Feedback unit manufacturers remind you that with the rapid development of China's economy, society, and science and technology, a large number of frequency converters are now used in various industries. Due to the wide range of applications of frequency converters and the vast territory of China, there are a large number of frequency converters working in extremely humid environments, such as those installed in humid and rainy coastal and southern regions, as well as wind turbine frequency converters installed near rivers, lakes, seas, and humid mountains.
Although the frequency converter can operate normally in these places, condensation may occur once there is a significant change in the working environment temperature due to the influence of air humidity. This will cause a certain amount of liquid water to be generated in the power components, circuit boards, and other parts of the frequency converter. After mixing with the accumulated dust inside, it will affect its electrical insulation and, in severe cases, create pathways, leading to malfunctions and affecting normal operation.
The phenomenon of condensation can seriously affect and threaten the normal and stable operation of the frequency converter. If the frequency converter operates in a humid environment, especially in the rainy southern region in summer, correct measures must be taken to prevent and eliminate condensation. At present, there are only two commonly used methods for preventing condensation, namely temperature control and humidity control. The former aims to reduce relative temperature, while the latter aims to reduce relative humidity.
1、 Temperature control method
Preventing the formation of condensation can be achieved by disrupting the conditions for condensation formation. Due to the relatively enclosed interior of the inverter cabinet, if the cabinet temperature can always be kept above the dew point temperature, condensation will not occur. At present, there are mainly two temperature control schemes:
1. Install a filter at the ventilation opening to prevent a large amount of dust from entering the interior of the frequency converter, ensuring IP protection level; Set a heater for the frequency converter to start heating once the humidity is too high, and increase ventilation when the temperature rises; This ensures that the relative humidity of the air inside and outside the frequency converter remains consistent, and the temperature remains within the normal range.
2. Ƙarfin sanyaya na ciki na mai sauya mitar yana da ingantacciyar sarrafawa, yana tabbatar da cewa zafin jiki a cikin majalisar ya kasance a cikin wani yanki. Lokacin da zafi ya wuce bakin kofa, ƙarfin watsar da zafi na mai sauya mitar yana raguwa, kuma ana amfani da wutar lantarki da aka samar da mai sauya mitar don ƙara yawan zafin jiki a cikin ma'ajin mai jujjuya mitar, don haka yana hana ƙazantawa daga faruwa; Lokacin da zafin jiki ya wuce bakin kofa, ana ƙara ƙarfin watsar da zafi don hana yawan zafin jiki daga yin tasiri na yau da kullun na mai sauya mitar.
2. Hanyar sarrafa danshi
Ta hanyar rage yawan tururi na ruwa da kuma rage yawan zafi na iska yadda ya kamata, ana iya hana faruwar tari, musamman gami da tsare-tsare guda uku masu zuwa:
1. Hanyar rage humidification na yanayin zafi: Shigar da ma'aunin zafi a cikin na'ura mai canzawa wanda ke da amfani ga magudanar ruwa, ta yadda zazzagewa kawai ke samuwa a kan ma'aunin zafi kuma baya samuwa a wasu sassa na mitar. Ruwan da aka ƙera akan magudanar zafi yana fitar da shi a waje ta hanyar fita don tabbatar da cewa majalisar ministoci koyaushe tana kula da yanayin bushewa.