变频器选型及保养注意事项（Frequency converter type selection and maintenance notice）.doc

变频器选型及保养注意事项（Frequency converter type selection and maintenance notice） With the general inverter market increasingly prosperous, not including OEM imported inverter, China general inverter annual consumption of more than 2 billion 500 million yuan, the inverter and the auxiliary equipment installation, commissioning, maintenance and maintenance workload increased, resulting in significant direct and indirect losses to the user. In this paper, the reasons for the above problems, according to the actual situation of a large number of users, from the application environment, electromagnetic interference and anti interference, power quality, electrical insulation and other aspects of the analysis, put forward some suggestions for improvement. 2 work environment problems In the actual application of inverter, due to a small number of domestic customers except for the special computer room, mostly in order to reduce costs, the inverter is installed directly in the industrial field. Work site is generally large dust, high temperature, there are humidity problems in the south. For wire and cable industry, as well as metal dust, in the ceramic, printing and dyeing industries, there are corrosive gases and dust, in coal mines and other occasions, as well as explosion-proof requirements, and so on. Therefore, we must make corresponding countermeasures according to the situation at the scene. 2.1 basic requirements for installation design of frequency converter (1) the frequency converter should be installed inside the control cabinet. (2) the frequency converter is best installed in the middle of the control cabinet; the frequency converter should be installed vertically; the upper part and the lower part must be installed to avoid the big components that can block the exhaust or air intake. (3) the minimum distance between the upper and lower edges of the inverter, the top and bottom of the control cabinet, or the partition board, or the large components to be installed shal