Electro-magnetic interference detecting system for power line conduction

A technology for conducting electromagnetic interference and detection systems, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of complex EMI test systems and difficulty for testers to master, and achieve convenient and reliable detection process, easy operation, and detection system simple effect

Inactive Publication Date: 2013-06-19
TIANJIN TEAMWELL DETECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current EMI test system and process are very complicated, and it is difficult for ordinary testers to master, so the test technology in this area needs to be improved urgently

Method used

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  • Electro-magnetic interference detecting system for power line conduction
  • Electro-magnetic interference detecting system for power line conduction
  • Electro-magnetic interference detecting system for power line conduction

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited.

[0018] The power line conduction electromagnetic interference detection system of the present invention includes the following parts: EMI receiver, linear impedance stabilization network (LISN), current probe, which are connected into a system in turn (see attached figure 1 ).

[0019] The EMI receiver includes the following parts (see attached figure 2 ): Input attenuator, preselector, high frequency amplifier, mixer, IF filter, envelope detector, detector weighting, local oscillator.

[0020] The working process of the EMI receiver is: first neutralize the input RF signal processed by the attenuator, preselector, and amplifier with the mixer; by adjusting the frequency of the local oscillator, a fixed intermediate frequency can be obtained; then through the intermediate frequency filter After processing, the resolution of the anal...

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Abstract

An electro-magnetic interference detecting system for power line conduction is provided. The electro-magnetic interference detecting system for the power line conduction comprises an electro-magnetic interference (EMI) receiver, a line impedance stabilization network (LISN), a current probe, a voltage probe, an impedance analysis meter and an oscilloscope, wherein the EMI receiver, the LISN, the current probe, the voltage probe, the impedance analysis meter and the oscilloscope are sequentially connected to form a system. The electro-magnetic interference detecting system for the power line conduction is simple and convenient and reliable in the detection process, and facilitates operation of technicians.

Description

technical field [0001] The invention relates to an electromagnetic interference detection system for electrical and electronic equipment, in particular to a power line conduction electromagnetic interference detection system. Background technique [0002] During the normal operation of electrical equipment, strong electric / magnetic fields will inevitably be generated, and these electromagnetic energy will form unnecessary electromagnetic interference (EMI), which requires great attention. [0003] Electromagnetic interference refers to the interference phenomenon that the performance of electrical equipment or the entire system is degraded by electromagnetic disturbance. According to the principle and propagation mode of EMI, it can be divided into two categories: conducted interference and radiated interference. In the low frequency range, the EMI generated by power electronic devices is usually dominated by conducted interference. The standard sinusoidal waveform on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 马强李阳田磊李伟朱长娥董宝林刘胜男李树雯
Owner TIANJIN TEAMWELL DETECTION
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