EMC Design Home Appliances
Abstract: This paper discusses the electromagnetic disturbance to the electromagnetic appliances environmental impact and the importance of the implementation of electromagnetic compatibility, electromagnetic compatibility and then discusses the design of the contents of the appliances and methods, and examples of how to control household appliances generate electromagnetic harassment.
Keywords: home appliances, electromagnetic interference, electromagnetic compatibility
Abstract: TheinfluenceoftheelectromagneticdisturbanceofhomeapplianceontheelectromagneticenvironmentandtheimportanceofcarryingoutEMCwrerdiscussed, thentheEMCclesignmethodswereintroduedandillustratedwithexamples.
Keywords: Homeappliance; Electromagneticdisturbance; EMC.
Present, ever-changing electronic information technology, digital wave of rough, but the arrival of the Internet age it will bring a new home appliance industry, the broad market. The concept of home appliances in the 21st century will be expanded and extended, so we are the future of home appliance manufacturing industry in China full of confidence. However, all are built on the basis of an important, namely, the electromagnetic compatibility design of household appliances.
1, household appliances electromagnetic disturbance to the electromagnetic environment
Recent years, with the development of science and technology, home appliances are rapidly to energy conservation, automation, intelligent, convenient, comfortable and the trend of development. Thus, as more and more varieties of household appliances, expanded its production scale; the same time, imports are flooding the market. On the other hand, with the microelectronic control technology, electronic home appliances in large numbers. The resulting electromagnetic disturbances in other household appliances or electronic equipment on the normal use and reliability, impact and damage, but also on people's physical health has a direct impact. At present, the electromagnetic environment protection, to prevent electromagnetic pollution has caused the world and the general concern of the international organizations concerned. In particular, the EC Council Directive "Member States relating to electromagnetic compatibility of the law on the consensus reached" (89/336/EEC) on January 1, 1996 entered into the implementation phase, the electronic, electrical products, EMC indicators become eligible or not the EC market access or a necessary condition for market circulation. As China's EMC certification system is established and perfected, electronic products, including household appliances will continue to improve the electromagnetic compatibility, and then gradually reduce electromagnetic pollution, protect the vital interests of users.
Home electronics on the electromagnetic environment in accordance with the impact of reason, can be divided into the following types of household appliances:
(1) by the motors with a commutator during operation, the brush and commutator contact with the formation of sparks caused by electromagnetic disturbance of household appliances, such as vacuum cleaner, hair dryer, electric sewing machines, food mixers, electric razors, etc.; electromagnetic disturbance is likely to cause any other appliances or electronic equipment performance degradation or damage to human health effects of electromagnetic phenomena;
(2) Because the switching frequency of electromagnetic disturbance caused by household appliances such as electric rice cookers, electric irons, electric ovens, refrigerators, washing machines, etc.;
(3) startup may cause the indicators down low voltage distribution network, leading to other household appliances or electronic equipment, household appliances can not function properly, such as the air conditioner starts the required voltage high current power will temporarily decline, motor or inductive converter such as suppression of inductive load startup will lead to decreased supply power factor, frequency-type air conditioner will produce power electronic devices such as power harmonics;
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