It is composed of four parts : dc ( direct current ) power supply , resonance charging and polarity reverse unit , electric relay control unit and computer control unit 它主要由四部分組成:三相整流直流電源,諧振充電及電壓反向單元,繼電器控制單元,計算機控制單元。
Computer control unit produces the trigger pulses for the fast switching thyristors . fast switching thyristors are connected in parallels in order to meet the capacitance requirement of the circuit . trigger pulses produced by computer are amplified and isolated by three pulse transformers 設計三級脈沖變壓器來隔離和放大計算機產生的觸發(fā)脈沖,得到強觸發(fā)信號滿足了多個快速晶閘管并聯(lián)觸發(fā)的功率要求以及系統(tǒng)的抗反擊電壓的要求。
This paper mainly discusses the application and design of fcs ( fieldbus control system ) in the central station of the heating system and the software design and implementation of the central station ? monitoring control system of the heating system , which is composed of supervisory pc ~ single chip computer control unit and measuring unit 本文主要敘述了fcs型熱網(wǎng)首站微機監(jiān)控系統(tǒng)的設計及其監(jiān)控主機軟件的實現(xiàn)。該系統(tǒng)是一個工業(yè)現(xiàn)場的監(jiān)控系統(tǒng),適用于集中供熱網(wǎng)的換熱首站,實現(xiàn)對熱網(wǎng)首站的實時監(jiān)控。系統(tǒng)采用分布式設計,由監(jiān)控主機、現(xiàn)場測控單元、現(xiàn)場采集單元組成。