變頻器控制方式特點(diǎn):
其特點(diǎn)是控制電路結(jié)構(gòu)簡(jiǎn)單、成本較低,機(jī)械特性硬度也較好,能夠滿足一般傳動(dòng)的平滑調(diào)速要求,已在產(chǎn)業(yè)的各個(gè)域得到廣泛應(yīng)用。但是,這種控制方式在低頻時(shí),由于輸出電壓較低,轉(zhuǎn)矩受定子電阻壓降的影響比較顯著,使輸出大轉(zhuǎn)矩減小。另外,其機(jī)械特性終究沒(méi)有直流電動(dòng)機(jī)硬,動(dòng)態(tài)轉(zhuǎn)矩能力和靜態(tài)調(diào)速性能都還不盡如人意,且系統(tǒng)性能不高、控制曲線會(huì)隨負(fù)載的變化而變化,轉(zhuǎn)矩響應(yīng)慢、電機(jī)轉(zhuǎn)矩利用率不高,低速時(shí)因定子電阻和逆變器死區(qū)效應(yīng)的存在而性能下降,穩(wěn)定性變差等。因此人們又研究出矢量控制變頻調(diào)速。
S7-1200通信和程序的特點(diǎn):
S7-1200是西門(mén)子的新一代的控制器,在串口通信方面在硬件與軟件方面都與S7-200不同:通訊方面:作為200的升產(chǎn)品,1200不支持DP等應(yīng)用比較廣泛的通訊協(xié)議,但保留了強(qiáng)大的自由口通訊功能;程序方面:引入塊概念,更接近于300,編程方便,尤其是通訊方面的編程(自由口、MODBUS等,一個(gè)塊可以控制多個(gè)驅(qū)動(dòng)器,不同電機(jī)的數(shù)據(jù)存儲(chǔ)在不同的數(shù)據(jù)庫(kù)中;硬件方面:S7-1200現(xiàn)有的幾款PLC都可以擴(kuò)展3個(gè)串口通信模板(即可以全部是RS232接口,也可以全部是RS485接口,也可以是兩種接口的組合),而S7-200這不可以進(jìn)行擴(kuò)展,只能用本體上的RS485口,在這一點(diǎn)上功能強(qiáng)了。軟件方面:S7-1200,在編程上與S7-300的編程方法類(lèi)似,組態(tài)完硬件接口,直接調(diào)用功能塊就可以,非常簡(jiǎn)單,不像S7-200需要對(duì)SM進(jìn)行操作。S7-1200與S7-300在串口通信比較起來(lái)基本上一樣,但在作Modbus的通信時(shí)不需要額外的Dongle來(lái)支持。
Allen Bradley 1336S-CWF30-AA-DE4 1336 Plus Motor Drive 1336SCWF30AADE4
Allen Bradley 1336S-B020-AE-DE4 1336 Plus 25/27 kVA Motor Drive 1336SB020AEDE4
Allen Bradley 1336S-B010-AN-EN4-GM1-HA2-L6E 1336 Plus 1336SB010ANEN4GM1HA2L6E
Allen Bradley 1336F-BRF150-AN-EN-HAS2-L6 380/480 VAC Drive 19.1 kVA
Allen Bradley 1336F-BRF100-AE-EN 380/480 VAC Drive 12.8/17.5 kVA 1336FBRF100AEEN
Allen Bradley 1336F-A010-AN-EN-HAS2-L4E 14 kVA VFD Drive 1336FA010ANENHAS2L4E
Allen Bradley 1336E-AQF20-AA-EN 1336 Impact Force VFD 1336-L8E 1336EAQF20AAEN
Allen Bradley 1336-B025-EAF-L1 3 Phase 27/29/33 kVA 41 Amp Drive 1336B025EAFL1
Allen Bradley 1336-B015-E0E-L3 16.5/18/20 kVA 3 Phase AC Drive 1336B015E0EL3
Allen Bradley 1336-B010-EOD-L3 11.2/12.2/13.5 kVA 3 Phase AC Drive 1336B010EODL3
Allen Bradley 1336-B010-EOD 11.2/12.2/13.5 kVA 3 Phase AC Drive 1336B010EOD
Allen Bradley 1336-B010-EJD-L3 Constant Torque AC Drive 17 Amp 1336B010EJDL3
Allen Bradley 1336-B003-EOD 3.9/4.3/4.8 kVA 3 Phase AC Drive 1336B003EOD
Allen Bradley 1333-YAB A4-1.5KW 1.5 kW Adjustable Frequency AC Motor Drive
Allen Bradley 1332-AAB VFD AC Drive 460 VAC 1.7 kVA 60 Hz 1332AAB
Allen Bradley 1321-3R100-B 162756 Line Filter Reactor .3 mH 100 Amp RL-10002
Allen Bradley 1305-BA04A-HA2 VFD AC Drive 380-460 VAC 1.5 kW 2 HP 1305BA04A
Allen Bradley 1305-BA03A-HA1 VFD AC Drive 380-460 VAC .75 kW 1 HP 1305BA03AHA1
Allen Bradley 112-C12FBA4F-6P 7.5 HP Starter Panel w/ Disconnect 112C12FBA4F6P
Allen Bradley 109-C09NZJJOV 100-C09Z*10 Starter 24 VDC Coil 592-JOV16
Allen Bradley 109-C09NDJOV 100-C09*10 Starter 110/120 VAC Coil 592-JOV16
Allen Bradley 109-A09BB3-C10 Motor Starter Start Stop Enclosure 480 V 3 Pole 9 A
Allen Bradley 104-C23DJ22 Reversing Starter 100-C23D 104C23DJ22 24 VDC Coil
Allen Bradley 104-C12J22 Reversing Motor Starter 200-240 VAC Coil 104C12J22
Allen Bradley 104-C12D22 100-C12*10 110/120 VAC Coil Reversing Starter 100-C12
Allen Bradley 100S-C23ZJ304C Safety Contactor 24 VDC Coil 100S-C23ZJ304
Allen Bradley 100S-C23J14C Contactor Starter 100S-C23J 100SC37J 100SC23J14C
Allen Bradley 100-C23EJ01 Starter 24 VDC Coil 100-C23E*01
Allen Bradley 100-C09DJ10 24 VDC Starter 100-C09D*10 100C09DJ10 100C09D10
Allen Bradley 100-B110NZ*3 Starter 100-B110NZ 100-B110 110 Amp 24 VDC Coil
Allen Bradley 1000-NX163 Size 1 Reversing Motor Starter 1000NX163 115-120 VAC
Albertronics CAN11ISM2J-1 Rectifier Stack Module CAN11ISM2J1
Albertronics CAN11ISM2J-1 304-0081 Rectifier Stack Module CAN11ISM2J1
Albertronics 304-0068 CAN11ISM2JX SCR Welding Contactor 3040068
Aladco 622501 Dual Check Pneumatic Valve
AISIN 85200 Transmission
Airmatic / Beckett-Harcum 341604 1 110/120 VAC Valve 3416041
Airgas Y11-LC241F540 Liquid Cylinder Regulator 1 Stage Brass Y11LC241F540
Aimco TW-15 Tool Balancer 9-15 Kilograms 1.3m STR TW15
AIHARA Electric Center 4120C51 Transformer 1210 VA 1.21 KVA 100/30/23/45 V Sec
AIDC 1260-01 Circuit Board AIDC126001
AIDA LA-5AN Circuit Board PT-0202
AGM TA 4018-2 Strain Gage Transmitter 0/30 MVDC Input 4/20 MADC TA40182 TA4018-2
Agastat 7022BD Timing Timer Relay 240 VAC 5-50 Seconds
AGA Specialty Gas 2 Bank Alarm Controller HY-256
AGA HPLC501-125-4F-4F Gas Regulator Assembly 0-4000 PSI HPLC5011254F4F
AEG SP177 Starter Contactor 150 HP @ 460 VAC 20/24 VAC Coil
AEG Modicon Gould AS-J378-000 Rev B Modem ASJ378000
AEG Modicon AS-BZAE-201 ZAE 201 High Speed Counter 1x50/500 khz ASBZAE201 ZAE201
AEG Modicon AS-B885-100 Assy Motion Module ASB885100
AEG MCBS 162 Adjustable Circuit Breaker 85-125 Amp 500 V 160 A D/500
AEG MCBS 162 Adjustable Circuit Breaker 120-160 Amp 500 V 160 A D/500
AEG MCBS 103 Adjustable Circuit Breaker 35-50 Amp 100 A D/500 C/660