resulting in filter EMI reduced performance

Method used

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] The invention discloses a compact EMC filter, see Figure 4 The schematic diagram of the three-dimensional layout of the preferred embodiment shown, the EMC filter includes an inductance core and a winding body 401, an X / Y capacitor group 405, and the inductance core and the winding body 401 include at least one inductance core and at least one inductor winding, the inductance winding is wound on the inductance magnetic core and extends out a plurality of inductance winding pins 402, and the inductance winding pins 402 are welded on the induction welding plate 403; the induction welding p...

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Abstract

The invention discloses a compact EMC filter which comprises a shielding shell (408), a capacitor welding plate (406), an X / Y capacitor bank (405) and an inductor welding plate (403). An inductor magnetic core and a winding body (401) are installed in the shielding shell (408) in an overlapped mode from top to bottom. A three-dimensional arrangement mode is adopted, the filter inductors and the filter capacitors are arranged in a laminated mode in the height space, the height space is fully utilized, and through simple wiring connection on the PCB, inductor winding outlet pins with a large number and limited outlet pin positions can be adjusted into adapter outlet pins with a small number and regular outlet pin positions; the reasonable positions of the inductor winding pins and the transfer pins ensure that the wires on the bottom board PCB are not crossed between the front stage and the rear stage of each filter inductor, the coupling capacitance parasitic parameters between the front stage and the rear stage of each filter inductor are reduced, the EMC high-frequency performance is improved, the heat dissipation efficiency is improved, and the size of the filter is reduced.

Description

technical field [0001] The invention relates to a filter, in particular to a compact EMC filter suitable for a vehicle charger. Background technique [0002] With the development of demand for new energy vehicles, the EMC performance of on-board high-voltage components has become a core technical indicator. At the same time, the lightweight and miniaturization of high-voltage components has also become an important development direction. It is a very challenging technical problem to achieve both excellent EMC performance and miniaturization of components. Filter design is a key piece of this technical puzzle. Due to structural design problems in existing three-phase power filters, there is usually a PCB overlap between the input and output printed circuit board traces of the common mode inductor, which will increase the parasitic parameters and cause filter EMI Reduced performance. [0003] Therefore, how to design an EMC filter with reasonable layout, compact structure ...

Claims

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Application Information

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IPC IPC(8): H02M1/12H02M1/44
CPCH02M1/12H02M1/44Y02E40/40
Inventor 冯颖盈姚顺刘骥汪洋
Owner SHENZHEN VMAX NEW ENERGY CO LTD