CI867
開(kāi)關(guān)電源“電壓型”與“電流型”控制的區(qū)別是什么?網(wǎng)上總有網(wǎng)友對(duì)開(kāi)關(guān)電源電壓型控制與電流型控制的提問(wèn),回答的方式也各式各樣,為了澄清相關(guān)概念,這里發(fā)表一下對(duì)這兩個(gè)概念的理解,希望對(duì)同行有所裨益。
電壓型控制與電流型控制是指對(duì)反饋信號(hào)的不同取樣方法,電壓型控制以電源的輸出電壓為反饋信號(hào),該反饋信號(hào)與給定值的偏差經(jīng)比較器放大后與鋸齒波比較產(chǎn)生控制脈沖。而電流型控制是以高頻變壓器原邊輸出電流為采樣反饋信號(hào)組成電流閉環(huán),以電壓反饋信號(hào)組成電壓外環(huán),電壓外環(huán)的輸出偏差作為電流內(nèi)環(huán)的給定,與電流反饋信號(hào)比較產(chǎn)生控制脈沖
電壓型控制將輸出電壓與VR參考電壓Vref的偏差信號(hào)e經(jīng)PI型誤差放大器處理后與振蕩器產(chǎn)生的鋸齒波進(jìn)行比較,產(chǎn)生PWM控制脈沖
電流型控制有兩個(gè)閉環(huán)通道,電壓與VR參考電壓Vref的偏差信號(hào)e經(jīng)PI型誤差放大器得以電壓Ve,該電壓與開(kāi)關(guān)管漏極輸出電流進(jìn)行比較,產(chǎn)生PWM控制脈沖
Siemens MVB -Compact, I/O EXT
Indramat Controller, 1.2.50-300W1 , A.C. Servo
Schenck Multicont , FNT0050
Siemens Sinumerik 6FX1120-5BA01 - 6FX 1120-5BA01
Siemens Sinumerik 6FX1111-4AB00 - 6FX 1111-4AB00
SIEMENS Simatic S5 , 6ES5254-4UB21 - 6ES5 254-4UB21
Steafa Control System, NRUG, swiss made
Siemens Sinumerik 6FX1113-8AA0,6FC388-3DR
AEG Thyrotakt,Typ:DMTL380-100
Siemens Sinumerik 6FX1121-3BA01, 6FX1863-0BX01-4C
Phoenix Contact InterbusS,Analog IN/OUT,anschauen,3STK
Gildemeister, 0.861.295-72.0 164 AES055
Yaskawa VS mini J7, CIMR-J7AC44PO, 4 kW, + FS5871
Siemens 6FX1114-6AC01,6FX 1114-6AC11
Siemens bbbeperm M 6DS1403-8BA
AEG KOSKO2,Für Logidyn-D,590027790
AEG Logidyn GA-UR12,Haspelregler
Siemens Sinumerik 6FX1192-4AB00 , 6FX 1192-4AB00
Siemens Simatic S5, 6ES5988-3LA11
Siemens Simovert P 6SE 4715, G.NR. 52-1477-3
Siemens MVB Repeater, 9AB4110-1AA12, 2x24-110V DC, 50mA
Siemens Simatic S5, 6ES5 942-7UA13,E:3,CPU,TOP
ABB, drives,DI 626,61061240
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