System and method for testing low-frequency radiation immunity of power line based on crosstalk injection

Abstract

The invention discloses a system and a method for testing low-frequency radiation immunity of a power line based on crosstalk injection, belongs to the field of electromagnetic compatibility testing methods of electrical and electronic equipment, and aims to solve the problems that a radiation immunity testing method based on a darkroom irradiation method is complex, time-consuming and high in cost, and the radiation efficiency of a low-frequency-band antenna below 1GHz is low. According to the invention, the number of radio frequency interference sources required by a crosstalk injection method is reduced from two to one through a line impedance stabilization network, and the problem of complexity of dual-source cooperative regulation and control is avoided. The radiation immunity test system provided by the invention adopts a near-field crosstalk method, the coupling efficiency is high, expensive equipment such as a microwave anechoic chamber and a broadband radiation antenna is omitted, the time cost and the equipment cost required by the radiation immunity test are saved, and the radiation immunity test system has a better application prospect in the field of electromagnetic compatibility test methods of electrical and electronic equipment.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility (EMC) testing methods of electrical and electronic equipment, and relates to a power line low-frequency radiation immunity testing system and method based on crosstalk injection. Background technique [0002] Radiation immunity is a basic electromagnetic compatibility (EMC) test item to test the resistance of electrical and electronic equipment to a certain intensity of radiated electromagnetic interference. The anechoic chamber irradiation method is the most widely used radiation immunity test method. Its principle is that in the anechoic chamber space, a broadband radiation antenna is used to generate a certain intensity of electromagnetic radiation interference, and the equipment under test, which is constantly rotating on the turntable, is excited one by one. (EUT), by observing whether the EUT has interference, restart, downtime and other effects, the immunity of the equipment is ...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a power line low-frequency radiation immunity test system and method based on crosstalk injection, aiming at solving the radiation immunity based on darkroom irradiation method in the prior art The test method is complex, time-consuming and costly, and due to the defective technical problem of low-frequency antenna radiation efficiency below 1GHz

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