Research Of Testing Technology On EMC For Household Appliances

With the rapid development of science and technology, more and more electrical and electronic equipments are widely used, and the electromagnetic disturbance is also more and more serious. Therefore strengthen EMC testing, limit its electromagnetic interference, and ensure the normal operation of electric equipment has attracted people's attention.Electromagnetic Compatibility is an applied technology which based on electromagnetism and used to study, under the conditions of limited space, limited time and limited frequency resources the compatibility of electrical and electronic devices and systems within the common electromagnetic environment without a degradation of performance. The study of EMC is very extensive and the problem of EMC is very complex.In people's daily life, household appliances are most common, so that the electromagnetic compatibility of house appliances directly affect people's lives, and the electromagnetic compatibility of home appliances also become a growing research subject concerning to people's attention.This thesis is divided into five parts. First of all, the paper introduces the development status and significance of electromagnetic compatibility, and introduces the electromagnetic compatibility of house appliances simply.Secondly, the paper introduces the basic knowledge, standards and organizations at home and abroad of electromagnetic compatibility. What's more, the EMC standards are introduced specifically.Thirdly, the uncertainty of electromagnetic compatibility launched is researched. Choosing one laboratory test system, evaluate the measurement uncertainty of power terminal conducted emission .Next, choose two conventional electromagnetic compatibility test projects: harmonic current emission and conduction emission for research,analyzed the hazards of launch exceeding, produced causes and related suppression methods. With some launch excess of one home appliances for example, carry on the test and reorganize. And the corrective results can satisfy the standard.Finally, Finally, the thesis summarizes the entire work and the future prospect of the relevant research work.