描述
1756-L73XT
交流變頻調(diào)速之所以比直流調(diào)速廣泛運(yùn)用是因?yàn)榻涣麟姍C(jī)，不是變頻調(diào)速原理具有優(yōu)越性，變頻調(diào)速只能應(yīng)用于調(diào)速，而對力矩是無法做到精確控制的，原因很簡單，直流調(diào)速的電樞和勵磁不是耦合的，是分開的，這樣對電樞電流和勵磁電流能夠做到精確控制。而交流調(diào)速，電樞電流和勵磁電流是耦合的，是無法做到精確控制的，盡管目前的變頻調(diào)速具有矢量控制，也就是運(yùn)用現(xiàn)代控制理論，通過矢量轉(zhuǎn)換，將交流電機(jī)中耦合的電樞電流和勵磁電流解開，從而對其進(jìn)行控制，也就是仿真直流調(diào)速的原理。但是要做到直流調(diào)速的控制特性目前是很困難的。因此在軋機(jī)、造紙等對力矩要求很高行業(yè)，直流調(diào)速還是具有廣泛性。而僅對速度控制，目前變頻調(diào)速是可以逼真直流調(diào)速的特性，因?yàn)榻涣麟姍C(jī)的優(yōu)越性是直流電機(jī)無法做到的。
直流電機(jī)的電刷和體積的原因，限制了它的應(yīng)用范圍，變頻調(diào)速可以說是由風(fēng)機(jī)和水泵發(fā)展而來的，是由于風(fēng)機(jī)和水泵節(jié)能的需要，變頻調(diào)速是最佳選擇，不過我個人認(rèn)為就目前電價和變頻器的自身的價格相比，這種節(jié)能是毫無意義的，因?yàn)橐炎冾l器的投資收回，最少需要5-6年，在這5-6年的時間里，工況還不知道要發(fā)生什么變化。因此，變頻器最好應(yīng)用在需要調(diào)速，而對啟動性能及力矩調(diào)節(jié)要求不是很苛刻的場合，而這種場合比比皆是，這才是變頻調(diào)速普遍應(yīng)用的原因。因此可以說如果用直流調(diào)速控制器去控制交流電機(jī)那才是最好的，真能做到這一點(diǎn)，目前還很困難。
產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌：ABB???,AB??,GE,FOXBORO,本特利，英維思，伍德沃德，西屋，瑞恩，施耐德，西門子，摩托羅拉，安川。力士樂。ACSO，橫河等進(jìn)口品牌。 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實(shí)力庫存商家
Agilestar – 02312189-AS – For Huawei – New in Box
Agilestar – AFCT-5710APZ-AS – For Agilent-Avago – New i
Agilestar – FTLF1321P1BTL-A?S – For Finisar – New in Box
Agilestar – SPBD-155E4J1RT-?AS – For Delta – New in Box
Agilestar – SPBD-155F4J1RT-?AS – For Delta – New in Box
Agilestar – AS-OC12-IR1 – For Agilestar – New in Box
Agilestar – AS-OC12-LR1 – For Agilestar – New in Box
Agilestar – 10053 – For Extreme Networks – New in Box
Agilestar – 2311204 – For use in Huawei – New in Box
Agilestar – 3CSFP97 – For use in 3Com – New in Box
Agilestar – FTLF8528P2BNV-A?S – For Finisar – New in Box
Agilestar – AFCT-5764APZ – For Aglilent Avago – NIB
Agilestar – OC-5000-1111 – For Alcatel-Lucent – NIB
Agilestar – 808-38302-AS – For IMC Networks – New in Bo
Agilestar – AFCT-5760TPZ- For Aglilent Avago – NIB
Agilestar – 10063 – For Extreme Networks – New in Box
Agilestar – AFCT-5710PZ-AS – For Agilent-Avago – New in
Agilestar – LCP-4250B4QDRT-?AS – For Delta – New in Box
Agilestar – OC12-SFP-SR – For Alcatel-Lucent – NIB
Agilestar – DEM-314GT – For use in D-Link – New in Box
Agilestar – TN-GLC-T – For Transition Networks – NIB
Agilestar – TN-SFP-LX3 – For Transition Networks – NIB
Agilestar – 3CGBIC97 – For use in 3Com – 1000Base-LX
Agilestar – 3CSFP85 – For use in 3Com – 100BASE-BX10-D
Agilestar – 3CSFP9-81 – For use in 3Com – 100BASE-FX
Agilestar – 3CSFP9-82 – For use in 3Com – 100BASE-LX10
Agilestar – GP-SFP2-1F – For Force 10 Networks – NIB
Agilestar – GP-SFP2-1Z – For Force 10 Networks – NIB
Agilestar – FTL-1319-3D-2.5?-AS – For Finisar – New in B
Agilestar – FTL-8519-3D-2.5?-AS – For Finisar – New in B
Agilestar – HFCT-5701L-AS – For Agilent-Avago – New in
Agilestar – HFCT-5701LP-AS – For Agilent-Avago – New in
Agilestar – SF2G-LX3-5-AS – For FibroLAN – New in Box
Agilestar – F5UPGSFPLXR – For use in F5 Networks – NIB
Agilestar – 808-38223-AS – For IMC Networks – New in Bo
Agilestar – AA1419048-E6 – For Nortel – New in Box
Agilestar – TN-GLC-T – For Transition Networks – NIB
Agilestar – AT-G8BD-13-AS – For Allied Telesyn – NIB
Agilestar – JD498A – For HP – New in Box
Agilestar – 1184561P3 – For use in Adtran – New in Box
Agilestar – BTI-MGBIC-G47-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-G49-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-G51-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-G53-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-G55-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-G57-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-G59-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-G61-L?C-AS – For Telco – New in Bo
Agilestar – BTI-MGBIC-GEX-L?C-AS – For Telco – New in Bo
Agilestar – HFBR-5720SL-AS – For Agilent-Avago – New in
Agilestar – HFBR-57R5P-AS – For Agilent-Avago – New in
Agilestar – TEG-GBS40 – For use in TRENDnet New in Box
Agilestar – FCL-8521-3-AS – For Finisar – New in Box
Agilestar – SF155-SMRF13-AS – For FibroLAN – New in Box
Agilestar – SF155-SMRF15-AS – For FibroLAN – New in Box
Agilestar – SF2G-LX3-3-AS – For FibroLAN – New in Box
Agilestar – 3CSFP86 – For use in 3Com – New in Box
Agilestar – 808-38322-AS – For IMC Networks – New in Bo
專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
PLC模塊，可編程控制器，CPU模塊，IO模塊，AI模塊，通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅
15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實(shí)力庫存商家
18150087953 點(diǎn)擊撥打電話聯(lián)系我們