IC200MDL650擴展模塊
主電路是給異步電動機提供調壓調頻電源的電力變換部分,變頻器的主電路大體上可分為兩類:電壓型是將電壓源的直流變換為交流的變頻器,直流回路的濾波是電容。電流型是將電流源的直流變換為交流的變頻器,其直流回路濾波是電感。它由三部分構成,將工頻電源變換為直流功率的“整流器”,吸收在變流器和逆變器產生的電壓脈動的“平波回路”,以及將直流功率變換為交流功率的“逆變器“。
IC200MDL650擴展模塊
隨著科學技術飛速發展,對電源可靠性、容量/體積比要求越來越高,模塊電源越來越顯示其性,它工作頻率高、體積小、可靠性高,便於安裝和組合擴容,所以越來越被廣泛採用。國內雖有相應模塊生產,但因生產工藝未能趕上國際水平,故障率較高。
DC/DC模塊電源雖然成本較高,但從產品的漫長的應用周期的整體成本來看,特別是因係統故障而導致的高昂的維修成本及商譽損失來看,選用該電源模塊還是合算的,在此還值得一提的是羅氏變換器電路,它的突出優點是電路結構簡單,效率高和輸出電壓、電流的紋波值接近於零。
IC200MDL650擴展模塊
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