SGDB-15ADFY1驅動器
SGDB-15ADFY1驅動器
SGDB-15ADFY1驅動器
2.3 來自係統內部的幹擾
主要由係統內部元器件及電路間的相互電磁輻射產生,如邏輯電路相互輻射及其對模擬電路的影響,模擬地與邏輯地的相互影響及元器件間的相互不匹配使用等。這都屬於制造廠對係統內部進行電磁兼容設計的內容,比較復雜,作為應用部門是無法改變,可不必過多考慮,但要選擇具有較多應用實績或經過考驗的係統
3 工程實施中主要抗幹擾措施
為了保證係統在工業電磁環境中免受或減少內外電磁幹擾,從設計階段開始便採取三個方面抑制措施:抑制幹擾源;切斷或衰減電磁幹擾的傳播途徑;提高裝置和係統的抗幹擾能力。這三點就是抑制電磁幹擾的基本原則。
控制係統的抗幹擾是一個係統工程,要求制造單位設計生產出具有較強抗幹擾能力的產品,且有賴於使用部門在工程設計、安裝施工和運行維護中予以考慮,並結合具有情況進行綜合設計,才能保證係統的電磁兼容性和運行可靠性。主要考慮來自係統外部的幾種如果抑制措施。主要內容包括:對係統及外引線進行屏蔽以防空間輻射電磁幹擾;對外引線進行加裝隔離器,特別是原理動力電纜,分層布置,以防通過外引線引入傳導電磁幹擾;正確設計接地點和接地裝置,完善接地係統。另外還利用軟件手段,進一步提高係統的可靠性。
3.1 採用性能優良的電源,抑制電網引入的幹擾
在控制係統中,電源佔有極重要的地位。電網幹擾串入控制係統主要通過PLC係統的供電電源(如CPU 電源、I/O 電源等)、變送器供電電源和與PLC係統具有直接電氣連接的儀表供電電源等耦合進入的。現在,對於 PLC 係統供電的電源,一般都採用隔離性能較好電源,而對於變送器供電的電源和 PLC 係統有直接電氣連接的儀表的供電電源,並沒受到足夠的重視,雖然採取了的隔離措施,但普遍還不夠,主要是使用的隔離變壓器分布參數大,抑制幹擾能力差,經電源耦合而串入共模幹擾、差模幹擾。所以,對於變送器和共用信號儀表供電應選擇分布電容小、抑制帶(如:使用北京平和公司隔離配電器),可以減少 PLC 係統的幹擾。此外,位保證電網饋點不中斷,可採用在線式不間斷供電電源(UPS)供電,提高供電的可靠性。並且UPS 還具有較強的幹擾隔離性能,是一種PLC控制係統的理想電源。
3.2 電纜敷設
為了減少動力電纜輻射電磁幹擾,尤其是變頻裝置饋電電纜。筆者在某工程中,採用了銅帶鎧裝屏蔽電力電纜,從而降低了動力線生產的電磁幹擾,該工程投產後取得了滿意的效果。不同類型的信號及控制電纜分別由不同電纜傳輸,信號電纜應按傳輸信號種類與動力電纜分層敖設,嚴禁用同一電纜的不同導線同時傳送動力電源和信號,避免信號線與動力電纜靠近平行敖設,以減少電磁幹擾。另外對於信號電纜及控制電纜應採用屏蔽電纜
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【主營產品】
1:Invensys Foxboro(福克斯波羅):I/A Series係統,FBM(現場輸入/輸出模塊)順序控制、梯形邏輯控制、事故追憶處理、數模轉換、輸入/輸出信號處理、數據通信及處理等。
2:Invensys Triconex: 冗餘容錯控制係統、基於三重模件冗餘(TMR)結構的現代化的容錯控制器。
3:Westinghouse(西屋): OVATION係統、WDPF係統、WEStation係統備件。
4:Rockwell Allen-Bradley: Reliance瑞恩、SLC500/1747/1746、
MicroLogix/1761/1763/1762/1766/1764、CompactLogix/1769/1768、
Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。
5:Schneider Modicon(施耐德莫迪康):Quantum 140係列處理器、控制卡、電源模塊等。
6:ABB:工業機器人備件DSQC係列、Bailey INFI 90等。
7:Siemens(西門子):Siemens MOORE, Siemens Simatic C1,Siemens數控係統等。
8:Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等係列。
9:XYCOM:I/O 、VME板和處理器等。
10:GE FANUC(GE發那科):模塊、卡件、驅動器等各類備件。
11:Yaskawa(安川):伺服控制器、伺服馬達、伺服驅動器。
12:Bosch Rexroth(博世力士樂):Indramat,I/O模塊,PLC控制器,驅動模塊等。
13:Woodward(伍德沃德):SPC閥位控制器、PEAK150數字控制器。
14:工業機器人係統備件。
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PEB2060NV4.4GSICOFI SIEMENS
ROV10H361K-S RAYCHEM
TPA6211A1DRBRG4 TEXAS INSTRUMENTS
609-2604-ER THOMAS & BETTS
IRL630A FAIRCHILD
MAX1718BEEI MAXIM
MAX232CWE-T MAXIM
MAX6667AUT-T MAXIM
43160-2103 MOLEX
STF10NK50Z ST MICROELECTRONICS SEMI
74ABT646AD PHILIPS
PCK2057DGG PHILIPS
440297-1 AMP
282828-2 AMP
X9316WSI-3 XICOR
FIN324CGFX FAIRCHILD
CD74AC04M96 HARRIS
SI3456DV-T1 VISHAY
MAX942CUA-T MAXIM
MMSD103T1 ON SEMICONDUCTOR
AD8197AASTZ-RL ANALOG DEVICES
EL1528CLZ ELANTEC
MT58LC32K32C5-10:G MICRON TECHNOLOGY,INC
878325322 MOLEX
LQH43NN222K01L MURATA
NE555D FAIRCHILD
RMC18-5111FT KAMAYA ELECTRIC CO. LTD
MC68HC908GP52CFB FREESCALE SEMICONDUCTOR
750101R560 CTS
LAT676-Q OSRAM OPTO
CRCW08058K25FKEA VISHAY
MC68HC001FN8 FREESCALE SEMICONDUCTOR
LTC1063CS LINEAR TECHNOLOGY
T405-700B-TR ST MICROELECTRONICS SEMI
74HCT4053D PHILIPS
RG515-02T1K8 VITROHM
2.32E+11 PHILIPS
CFS1/4LT52R112J KOA
MCC224-22IO1 IXYS CORPORATION
HM20100P2 FOXCONN ELECTRONICS
VCR4N SILICONIX
5000272481 MOLEX
IDT74FCT138ATP IDT
WLNFN0068936 OTHER
SK450M0010B5S-1320 YAGEO
700384647 OTHER
1N4729A FAIRCHILD
SS-6446S-A-PGFLS-BA-50 STEWART CONNECTOR SYSTEMS
4816P-002-333 BOURNS
100096-1 AMP
DE09S565MT FRAMATOME CONNECTORS
CRCW06031690F100RT1 VISHAY
SFR255%4K3 VISHAY
S891C225MA1 NICHICON
ADSP-2183BSTZ-115 ANALOG DEVICES
MIC2145BMM MICREL
2.32E+11 PHILIPS
74HC4538D NXP SEMICONDUCTORS
A6250V1PS16B+ EM MICROELECTRONICS
C0603JRNPO9BN101 YAGEO
UJA1065TW/3V3 NXP SEMICONDUCTORS
ISPPAC20-01TI LATTICE
DMP2123L-7 DIODES INC.
MC78L12ACD ON SEMICONDUCTOR
PEX8618-BA50BC PLX TECHNOLOGY
527R-03LF INTEGRATED CIRCUIT SYSTEMS
BAS40-05E6327 INFINEON
E121SD1AV2L8E C&K
PI49FCT3807HE PERICOM SEMICONDUCTOR CORP
TB62757FPGOEL TOSHIBA
RSB12JS2T2R ROHM
TPS63020DSJT TEXAS INSTRUMENTS
LM4927SD/NOPB NATIONAL SEMICONDUCTOR
15-44-3230 MOLEX
EP3C5F256C8N ALTERA
42CTQ030STRR INTERNATIONAL RECTIFIER
B39389-K3953-M100 EPCOS
ES1J OTHER
SN74AHCT1G08DBVT TEXAS INSTRUMENTS
MTSW-150-11-S-D-640 SAMTEC
WLAVA32994-02/01 OTHER
MN864502 PANASONIC
TLP4597G(F) TOSHIBA
IRF6622TRPBF INTERNATIONAL RECTIFIER
93AA86/SN MICROCHIP
QSMC-A435-ZA0M1 AVAGO TECHNOLOGIES
ROV10-471K RAYCHEM
TAJB475K025R AVX
FQH140N10 FAIRCHILD
MF1/4DLT52R2261F KOA
OPA4350UA BURR-BROWN
PCT2.225BK NEMCO
CRCW12064R70FKEA0C VISHAY
1N4148WS-7-F DIODES INC.
TPS62200DBVT TEXAS INSTRUMENTS
RG82845G(SL6PR) INTEL
CNY173SD FAIRCHILD
FQT4N25TF FAIRCHILD
ECUV1H1R5CCN MATSUSHITA ELECTRONIC
LR2512-R20FW WELWYN
DS89C21TMX/NOPB NATIONAL SEMICONDUCTOR
MAX4117ESA MAXIM
AC5520-SLGMU INTEL
AQY275AX MATSUSHITA ELECTRONIC
SAK-C164CI-LM INFINEON