High reliability EMI filtering module

Abstract

The invention discloses a high reliability EMI filtering module. The high reliability EMI filtering module is characterized in that the high reliability EMI filtering module includes a shielding housing; a sealed cavity is arranged in the shielding housing; common mode choke components which are connected in series and capacitor components which are connected in parallel on the common mode choke components are arranged in the sealed cavity; the capacitor components and the common mode choke components are arranged on a PCB; and the PCB is attached to and fixed on the inner surface of the shielding housing, and is provided with a group of pins extending to the outside of the shielding housing, in an plugged manner. The high reliability EMI filtering module can satisfy the severe environmentof an aerospace system, has relatively higher radiation resistance, and has relatively higher operation stability in the extreme environment of aerospace.

Description

technical field [0001] The invention relates to a filtering module, in particular to a highly reliable EMI filtering module. Background technique [0002] With the development of space technology and aerospace technology, various electronic devices have been widely used in artificial satellites, spacecraft, launch vehicles and other systems. The DC / DC power module is the core of the power system of aerospace electronic equipment, which is used to convert the system bus voltage into the voltage required by the subsystem. The EMI (Electromagnetic Interference) filter module, as an essential key component for suppressing electromagnetic interference at the front end of the DC / DC power module, can effectively suppress the conducted interference generated by the DC / DC power module. [0003] Since various aerospace systems need to face complex and harsh working environments, the single event effect and total dose effect induced by the space environment can cause on-orbit damage, ...

AI Technical Summary

Problems solved by technology

[0003] Since various aerospace systems need to face complex and harsh working environments, the single event effect and total dose effect induced by the space environment can cause on-orbit damage, performance degradation and even failure of spacecraft electronic components. In addition to resisting the strong space radiation during the operation of the spacecraft, it must also withstand the vibration and shock, high vacuum, high temperature and low temperature environment during rocket launch, and because aerospace electronic components are non-repairable and non-replaceable, so the existing technology The ordinary EMI filter module used in the ground environment does not have the all-weather and on-orbit continuous and stable working ability in space, specifically in:

[0004] It cannot be applied to high-radiation space and space. The filter module running on the spacecraft will be subjected to various radiations such as charged particles on the earth and cosmic rays. Space radiation will cause damage and failure of devices to varying degrees; the heat dissipation efficiency of the existing EMI filter module is low , The temperature rises, because the space environment in the space is approximately vacuum, and convection heat dissipation cannot be carried out, so the existing filter module cannot dissipate heat reliably in the high-vacuum space environment, resulting in an excessively high temperature rise, increasing the failure rate of components, reducing The reliability of the whole machine will seriously affect its service life

[0005] In summary, the existing EMI filter modules lack sufficient operational stability and cannot be applied to harsh environments in the aerospace field

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