P37211-4-0369

3 igbt应用中的常见问题分析
　　显然，igbt是作为逆变器的开关元件应用到各个系统中的，常用的控制方法是pwm法。理论上和事实上都已经证明，如果把pwm逆变器的开关频率提高到20khz以上，逆变器的噪声会更小，体积会更小，重量会更轻，输出电压波形会更加正弦化，可见，高频化是逆变技术发展方向［1］。但是通常的pwm逆变器中，开关器件在高电压下导通，在大电流下关断，处于强迫开关过程，在高开关频率下运行时将受到如下一系列因素的限制：
　　（1） 产生擎住效应或动态擎住效应

　　igbt为四层结构，使体内存在一个寄生晶闸管，等效电路如图4所示。在npn管的基极与发射极之间存在一个体区短路电rs，p型体区的横向空穴流会产生一定的压降，对j3来说相当于一个正偏置电压。在规定的范围内，这个正偏置电压不大，npn管不会导通。当ic大于一定程度时，该正偏置电压足以使npn管开通，进而使npn和pnp管处于饱和状态，于是寄生晶闸管开通，栅极失去控制作用，即擎住效应，它使ic增大，造成过高的功耗，甚至导致器件损坏。温度升高会使得igbt发生擎住的icm严重下降［2］。
　　在igbt关断的动态过程中，如果dvce/dt越高，则在j2结中引起的位移电流cj2dvce/dt越大，当该电流流过体区短路电阻rs时，可产生足以使npn晶体管开通的正向偏置电压，满足寄生晶闸管开通擎住的条件，形成动态擎住效应。温度升高会加重igbt发生动态擎住效应的危险。
　　（2） 过高的di/dt会通过igbt和缓冲电路之间的线路电感引起开关时的电压过冲

　　以线路电感lб≠0时电路进行分析，如图5所示，关断过程中，感性负载电流iб保持不变，即iб=it+id保持不变，it从零增大到iб。由于二极管d导通，voe=0，由于it随时间线性减小，电感lб两端感应电压vl=vbc=lбdit/dt应为负值，
　　vcb为正值， 即c点电位高于b点电位。
　　由于 it=i0（1-t/tfi）
　　故 vl=vbc=lбdit/dt=-lбi0/tfi《0
　　vcb= -vbc= lбi0/tfi
　　在it下降的tfi期间，开关两端电压
　　vt=vcem=vd-vl=vd+lбi0/tfi
　　因此， 在关断过程一开始，vt立即从零上升到vcem， it在从i0下降至零期间， vt=vcem不变。直到it=0、id=i0以后，
　　vt才下降为电源电压vd，如图5（b）所示。vcem超过vd的数值取决于lб、tfi和负载电流i0，
　　显然过快的电流下降率di/dt（即tfi小）、过大的杂散电感lб或负载电流过大都会引起关断时元件严重过电压， 且伴随着很大的功耗。
　　可见，尽管igbt的快速开通和关断有利于缩短开关时间和减小开关损耗，但过快的开通和关断，在大电感负载下，反而是有害的，开通时，存在续流二极管反向恢复电流和吸收电容器的放电电流，则开通越快，igbt承受的峰值电流也就越大，甚至急剧上升，导致igbt或者续流二极管损坏。关断时，大电感负载随igbt的超速开通和关断，将在电路中产生高频、幅值很高而宽度很窄的尖峰电压ldi/dt，常规的过电压吸收电路由于受到二极管开通速度的限制难以吸收该尖峰电压，因而vce陡然上升产生过冲现象，igbt将承受较高的dvce/dt冲击，有可能造成自身或电路中其它元器件因过电压击穿而损坏。         咨询热线：18150695049
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(8843) Allen Bradley Processor MIni PLC 2/02 w P Supply 1772-L2P

Allen Bradley 500FFOD930 (AS PICTURED) **GENUINE** 500F FOD 930

ALLEN BRADLEY 1336F-BRF100-AA-EN-HCS2-L6 SERIES A,  FREQUENCY AC DRIVE,  #133145

NEW ALLEN-BRADLEY 2711-B6C10L1/C  2711B6C10L1 SERIES C

ALLEN BRADLEY 2706-P72CN2, SERIES C, REVISION B, MESSAGE DISPLAY,, SEE D #228409

ALLEN BRADLEY 1326AB-B515G-21 SER.C SERVO MOTOR *NEW NO BOX*

ALLEN BRADLEY 1756-L63 SERIES B CONTROL LOGIX 5563 PROCESSOR #184648

ALLEN BRADLEY 140G-M6X3  MOLDED CASE CIRCUIT BREAKER FRAME

ALLEN BRADLEY 1772-LSP/HA RQAUS1 1772LSPHA

ALLEN BRADLEY 1333-DAA RQANS2 1333DAA

New in Sealed Box AB Allen Bradley 25B-D043N1?14 25BD043N1?14 PowerFlex 525 480V

ALLEN BRADLEY 5110-A8/A RQAUS1 5110A8A

Allen Bradley 810A14A NSFP **GENUINE** AB 810 A14A

Allen Bradley MPL-B330P-SJ22AA Servomotor

AB ALLEN BRADLEY ControlLogix 2 MB Memory Controller 1756-L61 New in Box

ALLEN BRADLEY MPL-B560F-MJ22AA RQAUS1 MPLB560FMJ22AA

Allen Bradley Panelview 1250 2711P-T12C4A2 Ser E Rev G

ALLEN BRADLEY 6181-C1BCBBZZZ RQAUS1 6181C1BCBBZZZ

FACTORY SEALED Allen Bradley 1747-L551 /C SLC 500 SLC 5/05 Controller

ALLEN BRADLEY 1784-PCMC RQANS1 1784PCMC

Allen Bradley Panelview 600  2711-T6C16L1 Ser B Rev F Frn 4.46

2014 New in SEAL box Allen Bradley Powerflex 525 480VAC 25B-D043N114 25BD043N114

ALLEN BRADLEY 2711-T5A1L1 RQANS1 2711T5A1L1

ALLEN BRADLEY 1336S-BRF100-AN-EN-L6 RQAUS1 1336SBRF100ANENL

ALLEN BRADLEY 2711-T5A1L1 SER. B REV. E FRN 4.46 PANELVIEW *NEW IN BOX*

ALLEN BRADLEY 1336S-BRF100-AN-EN4-L5 RQAUS1 1336SBRF100ANENB

ALLEN BRADLEY 1336S-BRF100-AN-EN10 RQAUS1 1336SBRF100ANEN1

NEW ALLEN BRADLEY PV600  2711-B6C10  SER  B  FRN 4.21  DEVICENET  2711B6C10  NIB

ALLEN BRADLEY PANELVIEW 600 2711-B6C10 SER. B REV. J FRN. 4.21 *NEW IN BOX*

ALLEN BRADLEY 2711P-T10C4D5 RQAUS1 2711PT10C4D5

ALLEN BRADLEY MPL-A4540F-MK24AA RQANS1 MPLA4540FMK24AA

ALLEN BRADLEY 512-DDCD-26R RQANS1 512DDCD26R

ALLEN BRADLEY 1336F-BRF75-AN-EN-HCS1-L9E RQANS1 1336FBRF75ANENH2

ALLEN BRADLEY 1791-IOBW RQANS1 1791IOBW

ALLEN BRADLEY 1336S-BRF75-AE-EN3 RQANS2 1336SBRF75AEEN3

Allen Bradley PanelView 1000 2711-K10C8 Ser D FRN 4.20 REV B

New Allen Bradley PanelView 1000 2711P-K10C4D1 Ser A RevJ 2711P-RDK10C 2711P-RP1

New In Box Allen Bradley 2711-K6C20X Ser. C 4.48 FRN PanelView 600

Allen Bradley 520FCOD SER.C NSFP **GENUINE** AB 520F COD

Allen Bradley 520FCOD SER. X NSNP **GENUINE** AB 520F COD

ALLEN-BRADLEY 1388-AV20 DC SERVO CONTROLLER, REMANUFACTURED

ALLEN BRADLEY 1771-QC RQANS1 1771QC

Allen Bradley 520FCOD SER. W NSFP **GENUINE** AB 520F COD

ALLEN BRADLEY 1400-PD51B RQAUS1 1400PD51B

ALLEN BRADLEY 74101-181-51 RQANS2 7410118151

Allen Bradley 520FCOD SER. C NSNP **GENUINE** AB 520F COD

ALLEN BRADLEY 1400-PD11A RQAUS1 1400PD11A

ALLEN BRADLEY 1400-PD52A RQAUS1 1400PD52A

ALLEN BRADLEY MPL-B580J-SJ72AA RQAUS1 MPLB580JSJ72AA

ALLEN BRADLEY 1754-L28BBB RQANS2 1754L28BBB

ALLEN BRADLEY SERVO MOTOR                  MPL-A330P-SJ22AA

NEW  2010  SEALED  ALLEN BRADLEY  1747-L551  SER C 1747L551  FRN 11 ETHERNET NIB

ALLEN BRADLEY 1336F-BRF15-AF-EN-GMS1-HJ2-L6 RQANS2 1336FBRF15AFENGM

Allen Bradley 1394-SJT05-C-RL Digital Servo Controller, 5KW System Module - U...

ALLEN BRADLEY 1772-ME8 -FS-

ALLEN BRADLEY 2098-IPD-020-DN RQAUS1 2098IPD020DN

ALLEN BRADLEY 150-B35NBD RQAUS1 150B35NBD

Allen Bradley 2711-B5A9 /F PanelView 550 Mono/Touch/Key/RS232(DH-485)/RS232-P AC

ALLEN BRADLEY 900156 RQAUS1 900156

ALLEN BRADLEY 900155 RQAUS1 900155

ALLEN BRADLEY 20AE022A0AYNNNC0 SER. A POWERFLEX **

ALLEN BRADLEY 6180-EJIEFLAIEBZ RQAUS1 6180EJIEFLAIEBZ

2711PC-T10C4D8 Allen-Bradley PanelView Plus 1000 2711PT10C4D8  2015

ALLEN BRADLEY 150-F361NBD SMC-FLEX 460V-AC 361A SOFT START MOTOR DRIVE D550594

ALLEN BRADLEY 6180-FLLEGLZZHCZ RQAUS1 6180FLLEGLZZHCZ

ALLEN BRADLEY 1756-L61B,1756-CNB/E,1756-ENBT/A,(2)1756-IF16/A,1756-IA16/A,MORE..

ALLEN BRADLEY 6180-EJLEGFZZECZ RQAUS1 6180EJLEGFZZECZ

ALLEN BRADLEY 1336S-BRF100-AA-EN-HA2-L6 RQAUS1 1336SBRF100AAEN1

ALLEN BRADLEY 1772-LW RQANS2 1772LW

ALLEN BRADLEY 2711E-T14C6 Panelview Repair Service Only!!!

ALLEN BRADLEY CONTROLLOGIX LOADED 7 SLOT RACK COMPLETE  SYSTEM

ALLEN BRADLEY 2094-BL25S RQANS1 2094BL25S

Allen Bradley SST-DHP-PCI, New, SSTDHPPCI, Fast Shipping

New Sealed Allen Bradley 1794-L34 /B FlexLogix Processor 512KB Memory F/W 1.2

ALLEN BRADLEY 3100-UC2 RQANS2 3100UC2

ALLEN BRADLEY 1336F-CWF20-AN-EN-HASP-L4 RQANS1 1336FCWF20ANENHA

ALLEN BRADLEY 1756-CN2R RQANS1 1756CN2R

Allen Bradley 440LP4J1280YD NSFP **GENUINE** 440L P4J1280YD

ALLEN BRADLEY 1336F-BRF100-AA-EN-HCS2-L6 SER. A AC DRIVE *NEW NO BOX*

ALLEN BRADLEY 1756-RM2 RQAUS1 1756RM2

ALLEN BRADLEY 6182H-10KRH4B RQAUS1 6182H10KRH4B

ALLEN BRADLEY POWERFLEX 700 SERIES-A  20B C 5P0 A 0 AYNANC0

Allen Bradley 2098-DSD-030X-DN /B Ultra 3000 Servo Drive DeviceNet 30A FRN V1.52

1756-L71S ALLEN BRADLEY LOGIX 5571S AUTOMATION CONTROLLER

Factory Sealed Allen Bradley 1771-NBV1 /C 1771NBV1 New Nib FS 2009 PLC-5

ALLEN BRADLEY 1769-L23E-QBFC1B RQAUS1 1769L23EQBFC1B

ALLEN BRADLEY 6181-CFEDBCZZZ RQAUS1 6181CFEDBCZZZ

2711P-T15C4A2  ALLEN BRADLEY PANELVIEW PLUS MONITOR

Allen Bradley 1326from - B430g - M2l Servo Engine 460v,6.4nm,5000rpm

ALLEN BRADLEY   PV+  1500   2711P-T15C4A2  2010  2711PT15C4A2  NEW  TOUCHSCREEN

ALLEN BRADLEY 1336F-BRF75-AN-EN-HCS1-L6 RQAUS1 1336FBRF75ANENH1

ALLEN BRADLEY 20BD022A3AYNAED1 RQAUS1 20BD022A3AYNAED1

ALLEN BRADLEY 8520-1APA1 Processor Repair Service Only!!!

ALLEN BRADLEY 6181P-15TS2KH RQAUS1 6181P15TS2KH

6186M15PN Allen Bradley MONITOR

ALLEN BRADLEY 20AD014C3AYNANC0 -NEW-

ALLEN BRADLEY 8520-AA21 RQAUS1 8520AA21

ALLEN BRADLEY 1336S-BRF07-AA-EN4-L6 RQAUS1 1336SBRF07AAEN4L

ALLEN BRADLEY  1771-VHSC -FS-

Allen Bradley 2711P-B7C4D2 NEW 5.5" ASSEMBLED TERMINAL PANELVIEW PLUS

Allen Bradley 1794-L34 FlexLogix Processor 512KB - New Surplus Open - Series B

One New In Box AB Allen Bradley 2711P-RDT12C PanelView Plus Display Module

Allen-Bradley 1771-NIV/B Lifetime Warranty !!!

ALLEN BRADLEY 150-A54NBDE RQAUS1 150A54NBDE

ALLEN BRADLEY 1753-IB20XOB8 RQAUS1 1753IB20XOB8

ALLEN BRADLEY   PV+  1500   2711P-T15C4A2  2009  2711PT15C4A2  NEW  TOUCHSCREEN

Allen-Bradley PANEL VIEW Plus 1250  2711P-RDB12C + 2711P-RP6  + 2711P-B12C4D6

ALLEN BRADLEY 1336S-B010-AA-EN-HA2-L4 RQAUS1 1336SB010AAENHAB

ALLEN BRADLEY 1336F-BRF150-AN-EN-HAS1-LA6 RQAUS1 1336FBRF150ANENH

ALLEN BRADLEY 1771-P5E RQANS1 1771P5E

ALLEN BRADLEY 1771-OM RQANS1 1771OM

ALLEN BRADLEY 500FL-FOB93 RQAUS1 500FLFOB93

New Allen Bradley 2711-T5A9L1 /B PanelView 550 Mono/Touch/RS232(DH-485) FRN 4.41

ALLEN BRADLEY 40888-490-01-A1FX RQAUS1 4088849001A1FX

ALLEN BRADLEY   PV+  1500   2711P-T15C4A2  2008  2711PT15C4A2  NEW  TOUCHSCREEN

NEW SEALED 2012 ALLEN BRADLEY PV600 2711-T6C15L1  SER B  FRN 4.48 2711T6C15L1

Allen-Bradley 1775-MR8 Lifetime Warranty !!!

ALLEN BRADLEY 2098-DSD-075X RQAUS1 2098DSD075X

Allen Bradley 2098-DSD-HV100X-DN Ultra 3000i Servo Drive, DeviceNet, 1.51

ALLEN BRADLEY Y-1002-2-H00-X103 RQAUS1 Y10022H00X103

Allen Bradley 1771-IB DC Input Module (Pack of 6) -

1772-M16 , ALLEN-BRADLEY  ALLEN-BRADLEY 1772M16

ALLEN BRADLEY 2711P-T6C5D -FS-

185694 ALLEN BRADLEY MAIN CONTROL BOARD FIRMWARE REV 8.1 DRIVE--SA

ALLEN BRADLEY1336 PLUS II SENSORLESS VECTOR 1336F-BRF75-AA-EN-HAS-L4 7.5 HP

(1) ALLEN BRADLEY 1327AC-AFM-04-E_1327_HIGH PERFORMANCE AC MOTOR

Allen Bradley, 8520-KBI2, Keyboard I/O Ring Interface NEW

ALLEN BRADLEY 3500-P72 RQAUS1 3500P72

Allen Bradley Panelview 1000 2711-K10G1 FRN 4.43 Good Condition READ

Allen Bradley 1397-B025N 1397B025N 25HP

Allen bradley 2711P-T10C4D8

ALLEN BRADLEY 1336F-BRF50-AA-EN-HCS2-L8E RQANS1 1336FBRF50AAEN11

ALLEN BRADLEY 2711PC-B4C20D RQANS1 2711PCB4C20D

ALLEN BRADLEY 1394-SJT10-E 1394SJT0E READ

Allen Bradley 8410MTVE CNC Control

ALLEN BRADLEY 1336S-C025-AN-FR5 RQAUS1 1336SC025ANFR5

ALLEN BRADLEY 1771-IF05 12BIT ANALOG INPUT MODULE  60 DAY WARRANTY!

Allen-Bradley 2711CT10C PanelView C1000 Component 2015

Allen Bradley PanelView Plus 1250 2711P-T12C4D6 Touch Screen w/ 2711P-RP6 Logic

ALLEN BRADLEY SP-144445 KIT *NEW IN A BOX*

ALLEN BRADLEY 2094-BM05 SERIES A SERVO MODULE *New No Box*

ALLEN BRADLEY 20-COMM-R RQAUS1 20COMMR

ALLEN-BRADLEY 1336-B015-EAE-FA2-L1 DRIVE 15HP 460VAC 3 PHASE CONTROLLER NS**

ALLEN BRADLEY 445-P4L0720YD SER. A TRANSMITTER & RECEIVER *NEW IN BOX*

Allen Bradley Panelview 900 2711-T9A1 Ser F Rev D FRN 3.03

Allen Bradley Powerflex 700 20BC056A3AYNANC0  AC Drive 40 HP 400V Tested Good

ALLEN BRADLEY 1326AB-B720E-21-715 SERVO MOTOR **

Allen-Bradley 2711-K6C9 PanelView 600

Allen Bradley Versa View 1500W--- 6180W-15BP2KH   Ser. A  Rev. B

ALLEN BRADLEY 1336F-CWF20-AA-EN-L4 RQAUS1 1336FCWF20AAENL4

Allen-Bradley AB 798 Series Size 4 Starter 225 Amp Breaker MCC MCCB Bucket Sz4

1769-L30ERM 1769L30ERM Ser A Allen Bradley CompactLogix 1MB Controller (New)

ALLEN BRADLEY 8000-AAGM CIRCUIT BOARD 900105 REV-2E *NEW NO BOX*

Allen Bradley Panelview 900  2711-K9C3 Ser C Rev E FRN 3.13

Allen Bradley 509-FOD Ser L Size 5 270 Amp Max 600 Volt Max Starter 120 v coil

Allen Bradley Panelview 900 2711-K9C3 Ser C Rev E FRN 3.13

ALLEN BRADLEY 6185-CAZBBZZ SER. A OPERATOR INTERFACE **

AB Allen-Bradley 1769-L35E /A CompactLogix Processor New

Allen Bradley AC Servo Controller Axis Module 1394C-AM50 Ser C

ALLEN BRADLEY SERVO MOTOR, MODEL# 1326AB-B430G-S2K4L, WITH 1 YEAR WARRANTY

ALLEN BRADLEY POWERFLEX 70  20AD5POA0NYYNDNN *NEW IN BOX*

ALLEN BRADLEY PC-128-0790 **

ALLEN BRADLEY MPL-B420P-MJ22AA SERIES A *NEW IN A BOX*

ALLEN BRADLEY POWERFLEX 700 20BD022A0AYYANN0 SER. A AC DRIVE *NEW IN BOX*

ALLEN BRADLEY 709-FOD103 SERIES K STARTER **

ALLEN BRADLEY 1398-DDM-019 SER.B SERVO DRIVE **

ALLEN BRADLEY 1775-ME8 RQANS1 1775ME8

New Sealed Allen Bradley  MPL-B520K-SK72AA /A MPLB520KSK72AA

ALLEN BRADLEY 74102-172-22 RQAUS1 7410217222

ALLEN BRADLEY POWERFLEX 700 20BD8P0A0AYNADC1 SER. A AC DRIVE *NEW IN BOX*

Allen Bradley 2711-K10G15 Ser A Rev C FRN 3.13 Panelview 1000 2711K10G15 2711-KI

ALLEN BRADLEY FLEX I/O 1794-ASB SER. E F/W D POWER SUPPLY ADAPTER *NEW IN BOX*

ALLEN BRADLEY 2711P-K7C4A1 RQAUS1 2711PK7C4A1

ALLEN BRADLEY 1391-DES45-DI-AQB RQAUS1 1391DES45DIAQB

ALLEN BRADLEY 1305-BA06A-HA1 RQAUS1 1305BA06AHA1

ALLEN BRADLEY 513-DCB-A2K-47-90 RQANS2 513DCBA2K4790

ALLEN BRADLEY 6181-CHEDBCZZZ RQAUS1 6181CHEDBCZZZ

ALLEN BRADLEY 4100-212-PR RQANS1 4100212PR

2711-B5A5L1 Series H Allen-Bradley Panelview 550

Allen Bradley 1336S-B025-AE  25 HP 460 VAC 1336 Plus Sensorless Vector Drive

Allen Bradley Brushless Servo Motor F-4030-Q-H00AA Series A, P/N 193488

ALLEN BRADLEY 1336S-BRF30-AN-EN3 SER.D IMPACT AC DRIVE *NEW IN A BOX*

Allen Bradley Powerflex 700 20BD052A3AYNAEC0 AC Drive 40 HP 480V Tested Ser. B

ALLEN BRADLEY PROCESSOR UNIT

ALLEN BRADLEY PANELVIEW  2711-B5A2

Allen Bradley High Performance AC Drive, 1392-B030-RF-MC-A-D1, , WARRANTY

ALLEN BRADLEY 1756-L72 SER B LOGIX 572S AUTOMATION CONTROLLER 1756L72

NEW SEALED 2013 Allen Bradley 1769-L30ERM /A

1769-L18ERM-BB1B 1769L18ERMBB1B Allen Bradley CompactLogix (New Sealed)

ALLEN-BRADLEY 1336E-BRF100-AA-EN-HA2-L6 DRIVE AC 10HP 380-480VAC/513-620VDC

ALLEN BRADLEY 2711-TC4 SER F INTERFACE  NO KEY (REMANUFACTURED) *NEW IN A BOX*

ALLEN BRADLEY 1336S-R030-AN-EN SERIES C AC DRIVE *NEW OUT OF BOX*

ALLEN BRADLEY 2364SPM03A PC BOARD  (REMANUFACTURED) *NEW IN A BOX*

ALLEN BRADLEY 2098-DSD-HV030X SERIES B ULTRA 3000i DIGITAL SERVO INDEXING DRIVE

ALLEN BRADLEY VERSA VIEW CE1500H OPERATOR INTERFACE 6182H-15KRH4B 6189-RPRH

New Allen Bradley 1747-L553 /B SLC 500 SLC 5/05 Processor

1 PC New In Box AB Allen Bradley HMI 2711P-T10C4D8 Factory Sealed

ALLEN BRADLEY PANELVIEW 1400E 2711E-T14C6 SER E REV A FREE SHIP

New Sealed Allen Bradley 1756-L62S /B 2013 GuardLogix Logix5562 Safety Processor

ALLEN BRADLEY 300 HP SOFT MOTOR STARTER 150-A360NBD

Allen-Bradley ControlLogix 10 Slot Chassis w/Power Supply & Modules

Allen-Bradley 2094-BC07-M05 Ser A Kinetix 6000 Integrated Axis Module

Rblt Allen Bradley PowerFlex 70 VFD 20AD052A3AYNANCN  40 HP  18M Warr.

Rblt Allen Bradley PowerFlex 70 VFD 20AD052A3AYNANNN  40 HP  18M Warr.

Rblt Allen Bradley PowerFlex 70 VFD 20AD052A3NYNANNN  40 HP  18M Warr.

Rblt Allen Bradley PowerFlex 70 VFD 20AD052A3NYNANCN  40 HP  18M Warr.

ALLEN BRADLEY 1756-CN2R -FS-

Rblt Allen Bradley PowerFlex 70 VFD 20AD052A3NYNANC0  40 HP  18M Warr.

Allen Bradley High Performance AC Motor 1327AA-BB-40-G _ 1327AABB40G

Rblt Allen Bradley PowerFlex 70 VFD 20AD052A3AYNANC0  40 HP  18M Warr.

Rblt Allen-Bradley PowerFlex 700 VFD 20BD040A3AYNACC0  30 HP, 480 V,  18M WTY

Rblt Allen-Bradley PowerFlex 700 VFD 20BD040A3AYNACN0  30 HP, 480 V,  18M WTY

Rblt Allen-Bradley PowerFlex 700 VFD 20BD040A0AYNACC0  30 HP, 480 V, 18MO WTY

Rblt Allen-Bradley PowerFlex 700 VFD 20BD040A0AYNACN0  30 HP, 480 V,  18M WTY

Rblt Allen Bradley PowerFlex 700 VFD 20BD027A3AYNAEA0  20 HP, 480 V,  18M Wty

Allen Bradley 9/Serial Operator Panel 8520-VOP1 160609

Allen Bradley 6724-PLX1 SER A 95677302 Process Controller CPU

Allen Bradley Panelview Plus 1000 2711P-K10C4A1  /A 2711PK10C4A1 2711P-RP1A

Allen-Bradley PowerFlex 70 VFD 20AC037A3AYNANNN  18.5 kW  18M Warr.

Allen-Bradley PowerFlex 70 VFD 20AC037A3AYNANCN  18.5 kW  18M Warr.

Allen-Bradley 2711P-T10C21D8S PanelView PLUS 7 Color Touch 10.4" 09/2016 Sealed

ALLEN BRADLEY 1336S-B010VAA-BM-CC-CF-D11-D61-HAPC-JF-JR-LR-ME-N3 RQAUS1 1336SB01

ALLEN BRADLEY 20BD022A0AYNANN0 RQAUS1 20BD022A0AYNANN0