廈門季旭貿(mào)易有限公司
主營產(chǎn)品: AB,ABB,F(xiàn)ANUC,Siemens,Schneider |
廈門季旭貿(mào)易有限公司
主營產(chǎn)品: AB,ABB,F(xiàn)ANUC,Siemens,Schneider |
參考價 | 面議 |
談?wù)劷涣麟姍C(jī)IMHSS03貝利模件IMHSS03
交流電機(jī)一般分為同步和異步電機(jī)
1、交流同步電機(jī):就是轉(zhuǎn)子是由永磁材料構(gòu)成,所以轉(zhuǎn)動后,隨著電機(jī)的定子旋轉(zhuǎn)磁場的變化,轉(zhuǎn)子也做響應(yīng)頻率的速度變化,而且轉(zhuǎn)子速度=定子速度,所以稱"同步"。
2、交流異步電機(jī):轉(zhuǎn)子由感應(yīng)線圈和材料構(gòu)成。轉(zhuǎn)動后,定子產(chǎn)生旋轉(zhuǎn)磁場,磁場切割定子的感應(yīng)線圈,轉(zhuǎn)子線圈產(chǎn)生感應(yīng)電流,進(jìn)而轉(zhuǎn)子產(chǎn)生感應(yīng)磁場,感應(yīng)磁場追隨定子旋轉(zhuǎn)磁場的變化,但轉(zhuǎn)子的磁場變化永遠(yuǎn)小于定子的變化,一旦等于就沒有變化的磁場切割轉(zhuǎn)子的感應(yīng)線圈,轉(zhuǎn)子線圈中也就沒有了感應(yīng)電流,轉(zhuǎn)子磁場消失,轉(zhuǎn)子失速又與定子產(chǎn)生速度差又重新獲得感應(yīng)電流...所以在交流異步電機(jī)里有個關(guān)鍵的參數(shù)是轉(zhuǎn)差率就是轉(zhuǎn)子與定子的速度差的比率。
3、對應(yīng)交流同步和異步電機(jī)變頻器就有相映的同步變頻器和異步變頻器,伺服電機(jī)也有交流同步伺服和交流異步伺服,當(dāng)然變頻器里交流異步變頻常見,伺服則交流同步伺服常見。
伺服與變頻的一個重要區(qū)別
變頻可以無編碼器,伺服則必須有編碼器,作電子換向用,交流伺服的技術(shù)本身就是借鑒并應(yīng)用了變頻的技術(shù),在直流電機(jī)的伺服控制的基礎(chǔ)上通過變頻的PWM方式模仿直流電機(jī)的控制方式來實(shí)現(xiàn)的,也就是說交流伺服電機(jī)必然有變頻的這一環(huán)節(jié):變頻就是將工頻的50、60HZ的交流電先整流成直流電,然后通過可控制門極的各類晶體管(IGBT,IGCT等)通過載波頻率和PWM調(diào)節(jié)逆變?yōu)轭l率可調(diào)的波形類似于正余弦的脈動電,由于頻率可調(diào),所以交流電機(jī)的速度就可調(diào)了(n=60f/2p,n轉(zhuǎn)速,f頻率,p極對數(shù)).IMMFP12貝利模件IMMFP12IMMFP12貝利模件IMMFP12IMMFP12貝利模件IMMFP12
Honeywell TDC 3000 Five-slot Chassis Fan Assembly (51400646-100)
51400647-100 Honeywell TDC 3000 Ten-slot Chassis Fan Assembly (51400647-100)
51400667-100 Honeywell TDC 3000 LCN Interface (51400667-100)
51400669-100 Honeywell TDC 3000 Floppy Disc Controller (51400669-100)
51400700-100 Honeywell TDC 3000 Data Hiway Interface (51400700-100)
51400712-100 Honeywell TDC 3000 Five-slot Chassis Power Supply (51400712-100)
51400712-200 Honeywell TDC 3000 Ten-slot Chassis Power Supply (51400712-200)
51400910-100 Honeywell TDC 3000 Enhanced Memory (51400910-100)
51400955-100 Honeywell TDC 3000 Process Network Interface (51400955-100)
51400972-100 Honeywell TDC 3000 Keyboard Interface (51400972-100)
51400978-100 Honeywell TDC 3000 Processor (51400978-100)
51400997-100 Honeywell TDC 3000 PLC Gateway Interface (51400997-100)
51400997-200 Honeywell TDC 3000 Enhanced PLC Gateway Interface (51400997-200)
51401052-100 Honeywell TDC 3000 SPC Card (51401052-100)
51401072-200 Honeywell TDC 3000 QMEM-2 (51401072-200)
51401072-300 Honeywell TDC 3000 Enhanced Memory (51401072-300)
51401088-100 Honeywell TDC 3000 CNI Interface (51401088-100)
51401163-100 Honeywell TDC 3000 Process Network Modem (51401163-100)
51401286-100 Honeywell TDC 3000 Interface Card (51401286-100)
51401288-100 Honeywell TDC 3000 68020 w/2 mg (51401288-100)
51401288-200 Honeywell TDC 3000 68020 w/3 mg (51401288-200)
51401291-100 Honeywell TDC 3000 Low Power LCN (51401291-100)
51401496-100 Honeywell TDC 3000 Dual Node Fan Assembly (51401496-100)
51401497-100 Honeywell TDC 3000 Dual Node Power Supply (51401497-100)
51401551-200 Honeywell TDC 3000 68020 w/2 mg (51401551-200)
51401551-300 Honeywell TDC 3000 68020 w/3 mg (51401551-300)
51401551-400 Honeywell TDC 3000 68020 w/4 mg (51401551-400)TU811V1 3BSE013231R1控制器模塊ABB
51401551-600 Honeywell TDC 3000 68020 w/6 mg (51401551-600)
51401551-800 Honeywell TDTU811V1 3BSE013231R1控制器模塊ABB
1394-SJT10-C-RL
1394-SJT10-T-RLIMHSS03貝利模件IMHSS03
1394-SJT22-A
1394-SJT22-C-RL
1394-SJT22-T
1394-SJT22-T-RL
1394-SR10
1394-SR10A
1394-SR36A
1394-SR36AF
1394-SR9ATU810V1 3BSE013230R1控制器模塊ABB
1394-SR9AF
74102-303-51
74102-328-53
74102-343-51
74102-405TU810V1 3BSE013230R1控制器模塊ABB
74102-405-53
74102-405-54
74102-588-51