1771-IM
1771-IM
全新原裝進(jìn)口PLC可編程控制器
專業(yè)銷售各系列品牌控制器、伺服驅(qū)動、輸入/輸出模塊、電源模塊 (合作)
━━━━━━━━━━━━━全系列產(chǎn)品(A full range of products)
加工定制：否 工作電壓：220(V)
產(chǎn)品描述：現(xiàn)貨/訂貨 貨期短 產(chǎn)品圖片 產(chǎn)品價(jià)格 僅供參考
公司名稱：廈門航拓電氣有限公司
Xia Men Hangtuo Electric Co., Ltd.
公司簡稱：航拓電氣
銷售地區(qū)：全國
公司經(jīng)營品牌：Allen-Bradley
abb、Siemens、Fanuc _-_-- plc可編程控制器
Schneider、Westinghouse、Ge _-__- dcs集散式控制系統(tǒng)
公司聯(lián)絡(luò)人：小吳(銷售工程師)
Tel：0592-5072236
Fax：0592-5072083
Phone：18965131356
在線QQ：1665532815
在雷達(dá)導(dǎo)航設(shè)備中，其發(fā)射部分一般都需要一高電壓、窄脈沖、不同重復(fù)頻率的強(qiáng)功率脈沖源。這種強(qiáng)功率脈沖源一般通過一個高壓電源將市電升為幾千伏至幾十千伏直流高壓，然后由一個調(diào)制器將直流高壓調(diào)制為所需脈寬及頻率的脈沖源以供發(fā)射管使用。
脈沖源主要由高壓電源及調(diào)制器部分組成，高壓電源采用開關(guān)穩(wěn)壓電源，調(diào)制器采用半導(dǎo)體器件的固態(tài)調(diào)制器。
使用方給出的觸發(fā)脈沖是TTL電平的信號，應(yīng)在輸入隔離變壓器前增加接口電路，此接口電路一是為了預(yù)放大TTL脈沖信號，二是為了與隔離變壓器匹配。為了達(dá)到隔離的目的，使用方可提供此接口電路的電源，制造方只需提出電源需求并在電路中設(shè)計(jì)相應(yīng)的變換、濾波電路即可。
觸發(fā)脈沖經(jīng)過脈沖變壓器隔離后經(jīng)過預(yù)調(diào)器脈沖整形，功率放大后去觸發(fā)調(diào)制板和截尾板工作。由預(yù)調(diào)器產(chǎn)生的激勵脈沖經(jīng)過變壓器隔離去驅(qū)動調(diào)制板的每一只場效應(yīng)管，此時調(diào)制板導(dǎo)通高壓電源送到微波三極管的陽極，微波三極管的陰極電子開始發(fā)射，微波三極管將送入輸入端的小功率高頻信號放大成大功率的高頻信號。當(dāng)脈沖結(jié)束時，由預(yù)調(diào)器產(chǎn)生的截尾脈沖去觸發(fā)截尾板，截尾板導(dǎo)通后將微波三極管的分布電容釋放，所以可以得到很好的脈沖后沿。
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