Protective device for inhibiting power-on surge current

Abstract

The invention relates to spaceborne electronic equipment, and discloses a protective device for inhibiting a power-on surge current. The protective device comprises a surge inhibiting circuit which is formed by arranging an input end overcurrent protective circuit [101] at a power switch end and arranging an integrating circuit [102], a power amplifying circuit [103], a common mode filter [104] and a differential mode filter [105] in sequence after the overcurrent protective circuit [101]; and the surge inhibiting circuit is connected with subsequent electronic equipment through a coupling transformer. By using the protective device, damage or misoperation of a product and even the influence on normal work and the like because of the electromagnetic induction of a starting current of other equipment caused by the power-on surge current of a switching power supply are avoided. The protective device has the advantages of simple design, and stability and reliability at work. The quality and the performance of power supply are improved.

Description

technical field [0001] The invention relates to the technical field of on-board electronic equipment, in particular to a protection device for suppressing startup surge current. Background technique [0002] Surge mainly refers to the powerful pulse generated at the moment when the power supply is just turned on. This is due to the inherent nonlinear characteristics of the switching power supply circuit itself. The startup surge current suppression protection device uses nonlinear components to resist high-frequency surges Sensitive and designed protection circuit. [0003] When the satellite is flying in the territory, some stand-alone machines are turned on and off according to the flight procedures. In order to prevent the surge current generated by these stand-alone machines at the moment of turning on and off from damaging the electronic equipment and control system or causing misoperation, it is required to increase the surge current Inhibition protection device. Wit...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the inrush current is too large when the power supply of the onboard electronic equipment is started and the starting current of other equipment is sensed from the cable, resulting in damage to the onboard electronic equipment or misoperation of other electronic equipment, which affects the reliability of the onboard electronic equipment and service life, etc., the object of the present invention is to provide a protection device that suppresses the surge current at startup

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