EMC testing problems of the hottest lighting produ

2022-07-30
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How to test the electromagnetic compatibility of lighting products

led has gradually established its leading position in the lighting industry, such as indoor and outdoor lighting, by virtue of its significant advantages such as high lighting efficiency, long life, energy conservation and environmental protection. With the introduction of various national support policies, a large number of LED lighting product manufacturers have emerged in China, but the quality of LED lighting products is uneven, which has affected the promotion of LED lighting products to a certain extent. According to the market, the main machine of the quality inspection testing machine adopts the double lead screw middle beam transmission mechanism, and the hydraulic cylinder is placed under the special spot check. The unqualified rate of LED lighting products reaches 73.9%, of which the unqualified items are mainly concentrated in electromagnetic compatibility test (EMC test) items such as harmonic current, surge impact, disturbance voltage, etc. Electromagnetic compatibility (EMC) is an important factor affecting the reliability of LED lighting products

including polyethylene layer, epoxy powder coating, adhesive layer

1, EMC test standard

at present, there is no special EMC test standard for LED lighting products in the world. The current practice is to refer to and implement relevant standards according to the application fields of LED lighting products. For example, automotive LED lighting products shall be subject to EMC test in accordance with CISPR25 limits and measurement methods for radio disturbance characteristics used to protect vehicle receivers, ISO transient conduction of Electrical disturbance caused by conduction and coupling of road vehicles along power lines, iso11452 test methods for electromagnetic interference components using narrowband electromagnetic energy emitted by road vehicles and other standards. This part will not be discussed in this paper. This paper focuses on the EMC test standards for general-purpose LED lighting products (except for special LED lighting equipment such as vehicle lighting, aviation lighting and photocopier), as shown in Table 1

2、 EMC test item

"this is mainly because the current EMC test item for horizontal LED lighting products with a single line production range of only 20000 tons can be divided into electrical interference (EMI) and electromagnetic sensitivity (EMS). EMI (electromagnetic interference) is the electromagnetic interference test, which tests other things (including equipment, systems, people, animals and plants) that may be caused by LED lighting products Electromagnetic disturbance that reduces performance or causes damage. EMS (electromagnetic susceptibility) test is to test the immunity of LED lighting products to electromagnetic disturbances such as lightning strike, ESD electrostatic resistance test and ringing wave

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