An electrostatic discharge pulse suppression device for electromagnetic compatibility testing

By designing an electrostatic discharge pulse suppression device and employing multi-stage overvoltage protection and filtering decoupling units, the problem of functional failure in electrostatic discharge tests was solved. This enabled accurate determination of electrostatic protection performance while maintaining communication connectivity, thus improving the applicability of electromagnetic compatibility tests.

CN116930577BActive Publication Date: 2025-11-04SHANGHAI METROLOGY & TESTING TECHNOLOGY RESEARCH INSTITUTE CO LTD
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Patent Information

Application Number
CN202311022325.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-14
Publication Date
2025-11-04
Estimated Expiration
2043-08-14

AI Technical Summary

Technical Problem

In electrostatic discharge pulse tests, existing technologies struggle to accurately determine the anti-electrostatic interference performance of the test sample and auxiliary equipment while maintaining product functionality and performance, and conventional protective measures may lead to functional failure or performance degradation.

Method used

An electrostatic discharge pulse suppression device was designed, comprising a shielded encapsulation shell, an electrostatic discharge pulse suppression circuit board, and multi-stage overvoltage protection, pulse suppression unit, and filtering and decoupling unit. It effectively suppresses and protects against electrostatic pulses through a low-impedance interface and pluggable switches.

Benefits of technology

Maintaining uninterrupted communication during electrostatic discharge pulses enables accurate assessment of the electrostatic protection performance of individual units, improves the applicability and accuracy of electromagnetic compatibility testing, and prevents functional failure or performance degradation.

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Abstract

The application relates to an electrostatic discharge pulse suppression device for electromagnetic compatibility detection, which comprises a shielding packaging shell, an electrostatic discharge pulse suppression circuit board in the shielding packaging shell, and an A port and a B port at two ends of the shielding packaging shell, wherein the A port and the B port each comprise a 2-wire port, an 8-wire Ethernet port and a vehicle-mounted Ethernet port which are connected with each other, an A-end overvoltage protection unit, an A-end first-stage pulse suppression unit, an A-end second-stage pulse suppression unit, an A-end filtering decoupling unit, a B-end filtering decoupling unit, a B-end second-stage pulse suppression unit, a B-end first-stage pulse suppression unit and a B-end overvoltage protection unit are sequentially connected on the electrostatic discharge pulse suppression circuit board, the A port is an input end of the A-end overvoltage protection unit, the B port is an input end of the B-end overvoltage protection unit, and the shielding packaging shell is grounded. The electrostatic discharge pulse suppression process can be realized while the communication connection is not interrupted; the port versatility is high, and the applicability of the electromagnetic compatibility test is greatly improved.
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