An anti-conduction interference circuit for vehicle primary power supply

Abstract

The invention discloses an anti-conduction interference circuit for a vehicle-mounted primary power supply, comprising a first filter module, a high-power diode, a low-pass filter module, a medium-low frequency filter module, a pulse suppression module and a second filter module, and a signal input terminal After the input clutter signal is filtered by the first filter module, the high-power diode suppresses the reverse pulse in the signal and then outputs the first signal and cuts off the power supply when the power supply is reversed. The first signal undergoes high-frequency resonance through the low-pass filter module. After the wave noise interference is eliminated, the second signal is output to the middle and low frequency filter module. After the middle and low frequency filter module performs the middle and low frequency filtering, the pulse voltage is clamped by the pulse suppression module, and then the third signal is output to the second filter module. The third signal After being filtered by the second filter module, it is output from the signal output terminal. The invention has the advantages of stable performance, high safety level, higher high voltage resistance of the primary circuit, better mechanical resistance and higher suppression ratio.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an anti-conduction interference circuit for a vehicle-mounted primary power supply. Background technique [0002] At present, automotive electronic components account for about 30% of the entire vehicle system, and with the development of automotive intelligence, the proportion of automotive electronic components will reach 50% of the entire vehicle system in the future. More and more electronic systems will bring formidable challenges to the EMC (Electronic magnetic compatibility, electromagnetic compatibility) design of the vehicle. [0003] Although the current major automobile manufacturers are increasing the severity level of product compatibility design to varying degrees, but at the same time, it also increases the complexity of automotive circuit design. At the same time, the test period and cost of EMC experiments are relatively high, which increases the cost pressure of vari...

AI Technical Summary

Problems solved by technology

[0003] Although the current major automobile manufacturers are increasing the severity level of product compatibility design to varying degrees, but at the same time, it also increases the complexity of automotive circuit design

At the same time, the test cycle and cost of EMC experiments are relatively high, which increases the cost pressure of various automotive electronics component suppliers

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