CSB01-1C-CO-ENS-NNN-NN-S-NN-FW
CSB01-1C-CO-ENS-NNN-NN-S-NN-FW
CSB01-1C-CO-ENS-NNN-NN-S-NN-FW
電動機不能正常升速1)變頻器輸入信號不正確。調速電位器或凸輪觸點接觸不良,或相關元件損壞,或端子松動及斷線,使變頻器給定值不能升高,導致電動機不能正常升速。2)交流電源或變頻器輸出缺相。電源缺相使變頻器輸出電壓降低,變頻器輸出缺相造成三相電壓不對稱而產生負序轉矩,都會使電動機電磁轉矩變小,不能驅動負載加速。此時應檢查熔絲有無熔斷,導線接頭有無松落斷路,逆變橋晶閘管是否損壞或有無觸發脈衝等現象。3)變頻器參數中頻率或電流設定值偏小。如果頻率設定在低值點上,頻率就會受到限制而無法升高,電機不能高速。如果電流設定值偏小,產生大轉矩的能力就會被限制,使電動機不能加速。若電流設定值已達變頻器的大值,則可能是變頻器容量偏小,需要更換更大容量的變頻器。若為閉環矢量控制,則可能自學習不成功,在輕載時工作正常,重載時由於特性差而不能加速。此時應檢查電機參數輸入是否正確並再次自學習。
機構運轉不穩或不能平滑調節這種故障出現無規律性且多為短暫性。主要有以下情況:1)電源為臨時電,同時現場電焊機等眾多設備工作無規律,造成電壓不穩定,使機構工作也不穩定。2)負載不正式、不穩定。3)外界噪音使變頻器信號受幹擾變化。應考慮使用屏蔽電纜,或增設進線濾波器等措施。
隨著變頻技術的日益發展,變頻調速係統相對傳統的繼電器接觸器控制係統有了較高的性價比,使變頻器在起重機上的應用不斷增長。因此,變頻器的故障診斷也已成為起重機電控係統故障診斷的重要組成部分之一。變頻器產生故障的因素,有硬件方面的,也有因使用維護不當造成的。對於硬件故障,要通過檢測找到故障件並進行修復或更換。通常查找重點放在I/O擴展模塊、接線端子等地方。而對於主電路板、電機控制和I/O板、控制盤的電路,由於其集成度且與其他電路之間都有可靠的隔離措施,因此故障率很低。即使發生故障,現場條件和常規手段也難以檢測,只能與供應商聯係,若有問題要更換電路板。對於使用維護方面的問題,應以變頻器自診斷或保護功能動作時顯示的信息為線索,對照電氣原理圖和其他相關圖紙,進行分析,採用相應的檢測手段找到故障點並修復。
變頻器無輸出電壓輸入變頻器啟動指令後,如變頻器無輸出電壓,可能是以下原因:1)主回路未接通。依照原理圖,檢查主回路通道起重機變頻器調試與維護中常見故障分析宋豫強,等生產實踐中所有開關、熔斷器、接觸器及電力電子器件是否完好,導線接頭有無接觸不良或松脫。2)控制回路接線有錯誤,變頻器為正確啟動。以變頻器說明書為依據,對照原理圖及接線圖認真核對控制回路接線,找出錯誤處並加以糾正。
變頻器接地故障1)變頻器輸出濾波器與變頻器不匹配,造成輸出側高頻短路。2)電機受潮或進水造成電機接地短路。3)線路受損接地。
過電流故障對於變頻器在調試與試運行期間出現過電流故障,可從電源、負載、變頻器、振蕩幹擾等方面找原因。1)電源電壓超限或缺相。電壓超限應按說明書規定的範圍進行調整。無論電源缺相或變頻器缺相,都會導致電動機轉矩減小而過流。2)負載過重或負載側短路。重點檢查機組有無異聲、振動和卡滯現象,是否因工藝條件或操作方法的改變而造成超載。負載側短路或接地,可用兆歐表進行檢測。逆變器同一橋臂的兩只晶體管同時導通也會形成短路。3)變頻器設定值不合適。一是電壓頻率曲線中電壓提升大於頻率提升,破壞了U/fi的比例關係,造成低頻率高壓而過流;二是加速時間過短,所需加速轉矩過大而造成過流;三是減速制動時間設定過短,機組迅速再生發電回饋給中間回路,造成中間回路電壓過高和制動回路過流。4)振蕩過流。一般在以某轉速(頻率)運行時發生。主要原因有兩個:一是電氣頻率與機械頻率發生共振;二是純電氣回路引起如功率開關管的死區控制時間,中間直流回路電容電壓的波動,電動機滯後電流的影響及外界幹擾源的幹擾等。對於第一種情況,降低載波頻率可能減小共振。在找出發生共振的頻率範圍後,利用跳躍頻率功能跳過該共振頻率。值得注意的是,使用變頻器驅動大慣量如大車機構時,常由一個變頻器驅動多個電機,採用V/f控制方式。當要求起制動較快時(如2s),則往往出現大車起制動振動劇烈,同時常伴有變頻器過流。這與機械傳動回路間隙成正比有很大關係。因此,應在機械減少間隙的同時採取減震措施。大車電機懸浮可擺動安裝就是這一事例的成功應用。5)變頻器容量偏小,應考慮換成大容量的變頻器。
過電壓故障在機構減速制動時變頻器常發生過電壓故障,其原因大都與中間回路及制動環節有關,主要是:1)電源電壓過高,一般超過10%以上。2)制動電阻阻值過大或損壞,無法及時釋放回饋的能量而造成過電壓。3)中間回路濾波器電容失效容量變小或檢測電路故障。應認真檢查電容器有、變色,閥是否脹出,箱體有無變形及漏液等現象。4)減速時間設定過短。5)對於安川CIMRG5A4係列變頻器,由於工廠現場電源一般為AC380V,所以應重新設定變頻器及制動斬波器電源電壓使之與其一致,以免起制動時變頻器出現過電壓故障。
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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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MEGA-DRIVE VACUUM PULL ROLL P569-137 strt
EXTRUDER ROLL ASSYMBLY 92"
SANDVIK STAINLESS STEEL BELT 1200SA AISI 301
KAYABA HYDROSTAR MRH-270 HYDRAULIC MOTOR
SCHEERER BEARING NCF-3064-V C3
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INA SL18 2984 CYLINDRICAL ROLLER BEARING 16 1/2" ID
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BRACKETT GEIGER WSA AUTOMATIC CLEANING FILTER
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INA SL18 2968 C3 CYLINDRICAL ROLLER BEARING
GOODYEAR HOT STOCK WITH WATER POLY BELT 72" X 200'
ALLEN BRADLEY AC SERVO CONTROLLER 1391B-ESAA22-AQB
FEDERAL PACIFIC FH220CFMD-1 220 KVA 460V TRANSFORMER
GOOD YEAR HOT STOCK WATER BELTING 72X200
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REEVES MOTO DRIVE 3035031640YN B342 5HP
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SPENCER VACUME PRODUCER M36105D4 1600 CFM
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WILLETT 3170 PRINTING SYSTEM LABELER
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IAP 26P CL50 ARR1 24000CFM
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Rosemount 1151DP5E22SPL4B4ML
ALLEN BRADLEY 1772-LH PROCESSOR INTERFACE MODULE
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ALLEN BRADLEY DH PLUS COMM INTERFACE MODULE 1785-KE B
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MAGNETIC BOTTLE CAP CONVEYOR 18FT STAINLESS STEEL
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CONVEYOR 8FT BALDOR MOTOR DAYTON GEAR
POWER CONVERSION BOARD CP6701X1-FAB
ALLEN BRADLEY RAM MEMORY MODULE 1772-MEB SER A REV A
TOSVERT 130 G1 TRANSISTOR INVERTER
ALLEN BRADLEY AC CRIVE 1336F-BRF30-AA-EN-HAS2-L6
WESTINGHOUSE MOTOR CONTROL A200MACX MODEL J
SM-CYCLO MOTOR 15HP
BALDOR MOTOR CWDM23933T 15 HP
HYDRAULIC CYLINDER 8" STROKE
Winsmith speed drive mixer gear box
THE IT PROTECTOR TRANSIENT VOLTAGE SURGE SUPPRESSOR
SKF CYLINDRICAL BEARING 32036X
delco fanuc a c servo motor ao6b-0522-b
Foxboro 130PB-N4
8 TON FEDERAL PUNCH PRESS EICHMAN
DOVER FLEXO P3 DFE TENSIONER
BERSTORF EXTRUDER GEAR 42972274.01 Z68
BERSTORF EXTRUDER GEAR 62853199.07 Z68
MARTIN GEAR SC3120
Chatillon HST-25 tester
RELIANCE ELECTRIC 16 BIT REGISTER OUTPUT MOD 45C-381B
TOLEDO SCALE 2185
FLOWSERVE ACUATOR B200D
RELIANCE ELECTRIC R-NET PROCESSOR 45C202A
ALLEN BRADLEY DRIVE IN 1305-BA09A SERIES C
GORMAN RUPP PUMP GHS2NK4-B
WARD LEONARD JOSLYN CLARK CONTACTOR 5DP4-5051-11
CONTINENTAL DISC CORP CFC-V 24" RUPTURE DISC 316
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SKF 23036C4/W33
ALLEN BRADLEY ANALOG OUTPUT 1771-OFC05
ALLEN BRADLEY ADJUST FREQUENCY AC MOTOR DRIVE 1333-YAA
NEXEN HORTON CLUTCH SEM-600A ELEMENT 1.125 BORE
ROSEMOUNT PRESSURE TRANSMITTER 1151DP3J12M1B1
PARKER BAYSIDE PLANETAR SERVO GEARHEAD PS180-016-SH
RELIANCE RECTIFIER STACK 86466-74D
STI VALUSCAN VS6500
GORMAN-RUPP PUMP GHS2NK3-B 38344-501
CROLL REYNOLDS EVACTOR AIR PUMP THERMOCOMPRESSOR CR32
RELIANCE ELECTRIC 16 BIT REGISTER OUTPUT MODULE 45C381B
NEMATRON WORKSTATION IWS 1000
PSR FSE IT
RELIANCE ELECTRIC CONTACTOR 417690-4R
HECO SPEED REDUCER 16CF1-45-4
HECO SPEED REDUCER 16CF1-45-7
NASH HYTOR VACUUM PUMP AL673 ALLIS CHALMERS MOTOR
ALLEN BRADLEY ACCU SORT ADAPTA SCAN 2755-SN5
ALLEN BRADLEY SLC 150 PROG CONTROLLER 1745-LP151 SER C
8.5" x 7" WAESCHLE COPERION ROTARY VALVE ZDD 250.1/5GG
GOULDS 3196 PUMP 1X1.5-6
GOOD YEAR CONVEYOR BELT 40X100
CLEVELAND WORM GEAR REDUCER 50AF 64:1 SERIES 25
CUTLER HAMMER TRANSFORMER 10 KVA S20N11S10N
LINK BELT HELICAL GEAR SPEED REDUCER 9536-005-MM 22.5HP
TEXTRON CONE DRIVE SHV30-ZOB 60 TO1 1.44HP
MODICON STAND ALONE MODEM AS-J478-010
SIGNODE AUTOMATIC CARTON BRIDGE STRAPPING MACHINE
LIGHTNIN NLDG-200 MIXER AERATOR
ALLEN BRADLEY 1771IFE ANALOG INPUT MODULE
ALLEN BRADLEY BAR CODE DECODER 2755-DD1A R1 SER B REV F
RELIANCE ELECTRIC AUTOMATE 45C305 30E PROCESSOR 4K
CUTLER HAMMER EXPANDABLE CONTROLLER MPC1C22
NORDSON INVERTED DUAL HIGH PRESSURE FLUID FILTER
FRICK BOARD 333Q0000547 RWBII PLUS REV D2
ALLEN BRADLEY PSI BUS CARD 1784-PKTXD
ALLEN BRADLEY TOUCHSCREEN MONITOR 2711-MT20X SER B
ALLEN BRADLEY ANALOG OUTPUT MODULE 1771-0FE1 B
PHD PARRALLEL GRIPPER GRC151-2-3001
CUTLER HAMMER REVERSE STARTER A210M0CAC J
Oil Gear hydraulic drive 20 hp type DR-2011
RELIANCE AC VS DRIVE GP-2000 2GU41007 D2-3166
AGET DUSTKOP 80E70
ALLEN BRADLEY CONTROL COPROCESSOR 1771-DMC/A
FAFNIR BEARING LCJO 2 11/16 4 BOLT FLANGE
MODICON PROGRAMMABLE CONTROLLER 884 AS-884A-311
VICKERS PUMP 25V17A 1A22R
SKF 32036X ROLLER BEARING 7"
REXNORD PILLOW BLOCK ZPS-5307-F
ALLEN BRADLEY SCANNER HEAD 2755-L7RD SER D
WAESCHLE DUAL CHANNEL DIVERTER WZK71-P1-CR 2 1/2
10" WAESCHLE COPERION ROTARY VALVE ZPD 320.1-21GG
6" WAESCHLE COPERION ROTARY VALVE ZPD 2001-5-GC
GOOD YEAR HOT STOCK WATER BELTING 72X40
ADATEK SYSTEM 10 DIGITAL I/O UNIT
AVTRON PULSE GENERATOR M628A
EL-O-MATIC ESA 350-4/A/L2 3"VALVE
EL-O-MATIC ESA 350-4/A/L2 3"VALVE .
ALLEN BRADLEY 1772-P1 SYSTEM POWER SUPPLY
ALLEN BRADLEY RAM MEMORY MODULE 1772-MEB
STEARNS SPRING-SET DISC BRAKE 108706100QF REV B
NEXEN EN40-1B CONVERTER 1.5 85 PSI 912028
ALLEN BRADLEY 2706-E43C32B1 DATALINER
YASKAWA MINERTIAMOTOR P SERIES MOTOR P12S-LG12
RELIANCE ELECTRIC FIELD CONTROLLER 0-51893-4
CROUSE HINDS HAZARD GARD EVMCX42071/MT LIGHT FIXTURE
DUNCAN ELECTRIC KILN EA-122 9
RELIANCE ELECTRIC ANALOG INPUT MODULE 57C409
Centric Clutch Trig-o-matic Zurn Model F release
SCHAEVITZ SPRING LOADED GAGE HEAD GCA-121-1000 +/- 1"
STOBER TD27-0000-F-K-56 ADJUSTABLE SPEED DRIVE 1HP
EATON CUTLER HAMMER SJ COIL C070116
RELIANCE ELECTRIC 814.56.00 PC BOARD
ALLEN BRADLEY DRIVE IN 1305-BA09A SERIES C
BEST PUMP WORKS DL11995 1X1.25X5
DODGE QUANTIS HB683CN180TC 59.91:1
FLOWSERVE PUMP WORKS DL11995 1X1.25X5
FISHER ROSEMOUNT ANALOG INPUT OUTPUT CARD 12P0663X032
FISHER ROSEMOUNT WEIGH SCALE CARD 41B5228X312 CL6921X1
GOULDS 3196 PUMP 2X3-6
Lincoln Electric LN-9 GMA Precision Wire Feeder Un
Fanuc AC Spindle Servo Unit A06B-6059-H002 un
Sperry Vickers Deceleration Valve Check DT15S2-060-K-11
Sensotec 441-30K 30,000 Load Cell Low-Profile Pancake
Nu-Era 17 Drawer Storage Cabinet Tool Box
Square D Symax 8030 CRM511 Ser A1 30608-502-58
Cutler Hammer 511H119441 Eaton Brake Assy 440v
RoMan Spot Welding Transformer #M446200PA2FOL
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Kennedy 8" Class 250 Flanged Valve Fire Main Gate 888H
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